/* Definitions for GCC. Part of the machine description for CRIS.
- Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
Contributed by Axis Communications. Written by Hans-Peter Nilsson.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "function.h"
#include "toplev.h"
#include "recog.h"
+#include "reload.h"
#include "tm_p.h"
#include "debug.h"
#include "output.h"
#define ADDITIVE_SIZE_MODIFIER(size) \
((size) <= 63 ? "q" : (size) <= 255 ? "u.b" : (size) <= 65535 ? "u.w" : ".d")
-#define ASSERT_PLT_UNSPEC(x) \
- do \
- { \
- if (XEXP (x, 1) != NULL_RTX \
- || (GET_CODE (XVECEXP (x, 0, 0)) != SYMBOL_REF \
- && GET_CODE (XVECEXP (x, 0, 0)) != LABEL_REF)) \
- abort (); \
- } while (0)
+#define ASSERT_PLT_UNSPEC(x) \
+ CRIS_ASSERT (XINT (x, 1) == CRIS_UNSPEC_PLT \
+ && ((GET_CODE (XVECEXP (x, 0, 0)) == SYMBOL_REF) \
+ || GET_CODE (XVECEXP (x, 0, 0)) == LABEL_REF))
#define LOSE_AND_RETURN(msgid, x) \
do \
return; \
} while (0)
+enum cris_retinsn_type
+ { CRIS_RETINSN_UNKNOWN = 0, CRIS_RETINSN_RET, CRIS_RETINSN_JUMP };
+
/* Per-function machine data. */
struct machine_function GTY(())
{
int needs_return_address_on_stack;
+
+ /* This is the number of registers we save in the prologue due to
+ stdarg. */
+ int stdarg_regs;
+
+ enum cris_retinsn_type return_type;
};
/* This little fix suppresses the 'u' or 's' when '%e' in assembly
pattern. */
static char cris_output_insn_is_bound = 0;
-/* This one suppresses printing out the "rPIC+" in
- "rPIC+sym:GOTOFF+offset" when doing PIC. For a PLT symbol, it
- suppresses outputting it as [rPIC+sym:GOTPLT] and outputs similarly
- just the "sym:GOTOFF" part. */
-static int cris_pic_sympart_only = 0;
+/* In code for output macros, this is how we know whether e.g. constant
+ goes in code or in a static initializer. */
+static int in_code = 0;
/* Fix for reg_overlap_mentioned_p. */
static int cris_reg_overlap_mentioned_p (rtx, rtx);
static void cris_print_index (rtx, FILE *);
+static void cris_output_addr_const (FILE *, rtx);
+
static struct machine_function * cris_init_machine_status (void);
static rtx cris_struct_value_rtx (tree, int);
static int saved_regs_mentioned (rtx);
-static void cris_target_asm_function_prologue (FILE *, HOST_WIDE_INT);
-
-static void cris_target_asm_function_epilogue (FILE *, HOST_WIDE_INT);
-
static void cris_operand_lossage (const char *, rtx);
+static int cris_reg_saved_in_regsave_area (unsigned int, bool);
+
static void cris_asm_output_mi_thunk
(FILE *, tree, HOST_WIDE_INT, HOST_WIDE_INT, tree);
static bool cris_rtx_costs (rtx, int, int, int *);
static int cris_address_cost (rtx);
static bool cris_pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
- tree, bool);
+ const_tree, bool);
+static int cris_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
+static tree cris_md_asm_clobbers (tree, tree, tree);
-/* The function cris_target_asm_function_epilogue puts the last insn to
- output here. It always fits; there won't be a symbol operand. Used in
- delay_slots_for_epilogue and function_epilogue. */
-static char save_last[80];
-
-/* This is the argument from the "-max-stack-stackframe=" option. */
-const char *cris_max_stackframe_str;
-
-/* This is the argument from the "-march=" option. */
-const char *cris_cpu_str;
-
-/* This is the argument from the "-mtune=" option. */
-const char *cris_tune_str;
-
-/* This is the argument from the "-melinux-stacksize=" option. */
-const char *cris_elinux_stacksize_str;
+static bool cris_handle_option (size_t, const char *, int);
/* This is the parsed result of the "-max-stack-stackframe=" option. If
it (still) is zero, then there was no such option given. */
#undef TARGET_ASM_UNALIGNED_DI_OP
#define TARGET_ASM_UNALIGNED_DI_OP TARGET_ASM_ALIGNED_DI_OP
-#undef TARGET_ASM_FUNCTION_PROLOGUE
-#define TARGET_ASM_FUNCTION_PROLOGUE cris_target_asm_function_prologue
-
-#undef TARGET_ASM_FUNCTION_EPILOGUE
-#define TARGET_ASM_FUNCTION_EPILOGUE cris_target_asm_function_epilogue
-
#undef TARGET_ASM_OUTPUT_MI_THUNK
#define TARGET_ASM_OUTPUT_MI_THUNK cris_asm_output_mi_thunk
#undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
#define TARGET_ADDRESS_COST cris_address_cost
#undef TARGET_PROMOTE_FUNCTION_ARGS
-#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_tree_true
+#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_const_tree_true
#undef TARGET_STRUCT_VALUE_RTX
#define TARGET_STRUCT_VALUE_RTX cris_struct_value_rtx
#undef TARGET_SETUP_INCOMING_VARARGS
#define TARGET_SETUP_INCOMING_VARARGS cris_setup_incoming_varargs
#undef TARGET_PASS_BY_REFERENCE
#define TARGET_PASS_BY_REFERENCE cris_pass_by_reference
+#undef TARGET_ARG_PARTIAL_BYTES
+#define TARGET_ARG_PARTIAL_BYTES cris_arg_partial_bytes
+#undef TARGET_MD_ASM_CLOBBERS
+#define TARGET_MD_ASM_CLOBBERS cris_md_asm_clobbers
+#undef TARGET_DEFAULT_TARGET_FLAGS
+#define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT | CRIS_SUBTARGET_DEFAULT)
+#undef TARGET_HANDLE_OPTION
+#define TARGET_HANDLE_OPTION cris_handle_option
struct gcc_target targetm = TARGET_INITIALIZER;
-/* Predicate functions. */
+/* Helper for cris_load_multiple_op and cris_ret_movem_op. */
-/* This checks a part of an address, the one that is not a plain register
- for an addressing mode using BDAP.
- Allowed operands is either:
- a) a register
- b) a CONST operand (but not a symbol when generating PIC)
- c) a [r] or [r+] in SImode, or sign-extend from HI or QI. */
-
-int
-cris_bdap_operand (rtx op, enum machine_mode mode)
+bool
+cris_movem_load_rest_p (rtx op, int offs)
{
- register enum rtx_code code = GET_CODE (op);
-
- if (mode != SImode && (mode != VOIDmode || GET_MODE (op) != VOIDmode))
- return 0;
-
- /* Just return whether this is a simple register or constant. */
- if (register_operand (op, mode)
- || (CONSTANT_P (op) && !(flag_pic && cris_symbol (op))))
- return 1;
-
- /* Is it a [r] or possibly a [r+]? */
- if (code == MEM)
- {
- rtx tem = XEXP (op, 0);
-
- if (mode == SImode
- && (register_operand (tem, SImode)
- || (GET_CODE (tem) == POST_INC
- && register_operand (XEXP (tem, 0), SImode))))
- return 1;
- else
- return 0;
- }
-
- /* Perhaps a sign-extended mem: [r].(b|w) or [r+].(b|w)? */
- if (code == SIGN_EXTEND)
+ unsigned int reg_count = XVECLEN (op, 0) - offs;
+ rtx src_addr;
+ int i;
+ rtx elt;
+ int setno;
+ int regno_dir = 1;
+ unsigned int regno = 0;
+
+ /* Perform a quick check so we don't blow up below. FIXME: Adjust for
+ other than (MEM reg). */
+ if (reg_count <= 1
+ || GET_CODE (XVECEXP (op, 0, offs)) != SET
+ || !REG_P (SET_DEST (XVECEXP (op, 0, offs)))
+ || !MEM_P (SET_SRC (XVECEXP (op, 0, offs))))
+ return false;
+
+ /* Check a possible post-inc indicator. */
+ if (GET_CODE (SET_SRC (XVECEXP (op, 0, offs + 1))) == PLUS)
{
- rtx tem = XEXP (op, 0);
-
- if (GET_CODE (tem) != MEM)
- return 0;
-
- tem = XEXP (tem, 0);
- if (mode == SImode
- && (register_operand (tem, SImode)
- || (GET_CODE (tem) == POST_INC
- && register_operand (XEXP (tem, 0), SImode))))
- return 1;
- else
- return 0;
+ rtx reg = XEXP (SET_SRC (XVECEXP (op, 0, offs + 1)), 0);
+ rtx inc = XEXP (SET_SRC (XVECEXP (op, 0, offs + 1)), 1);
+
+ reg_count--;
+
+ if (reg_count == 1
+ || !REG_P (reg)
+ || !REG_P (SET_DEST (XVECEXP (op, 0, offs + 1)))
+ || REGNO (reg) != REGNO (SET_DEST (XVECEXP (op, 0, offs + 1)))
+ || !CONST_INT_P (inc)
+ || INTVAL (inc) != (HOST_WIDE_INT) reg_count * 4)
+ return false;
+ i = offs + 2;
}
+ else
+ i = offs + 1;
- return 0;
-}
-
-/* This is similar to cris_bdap_operand:
- It checks a part of an address, the one that is not a plain register
- for an addressing mode using BDAP *or* BIAP.
- Allowed operands is either:
- a) a register
- b) a CONST operand (but not a symbol when generating PIC)
- c) a mult of (1, 2 or 4) and a register
- d) a [r] or [r+] in SImode, or sign-extend from HI or QI. */
-
-int
-cris_bdap_biap_operand (rtx op, enum machine_mode mode)
-{
- register enum rtx_code code = GET_CODE (op);
- rtx reg;
- rtx val;
-
- /* Check for bdap operand. */
- if (cris_bdap_operand (op, mode))
- return 1;
+ /* FIXME: These two only for pre-v32. */
+ regno_dir = -1;
+ regno = reg_count - 1;
- if (mode != SImode && (mode != VOIDmode || GET_MODE (op) != VOIDmode))
- return 0;
+ elt = XVECEXP (op, 0, offs);
+ src_addr = XEXP (SET_SRC (elt), 0);
- /* Check that we're looking at a BIAP operand. */
- if (code != MULT)
- return 0;
+ if (GET_CODE (elt) != SET
+ || !REG_P (SET_DEST (elt))
+ || GET_MODE (SET_DEST (elt)) != SImode
+ || REGNO (SET_DEST (elt)) != regno
+ || !MEM_P (SET_SRC (elt))
+ || GET_MODE (SET_SRC (elt)) != SImode
+ || !memory_address_p (SImode, src_addr))
+ return false;
- /* Canonicalize register and multiplicand. */
- if (GET_CODE (XEXP (op, 0)) == CONST_INT)
- {
- val = XEXP (op, 0);
- reg = XEXP (op, 1);
- }
- else
+ for (setno = 1; i < XVECLEN (op, 0); setno++, i++)
{
- val = XEXP (op, 1);
- reg = XEXP (op, 0);
+ rtx elt = XVECEXP (op, 0, i);
+ regno += regno_dir;
+
+ if (GET_CODE (elt) != SET
+ || !REG_P (SET_DEST (elt))
+ || GET_MODE (SET_DEST (elt)) != SImode
+ || REGNO (SET_DEST (elt)) != regno
+ || !MEM_P (SET_SRC (elt))
+ || GET_MODE (SET_SRC (elt)) != SImode
+ || GET_CODE (XEXP (SET_SRC (elt), 0)) != PLUS
+ || ! rtx_equal_p (XEXP (XEXP (SET_SRC (elt), 0), 0), src_addr)
+ || !CONST_INT_P (XEXP (XEXP (SET_SRC (elt), 0), 1))
+ || INTVAL (XEXP (XEXP (SET_SRC (elt), 0), 1)) != setno * 4)
+ return false;
}
- /* Check that the operands are correct after canonicalization. */
- if (! register_operand (reg, SImode) || GET_CODE (val) != CONST_INT)
- return 0;
-
- /* Check that the multiplicand has a valid value. */
- if ((code == MULT
- && (INTVAL (val) == 1 || INTVAL (val) == 2 || INTVAL (val) == 4)))
- return 1;
-
- return 0;
-}
-
-/* Check if MODE is same as mode for X, and X is PLUS, MINUS, IOR or
- AND or UMIN. */
-
-int
-cris_orthogonal_operator (rtx x, enum machine_mode mode)
-{
- enum rtx_code code = GET_CODE (x);
-
- if (mode == VOIDmode)
- mode = GET_MODE (x);
-
- return (GET_MODE (x) == mode
- && (code == PLUS || code == MINUS
- || code == IOR || code == AND || code == UMIN));
-}
-
-/* Check if MODE is same as mode for X, and X is PLUS, IOR or AND or
- UMIN. */
-
-int
-cris_commutative_orth_op (rtx x, enum machine_mode mode)
-{
- enum rtx_code code = GET_CODE (x);
-
- if (mode == VOIDmode)
- mode = GET_MODE (x);
-
- return (GET_MODE (x) == mode &&
- (code == PLUS
- || code == IOR || code == AND || code == UMIN));
-}
-
-/* Check if MODE is same as mode for X, and X is PLUS or MINUS or UMIN.
- By the name, you might think we should include MULT. We don't because
- it doesn't accept the same addressing modes as the others (ony
- registers) and there's also the problem of handling TARGET_MUL_BUG. */
-
-int
-cris_operand_extend_operator (rtx x, enum machine_mode mode)
-{
- enum rtx_code code = GET_CODE (x);
-
- if (mode == VOIDmode)
- mode = GET_MODE (x);
-
- return (GET_MODE (x) == mode
- && (code == PLUS || code == MINUS || code == UMIN));
-}
-
-/* Check if MODE is same as mode for X, and X is PLUS or MINUS. */
-
-int
-cris_additive_operand_extend_operator (rtx x, enum machine_mode mode)
-{
- enum rtx_code code = GET_CODE (x);
-
- if (mode == VOIDmode)
- mode = GET_MODE (x);
-
- return (GET_MODE (x) == mode
- && (code == PLUS || code == MINUS));
-}
-
-/* Check to see if MODE is same as mode for X, and X is SIGN_EXTEND or
- ZERO_EXTEND. */
-
-int
-cris_extend_operator (rtx x, enum machine_mode mode)
-{
- enum rtx_code code = GET_CODE (x);
-
- if (mode == VOIDmode)
- mode = GET_MODE (x);
-
- return
- (GET_MODE (x) == mode && (code == SIGN_EXTEND || code == ZERO_EXTEND));
-}
-
-/* Check to see if MODE is same as mode for X, and X is PLUS or BOUND. */
-
-int
-cris_plus_or_bound_operator (rtx x, enum machine_mode mode)
-{
- enum rtx_code code = GET_CODE (x);
-
- if (mode == VOIDmode)
- mode = GET_MODE (x);
-
- return
- (GET_MODE (x) == mode && (code == UMIN || code == PLUS));
+ return true;
}
-/* Used as an operator to get a handle on a already-known-valid MEM rtx:es
- (no need to validate the address), where some address expression parts
- have their own match_operand. */
+/* Worker function for predicate for the parallel contents in a movem
+ to-memory. */
-int
-cris_mem_op (rtx x, enum machine_mode mode)
+bool
+cris_store_multiple_op_p (rtx op)
{
- if (mode == VOIDmode)
- mode = GET_MODE (x);
-
- return GET_MODE (x) == mode && GET_CODE (x) == MEM;
-}
+ int reg_count = XVECLEN (op, 0);
+ rtx dest;
+ rtx dest_addr;
+ rtx dest_base;
+ int i;
+ rtx elt;
+ int setno;
+ int regno_dir = 1;
+ int regno = 0;
+ int offset = 0;
-/* Since with -fPIC, not all symbols are valid PIC symbols or indeed
- general_operands, we have to have a predicate that matches it for the
- "movsi" expander. */
+ /* Perform a quick check so we don't blow up below. FIXME: Adjust for
+ other than (MEM reg) and (MEM (PLUS reg const)). */
+ if (reg_count <= 1)
+ return false;
-int
-cris_general_operand_or_symbol (rtx op, enum machine_mode mode)
-{
- return general_operand (op, mode)
- || (CONSTANT_P (op) && cris_symbol (op));
-}
+ elt = XVECEXP (op, 0, 0);
-/* Since a PIC symbol without a GOT entry is not a general_operand, we
- have to have a predicate that matches it. We use this in the expanded
- "movsi" anonymous pattern for PIC symbols. */
+ if (GET_CODE (elt) != SET)
+ return false;
-int
-cris_general_operand_or_gotless_symbol (rtx op, enum machine_mode mode)
-{
- return general_operand (op, mode)
- || (CONSTANT_P (op) && cris_gotless_symbol (op));
-}
+ dest = SET_DEST (elt);
-/* Since a PLT symbol is not a general_operand, we have to have a
- predicate that matches it when we need it. We use this in the expanded
- "call" and "call_value" anonymous patterns. */
+ if (!REG_P (SET_SRC (elt)) || !MEM_P (dest))
+ return false;
-int
-cris_general_operand_or_plt_symbol (rtx op, enum machine_mode mode)
-{
- return general_operand (op, mode)
- || (GET_CODE (op) == CONST
- && GET_CODE (XEXP (op, 0)) == UNSPEC
- && !TARGET_AVOID_GOTPLT);
-}
+ dest_addr = XEXP (dest, 0);
-/* This matches a (MEM (general_operand)) or
- (MEM (cris_general_operand_or_symbol)). The second one isn't a valid
- memory_operand, so we need this predicate to recognize call
- destinations before we change them to a PLT operand (by wrapping in
- UNSPEC 0). */
+ /* Check a possible post-inc indicator. */
+ if (GET_CODE (SET_SRC (XVECEXP (op, 0, 1))) == PLUS)
+ {
+ rtx reg = XEXP (SET_SRC (XVECEXP (op, 0, 1)), 0);
+ rtx inc = XEXP (SET_SRC (XVECEXP (op, 0, 1)), 1);
+
+ reg_count--;
+
+ if (reg_count == 1
+ || !REG_P (reg)
+ || !REG_P (SET_DEST (XVECEXP (op, 0, 1)))
+ || REGNO (reg) != REGNO (SET_DEST (XVECEXP (op, 0, 1)))
+ || !CONST_INT_P (inc)
+ /* Support increment by number of registers, and by the offset
+ of the destination, if it has the form (MEM (PLUS reg
+ offset)). */
+ || !((REG_P (dest_addr)
+ && REGNO (dest_addr) == REGNO (reg)
+ && INTVAL (inc) == (HOST_WIDE_INT) reg_count * 4)
+ || (GET_CODE (dest_addr) == PLUS
+ && REG_P (XEXP (dest_addr, 0))
+ && REGNO (XEXP (dest_addr, 0)) == REGNO (reg)
+ && CONST_INT_P (XEXP (dest_addr, 1))
+ && INTVAL (XEXP (dest_addr, 1)) == INTVAL (inc))))
+ return false;
+
+ i = 2;
+ }
+ else
+ i = 1;
-int
-cris_mem_call_operand (rtx op, enum machine_mode mode)
-{
- rtx xmem;
+ /* FIXME: These two only for pre-v32. */
+ regno_dir = -1;
+ regno = reg_count - 1;
- if (GET_CODE (op) != MEM)
- return 0;
+ if (GET_CODE (elt) != SET
+ || !REG_P (SET_SRC (elt))
+ || GET_MODE (SET_SRC (elt)) != SImode
+ || REGNO (SET_SRC (elt)) != (unsigned int) regno
+ || !MEM_P (SET_DEST (elt))
+ || GET_MODE (SET_DEST (elt)) != SImode)
+ return false;
- if (memory_operand (op, mode))
- return 1;
+ if (REG_P (dest_addr))
+ {
+ dest_base = dest_addr;
+ offset = 0;
+ }
+ else if (GET_CODE (dest_addr) == PLUS
+ && REG_P (XEXP (dest_addr, 0))
+ && CONST_INT_P (XEXP (dest_addr, 1)))
+ {
+ dest_base = XEXP (dest_addr, 0);
+ offset = INTVAL (XEXP (dest_addr, 1));
+ }
+ else
+ return false;
- xmem = XEXP (op, 0);
+ for (setno = 1; i < XVECLEN (op, 0); setno++, i++)
+ {
+ rtx elt = XVECEXP (op, 0, i);
+ regno += regno_dir;
+
+ if (GET_CODE (elt) != SET
+ || !REG_P (SET_SRC (elt))
+ || GET_MODE (SET_SRC (elt)) != SImode
+ || REGNO (SET_SRC (elt)) != (unsigned int) regno
+ || !MEM_P (SET_DEST (elt))
+ || GET_MODE (SET_DEST (elt)) != SImode
+ || GET_CODE (XEXP (SET_DEST (elt), 0)) != PLUS
+ || ! rtx_equal_p (XEXP (XEXP (SET_DEST (elt), 0), 0), dest_base)
+ || !CONST_INT_P (XEXP (XEXP (SET_DEST (elt), 0), 1))
+ || INTVAL (XEXP (XEXP (SET_DEST (elt), 0), 1)) != setno * 4 + offset)
+ return false;
+ }
- return cris_general_operand_or_symbol (xmem, GET_MODE (op));
+ return true;
}
/* The CONDITIONAL_REGISTER_USAGE worker. */
if (flag_pic)
fixed_regs[PIC_OFFSET_TABLE_REGNUM]
= call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1;
+
+ if (TARGET_HAS_MUL_INSNS)
+ fixed_regs[CRIS_MOF_REGNUM] = 0;
+
+ /* On early versions, we must use the 16-bit condition-code register,
+ which has another name. */
+ if (cris_cpu_version < 8)
+ reg_names[CRIS_CC0_REGNUM] = "ccr";
}
/* Return current_function_uses_pic_offset_table. For use in cris.md,
an operator, for immediate output. If that ever happens for
MULT, we need to apply TARGET_MUL_BUG in the caller. Make sure
we notice. */
- abort ();
+ internal_error ("MULT case in cris_op_str");
break;
case DIV:
break;
case UMIN:
- /* Used to control the sign/zero-extend character for the 'e' modifier.
+ /* Used to control the sign/zero-extend character for the 'E' modifier.
BOUND has none. */
cris_output_insn_is_bound = 1;
return "bound";
static void
cris_print_index (rtx index, FILE *file)
{
- rtx inner = XEXP (index, 0);
-
/* Make the index "additive" unless we'll output a negative number, in
which case the sign character is free (as in free beer). */
- if (GET_CODE (index) != CONST_INT || INTVAL (index) >= 0)
+ if (!CONST_INT_P (index) || INTVAL (index) >= 0)
putc ('+', file);
if (REG_P (index))
putc (INTVAL (XEXP (index, 1)) == 2 ? 'w' : 'd', file);
}
- else if (GET_CODE (index) == SIGN_EXTEND &&
- GET_CODE (inner) == MEM)
+ else if (GET_CODE (index) == SIGN_EXTEND && MEM_P (XEXP (index, 0)))
{
+ rtx inner = XEXP (index, 0);
rtx inner_inner = XEXP (inner, 0);
if (GET_CODE (inner_inner) == POST_INC)
putc (GET_MODE (inner) == HImode ? 'w' : 'b', file);
}
}
- else if (GET_CODE (index) == MEM)
+ else if (MEM_P (index))
{
+ rtx inner = XEXP (index, 0);
if (GET_CODE (inner) == POST_INC)
fprintf (file, "[$%s+].d", reg_names[REGNO (XEXP (inner, 0))]);
else
return 0;
}
-/* Textual function prologue. */
+/* Return nonzero if REGNO is an ordinary register that *needs* to be
+ saved together with other registers, possibly by a MOVEM instruction,
+ or is saved for target-independent reasons. There may be
+ target-dependent reasons to save the register anyway; this is just a
+ wrapper for a complicated conditional. */
-static void
-cris_target_asm_function_prologue (FILE *file, HOST_WIDE_INT size)
+static int
+cris_reg_saved_in_regsave_area (unsigned int regno, bool got_really_used)
{
- int regno;
-
- /* Shorten the used name for readability. */
- int cfoa_size = current_function_outgoing_args_size;
- int last_movem_reg = -1;
- int doing_dwarf = dwarf2out_do_frame ();
- int framesize;
- int faked_args_size = 0;
- int cfa_write_offset = 0;
- char *cfa_label = NULL;
- int return_address_on_stack
- = regs_ever_live[CRIS_SRP_REGNUM]
- || cfun->machine->needs_return_address_on_stack != 0;
-
- /* Don't do anything if no prologues or epilogues are wanted. */
- if (!TARGET_PROLOGUE_EPILOGUE)
- return;
-
- if (size < 0)
- abort ();
-
- /* Align the size to what's best for the CPU model. */
- if (TARGET_STACK_ALIGN)
- size = TARGET_ALIGN_BY_32 ? (size + 3) & ~3 : (size + 1) & ~1;
-
- if (current_function_pretend_args_size)
- {
- int pretend = current_function_pretend_args_size;
- for (regno = CRIS_FIRST_ARG_REG + CRIS_MAX_ARGS_IN_REGS - 1;
- pretend > 0;
- regno--, pretend -= 4)
- {
- fprintf (file, "\tpush $%s\n", reg_names[regno]);
- faked_args_size += 4;
- }
- }
-
- framesize = faked_args_size;
-
- if (doing_dwarf)
- {
- /* FIXME: Slightly redundant calculation, as we do the same in
- pieces below. This offset must be the total adjustment of the
- stack-pointer. We can then def_cfa call at the end of this
- function with the current implementation of execute_cfa_insn, but
- that wouldn't really be clean. */
-
- int cfa_offset
- = faked_args_size
- + (return_address_on_stack ? 4 : 0)
- + (frame_pointer_needed ? 4 : 0);
-
- int cfa_reg;
-
- if (frame_pointer_needed)
- cfa_reg = FRAME_POINTER_REGNUM;
- else
- {
- cfa_reg = STACK_POINTER_REGNUM;
- cfa_offset += cris_initial_frame_pointer_offset ();
- }
-
- cfa_label = dwarf2out_cfi_label ();
- dwarf2out_def_cfa (cfa_label, cfa_reg, cfa_offset);
-
- cfa_write_offset = - faked_args_size - 4;
- }
-
- /* Save SRP if not a leaf function. */
- if (return_address_on_stack)
- {
- fprintf (file, "\tPush $srp\n");
- framesize += 4;
-
- if (doing_dwarf)
- {
- dwarf2out_return_save (cfa_label, cfa_write_offset);
- cfa_write_offset -= 4;
- }
- }
-
- /* Set up frame pointer if needed. */
- if (frame_pointer_needed)
- {
- fprintf (file, "\tpush $%s\n\tmove.d $sp,$%s\n",
- reg_names[FRAME_POINTER_REGNUM],
- reg_names[FRAME_POINTER_REGNUM]);
- framesize += 4;
-
- if (doing_dwarf)
- {
- dwarf2out_reg_save (cfa_label, FRAME_POINTER_REGNUM,
- cfa_write_offset);
- cfa_write_offset -= 4;
- }
- }
-
- /* Local vars are located above saved regs. */
- cfa_write_offset -= size;
-
- /* Get a contiguous sequence of registers, starting with r0, that need
- to be saved. */
- for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
- {
- if ((((regs_ever_live[regno]
- && !call_used_regs[regno])
- || (regno == (int) PIC_OFFSET_TABLE_REGNUM
- && (current_function_uses_pic_offset_table
- /* It is saved anyway, if there would be a gap. */
- || (flag_pic
- && regs_ever_live[regno + 1]
- && !call_used_regs[regno + 1]))))
- && (regno != FRAME_POINTER_REGNUM || !frame_pointer_needed)
- && regno != CRIS_SRP_REGNUM)
- || (current_function_calls_eh_return
- && (regno == EH_RETURN_DATA_REGNO (0)
- || regno == EH_RETURN_DATA_REGNO (1)
- || regno == EH_RETURN_DATA_REGNO (2)
- || regno == EH_RETURN_DATA_REGNO (3))))
- {
- /* Check if movem may be used for registers so far. */
- if (regno == last_movem_reg + 1)
- /* Yes, update next expected register. */
- last_movem_reg++;
- else
- {
- /* We cannot use movem for all registers. We have to flush
- any movem:ed registers we got so far. */
- if (last_movem_reg != -1)
- {
- /* It is a win to use a side-effect assignment for
- 64 <= size <= 128. But side-effect on movem was
- not usable for CRIS v0..3. Also only do it if
- side-effects insns are allowed. */
- if ((last_movem_reg + 1) * 4 + size >= 64
- && (last_movem_reg + 1) * 4 + size <= 128
- && cris_cpu_version >= CRIS_CPU_SVINTO
- && TARGET_SIDE_EFFECT_PREFIXES)
- fprintf (file, "\tmovem $%s,[$sp=$sp-"HOST_WIDE_INT_PRINT_DEC"]\n",
- reg_names[last_movem_reg],
- (last_movem_reg + 1) * 4 + size);
- else
- {
- /* Avoid printing multiple subsequent sub:s for sp. */
- fprintf (file, "\tsub%s "HOST_WIDE_INT_PRINT_DEC",$sp\n",
- ADDITIVE_SIZE_MODIFIER ((last_movem_reg + 1)
- * 4 + size),
- (last_movem_reg + 1) * 4 + size);
-
- fprintf (file, "\tmovem $%s,[$sp]\n",
- reg_names[last_movem_reg]);
- }
-
- framesize += (last_movem_reg + 1) * 4 + size;
-
- if (TARGET_PDEBUG)
- fprintf (file, "; frame "HOST_WIDE_INT_PRINT_DEC
- ", #regs %d, bytes %d args %d\n",
- size,
- last_movem_reg + 1,
- (last_movem_reg + 1) * 4,
- current_function_args_size);
-
- last_movem_reg = -1;
- size = 0;
- }
- else if (size > 0)
- {
- /* Local vars on stack, but there are no movem:s.
- Just allocate space. */
- fprintf (file, "\tSub%s "HOST_WIDE_INT_PRINT_DEC",$sp\n",
- ADDITIVE_SIZE_MODIFIER (size),
- size);
- framesize += size;
- size = 0;
- }
-
- fprintf (file, "\tPush $%s\n", reg_names[regno]);
- framesize += 4;
- }
-
- if (doing_dwarf)
- {
- /* Registers are stored lowest numbered at highest address,
- which matches the loop order; we just need to update the
- write-offset. */
- dwarf2out_reg_save (cfa_label, regno, cfa_write_offset);
- cfa_write_offset -= 4;
- }
- }
- }
-
- /* Check after, if we can movem all registers. This is the normal
- case. */
- if (last_movem_reg != -1)
- {
- /* Side-effect assignment on movem was not supported for CRIS v0..3,
- and don't do it if we're asked not to.
-
- The movem is already accounted for, for unwind. */
-
- if ((last_movem_reg + 1) * 4 + size >= 64
- && (last_movem_reg + 1) * 4 + size <= 128
- && cris_cpu_version >= CRIS_CPU_SVINTO
- && TARGET_SIDE_EFFECT_PREFIXES)
- fprintf (file, "\tmovem $%s,[$sp=$sp-"HOST_WIDE_INT_PRINT_DEC"]\n",
- reg_names[last_movem_reg],
- (last_movem_reg+1) * 4 + size);
- else
- {
- /* Avoid printing multiple subsequent sub:s for sp. FIXME:
- Clean up the conditional expression. */
- fprintf (file, "\tsub%s "HOST_WIDE_INT_PRINT_DEC",$sp\n",
- ADDITIVE_SIZE_MODIFIER ((last_movem_reg + 1) * 4 + size),
- (last_movem_reg + 1) * 4 + size);
- /* To be compatible with v0..v3 means we do not use an assignment
- addressing mode with movem. We normally don't need that
- anyway. It would only be slightly more efficient for 64..128
- bytes frame size. */
- fprintf (file, "\tmovem $%s,[$sp]\n", reg_names[last_movem_reg]);
- }
-
- framesize += (last_movem_reg + 1) * 4 + size;
-
- if (TARGET_PDEBUG)
- fprintf (file, "; frame "HOST_WIDE_INT_PRINT_DEC
- ", #regs %d, bytes %d args %d\n",
- size,
- last_movem_reg + 1,
- (last_movem_reg + 1) * 4,
- current_function_args_size);
-
- /* We have to put outgoing argument space after regs. */
- if (cfoa_size)
- {
- /* This does not need to be accounted for, for unwind. */
-
- fprintf (file, "\tSub%s %d,$sp\n",
- ADDITIVE_SIZE_MODIFIER (cfoa_size),
- cfoa_size);
- framesize += cfoa_size;
- }
- }
- else if ((size + cfoa_size) > 0)
- {
- /* This does not need to be accounted for, for unwind. */
-
- /* Local vars on stack, and we could not use movem. Add a sub here. */
- fprintf (file, "\tSub%s "HOST_WIDE_INT_PRINT_DEC",$sp\n",
- ADDITIVE_SIZE_MODIFIER (size + cfoa_size),
- cfoa_size + size);
- framesize += size + cfoa_size;
- }
-
- /* Set up the PIC register. */
- if (current_function_uses_pic_offset_table)
- fprintf (file, "\tmove.d $pc,$%s\n\tsub.d .:GOTOFF,$%s\n",
- reg_names[PIC_OFFSET_TABLE_REGNUM],
- reg_names[PIC_OFFSET_TABLE_REGNUM]);
-
- if (TARGET_PDEBUG)
- fprintf (file,
- "; parm #%d @ %d; frame " HOST_WIDE_INT_PRINT_DEC
- ", FP-SP is %d; leaf: %s%s; fp %s, outg: %d arg %d\n",
- CRIS_MAX_ARGS_IN_REGS + 1, FIRST_PARM_OFFSET (0),
- get_frame_size (),
- cris_initial_frame_pointer_offset (),
- leaf_function_p () ? "yes" : "no",
- return_address_on_stack ? "no" :"yes",
- frame_pointer_needed ? "yes" : "no",
- cfoa_size, current_function_args_size);
-
- if (cris_max_stackframe && framesize > cris_max_stackframe)
- warning ("stackframe too big: %d bytes", framesize);
+ return
+ (((df_regs_ever_live_p (regno)
+ && !call_used_regs[regno])
+ || (regno == PIC_OFFSET_TABLE_REGNUM
+ && (got_really_used
+ /* It is saved anyway, if there would be a gap. */
+ || (flag_pic
+ && df_regs_ever_live_p (regno + 1)
+ && !call_used_regs[regno + 1]))))
+ && (regno != FRAME_POINTER_REGNUM || !frame_pointer_needed)
+ && regno != CRIS_SRP_REGNUM)
+ || (current_function_calls_eh_return
+ && (regno == EH_RETURN_DATA_REGNO (0)
+ || regno == EH_RETURN_DATA_REGNO (1)
+ || regno == EH_RETURN_DATA_REGNO (2)
+ || regno == EH_RETURN_DATA_REGNO (3)));
}
/* Return nonzero if there are regs mentioned in the insn that are not all
return 0;
}
-/* Figure out if the insn may be put in the epilogue. */
+/* The PRINT_OPERAND worker. */
-int
-cris_eligible_for_epilogue_delay (rtx insn)
+void
+cris_print_operand (FILE *file, rtx x, int code)
{
- /* First of all, it must be as slottable as for a delayed branch insn. */
- if (get_attr_slottable (insn) != SLOTTABLE_YES)
- return 0;
-
- /* It must not refer to the stack pointer (may be valid for some cases
- that I can't think of). */
- if (reg_mentioned_p (stack_pointer_rtx, PATTERN (insn)))
- return 0;
-
- /* The frame pointer will be restored in the epilogue, before the
- "ret", so it can't be referred to. */
- if (frame_pointer_needed
- && reg_mentioned_p (frame_pointer_rtx, PATTERN (insn)))
- return 0;
-
- /* All saved regs are restored before the delayed insn.
- This means that we cannot have any instructions that mention the
- registers that are restored by the epilogue. */
- if (saved_regs_mentioned (PATTERN (insn)))
- return 0;
-
- /* It seems to be ok. */
- return 1;
-}
-
-/* Return the number of delay-slots in the epilogue: return 1 if it
- contains "ret", else 0. */
-
-int
-cris_delay_slots_for_epilogue (void)
-{
- /* Check if we use a return insn, which we only do for leaf functions.
- Else there is no slot to fill. */
- if (regs_ever_live[CRIS_SRP_REGNUM]
- || cfun->machine->needs_return_address_on_stack != 0)
- return 0;
-
- /* By calling function_epilogue with the same parameters as from gcc
- we can get info about if the epilogue can fill the delay-slot by itself.
- If it is filled from the epilogue, then the corresponding string
- is in save_last.
- This depends on that the "size" argument to function_epilogue
- always is get_frame_size.
- FIXME: Kludgy. At least make it a separate function that is not
- misnamed or abuses the stream parameter. */
- cris_target_asm_function_epilogue (NULL, get_frame_size ());
-
- if (*save_last)
- return 1;
- return 0;
-}
-
-/* Textual function epilogue. When file is NULL, it serves doubly as
- a test for whether the epilogue can fill any "ret" delay-slots by
- itself by storing the delay insn in save_last. */
-
-static void
-cris_target_asm_function_epilogue (FILE *file, HOST_WIDE_INT size)
-{
- int regno;
- int last_movem_reg = -1;
- rtx insn = get_last_insn ();
- int argspace_offset = current_function_outgoing_args_size;
- int pretend = current_function_pretend_args_size;
- int return_address_on_stack
- = regs_ever_live[CRIS_SRP_REGNUM]
- || cfun->machine->needs_return_address_on_stack != 0;
-
- save_last[0] = 0;
-
- if (file && !TARGET_PROLOGUE_EPILOGUE)
- return;
-
- if (TARGET_PDEBUG && file)
- fprintf (file, ";;\n");
-
- /* Align byte count of stack frame. */
- if (TARGET_STACK_ALIGN)
- size = TARGET_ALIGN_BY_32 ? (size + 3) & ~3 : (size + 1) & ~1;
-
- /* If the last insn was a BARRIER, we don't have to write any code,
- then all returns were covered by "return" insns. */
- if (GET_CODE (insn) == NOTE)
- insn = prev_nonnote_insn (insn);
- if (insn
- && (GET_CODE (insn) == BARRIER
- /* We must make sure that the insn really is a "return" and
- not a conditional branch. Try to match the return exactly,
- and if it doesn't match, assume it is a conditional branch
- (and output an epilogue). */
- || (GET_CODE (insn) == JUMP_INSN
- && GET_CODE (PATTERN (insn)) == RETURN)))
- {
- if (TARGET_PDEBUG && file)
- fprintf (file, ";;;;;\n");
- return;
- }
-
- /* Check how many saved regs we can movem. They start at r0 and must
- be contiguous. */
- for (regno = 0;
- regno < FIRST_PSEUDO_REGISTER;
- regno++)
- if ((((regs_ever_live[regno]
- && !call_used_regs[regno])
- || (regno == (int) PIC_OFFSET_TABLE_REGNUM
- && (current_function_uses_pic_offset_table
- /* It is saved anyway, if there would be a gap. */
- || (flag_pic
- && regs_ever_live[regno + 1]
- && !call_used_regs[regno + 1]))))
- && (regno != FRAME_POINTER_REGNUM || !frame_pointer_needed)
- && regno != CRIS_SRP_REGNUM)
- || (current_function_calls_eh_return
- && (regno == EH_RETURN_DATA_REGNO (0)
- || regno == EH_RETURN_DATA_REGNO (1)
- || regno == EH_RETURN_DATA_REGNO (2)
- || regno == EH_RETURN_DATA_REGNO (3))))
-
- {
- if (regno == last_movem_reg + 1)
- last_movem_reg++;
- else
- break;
- }
-
- for (regno = FIRST_PSEUDO_REGISTER - 1;
- regno > last_movem_reg;
- regno--)
- if ((((regs_ever_live[regno]
- && !call_used_regs[regno])
- || (regno == (int) PIC_OFFSET_TABLE_REGNUM
- && (current_function_uses_pic_offset_table
- /* It is saved anyway, if there would be a gap. */
- || (flag_pic
- && regs_ever_live[regno + 1]
- && !call_used_regs[regno + 1]))))
- && (regno != FRAME_POINTER_REGNUM || !frame_pointer_needed)
- && regno != CRIS_SRP_REGNUM)
- || (current_function_calls_eh_return
- && (regno == EH_RETURN_DATA_REGNO (0)
- || regno == EH_RETURN_DATA_REGNO (1)
- || regno == EH_RETURN_DATA_REGNO (2)
- || regno == EH_RETURN_DATA_REGNO (3))))
- {
- if (argspace_offset)
- {
- /* There is an area for outgoing parameters located before
- the saved registers. We have to adjust for that. */
- if (file)
- fprintf (file, "\tAdd%s %d,$sp\n",
- ADDITIVE_SIZE_MODIFIER (argspace_offset),
- argspace_offset);
-
- /* Make sure we only do this once. */
- argspace_offset = 0;
- }
-
- /* Flush previous non-movem:ed registers. */
- if (*save_last && file)
- fprintf (file, save_last);
- sprintf (save_last, "\tPop $%s\n", reg_names[regno]);
- }
-
- if (last_movem_reg != -1)
- {
- if (argspace_offset)
- {
- /* Adjust for the outgoing parameters area, if that's not
- handled yet. */
- if (*save_last && file)
- {
- fprintf (file, save_last);
- *save_last = 0;
- }
-
- if (file)
- fprintf (file, "\tAdd%s %d,$sp\n",
- ADDITIVE_SIZE_MODIFIER (argspace_offset),
- argspace_offset);
- argspace_offset = 0;
- }
- /* Flush previous non-movem:ed registers. */
- else if (*save_last && file)
- fprintf (file, save_last);
- sprintf (save_last, "\tmovem [$sp+],$%s\n", reg_names[last_movem_reg]);
- }
-
- /* Restore frame pointer if necessary. */
- if (frame_pointer_needed)
- {
- if (*save_last && file)
- fprintf (file, save_last);
-
- if (file)
- fprintf (file, "\tmove.d $%s,$sp\n",
- reg_names[FRAME_POINTER_REGNUM]);
- sprintf (save_last, "\tPop $%s\n",
- reg_names[FRAME_POINTER_REGNUM]);
- }
- else
- {
- /* If there was no frame-pointer to restore sp from, we must
- explicitly deallocate local variables. */
-
- /* Handle space for outgoing parameters that hasn't been handled
- yet. */
- size += argspace_offset;
-
- if (size)
- {
- if (*save_last && file)
- fprintf (file, save_last);
-
- sprintf (save_last, "\tadd%s "HOST_WIDE_INT_PRINT_DEC",$sp\n",
- ADDITIVE_SIZE_MODIFIER (size), size);
- }
-
- /* If the size was not in the range for a "quick", we must flush
- it here. */
- if (size > 63)
- {
- if (file)
- fprintf (file, save_last);
- *save_last = 0;
- }
- }
-
- /* If this function has no pushed register parameters
- (stdargs/varargs), and if it is not a leaf function, then we can
- just jump-return here. */
- if (return_address_on_stack && pretend == 0)
- {
- if (*save_last && file)
- fprintf (file, save_last);
- *save_last = 0;
-
- if (file)
- {
- if (current_function_calls_eh_return)
- {
- /* The installed EH-return address is in *this* frame, so we
- need to pop it before we return. */
- fprintf (file, "\tpop $srp\n");
- fprintf (file, "\tret\n");
- fprintf (file, "\tadd.d $%s,$sp\n", reg_names[CRIS_STACKADJ_REG]);
- }
- else
- fprintf (file, "\tJump [$sp+]\n");
-
- /* Do a sanity check to avoid generating invalid code. */
- if (current_function_epilogue_delay_list)
- internal_error ("allocated but unused delay list in epilogue");
- }
- return;
- }
-
- /* Rather than add current_function_calls_eh_return conditions
- everywhere in the following code (and not be able to test it
- thoroughly), assert the assumption that all usage of
- __builtin_eh_return are handled above. */
- if (current_function_calls_eh_return)
- internal_error ("unexpected function type needing stack adjustment for\
- __builtin_eh_return");
-
- /* If we pushed some register parameters, then adjust the stack for
- them. */
- if (pretend)
- {
- /* Since srp is stored on the way, we need to restore it first. */
- if (return_address_on_stack)
- {
- if (*save_last && file)
- fprintf (file, save_last);
- *save_last = 0;
-
- if (file)
- fprintf (file, "\tpop $srp\n");
- }
-
- if (*save_last && file)
- fprintf (file, save_last);
-
- sprintf (save_last, "\tadd%s %d,$sp\n",
- ADDITIVE_SIZE_MODIFIER (pretend), pretend);
- }
-
- /* Here's where we have a delay-slot we need to fill. */
- if (file && current_function_epilogue_delay_list)
- {
- /* If gcc has allocated an insn for the epilogue delay slot, but
- things were arranged so we now thought we could do it
- ourselves, don't forget to flush that insn. */
- if (*save_last)
- fprintf (file, save_last);
-
- fprintf (file, "\tRet\n");
-
- /* Output the delay-slot-insn the mandated way. */
- final_scan_insn (XEXP (current_function_epilogue_delay_list, 0),
- file, 1, -2, 1, NULL);
- }
- else if (file)
- {
- fprintf (file, "\tRet\n");
-
- /* If the GCC did not do it, we have to use whatever insn we have,
- or a nop. */
- if (*save_last)
- fprintf (file, save_last);
- else
- fprintf (file, "\tnOp\n");
- }
-}
-
-/* The PRINT_OPERAND worker. */
-
-void
-cris_print_operand (FILE *file, rtx x, int code)
-{
- rtx operand = x;
+ rtx operand = x;
/* Size-strings corresponding to MULT expressions. */
static const char *const mults[] = { "BAD:0", ".b", ".w", "BAD:3", ".d" };
case 'b':
/* Print the unsigned supplied integer as if it were signed
and < 0, i.e print 255 or 65535 as -1, 254, 65534 as -2, etc. */
- if (GET_CODE (x) != CONST_INT
+ if (!CONST_INT_P (x)
|| ! CONST_OK_FOR_LETTER_P (INTVAL (x), 'O'))
LOSE_AND_RETURN ("invalid operand for 'b' modifier", x);
fprintf (file, HOST_WIDE_INT_PRINT_DEC,
fprintf (file, "%s", cris_op_str (operand));
return;
- case 'v':
- /* Print the operand without the PIC register. */
- if (! flag_pic || ! CONSTANT_P (x) || ! cris_gotless_symbol (x))
- LOSE_AND_RETURN ("invalid operand for 'v' modifier", x);
- cris_pic_sympart_only++;
- cris_output_addr_const (file, x);
- cris_pic_sympart_only--;
+ case 'o':
+ {
+ /* A movem modifier working on a parallel; output the register
+ name. */
+ int regno;
+
+ if (GET_CODE (x) != PARALLEL)
+ LOSE_AND_RETURN ("invalid operand for 'o' modifier", x);
+
+ /* The second item can be (set reg (plus reg const)) to denote a
+ postincrement. */
+ regno
+ = (GET_CODE (SET_SRC (XVECEXP (x, 0, 1))) == PLUS
+ ? XVECLEN (x, 0) - 2
+ : XVECLEN (x, 0) - 1);
+
+ fprintf (file, "$%s", reg_names [regno]);
+ }
return;
- case 'P':
- /* Print the PIC register. Applied to a GOT-less PIC symbol for
- sanity. */
- if (! flag_pic || ! CONSTANT_P (x) || ! cris_gotless_symbol (x))
- LOSE_AND_RETURN ("invalid operand for 'P' modifier", x);
- fprintf (file, "$%s", reg_names [PIC_OFFSET_TABLE_REGNUM]);
+ case 'O':
+ {
+ /* A similar movem modifier; output the memory operand. */
+ rtx addr;
+
+ if (GET_CODE (x) != PARALLEL)
+ LOSE_AND_RETURN ("invalid operand for 'O' modifier", x);
+
+ /* The lowest mem operand is in the first item, but perhaps it
+ needs to be output as postincremented. */
+ addr = MEM_P (SET_SRC (XVECEXP (x, 0, 0)))
+ ? XEXP (SET_SRC (XVECEXP (x, 0, 0)), 0)
+ : XEXP (SET_DEST (XVECEXP (x, 0, 0)), 0);
+
+ /* The second item can be a (set reg (plus reg const)) to denote
+ a modification. */
+ if (GET_CODE (SET_SRC (XVECEXP (x, 0, 1))) == PLUS)
+ {
+ /* It's a post-increment, if the address is a naked (reg). */
+ if (REG_P (addr))
+ addr = gen_rtx_POST_INC (SImode, addr);
+ else
+ {
+ /* Otherwise, it's a side-effect; RN=RN+M. */
+ fprintf (file, "[$%s=$%s%s%d]",
+ reg_names [REGNO (SET_DEST (XVECEXP (x, 0, 1)))],
+ reg_names [REGNO (XEXP (addr, 0))],
+ INTVAL (XEXP (addr, 1)) < 0 ? "" : "+",
+ (int) INTVAL (XEXP (addr, 1)));
+ return;
+ }
+ }
+ output_address (addr);
+ }
return;
case 'p':
/* Adjust a power of two to its log2. */
- if (GET_CODE (x) != CONST_INT || exact_log2 (INTVAL (x)) < 0 )
+ if (!CONST_INT_P (x) || exact_log2 (INTVAL (x)) < 0 )
LOSE_AND_RETURN ("invalid operand for 'p' modifier", x);
fprintf (file, "%d", exact_log2 (INTVAL (x)));
return;
respectively. This modifier also terminates the inhibiting
effects of the 'x' modifier. */
cris_output_insn_is_bound = 0;
- if (GET_MODE (x) == VOIDmode && GET_CODE (x) == CONST_INT)
+ if (GET_MODE (x) == VOIDmode && CONST_INT_P (x))
{
if (INTVAL (x) >= 0)
{
case 'z':
/* Const_int: print b for -127 <= x <= 255,
- w for -32768 <= x <= 65535, else abort. */
- if (GET_CODE (x) != CONST_INT
+ w for -32768 <= x <= 65535, else die. */
+ if (!CONST_INT_P (x)
|| INTVAL (x) < -32768 || INTVAL (x) > 65535)
LOSE_AND_RETURN ("invalid operand for 'z' modifier", x);
putc (INTVAL (x) >= -128 && INTVAL (x) <= 255 ? 'b' : 'w', file);
: ".p2alignw 5,0x050f,2\n\t", file);
return;
+ case ':':
+ /* The PIC register. */
+ if (! flag_pic)
+ internal_error ("invalid use of ':' modifier");
+ fprintf (file, "$%s", reg_names [PIC_OFFSET_TABLE_REGNUM]);
+ return;
+
case 'H':
/* Print high (most significant) part of something. */
switch (GET_CODE (operand))
{
case CONST_INT:
- if (HOST_BITS_PER_WIDE_INT == 32)
- /* Sign-extension from a normal int to a long long. */
- fprintf (file, INTVAL (operand) < 0 ? "-1" : "0");
- else
- fprintf (file, "0x%x", (unsigned int)(INTVAL (x) >> 31 >> 1));
+ /* If we're having 64-bit HOST_WIDE_INTs, the whole (DImode)
+ value is kept here, and so may be other than 0 or -1. */
+ fprintf (file, HOST_WIDE_INT_PRINT_DEC,
+ INTVAL (operand_subword (operand, 1, 0, DImode)));
return;
case CONST_DOUBLE:
break;
case 'e':
+ /* Like 'E', but ignore state set by 'x'. FIXME: Use code
+ iterators and attributes in cris.md to avoid the need for %x
+ and %E (and %e) and state passed between those modifiers. */
+ cris_output_insn_is_bound = 0;
+ /* FALL THROUGH. */
+ case 'E':
/* Print 's' if operand is SIGN_EXTEND or 'u' if ZERO_EXTEND unless
cris_output_insn_is_bound is nonzero. */
if (GET_CODE (operand) != SIGN_EXTEND
&& GET_CODE (operand) != ZERO_EXTEND
- && GET_CODE (operand) != CONST_INT)
+ && !CONST_INT_P (operand))
LOSE_AND_RETURN ("invalid operand for 'e' modifier", x);
if (cris_output_insn_is_bound)
}
putc (GET_CODE (operand) == SIGN_EXTEND
- || (GET_CODE (operand) == CONST_INT && INTVAL (operand) < 0)
+ || (CONST_INT_P (operand) && INTVAL (operand) < 0)
? 's' : 'u', file);
return;
fprintf (file, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
return;
}
- else if (HOST_BITS_PER_WIDE_INT > 32 && GET_CODE (operand) == CONST_INT)
+ else if (HOST_BITS_PER_WIDE_INT > 32 && CONST_INT_P (operand))
{
fprintf (file, HOST_WIDE_INT_PRINT_HEX,
INTVAL (x) & ((unsigned int) 0x7fffffff * 2 + 1));
case 'A':
/* When emitting an add for the high part of a DImode constant, we
want to use addq for 0 and adds.w for -1. */
- if (GET_CODE (operand) != CONST_INT)
+ if (!CONST_INT_P (operand))
LOSE_AND_RETURN ("invalid operand for 'A' modifier", x);
fprintf (file, INTVAL (operand) < 0 ? "adds.w" : "addq");
return;
+ case 'd':
+ /* If this is a GOT symbol, force it to be emitted as :GOT and
+ :GOTPLT regardless of -fpic (i.e. not as :GOT16, :GOTPLT16).
+ Avoid making this too much of a special case. */
+ if (flag_pic == 1 && CONSTANT_P (operand))
+ {
+ int flag_pic_save = flag_pic;
+
+ flag_pic = 2;
+ cris_output_addr_const (file, operand);
+ flag_pic = flag_pic_save;
+ return;
+ }
+ break;
+
case 'D':
/* When emitting an sub for the high part of a DImode constant, we
want to use subq for 0 and subs.w for -1. */
- if (GET_CODE (operand) != CONST_INT)
+ if (!CONST_INT_P (operand))
LOSE_AND_RETURN ("invalid operand for 'D' modifier", x);
fprintf (file, INTVAL (operand) < 0 ? "subs.w" : "subq");
return;
case 'T':
/* Print the size letter for an operand to a MULT, which must be a
const_int with a suitable value. */
- if (GET_CODE (operand) != CONST_INT || INTVAL (operand) > 4)
+ if (!CONST_INT_P (operand) || INTVAL (operand) > 4)
LOSE_AND_RETURN ("invalid operand for 'T' modifier", x);
fprintf (file, "%s", mults[INTVAL (operand)]);
return;
switch (GET_CODE (operand))
{
case REG:
- if (REGNO (operand) > 15)
+ if (REGNO (operand) > 15
+ && REGNO (operand) != CRIS_MOF_REGNUM
+ && REGNO (operand) != CRIS_SRP_REGNUM
+ && REGNO (operand) != CRIS_CC0_REGNUM)
internal_error ("internal error: bad register: %d", REGNO (operand));
fprintf (file, "$%s", reg_names[REGNO (operand)]);
return;
return;
case UNSPEC:
- ASSERT_PLT_UNSPEC (operand);
/* Fall through. */
-
case CONST:
cris_output_addr_const (file, operand);
return;
case ASHIFT:
{
/* For a (MULT (reg X) const_int) we output "rX.S". */
- int i = GET_CODE (XEXP (operand, 1)) == CONST_INT
+ int i = CONST_INT_P (XEXP (operand, 1))
? INTVAL (XEXP (operand, 1)) : INTVAL (XEXP (operand, 0));
- rtx reg = GET_CODE (XEXP (operand, 1)) == CONST_INT
+ rtx reg = CONST_INT_P (XEXP (operand, 1))
? XEXP (operand, 0) : XEXP (operand, 1);
- if (GET_CODE (reg) != REG
- || (GET_CODE (XEXP (operand, 0)) != CONST_INT
- && GET_CODE (XEXP (operand, 1)) != CONST_INT))
+ if (!REG_P (reg)
+ || (!CONST_INT_P (XEXP (operand, 0))
+ && !CONST_INT_P (XEXP (operand, 1))))
LOSE_AND_RETURN ("unexpected multiplicative operand", x);
cris_print_base (reg, file);
else
LOSE_AND_RETURN ("unrecognized address", x);
}
- else if (GET_CODE (x) == MEM)
+ else if (MEM_P (x))
{
/* A DIP. Output more indirection characters. */
putc ('[', file);
/* Accessor used in cris.md:return because cfun->machine isn't available
there. */
-int
-cris_return_address_on_stack ()
+bool
+cris_return_address_on_stack (void)
+{
+ return df_regs_ever_live_p (CRIS_SRP_REGNUM)
+ || cfun->machine->needs_return_address_on_stack;
+}
+
+/* Accessor used in cris.md:return because cfun->machine isn't available
+ there. */
+
+bool
+cris_return_address_on_stack_for_return (void)
{
- return cfun->machine->needs_return_address_on_stack;
+ return cfun->machine->return_type == CRIS_RETINSN_RET ? false
+ : cris_return_address_on_stack ();
}
/* This used to be the INITIAL_FRAME_POINTER_OFFSET worker; now only
/* Initial offset is 0 if we don't have a frame pointer. */
int offs = 0;
+ bool got_really_used = false;
+
+ if (current_function_uses_pic_offset_table)
+ {
+ push_topmost_sequence ();
+ got_really_used
+ = reg_used_between_p (pic_offset_table_rtx, get_insns (),
+ NULL_RTX);
+ pop_topmost_sequence ();
+ }
/* And 4 for each register pushed. */
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
- if ((((regs_ever_live[regno]
- && !call_used_regs[regno])
- || (regno == (int) PIC_OFFSET_TABLE_REGNUM
- && (current_function_uses_pic_offset_table
- /* It is saved anyway, if there would be a gap. */
- || (flag_pic
- && regs_ever_live[regno + 1]
- && !call_used_regs[regno + 1]))))
- && (regno != FRAME_POINTER_REGNUM || !frame_pointer_needed)
- && regno != CRIS_SRP_REGNUM)
- || (current_function_calls_eh_return
- && (regno == EH_RETURN_DATA_REGNO (0)
- || regno == EH_RETURN_DATA_REGNO (1)
- || regno == EH_RETURN_DATA_REGNO (2)
- || regno == EH_RETURN_DATA_REGNO (3))))
+ if (cris_reg_saved_in_regsave_area (regno, got_really_used))
offs += 4;
/* And then, last, we add the locals allocated. */
/* We should be able to use regs_ever_live and related prologue
information here, or alpha should not as well. */
- int return_address_on_stack
- = regs_ever_live[CRIS_SRP_REGNUM]
- || cfun->machine->needs_return_address_on_stack != 0;
+ bool return_address_on_stack = cris_return_address_on_stack ();
/* Here we act as if the frame-pointer were needed. */
int ap_fp_offset = 4 + (return_address_on_stack ? 4 : 0);
&& toreg == STACK_POINTER_REGNUM)
return ap_fp_offset + fp_sp_offset - 4;
- abort ();
+ gcc_unreachable ();
+}
+
+/* Worker function for LEGITIMIZE_RELOAD_ADDRESS. */
+
+bool
+cris_reload_address_legitimized (rtx x,
+ enum machine_mode mode ATTRIBUTE_UNUSED,
+ int opnum ATTRIBUTE_UNUSED,
+ int itype,
+ int ind_levels ATTRIBUTE_UNUSED)
+{
+ enum reload_type type = itype;
+ rtx op0, op1;
+ rtx *op0p;
+ rtx *op1p;
+
+ if (GET_CODE (x) != PLUS)
+ return false;
+
+ op0 = XEXP (x, 0);
+ op0p = &XEXP (x, 0);
+ op1 = XEXP (x, 1);
+ op1p = &XEXP (x, 1);
+
+ if (!REG_P (op1))
+ return false;
+
+ if (GET_CODE (op0) == SIGN_EXTEND && MEM_P (XEXP (op0, 0)))
+ {
+ rtx op00 = XEXP (op0, 0);
+ rtx op000 = XEXP (op00, 0);
+ rtx *op000p = &XEXP (op00, 0);
+
+ if ((GET_MODE (op00) == HImode || GET_MODE (op00) == QImode)
+ && (REG_P (op000)
+ || (GET_CODE (op000) == POST_INC && REG_P (XEXP (op000, 0)))))
+ {
+ bool something_reloaded = false;
+
+ if (GET_CODE (op000) == POST_INC
+ && REG_P (XEXP (op000, 0))
+ && REGNO (XEXP (op000, 0)) > CRIS_LAST_GENERAL_REGISTER)
+ /* No, this gets too complicated and is too rare to care
+ about trying to improve on the general code Here.
+ As the return-value is an all-or-nothing indicator, we
+ punt on the other register too. */
+ return false;
+
+ if ((REG_P (op000)
+ && REGNO (op000) > CRIS_LAST_GENERAL_REGISTER))
+ {
+ /* The address of the inner mem is a pseudo or wrong
+ reg: reload that. */
+ push_reload (op000, NULL_RTX, op000p, NULL, GENERAL_REGS,
+ GET_MODE (x), VOIDmode, 0, 0, opnum, type);
+ something_reloaded = true;
+ }
+
+ if (REGNO (op1) > CRIS_LAST_GENERAL_REGISTER)
+ {
+ /* Base register is a pseudo or wrong reg: reload it. */
+ push_reload (op1, NULL_RTX, op1p, NULL, GENERAL_REGS,
+ GET_MODE (x), VOIDmode, 0, 0,
+ opnum, type);
+ something_reloaded = true;
+ }
+
+ gcc_assert (something_reloaded);
+
+ return true;
+ }
+ }
+
+ return false;
}
/* This function looks into the pattern to see how this insn affects
if (GET_CODE (exp) == SET)
{
if (cc_status.value1
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value1))
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
if (cc_status.value2
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value2))
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
}
return;
if (GET_CODE (SET_SRC (exp)) == ZERO_EXTRACT
&& XEXP (SET_SRC (exp), 1) == const1_rtx)
{
- if (GET_CODE (XEXP (SET_SRC (exp), 0)) == CONST_INT)
+ if (CONST_INT_P (XEXP (SET_SRC (exp), 0)))
/* Using cmpq. */
cc_status.flags = CC_INVERTED;
else
{
/* There's no CC0 change when clearing a register or
memory. Just check for overlap. */
- if ((cc_status.value1
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value1)))
+ if (cc_status.value1
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
- if ((cc_status.value2
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value2)))
+ if (cc_status.value2
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
return;
return;
}
}
- else if (GET_CODE (SET_DEST (exp)) == MEM
+ else if (MEM_P (SET_DEST (exp))
|| (GET_CODE (SET_DEST (exp)) == STRICT_LOW_PART
- && GET_CODE (XEXP (SET_DEST (exp), 0)) == MEM))
+ && MEM_P (XEXP (SET_DEST (exp), 0))))
{
/* When SET to MEM, then CC is not changed (except for
overlap). */
- if ((cc_status.value1
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value1)))
+ if (cc_status.value1
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
- if ((cc_status.value2
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value2)))
+ if (cc_status.value2
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
return;
&& REG_P (XEXP (XVECEXP (exp, 0, 1), 0)))
{
if (REG_P (XEXP (XVECEXP (exp, 0, 0), 0))
- && GET_CODE (XEXP (XVECEXP (exp, 0, 0), 1)) == MEM)
+ && MEM_P (XEXP (XVECEXP (exp, 0, 0), 1)))
{
/* For "move.S [rx=ry+o],rz", say CC reflects
value1=rz and value2=[rx] */
}
else if ((REG_P (XEXP (XVECEXP (exp, 0, 0), 1))
|| XEXP (XVECEXP (exp, 0, 0), 1) == const0_rtx)
- && GET_CODE (XEXP (XVECEXP (exp, 0, 0), 0)) == MEM)
+ && MEM_P (XEXP (XVECEXP (exp, 0, 0), 0)))
{
/* For "move.S rz,[rx=ry+o]" and "clear.S [rx=ry+o]",
say flags are not changed, except for overlap. */
if (cc_status.value1
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 0), 0),
- cc_status.value1))
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
- if (cc_status.value1
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 1), 0),
- cc_status.value1))
- cc_status.value1 = 0;
-
- if (cc_status.value2
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 0), 0),
- cc_status.value2))
- cc_status.value2 = 0;
-
if (cc_status.value2
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 1), 0),
- cc_status.value2))
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
return;
break;
default:
- /* Unknown cc_attr value. */
- abort ();
+ internal_error ("unknown cc_attr value");
}
CC_STATUS_INIT;
}
/* Return != 0 if the return sequence for the current function is short,
- like "ret" or "jump [sp+]". Prior to reloading, we can't tell how
- many registers must be saved, so return 0 then. */
+ like "ret" or "jump [sp+]". Prior to reloading, we can't tell if
+ registers must be saved, so return 0 then. */
-int
+bool
cris_simple_epilogue (void)
{
- int regno;
- int reglimit = STACK_POINTER_REGNUM;
- int lastreg = -1;
+ unsigned int regno;
+ unsigned int reglimit = STACK_POINTER_REGNUM;
+ bool got_really_used = false;
if (! reload_completed
|| frame_pointer_needed
/* If we're not supposed to emit prologue and epilogue, we must
not emit return-type instructions. */
|| !TARGET_PROLOGUE_EPILOGUE)
- return 0;
+ return false;
+
+ if (current_function_uses_pic_offset_table)
+ {
+ push_topmost_sequence ();
+ got_really_used
+ = reg_used_between_p (pic_offset_table_rtx, get_insns (), NULL_RTX);
+ pop_topmost_sequence ();
+ }
- /* We allow a "movem [sp+],rN" to sit in front if the "jump [sp+]" or
- in the delay-slot of the "ret". */
+ /* No simple epilogue if there are saved registers. */
for (regno = 0; regno < reglimit; regno++)
- if ((regs_ever_live[regno] && ! call_used_regs[regno])
- || (regno == (int) PIC_OFFSET_TABLE_REGNUM
- && (current_function_uses_pic_offset_table
- /* It is saved anyway, if there would be a gap. */
- || (flag_pic
- && regs_ever_live[regno + 1]
- && !call_used_regs[regno + 1]))))
- {
- if (lastreg != regno - 1)
- return 0;
- lastreg = regno;
- }
+ if (cris_reg_saved_in_regsave_area (regno, got_really_used))
+ return false;
- return 1;
+ return true;
+}
+
+/* Expand a return insn (just one insn) marked as using SRP or stack
+ slot depending on parameter ON_STACK. */
+
+void
+cris_expand_return (bool on_stack)
+{
+ /* FIXME: emit a parallel with a USE for SRP or the stack-slot, to
+ tell "ret" from "jump [sp+]". Some, but not all, other parts of
+ GCC expect just (return) to do the right thing when optimizing, so
+ we do that until they're fixed. Currently, all return insns in a
+ function must be the same (not really a limiting factor) so we need
+ to check that it doesn't change half-way through. */
+ emit_jump_insn (gen_rtx_RETURN (VOIDmode));
+
+ CRIS_ASSERT (cfun->machine->return_type != CRIS_RETINSN_RET || !on_stack);
+ CRIS_ASSERT (cfun->machine->return_type != CRIS_RETINSN_JUMP || on_stack);
+
+ cfun->machine->return_type
+ = on_stack ? CRIS_RETINSN_JUMP : CRIS_RETINSN_RET;
}
/* Compute a (partial) cost for rtx X. Return true if the complete
/* Eight or 16 bits are a word and cycle more expensive. */
else if (val <= 32767 && val >= -32768)
*total = 2;
- /* A 32 bit constant (or very seldom, unsigned 16 bits) costs
+ /* A 32-bit constant (or very seldom, unsigned 16 bits) costs
another word. FIXME: This isn't linear to 16 bits. */
else
*total = 4;
case CONST:
case SYMBOL_REF:
- /* For PIC, we need a prefix (if it isn't already there),
- and the PIC register. For a global PIC symbol, we also
- need a read of the GOT. */
- if (flag_pic)
- {
- if (cris_got_symbol (x))
- *total = 2 + 4 + 6;
- else
- *total = 2 + 6;
- }
- else
- *total = 6;
+ *total = 6;
return true;
case CONST_DOUBLE:
case MULT:
/* Identify values that are no powers of two. Powers of 2 are
taken care of already and those values should not be changed. */
- if (GET_CODE (XEXP (x, 1)) != CONST_INT
+ if (!CONST_INT_P (XEXP (x, 1))
|| exact_log2 (INTVAL (XEXP (x, 1)) < 0))
{
/* If we have a multiply insn, then the cost is between
case MOD:
case UMOD:
case DIV:
- if (GET_CODE (XEXP (x, 1)) != CONST_INT
+ if (!CONST_INT_P (XEXP (x, 1))
|| exact_log2 (INTVAL (XEXP (x, 1)) < 0))
{
/* Estimate this as 4 + 8 * #of bits. */
return false;
case AND:
- if (GET_CODE (XEXP (x, 1)) == CONST_INT
+ if (CONST_INT_P (XEXP (x, 1))
/* Two constants may actually happen before optimization. */
- && GET_CODE (XEXP (x, 0)) != CONST_INT
+ && !CONST_INT_P (XEXP (x, 0))
&& !CONST_OK_FOR_LETTER_P (INTVAL (XEXP (x, 1)), 'I'))
{
*total = (rtx_cost (XEXP (x, 0), outer_code) + 2
/* An indirect mem must be a DIP. This means two bytes extra for code,
and 4 bytes extra for memory read, i.e. (2 + 4) / 2. */
- if (GET_CODE (x) == MEM)
+ if (MEM_P (x))
return (2 + 4) / 2;
/* Assume (2 + 4) / 2 for a single constant; a dword, since it needs
- an extra DIP prefix and 4 bytes of constant in most cases.
- For PIC and a symbol with a GOT entry, we double the cost since we
- add a [rPIC+...] offset. A GOT-less symbol uses a BDAP prefix
- equivalent to the DIP prefix for non-PIC, hence the same cost. */
+ an extra DIP prefix and 4 bytes of constant in most cases. */
if (CONSTANT_P (x))
- return flag_pic && cris_got_symbol (x) ? 2 * (2 + 4) / 2 : (2 + 4) / 2;
+ return (2 + 4) / 2;
/* Handle BIAP and BDAP prefixes. */
if (GET_CODE (x) == PLUS)
/* A BDAP (quick) is 2 extra bytes. Any constant operand to the
PLUS is always found in tem2. */
- if (GET_CODE (tem2) == CONST_INT
- && INTVAL (tem2) < 128 && INTVAL (tem2) >= -128)
+ if (CONST_INT_P (tem2) && INTVAL (tem2) < 128 && INTVAL (tem2) >= -128)
return 2 / 2;
/* A BDAP -32768 .. 32767 is like BDAP quick, but with 2 extra
bytes. */
- if (GET_CODE (tem2) == CONST_INT
- && CONST_OK_FOR_LETTER_P (INTVAL (tem2), 'L'))
+ if (CONST_INT_P (tem2) && CONST_OK_FOR_LETTER_P (INTVAL (tem2), 'L'))
return (2 + 2) / 2;
/* A BDAP with some other constant is 2 bytes extra. */
/* Do not allow rx = rx + n if a normal add or sub with same size
would do. */
if (rtx_equal_p (ops[lreg], reg_rtx)
- && GET_CODE (val_rtx) == CONST_INT
+ && CONST_INT_P (val_rtx)
&& (INTVAL (val_rtx) <= 63 && INTVAL (val_rtx) >= -63))
return 0;
- /* Check allowed cases, like [r(+)?].[bwd] and const.
- A symbol is not allowed with PIC. */
+ /* Check allowed cases, like [r(+)?].[bwd] and const. */
if (CONSTANT_P (val_rtx))
- return flag_pic == 0 || cris_symbol (val_rtx) == 0;
+ return 1;
- if (GET_CODE (val_rtx) == MEM
- && BASE_OR_AUTOINCR_P (XEXP (val_rtx, 0)))
+ if (MEM_P (val_rtx) && BASE_OR_AUTOINCR_P (XEXP (val_rtx, 0)))
return 1;
if (GET_CODE (val_rtx) == SIGN_EXTEND
- && GET_CODE (XEXP (val_rtx, 0)) == MEM
+ && MEM_P (XEXP (val_rtx, 0))
&& BASE_OR_AUTOINCR_P (XEXP (XEXP (val_rtx, 0), 0)))
return 1;
default_elf_asm_named_section (name, flags, decl);
}
-/* The LEGITIMATE_PIC_OPERAND_P worker. */
+/* Return TRUE iff X is a CONST valid for e.g. indexing. */
-int
-cris_legitimate_pic_operand (rtx x)
+bool
+cris_valid_pic_const (rtx x)
{
- /* The PIC representation of a symbol with a GOT entry will be (for
- example; relocations differ):
- sym => [rPIC+sym:GOT]
- and for a GOT-less symbol it will be (for example, relocation differ):
- sym => rPIC+sym:GOTOFF
- so only a symbol with a GOT is by itself a valid operand, and it
- can't be a sum of a symbol and an offset. */
- return ! cris_symbol (x) || cris_got_symbol (x);
+ gcc_assert (flag_pic);
+
+ switch (GET_CODE (x))
+ {
+ case CONST_INT:
+ case CONST_DOUBLE:
+ return true;
+ default:
+ ;
+ }
+
+ if (GET_CODE (x) != CONST)
+ return false;
+
+ x = XEXP (x, 0);
+
+ /* Handle (const (plus (unspec .. UNSPEC_GOTREL) (const_int ...))). */
+ if (GET_CODE (x) == PLUS
+ && GET_CODE (XEXP (x, 0)) == UNSPEC
+ && XINT (XEXP (x, 0), 1) == CRIS_UNSPEC_GOTREL
+ && CONST_INT_P (XEXP (x, 1)))
+ x = XEXP (x, 0);
+
+ if (GET_CODE (x) == UNSPEC)
+ switch (XINT (x, 1))
+ {
+ case CRIS_UNSPEC_PLT:
+ case CRIS_UNSPEC_PLTGOTREAD:
+ case CRIS_UNSPEC_GOTREAD:
+ case CRIS_UNSPEC_GOTREL:
+ return true;
+ default:
+ gcc_unreachable ();
+ }
+
+ return cris_pic_symbol_type_of (x) == cris_no_symbol;
}
-/* Return nonzero if there's a SYMBOL_REF or LABEL_REF hiding inside this
- CONSTANT_P. */
+/* Helper function to find the right PIC-type symbol to generate,
+ given the original (non-PIC) representation. */
-int
-cris_symbol (rtx x)
+enum cris_pic_symbol_type
+cris_pic_symbol_type_of (rtx x)
{
switch (GET_CODE (x))
{
case SYMBOL_REF:
- case LABEL_REF:
- return 1;
+ return SYMBOL_REF_LOCAL_P (x)
+ ? cris_gotrel_symbol : cris_got_symbol;
- case UNSPEC:
- /* A PLT reference. */
- ASSERT_PLT_UNSPEC (x);
- return 1;
+ case LABEL_REF:
+ return cris_gotrel_symbol;
case CONST:
- return cris_symbol (XEXP (x, 0));
+ return cris_pic_symbol_type_of (XEXP (x, 0));
case PLUS:
case MINUS:
- return cris_symbol (XEXP (x, 0)) || cris_symbol (XEXP (x, 1));
+ {
+ enum cris_pic_symbol_type t1 = cris_pic_symbol_type_of (XEXP (x, 0));
+ enum cris_pic_symbol_type t2 = cris_pic_symbol_type_of (XEXP (x, 1));
- case CONST_INT:
- case CONST_DOUBLE:
- return 0;
-
- default:
- fatal_insn ("unrecognized supposed constant", x);
- }
-
- return 1;
-}
-
-/* Return nonzero if there's a SYMBOL_REF or LABEL_REF hiding inside this
- CONSTANT_P, and the symbol does not need a GOT entry. Also set
- current_function_uses_pic_offset_table if we're generating PIC and ever
- see something that would need one. */
-
-int
-cris_gotless_symbol (rtx x)
-{
-#ifdef ENABLE_CHECKING
- if (!flag_pic)
- abort ();
-#endif
+ gcc_assert (t1 == cris_no_symbol || t2 == cris_no_symbol);
- switch (GET_CODE (x))
- {
- case UNSPEC:
- ASSERT_PLT_UNSPEC (x);
- return 1;
+ if (t1 == cris_got_symbol || t1 == cris_got_symbol)
+ return cris_got_symbol_needing_fixup;
- case SYMBOL_REF:
- if (cfun != NULL)
- current_function_uses_pic_offset_table = 1;
- return SYMBOL_REF_LOCAL_P (x);
-
- case LABEL_REF:
- /* We don't set current_function_uses_pic_offset_table for
- LABEL_REF:s in here, since they are almost always originating
- from some branch. The only time it does not come from a label is
- when GCC does something like __builtin_setjmp. Then we get the
- LABEL_REF from the movsi expander, so we mark it there as a
- special case. */
- return 1;
-
- case CONST:
- return cris_gotless_symbol (XEXP (x, 0));
-
- case PLUS:
- case MINUS:
- {
- int x0 = cris_gotless_symbol (XEXP (x, 0)) != 0;
- int x1 = cris_gotless_symbol (XEXP (x, 1)) != 0;
-
- /* One and only one of them must be a local symbol. Neither must
- be some other, more general kind of symbol. */
- return
- (x0 ^ x1)
- && ! (x0 == 0 && cris_symbol (XEXP (x, 0)))
- && ! (x1 == 0 && cris_symbol (XEXP (x, 1)));
+ return t1 != cris_no_symbol ? t1 : t2;
}
case CONST_INT:
case CONST_DOUBLE:
- return 0;
+ return cris_no_symbol;
+
+ case UNSPEC:
+ /* Likely an offsettability-test attempting to add a constant to
+ a GOTREAD symbol, which can't be handled. */
+ return cris_invalid_pic_symbol;
default:
fatal_insn ("unrecognized supposed constant", x);
}
- return 1;
+ gcc_unreachable ();
}
-/* Return nonzero if there's a SYMBOL_REF or LABEL_REF hiding inside this
- CONSTANT_P, and the symbol needs a GOT entry. */
+/* The LEGITIMATE_PIC_OPERAND_P worker. */
int
-cris_got_symbol (rtx x)
+cris_legitimate_pic_operand (rtx x)
{
-#ifdef ENABLE_CHECKING
- if (!flag_pic)
- abort ();
-#endif
+ /* Symbols are not valid PIC operands as-is; just constants. */
+ return cris_valid_pic_const (x);
+}
- switch (GET_CODE (x))
+/* TARGET_HANDLE_OPTION worker. We just store the values into local
+ variables here. Checks for correct semantics are in
+ cris_override_options. */
+
+static bool
+cris_handle_option (size_t code, const char *arg ATTRIBUTE_UNUSED,
+ int value ATTRIBUTE_UNUSED)
+{
+ switch (code)
{
- case UNSPEC:
- ASSERT_PLT_UNSPEC (x);
- return 0;
+ case OPT_metrax100:
+ target_flags
+ |= (MASK_SVINTO
+ + MASK_ETRAX4_ADD
+ + MASK_ALIGN_BY_32);
+ break;
- case SYMBOL_REF:
- if (cfun != NULL)
- current_function_uses_pic_offset_table = 1;
- return ! SYMBOL_REF_LOCAL_P (x);
+ case OPT_mno_etrax100:
+ target_flags
+ &= ~(MASK_SVINTO
+ + MASK_ETRAX4_ADD
+ + MASK_ALIGN_BY_32);
+ break;
- case CONST:
- return cris_got_symbol (XEXP (x, 0));
+ case OPT_m32_bit:
+ case OPT_m32bit:
+ target_flags
+ |= (MASK_STACK_ALIGN
+ + MASK_CONST_ALIGN
+ + MASK_DATA_ALIGN
+ + MASK_ALIGN_BY_32);
+ break;
- case LABEL_REF:
- /* A LABEL_REF is never visible as a symbol outside the local
- function. */
- case PLUS:
- case MINUS:
- /* Nope, can't access the GOT for "symbol + offset". */
- return 0;
+ case OPT_m16_bit:
+ case OPT_m16bit:
+ target_flags
+ |= (MASK_STACK_ALIGN
+ + MASK_CONST_ALIGN
+ + MASK_DATA_ALIGN);
+ break;
- case CONST_INT:
- case CONST_DOUBLE:
- return 0;
+ case OPT_m8_bit:
+ case OPT_m8bit:
+ target_flags
+ &= ~(MASK_STACK_ALIGN
+ + MASK_CONST_ALIGN
+ + MASK_DATA_ALIGN);
+ break;
default:
- fatal_insn ("unrecognized supposed constant in cris_global_pic_symbol",
- x);
+ break;
}
- return 1;
+ CRIS_SUBTARGET_HANDLE_OPTION(code, arg, value);
+
+ return true;
}
/* The OVERRIDE_OPTIONS worker.
/* Set the target flags. */
if (cris_cpu_version >= CRIS_CPU_ETRAX4)
- target_flags |= TARGET_MASK_ETRAX4_ADD;
+ target_flags |= MASK_ETRAX4_ADD;
/* If this is Svinto or higher, align for 32 bit accesses. */
if (cris_cpu_version >= CRIS_CPU_SVINTO)
target_flags
- |= (TARGET_MASK_SVINTO | TARGET_MASK_ALIGN_BY_32
- | TARGET_MASK_STACK_ALIGN | TARGET_MASK_CONST_ALIGN
- | TARGET_MASK_DATA_ALIGN);
+ |= (MASK_SVINTO | MASK_ALIGN_BY_32
+ | MASK_STACK_ALIGN | MASK_CONST_ALIGN
+ | MASK_DATA_ALIGN);
/* Note that we do not add new flags when it can be completely
described with a macro that uses -mcpu=X. So
/* We have currently nothing more to tune than alignment for
memory accesses. */
target_flags
- |= (TARGET_MASK_STACK_ALIGN | TARGET_MASK_CONST_ALIGN
- | TARGET_MASK_DATA_ALIGN | TARGET_MASK_ALIGN_BY_32);
+ |= (MASK_STACK_ALIGN | MASK_CONST_ALIGN
+ | MASK_DATA_ALIGN | MASK_ALIGN_BY_32);
}
if (flag_pic)
if (write_symbols == DWARF2_DEBUG && ! TARGET_ELF)
{
- warning ("that particular -g option is invalid with -maout and -melinux");
+ warning (0, "that particular -g option is invalid with -maout and -melinux");
write_symbols = DBX_DEBUG;
}
}
}
-/* Boilerplate emitted at start of file.
+/* Boilerplate emitted at start of file.
NO_APP *only at file start* means faster assembly. It also means
comments are not allowed. In some cases comments will be output
/* We used to have to handle (SUBREG (MEM)) here, but that should no
longer happen; after reload there are no SUBREGs any more, and we're
only called after reload. */
- if (GET_CODE (dest) == SUBREG || GET_CODE (src) == SUBREG)
- abort ();
+ CRIS_ASSERT (GET_CODE (dest) != SUBREG && GET_CODE (src) != SUBREG);
start_sequence ();
- if (GET_CODE (dest) == REG)
+ if (REG_P (dest))
{
int dregno = REGNO (dest);
/* Reg-to-reg copy. */
- if (GET_CODE (src) == REG)
+ if (REG_P (src))
{
int sregno = REGNO (src);
operand_subword (src, !reverse, TRUE, mode)));
}
/* Constant-to-reg copy. */
- else if (GET_CODE (src) == CONST_INT || GET_CODE (src) == CONST_DOUBLE)
+ else if (CONST_INT_P (src) || GET_CODE (src) == CONST_DOUBLE)
{
rtx words[2];
split_double (src, &words[0], &words[1]);
words[1]));
}
/* Mem-to-reg copy. */
- else if (GET_CODE (src) == MEM)
+ else if (MEM_P (src))
{
/* If the high-address word is used in the address, we must load it
last. Otherwise, load it first. */
if (GET_CODE (addr) == POST_INC)
{
- emit_insn (gen_rtx_SET (VOIDmode,
- operand_subword (dest, 0, TRUE, mode),
- change_address (src, SImode, addr)));
- emit_insn (gen_rtx_SET (VOIDmode,
- operand_subword (dest, 1, TRUE, mode),
- change_address (src, SImode, addr)));
+ rtx mem;
+ rtx insn;
+
+ /* Whenever we emit insns with post-incremented
+ addresses ourselves, we must add a post-inc note
+ manually. */
+ mem = change_address (src, SImode, addr);
+ insn
+ = gen_rtx_SET (VOIDmode,
+ operand_subword (dest, 0, TRUE, mode), mem);
+ insn = emit_insn (insn);
+ if (GET_CODE (XEXP (mem, 0)) == POST_INC)
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, XEXP (XEXP (mem, 0), 0),
+ REG_NOTES (insn));
+
+ mem = change_address (src, SImode, addr);
+ insn
+ = gen_rtx_SET (VOIDmode,
+ operand_subword (dest, 1, TRUE, mode), mem);
+ insn = emit_insn (insn);
+ if (GET_CODE (XEXP (mem, 0)) == POST_INC)
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, XEXP (XEXP (mem, 0), 0),
+ REG_NOTES (insn));
}
else
{
}
}
else
- abort ();
+ internal_error ("Unknown src");
}
/* Reg-to-mem copy or clear mem. */
- else if (GET_CODE (dest) == MEM
- && (GET_CODE (src) == REG
+ else if (MEM_P (dest)
+ && (REG_P (src)
|| src == const0_rtx
|| src == CONST0_RTX (DFmode)))
{
if (GET_CODE (addr) == POST_INC)
{
- emit_insn (gen_rtx_SET (VOIDmode,
- change_address (dest, SImode, addr),
- operand_subword (src, 0, TRUE, mode)));
- emit_insn (gen_rtx_SET (VOIDmode,
- change_address (dest, SImode, addr),
- operand_subword (src, 1, TRUE, mode)));
+ rtx mem;
+ rtx insn;
+
+ /* Whenever we emit insns with post-incremented addresses
+ ourselves, we must add a post-inc note manually. */
+ mem = change_address (dest, SImode, addr);
+ insn
+ = gen_rtx_SET (VOIDmode,
+ mem, operand_subword (src, 0, TRUE, mode));
+ insn = emit_insn (insn);
+ if (GET_CODE (XEXP (mem, 0)) == POST_INC)
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, XEXP (XEXP (mem, 0), 0),
+ REG_NOTES (insn));
+
+ mem = change_address (dest, SImode, addr);
+ insn
+ = gen_rtx_SET (VOIDmode,
+ mem,
+ operand_subword (src, 1, TRUE, mode));
+ insn = emit_insn (insn);
+ if (GET_CODE (XEXP (mem, 0)) == POST_INC)
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, XEXP (XEXP (mem, 0), 0),
+ REG_NOTES (insn));
}
else
{
}
else
- abort ();
+ internal_error ("Unknown dest");
val = get_insns ();
end_sequence ();
return val;
}
-/* This is in essence a copy of output_addr_const altered to output
- symbolic operands as PIC.
-
- FIXME: Add hooks similar to ASM_OUTPUT_SYMBOL_REF to get this effect in
- the "real" output_addr_const. All we need is one for LABEL_REF (and
- one for CODE_LABEL?). */
+/* The expander for the prologue pattern name. */
void
-cris_output_addr_const (FILE *file, rtx x)
+cris_expand_prologue (void)
{
- int is_plt = 0;
+ int regno;
+ int size = get_frame_size ();
+ /* Shorten the used name for readability. */
+ int cfoa_size = current_function_outgoing_args_size;
+ int last_movem_reg = -1;
+ int framesize = 0;
+ rtx mem, insn;
+ int return_address_on_stack = cris_return_address_on_stack ();
+ int got_really_used = false;
+ int n_movem_regs = 0;
+ int pretend = current_function_pretend_args_size;
-restart:
- switch (GET_CODE (x))
+ /* Don't do anything if no prologues or epilogues are wanted. */
+ if (!TARGET_PROLOGUE_EPILOGUE)
+ return;
+
+ CRIS_ASSERT (size >= 0);
+
+ if (current_function_uses_pic_offset_table)
{
- case UNSPEC:
- ASSERT_PLT_UNSPEC (x);
- x = XVECEXP (x, 0, 0);
- is_plt = 1;
+ /* A reference may have been optimized out (like the abort () in
+ fde_split in unwind-dw2-fde.c, at least 3.2.1) so check that
+ it's still used. */
+ push_topmost_sequence ();
+ got_really_used
+ = reg_used_between_p (pic_offset_table_rtx, get_insns (), NULL_RTX);
+ pop_topmost_sequence ();
+ }
- /* Fall through. */
- case SYMBOL_REF:
- if (flag_pic)
+ /* Align the size to what's best for the CPU model. */
+ if (TARGET_STACK_ALIGN)
+ size = TARGET_ALIGN_BY_32 ? (size + 3) & ~3 : (size + 1) & ~1;
+
+ if (pretend)
+ {
+ /* See also cris_setup_incoming_varargs where
+ cfun->machine->stdarg_regs is set. There are other setters of
+ current_function_pretend_args_size than stdarg handling, like
+ for an argument passed with parts in R13 and stack. We must
+ not store R13 into the pretend-area for that case, as GCC does
+ that itself. "Our" store would be marked as redundant and GCC
+ will attempt to remove it, which will then be flagged as an
+ internal error; trying to remove a frame-related insn. */
+ int stdarg_regs = cfun->machine->stdarg_regs;
+
+ framesize += pretend;
+
+ for (regno = CRIS_FIRST_ARG_REG + CRIS_MAX_ARGS_IN_REGS - 1;
+ stdarg_regs > 0;
+ regno--, pretend -= 4, stdarg_regs--)
{
- const char *origstr = XSTR (x, 0);
- const char *str;
+ insn = emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -4)));
+ /* FIXME: When dwarf2 frame output and unless asynchronous
+ exceptions, make dwarf2 bundle together all stack
+ adjustments like it does for registers between stack
+ adjustments. */
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ mem = gen_rtx_MEM (SImode, stack_pointer_rtx);
+ set_mem_alias_set (mem, get_varargs_alias_set ());
+ insn = emit_move_insn (mem, gen_rtx_raw_REG (SImode, regno));
+
+ /* Note the absence of RTX_FRAME_RELATED_P on the above insn:
+ the value isn't restored, so we don't want to tell dwarf2
+ that it's been stored to stack, else EH handling info would
+ get confused. */
+ }
- str = (* targetm.strip_name_encoding) (origstr);
+ /* For other setters of current_function_pretend_args_size, we
+ just adjust the stack by leaving the remaining size in
+ "pretend", handled below. */
+ }
- if (is_plt)
+ /* Save SRP if not a leaf function. */
+ if (return_address_on_stack)
+ {
+ insn = emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -4 - pretend)));
+ pretend = 0;
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ mem = gen_rtx_MEM (SImode, stack_pointer_rtx);
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = emit_move_insn (mem, gen_rtx_raw_REG (SImode, CRIS_SRP_REGNUM));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ framesize += 4;
+ }
+
+ /* Set up the frame pointer, if needed. */
+ if (frame_pointer_needed)
+ {
+ insn = emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -4 - pretend)));
+ pretend = 0;
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ mem = gen_rtx_MEM (SImode, stack_pointer_rtx);
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = emit_move_insn (mem, frame_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ insn = emit_move_insn (frame_pointer_rtx, stack_pointer_rtx);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ framesize += 4;
+ }
+
+ /* Between frame-pointer and saved registers lie the area for local
+ variables. If we get here with "pretended" size remaining, count
+ it into the general stack size. */
+ size += pretend;
+
+ /* Get a contiguous sequence of registers, starting with R0, that need
+ to be saved. */
+ for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
+ {
+ if (cris_reg_saved_in_regsave_area (regno, got_really_used))
+ {
+ n_movem_regs++;
+
+ /* Check if movem may be used for registers so far. */
+ if (regno == last_movem_reg + 1)
+ /* Yes, update next expected register. */
+ last_movem_reg = regno;
+ else
{
- if (cris_pic_sympart_only)
- {
- assemble_name (file, str);
- fprintf (file, ":PLTG");
- }
- else
+ /* We cannot use movem for all registers. We have to flush
+ any movem:ed registers we got so far. */
+ if (last_movem_reg != -1)
{
- if (TARGET_AVOID_GOTPLT)
- /* We shouldn't get here. */
- abort ();
+ int n_saved
+ = (n_movem_regs == 1) ? 1 : last_movem_reg + 1;
- fprintf (file, "[$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- assemble_name (file, XSTR (x, 0));
-
- if (flag_pic == 1)
- fprintf (file, ":GOTPLT16]");
+ /* It is a win to use a side-effect assignment for
+ 64 <= size <= 128. But side-effect on movem was
+ not usable for CRIS v0..3. Also only do it if
+ side-effects insns are allowed. */
+ if ((last_movem_reg + 1) * 4 + size >= 64
+ && (last_movem_reg + 1) * 4 + size <= 128
+ && (cris_cpu_version >= CRIS_CPU_SVINTO || n_saved == 1)
+ && TARGET_SIDE_EFFECT_PREFIXES)
+ {
+ mem
+ = gen_rtx_MEM (SImode,
+ plus_constant (stack_pointer_rtx,
+ -(n_saved * 4 + size)));
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn
+ = cris_emit_movem_store (mem, GEN_INT (n_saved),
+ -(n_saved * 4 + size),
+ true);
+ }
else
- fprintf (file, ":GOTPLT]");
+ {
+ insn
+ = gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -(n_saved * 4 + size)));
+ insn = emit_insn (insn);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ mem = gen_rtx_MEM (SImode, stack_pointer_rtx);
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = cris_emit_movem_store (mem, GEN_INT (n_saved),
+ 0, true);
+ }
+
+ framesize += n_saved * 4 + size;
+ last_movem_reg = -1;
+ size = 0;
}
- }
- else if (cris_gotless_symbol (x))
- {
- if (! cris_pic_sympart_only)
- fprintf (file, "$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- assemble_name (file, str);
- fprintf (file, ":GOTOFF");
- }
- else if (cris_got_symbol (x))
- {
- if (cris_pic_sympart_only)
- abort ();
- fprintf (file, "[$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- assemble_name (file, XSTR (x, 0));
- if (flag_pic == 1)
- fprintf (file, ":GOT16]");
- else
- fprintf (file, ":GOT]");
+ insn = emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -4 - size)));
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ mem = gen_rtx_MEM (SImode, stack_pointer_rtx);
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = emit_move_insn (mem, gen_rtx_raw_REG (SImode, regno));
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ framesize += 4 + size;
+ size = 0;
}
- else
- LOSE_AND_RETURN ("unexpected PIC symbol", x);
+ }
+ }
- /* Sanity check. */
- if (! current_function_uses_pic_offset_table)
- output_operand_lossage ("PIC register isn't set up");
+ /* Check after, if we could movem all registers. This is the normal case. */
+ if (last_movem_reg != -1)
+ {
+ int n_saved
+ = (n_movem_regs == 1) ? 1 : last_movem_reg + 1;
+
+ /* Side-effect on movem was not usable for CRIS v0..3. Also only
+ do it if side-effects insns are allowed. */
+ if ((last_movem_reg + 1) * 4 + size >= 64
+ && (last_movem_reg + 1) * 4 + size <= 128
+ && (cris_cpu_version >= CRIS_CPU_SVINTO || n_saved == 1)
+ && TARGET_SIDE_EFFECT_PREFIXES)
+ {
+ mem
+ = gen_rtx_MEM (SImode,
+ plus_constant (stack_pointer_rtx,
+ -(n_saved * 4 + size)));
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = cris_emit_movem_store (mem, GEN_INT (n_saved),
+ -(n_saved * 4 + size), true);
}
else
- assemble_name (file, XSTR (x, 0));
- break;
+ {
+ insn
+ = gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -(n_saved * 4 + size)));
+ insn = emit_insn (insn);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ mem = gen_rtx_MEM (SImode, stack_pointer_rtx);
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = cris_emit_movem_store (mem, GEN_INT (n_saved), 0, true);
+ }
- case LABEL_REF:
- /* If we get one of those here, it should be dressed as PIC. Branch
- labels are normally output with the 'l' specifier, which means it
- will go directly to output_asm_label and not end up here. */
- if (GET_CODE (XEXP (x, 0)) != CODE_LABEL
- && (GET_CODE (XEXP (x, 0)) != NOTE
- || NOTE_LINE_NUMBER (XEXP (x, 0)) != NOTE_INSN_DELETED_LABEL))
- fatal_insn ("unexpected address expression", x);
-
- if (flag_pic)
+ framesize += n_saved * 4 + size;
+ /* We have to put outgoing argument space after regs. */
+ if (cfoa_size)
{
- if (cris_gotless_symbol (x))
- {
- if (! cris_pic_sympart_only)
- fprintf (file, "$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- cris_output_addr_const (file, XEXP (x, 0));
+ insn = emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -cfoa_size)));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ framesize += cfoa_size;
+ }
+ }
+ else if ((size + cfoa_size) > 0)
+ {
+ insn = emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ -(cfoa_size + size))));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ framesize += size + cfoa_size;
+ }
- fprintf (file, ":GOTOFF");
- }
- else
- /* Labels are never marked as global symbols. */
- fatal_insn ("unexpected PIC symbol", x);
+ /* Set up the PIC register, if it is used. */
+ if (got_really_used)
+ {
+ rtx got
+ = gen_rtx_UNSPEC (SImode, gen_rtvec (1, const0_rtx), CRIS_UNSPEC_GOT);
+ emit_move_insn (pic_offset_table_rtx, got);
+
+ /* FIXME: This is a cover-up for flow2 messing up; it doesn't
+ follow exceptional paths and tries to delete the GOT load as
+ unused, if it isn't used on the non-exceptional paths. Other
+ ports have similar or other cover-ups, or plain bugs marking
+ the GOT register load as maybe-dead. To see this, remove the
+ line below and try libsupc++/vec.cc or a trivial
+ "static void y (); void x () {try {y ();} catch (...) {}}". */
+ emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx));
+ }
+
+ if (cris_max_stackframe && framesize > cris_max_stackframe)
+ warning (0, "stackframe too big: %d bytes", framesize);
+}
+
+/* The expander for the epilogue pattern. */
+
+void
+cris_expand_epilogue (void)
+{
+ int regno;
+ int size = get_frame_size ();
+ int last_movem_reg = -1;
+ int argspace_offset = current_function_outgoing_args_size;
+ int pretend = current_function_pretend_args_size;
+ rtx mem;
+ bool return_address_on_stack = cris_return_address_on_stack ();
+ /* A reference may have been optimized out
+ (like the abort () in fde_split in unwind-dw2-fde.c, at least 3.2.1)
+ so check that it's still used. */
+ int got_really_used = false;
+ int n_movem_regs = 0;
+
+ if (!TARGET_PROLOGUE_EPILOGUE)
+ return;
- /* Sanity check. */
- if (! current_function_uses_pic_offset_table)
- internal_error ("emitting PIC operand, but PIC register isn't set up");
+ if (current_function_uses_pic_offset_table)
+ {
+ /* A reference may have been optimized out (like the abort () in
+ fde_split in unwind-dw2-fde.c, at least 3.2.1) so check that
+ it's still used. */
+ push_topmost_sequence ();
+ got_really_used
+ = reg_used_between_p (pic_offset_table_rtx, get_insns (), NULL_RTX);
+ pop_topmost_sequence ();
+ }
+
+ /* Align byte count of stack frame. */
+ if (TARGET_STACK_ALIGN)
+ size = TARGET_ALIGN_BY_32 ? (size + 3) & ~3 : (size + 1) & ~1;
+
+ /* Check how many saved regs we can movem. They start at r0 and must
+ be contiguous. */
+ for (regno = 0;
+ regno < FIRST_PSEUDO_REGISTER;
+ regno++)
+ if (cris_reg_saved_in_regsave_area (regno, got_really_used))
+ {
+ n_movem_regs++;
+
+ if (regno == last_movem_reg + 1)
+ last_movem_reg = regno;
+ else
break;
+ }
+
+ /* If there was only one register that really needed to be saved
+ through movem, don't use movem. */
+ if (n_movem_regs == 1)
+ last_movem_reg = -1;
+
+ /* Now emit "normal" move insns for all regs higher than the movem
+ regs. */
+ for (regno = FIRST_PSEUDO_REGISTER - 1;
+ regno > last_movem_reg;
+ regno--)
+ if (cris_reg_saved_in_regsave_area (regno, got_really_used))
+ {
+ rtx insn;
+
+ if (argspace_offset)
+ {
+ /* There is an area for outgoing parameters located before
+ the saved registers. We have to adjust for that. */
+ emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ argspace_offset)));
+ /* Make sure we only do this once. */
+ argspace_offset = 0;
+ }
+
+ mem = gen_rtx_MEM (SImode, gen_rtx_POST_INC (SImode,
+ stack_pointer_rtx));
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = emit_move_insn (gen_rtx_raw_REG (SImode, regno), mem);
+
+ /* Whenever we emit insns with post-incremented addresses
+ ourselves, we must add a post-inc note manually. */
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, stack_pointer_rtx, REG_NOTES (insn));
+ }
+
+ /* If we have any movem-restore, do it now. */
+ if (last_movem_reg != -1)
+ {
+ rtx insn;
+
+ if (argspace_offset)
+ {
+ emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx,
+ argspace_offset)));
+ argspace_offset = 0;
}
- output_addr_const (file, x);
- break;
+ mem = gen_rtx_MEM (SImode,
+ gen_rtx_POST_INC (SImode, stack_pointer_rtx));
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn
+ = emit_insn (cris_gen_movem_load (mem,
+ GEN_INT (last_movem_reg + 1), 0));
+ /* Whenever we emit insns with post-incremented addresses
+ ourselves, we must add a post-inc note manually. */
+ if (side_effects_p (PATTERN (insn)))
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, stack_pointer_rtx, REG_NOTES (insn));
+ }
- case NOTE:
- if (NOTE_LINE_NUMBER (x) != NOTE_INSN_DELETED_LABEL)
- fatal_insn ("unexpected NOTE as addr_const:", x);
- case CODE_LABEL:
- case CONST_INT:
- case CONST_DOUBLE:
- case ZERO_EXTEND:
- case SIGN_EXTEND:
- output_addr_const (file, x);
- break;
+ /* If we don't clobber all of the allocated stack area (we've already
+ deallocated saved registers), GCC might want to schedule loads from
+ the stack to *after* the stack-pointer restore, which introduces an
+ interrupt race condition. This happened for the initial-value
+ SRP-restore for g++.dg/eh/registers1.C (noticed by inspection of
+ other failure for that test). It also happened for the stack slot
+ for the return value in (one version of)
+ linux/fs/dcache.c:__d_lookup, at least with "-O2
+ -fno-omit-frame-pointer". */
- case CONST:
- /* This used to output parentheses around the expression,
- but that does not work on the 386 (either ATT or BSD assembler). */
- cris_output_addr_const (file, XEXP (x, 0));
- break;
+ /* Restore frame pointer if necessary. */
+ if (frame_pointer_needed)
+ {
+ rtx insn;
- case PLUS:
- /* Some assemblers need integer constants to appear last (e.g. masm). */
- if (GET_CODE (XEXP (x, 0)) == CONST_INT)
+ emit_insn (gen_cris_frame_deallocated_barrier ());
+
+ emit_move_insn (stack_pointer_rtx, frame_pointer_rtx);
+ mem = gen_rtx_MEM (SImode, gen_rtx_POST_INC (SImode,
+ stack_pointer_rtx));
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = emit_move_insn (frame_pointer_rtx, mem);
+
+ /* Whenever we emit insns with post-incremented addresses
+ ourselves, we must add a post-inc note manually. */
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, stack_pointer_rtx, REG_NOTES (insn));
+ }
+ else if ((size + argspace_offset) != 0)
+ {
+ emit_insn (gen_cris_frame_deallocated_barrier ());
+
+ /* If there was no frame-pointer to restore sp from, we must
+ explicitly deallocate local variables. */
+
+ /* Handle space for outgoing parameters that hasn't been handled
+ yet. */
+ size += argspace_offset;
+
+ emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx, size)));
+ }
+
+ /* If this function has no pushed register parameters
+ (stdargs/varargs), and if it is not a leaf function, then we have
+ the return address on the stack. */
+ if (return_address_on_stack && pretend == 0)
+ {
+ if (current_function_calls_eh_return)
{
- cris_output_addr_const (file, XEXP (x, 1));
- if (INTVAL (XEXP (x, 0)) >= 0)
- fprintf (file, "+");
- output_addr_const (file, XEXP (x, 0));
+ rtx mem;
+ rtx insn;
+ rtx srpreg = gen_rtx_raw_REG (SImode, CRIS_SRP_REGNUM);
+ mem = gen_rtx_MEM (SImode,
+ gen_rtx_POST_INC (SImode,
+ stack_pointer_rtx));
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = emit_move_insn (srpreg, mem);
+
+ /* Whenever we emit insns with post-incremented addresses
+ ourselves, we must add a post-inc note manually. */
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, stack_pointer_rtx, REG_NOTES (insn));
+
+ emit_insn (gen_addsi3 (stack_pointer_rtx,
+ stack_pointer_rtx,
+ gen_rtx_raw_REG (SImode,
+ CRIS_STACKADJ_REG)));
+ cris_expand_return (false);
}
else
+ cris_expand_return (true);
+
+ return;
+ }
+
+ /* If we pushed some register parameters, then adjust the stack for
+ them. */
+ if (pretend != 0)
+ {
+ /* If SRP is stored on the way, we need to restore it first. */
+ if (return_address_on_stack)
{
- cris_output_addr_const (file, XEXP (x, 0));
- if (GET_CODE (XEXP (x, 1)) != CONST_INT
- || INTVAL (XEXP (x, 1)) >= 0)
- fprintf (file, "+");
- cris_output_addr_const (file, XEXP (x, 1));
+ rtx mem;
+ rtx srpreg = gen_rtx_raw_REG (SImode, CRIS_SRP_REGNUM);
+ rtx insn;
+
+ mem = gen_rtx_MEM (SImode,
+ gen_rtx_POST_INC (SImode,
+ stack_pointer_rtx));
+ set_mem_alias_set (mem, get_frame_alias_set ());
+ insn = emit_move_insn (srpreg, mem);
+
+ /* Whenever we emit insns with post-incremented addresses
+ ourselves, we must add a post-inc note manually. */
+ REG_NOTES (insn)
+ = alloc_EXPR_LIST (REG_INC, stack_pointer_rtx, REG_NOTES (insn));
}
- break;
- case MINUS:
- /* Avoid outputting things like x-x or x+5-x,
- since some assemblers can't handle that. */
- x = simplify_subtraction (x);
- if (GET_CODE (x) != MINUS)
- goto restart;
-
- cris_output_addr_const (file, XEXP (x, 0));
- fprintf (file, "-");
- if ((GET_CODE (XEXP (x, 1)) == CONST_INT
- && INTVAL (XEXP (x, 1)) < 0)
- || GET_CODE (XEXP (x, 1)) != CONST_INT)
+ emit_insn (gen_rtx_SET (VOIDmode,
+ stack_pointer_rtx,
+ plus_constant (stack_pointer_rtx, pretend)));
+ }
+
+ /* Perform the "physical" unwinding that the EH machinery calculated. */
+ if (current_function_calls_eh_return)
+ emit_insn (gen_addsi3 (stack_pointer_rtx,
+ stack_pointer_rtx,
+ gen_rtx_raw_REG (SImode,
+ CRIS_STACKADJ_REG)));
+ cris_expand_return (false);
+}
+
+/* Worker function for generating movem from mem for load_multiple. */
+
+rtx
+cris_gen_movem_load (rtx src, rtx nregs_rtx, int nprefix)
+{
+ int nregs = INTVAL (nregs_rtx);
+ rtvec vec;
+ int eltno = 1;
+ int i;
+ rtx srcreg = XEXP (src, 0);
+ unsigned int regno = nregs - 1;
+ int regno_inc = -1;
+
+ if (GET_CODE (srcreg) == POST_INC)
+ srcreg = XEXP (srcreg, 0);
+
+ CRIS_ASSERT (REG_P (srcreg));
+
+ /* Don't use movem for just one insn. The insns are equivalent except
+ for the pipeline hazard (on v32); movem does not forward the loaded
+ registers so there's a three cycles penalty for their use. */
+ if (nregs == 1)
+ return gen_movsi (gen_rtx_REG (SImode, 0), src);
+
+ vec = rtvec_alloc (nprefix + nregs
+ + (GET_CODE (XEXP (src, 0)) == POST_INC));
+
+ if (GET_CODE (XEXP (src, 0)) == POST_INC)
+ {
+ RTVEC_ELT (vec, nprefix + 1)
+ = gen_rtx_SET (VOIDmode, srcreg, plus_constant (srcreg, nregs * 4));
+ eltno++;
+ }
+
+ src = replace_equiv_address (src, srcreg);
+ RTVEC_ELT (vec, nprefix)
+ = gen_rtx_SET (VOIDmode, gen_rtx_REG (SImode, regno), src);
+ regno += regno_inc;
+
+ for (i = 1; i < nregs; i++, eltno++)
+ {
+ RTVEC_ELT (vec, nprefix + eltno)
+ = gen_rtx_SET (VOIDmode, gen_rtx_REG (SImode, regno),
+ adjust_address_nv (src, SImode, i * 4));
+ regno += regno_inc;
+ }
+
+ return gen_rtx_PARALLEL (VOIDmode, vec);
+}
+
+/* Worker function for generating movem to mem. If FRAME_RELATED, notes
+ are added that the dwarf2 machinery understands. */
+
+rtx
+cris_emit_movem_store (rtx dest, rtx nregs_rtx, int increment,
+ bool frame_related)
+{
+ int nregs = INTVAL (nregs_rtx);
+ rtvec vec;
+ int eltno = 1;
+ int i;
+ rtx insn;
+ rtx destreg = XEXP (dest, 0);
+ unsigned int regno = nregs - 1;
+ int regno_inc = -1;
+
+ if (GET_CODE (destreg) == POST_INC)
+ increment += nregs * 4;
+
+ if (GET_CODE (destreg) == POST_INC || GET_CODE (destreg) == PLUS)
+ destreg = XEXP (destreg, 0);
+
+ CRIS_ASSERT (REG_P (destreg));
+
+ /* Don't use movem for just one insn. The insns are equivalent except
+ for the pipeline hazard (on v32); movem does not forward the loaded
+ registers so there's a three cycles penalty for use. */
+ if (nregs == 1)
+ {
+ rtx mov = gen_rtx_SET (VOIDmode, dest, gen_rtx_REG (SImode, 0));
+
+ if (increment == 0)
+ {
+ insn = emit_insn (mov);
+ if (frame_related)
+ RTX_FRAME_RELATED_P (insn) = 1;
+ return insn;
+ }
+
+ /* If there was a request for a side-effect, create the ordinary
+ parallel. */
+ vec = rtvec_alloc (2);
+
+ RTVEC_ELT (vec, 0) = mov;
+ RTVEC_ELT (vec, 1) = gen_rtx_SET (VOIDmode, destreg,
+ plus_constant (destreg, increment));
+ if (frame_related)
+ {
+ RTX_FRAME_RELATED_P (mov) = 1;
+ RTX_FRAME_RELATED_P (RTVEC_ELT (vec, 1)) = 1;
+ }
+ }
+ else
+ {
+ vec = rtvec_alloc (nregs + (increment != 0 ? 1 : 0));
+ RTVEC_ELT (vec, 0)
+ = gen_rtx_SET (VOIDmode,
+ replace_equiv_address (dest,
+ plus_constant (destreg,
+ increment)),
+ gen_rtx_REG (SImode, regno));
+ regno += regno_inc;
+
+ /* The dwarf2 info wants this mark on each component in a parallel
+ that's part of the prologue (though it's optional on the first
+ component). */
+ if (frame_related)
+ RTX_FRAME_RELATED_P (RTVEC_ELT (vec, 0)) = 1;
+
+ if (increment != 0)
+ {
+ RTVEC_ELT (vec, 1)
+ = gen_rtx_SET (VOIDmode, destreg,
+ plus_constant (destreg,
+ increment != 0
+ ? increment : nregs * 4));
+ eltno++;
+
+ if (frame_related)
+ RTX_FRAME_RELATED_P (RTVEC_ELT (vec, 1)) = 1;
+
+ /* Don't call adjust_address_nv on a post-incremented address if
+ we can help it. */
+ if (GET_CODE (XEXP (dest, 0)) == POST_INC)
+ dest = replace_equiv_address (dest, destreg);
+ }
+
+ for (i = 1; i < nregs; i++, eltno++)
{
- fprintf (file, "%s", targetm.asm_out.open_paren);
- cris_output_addr_const (file, XEXP (x, 1));
- fprintf (file, "%s", targetm.asm_out.close_paren);
+ RTVEC_ELT (vec, eltno)
+ = gen_rtx_SET (VOIDmode, adjust_address_nv (dest, SImode, i * 4),
+ gen_rtx_REG (SImode, regno));
+ if (frame_related)
+ RTX_FRAME_RELATED_P (RTVEC_ELT (vec, eltno)) = 1;
+ regno += regno_inc;
+ }
+ }
+
+ insn = emit_insn (gen_rtx_PARALLEL (VOIDmode, vec));
+
+ /* Because dwarf2out.c handles the insns in a parallel as a sequence,
+ we need to keep the stack adjustment separate, after the
+ MEM-setters. Else the stack-adjustment in the second component of
+ the parallel would be mishandled; the offsets for the SETs that
+ follow it would be wrong. We prepare for this by adding a
+ REG_FRAME_RELATED_EXPR with the MEM-setting parts in a SEQUENCE
+ followed by the increment. Note that we have FRAME_RELATED_P on
+ all the SETs, including the original stack adjustment SET in the
+ parallel. */
+ if (frame_related)
+ {
+ if (increment != 0)
+ {
+ rtx seq = gen_rtx_SEQUENCE (VOIDmode, rtvec_alloc (nregs + 1));
+ XVECEXP (seq, 0, 0) = copy_rtx (XVECEXP (PATTERN (insn), 0, 0));
+ for (i = 1; i < nregs; i++)
+ XVECEXP (seq, 0, i)
+ = copy_rtx (XVECEXP (PATTERN (insn), 0, i + 1));
+ XVECEXP (seq, 0, nregs) = copy_rtx (XVECEXP (PATTERN (insn), 0, 1));
+ REG_NOTES (insn)
+ = gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR, seq,
+ REG_NOTES (insn));
+ }
+
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+
+ return insn;
+}
+
+/* Worker function for expanding the address for PIC function calls. */
+
+void
+cris_expand_pic_call_address (rtx *opp)
+{
+ rtx op = *opp;
+
+ gcc_assert (MEM_P (op));
+ op = XEXP (op, 0);
+
+ /* It might be that code can be generated that jumps to 0 (or to a
+ specific address). Don't die on that. (There is a
+ testcase.) */
+ if (CONSTANT_ADDRESS_P (op) && !CONST_INT_P (op))
+ {
+ enum cris_pic_symbol_type t = cris_pic_symbol_type_of (op);
+
+ CRIS_ASSERT (can_create_pseudo_p ());
+
+ /* For local symbols (non-PLT), just get the plain symbol
+ reference into a register. For symbols that can be PLT, make
+ them PLT. */
+ if (t == cris_gotrel_symbol)
+ op = force_reg (Pmode, op);
+ else if (t == cris_got_symbol)
+ {
+ if (TARGET_AVOID_GOTPLT)
+ {
+ /* Change a "jsr sym" into (allocate register rM, rO)
+ "move.d (const (unspec [sym] CRIS_UNSPEC_PLT)),rM"
+ "add.d rPIC,rM,rO", "jsr rO". */
+ rtx tem, rm, ro;
+ gcc_assert (can_create_pseudo_p ());
+ current_function_uses_pic_offset_table = 1;
+ tem = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, op), CRIS_UNSPEC_PLT);
+ rm = gen_reg_rtx (Pmode);
+ emit_move_insn (rm, gen_rtx_CONST (Pmode, tem));
+ ro = gen_reg_rtx (Pmode);
+ if (expand_binop (Pmode, add_optab, rm,
+ pic_offset_table_rtx,
+ ro, 0, OPTAB_LIB_WIDEN) != ro)
+ internal_error ("expand_binop failed in movsi got");
+ op = ro;
+ }
+ else
+ {
+ /* Change a "jsr sym" into (allocate register rM, rO)
+ "move.d (const (unspec [sym] CRIS_UNSPEC_PLTGOT)),rM"
+ "add.d rPIC,rM,rO" "jsr [rO]" with the memory access
+ marked as not trapping and not aliasing. No "move.d
+ [rO],rP" as that would invite to re-use of a value
+ that should not be reused. FIXME: Need a peephole2
+ for cases when this is cse:d from the call, to change
+ back to just get the PLT entry address, so we don't
+ resolve the same symbol over and over (the memory
+ access of the PLTGOT isn't constant). */
+ rtx tem, mem, rm, ro;
+
+ gcc_assert (can_create_pseudo_p ());
+ current_function_uses_pic_offset_table = 1;
+ tem = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, op),
+ CRIS_UNSPEC_PLTGOTREAD);
+ rm = gen_reg_rtx (Pmode);
+ emit_move_insn (rm, gen_rtx_CONST (Pmode, tem));
+ ro = gen_reg_rtx (Pmode);
+ if (expand_binop (Pmode, add_optab, rm,
+ pic_offset_table_rtx,
+ ro, 0, OPTAB_LIB_WIDEN) != ro)
+ internal_error ("expand_binop failed in movsi got");
+ mem = gen_rtx_MEM (Pmode, ro);
+
+ /* This MEM doesn't alias anything. Whether it aliases
+ other same symbols is unimportant. */
+ set_mem_alias_set (mem, new_alias_set ());
+ MEM_NOTRAP_P (mem) = 1;
+ op = mem;
+ }
}
else
- output_addr_const (file, XEXP (x, 1));
- break;
+ /* Can't possibly get a GOT-needing-fixup for a function-call,
+ right? */
+ fatal_insn ("Unidentifiable call op", op);
+
+ *opp = replace_equiv_address (*opp, op);
+ }
+}
+
+/* Make sure operands are in the right order for an addsi3 insn as
+ generated by a define_split. A MEM as the first operand isn't
+ recognized by addsi3 after reload. OPERANDS contains the operands,
+ with the first at OPERANDS[N] and the second at OPERANDS[N+1]. */
+
+void
+cris_order_for_addsi3 (rtx *operands, int n)
+{
+ if (MEM_P (operands[n]))
+ {
+ rtx tem = operands[n];
+ operands[n] = operands[n + 1];
+ operands[n + 1] = tem;
+ }
+}
+
+/* Use from within code, from e.g. PRINT_OPERAND and
+ PRINT_OPERAND_ADDRESS. Macros used in output_addr_const need to emit
+ different things depending on whether code operand or constant is
+ emitted. */
+
+static void
+cris_output_addr_const (FILE *file, rtx x)
+{
+ in_code++;
+ output_addr_const (file, x);
+ in_code--;
+}
+
+/* Worker function for ASM_OUTPUT_SYMBOL_REF. */
+
+void
+cris_asm_output_symbol_ref (FILE *file, rtx x)
+{
+ gcc_assert (GET_CODE (x) == SYMBOL_REF);
+
+ if (flag_pic && in_code > 0)
+ {
+ const char *origstr = XSTR (x, 0);
+ const char *str;
+ str = (* targetm.strip_name_encoding) (origstr);
+ assemble_name (file, str);
+
+ /* Sanity check. */
+ if (! current_function_uses_pic_offset_table)
+ output_operand_lossage ("PIC register isn't set up");
+ }
+ else
+ assemble_name (file, XSTR (x, 0));
+}
+
+/* Worker function for ASM_OUTPUT_LABEL_REF. */
+
+void
+cris_asm_output_label_ref (FILE *file, char *buf)
+{
+ if (flag_pic && in_code > 0)
+ {
+ assemble_name (file, buf);
+
+ /* Sanity check. */
+ if (! current_function_uses_pic_offset_table)
+ internal_error ("emitting PIC operand, but PIC register isn't set up");
+ }
+ else
+ assemble_name (file, buf);
+}
+
+/* Worker function for OUTPUT_ADDR_CONST_EXTRA. */
+
+bool
+cris_output_addr_const_extra (FILE *file, rtx xconst)
+{
+ switch (GET_CODE (xconst))
+ {
+ rtx x;
+
+ case UNSPEC:
+ x = XVECEXP (xconst, 0, 0);
+ CRIS_ASSERT (GET_CODE (x) == SYMBOL_REF
+ || GET_CODE (x) == LABEL_REF
+ || GET_CODE (x) == CONST);
+ output_addr_const (file, x);
+ switch (XINT (xconst, 1))
+ {
+ case CRIS_UNSPEC_PLT:
+ fprintf (file, ":PLTG");
+ break;
+
+ case CRIS_UNSPEC_GOTREL:
+ fprintf (file, ":GOTOFF");
+ break;
+
+ case CRIS_UNSPEC_GOTREAD:
+ if (flag_pic == 1)
+ fprintf (file, ":GOT16");
+ else
+ fprintf (file, ":GOT");
+ break;
+
+ case CRIS_UNSPEC_PLTGOTREAD:
+ if (flag_pic == 1)
+ fprintf (file, CRIS_GOTPLT_SUFFIX "16");
+ else
+ fprintf (file, CRIS_GOTPLT_SUFFIX);
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ return true;
default:
- LOSE_AND_RETURN ("unexpected address expression", x);
+ return false;
}
}
int second_time)
{
if (ca->regs < CRIS_MAX_ARGS_IN_REGS)
- *pretend_arg_size = (CRIS_MAX_ARGS_IN_REGS - ca->regs) * 4;
- if (TARGET_PDEBUG)
{
- fprintf (asm_out_file,
- "\n; VA:: ANSI: %d args before, anon @ #%d, %dtime\n",
- ca->regs, *pretend_arg_size, second_time);
+ int stdarg_regs = CRIS_MAX_ARGS_IN_REGS - ca->regs;
+ cfun->machine->stdarg_regs = stdarg_regs;
+ *pretend_arg_size = stdarg_regs * 4;
}
+
+ if (TARGET_PDEBUG)
+ fprintf (asm_out_file,
+ "\n; VA:: ANSI: %d args before, anon @ #%d, %dtime\n",
+ ca->regs, *pretend_arg_size, second_time);
}
/* Return true if TYPE must be passed by invisible reference.
static bool
cris_pass_by_reference (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED,
- enum machine_mode mode, tree type,
+ enum machine_mode mode, const_tree type,
bool named ATTRIBUTE_UNUSED)
{
return (targetm.calls.must_pass_in_stack (mode, type)
}
+static int
+cris_arg_partial_bytes (CUMULATIVE_ARGS *ca, enum machine_mode mode,
+ tree type, bool named ATTRIBUTE_UNUSED)
+{
+ if (ca->regs == CRIS_MAX_ARGS_IN_REGS - 1
+ && !targetm.calls.must_pass_in_stack (mode, type)
+ && CRIS_FUNCTION_ARG_SIZE (mode, type) > 4
+ && CRIS_FUNCTION_ARG_SIZE (mode, type) <= 8)
+ return UNITS_PER_WORD;
+ else
+ return 0;
+}
+
+/* Worker function for TARGET_MD_ASM_CLOBBERS. */
+
+static tree
+cris_md_asm_clobbers (tree outputs, tree inputs, tree in_clobbers)
+{
+ HARD_REG_SET mof_set;
+ tree clobbers;
+ tree t;
+
+ CLEAR_HARD_REG_SET (mof_set);
+ SET_HARD_REG_BIT (mof_set, CRIS_MOF_REGNUM);
+
+ /* For the time being, all asms clobber condition codes. Revisit when
+ there's a reasonable use for inputs/outputs that mention condition
+ codes. */
+ clobbers
+ = tree_cons (NULL_TREE,
+ build_string (strlen (reg_names[CRIS_CC0_REGNUM]),
+ reg_names[CRIS_CC0_REGNUM]),
+ in_clobbers);
+
+ for (t = outputs; t != NULL; t = TREE_CHAIN (t))
+ {
+ tree val = TREE_VALUE (t);
+
+ /* The constraint letter for the singleton register class of MOF
+ is 'h'. If it's mentioned in the constraints, the asm is
+ MOF-aware and adding it to the clobbers would cause it to have
+ impossible constraints. */
+ if (strchr (TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))),
+ 'h') != NULL
+ || tree_overlaps_hard_reg_set (val, &mof_set) != NULL_TREE)
+ return clobbers;
+ }
+
+ for (t = inputs; t != NULL; t = TREE_CHAIN (t))
+ {
+ tree val = TREE_VALUE (t);
+
+ if (strchr (TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))),
+ 'h') != NULL
+ || tree_overlaps_hard_reg_set (val, &mof_set) != NULL_TREE)
+ return clobbers;
+ }
+
+ return tree_cons (NULL_TREE,
+ build_string (strlen (reg_names[CRIS_MOF_REGNUM]),
+ reg_names[CRIS_MOF_REGNUM]),
+ clobbers);
+}
+
#if 0
/* Various small functions to replace macros. Only called from a
debugger. They might collide with gcc functions or system functions,
OSDN Git Service
