-/* Subroutines used for code generation on the Mitsubishi M32R cpu.
- Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+/* Subroutines used for code generation on the Renesas M32R cpu.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ 2005 Free Software Foundation, Inc.
-This file is part of GNU CC.
+ This file is part of GCC.
-GNU CC 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)
-any later version.
+ 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) any later version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ GCC is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+ License for more details.
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+ 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. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "rtl.h"
#include "regs.h"
#include "real.h"
#include "insn-config.h"
#include "conditions.h"
-#include "insn-flags.h"
#include "output.h"
#include "insn-attr.h"
#include "flags.h"
#include "function.h"
#include "recog.h"
#include "toplev.h"
-#include "m32r-protos.h"
+#include "ggc.h"
+#include "integrate.h"
+#include "tm_p.h"
+#include "target.h"
+#include "target-def.h"
/* Save the operands last given to a compare for use when we
generate a scc or bcc insn. */
const char * m32r_sdata_string = M32R_SDATA_DEFAULT;
enum m32r_sdata m32r_sdata;
-/* Scheduler support */
-int m32r_sched_odd_word_p;
+/* Machine-specific symbol_ref flags. */
+#define SYMBOL_FLAG_MODEL_SHIFT SYMBOL_FLAG_MACH_DEP_SHIFT
+#define SYMBOL_REF_MODEL(X) \
+ ((enum m32r_model) ((SYMBOL_REF_FLAGS (X) >> SYMBOL_FLAG_MODEL_SHIFT) & 3))
+
+/* For string literals, etc. */
+#define LIT_NAME_P(NAME) ((NAME)[0] == '*' && (NAME)[1] == '.')
+
+/* Cache-flush support. Cache-flush is used at trampoline.
+ Default cache-flush is "trap 12".
+ default cache-flush function is "_flush_cache" (CACHE_FLUSH_FUNC)
+ default cache-flush trap-interrupt number is "12". (CACHE_FLUSH_TRAP)
+ You can change how to generate code of cache-flush with following options.
+ -flush-func=FLUSH-FUNC-NAME
+ -no-flush-func
+ -fluch-trap=TRAP-NUMBER
+ -no-flush-trap. */
+const char *m32r_cache_flush_func = CACHE_FLUSH_FUNC;
+const char *m32r_cache_flush_trap_string = CACHE_FLUSH_TRAP;
+int m32r_cache_flush_trap = 12;
/* Forward declaration. */
-static void init_reg_tables PARAMS ((void));
-
+static void init_reg_tables (void);
+static void block_move_call (rtx, rtx, rtx);
+static int m32r_is_insn (rtx);
+const struct attribute_spec m32r_attribute_table[];
+static tree m32r_handle_model_attribute (tree *, tree, tree, int, bool *);
+static void m32r_output_function_prologue (FILE *, HOST_WIDE_INT);
+static void m32r_output_function_epilogue (FILE *, HOST_WIDE_INT);
+
+static void m32r_file_start (void);
+
+static int m32r_adjust_priority (rtx, int);
+static int m32r_issue_rate (void);
+
+static void m32r_encode_section_info (tree, rtx, int);
+static bool m32r_in_small_data_p (tree);
+static bool m32r_return_in_memory (tree, tree);
+static void m32r_setup_incoming_varargs (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, int *, int);
+static void init_idents (void);
+static bool m32r_rtx_costs (rtx, int, int, int *);
+static bool m32r_pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
+static int m32r_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
+\f
+/* Initialize the GCC target structure. */
+#undef TARGET_ATTRIBUTE_TABLE
+#define TARGET_ATTRIBUTE_TABLE m32r_attribute_table
+
+#undef TARGET_ASM_ALIGNED_HI_OP
+#define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t"
+#undef TARGET_ASM_ALIGNED_SI_OP
+#define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
+
+#undef TARGET_ASM_FUNCTION_PROLOGUE
+#define TARGET_ASM_FUNCTION_PROLOGUE m32r_output_function_prologue
+#undef TARGET_ASM_FUNCTION_EPILOGUE
+#define TARGET_ASM_FUNCTION_EPILOGUE m32r_output_function_epilogue
+
+#undef TARGET_ASM_FILE_START
+#define TARGET_ASM_FILE_START m32r_file_start
+
+#undef TARGET_SCHED_ADJUST_PRIORITY
+#define TARGET_SCHED_ADJUST_PRIORITY m32r_adjust_priority
+#undef TARGET_SCHED_ISSUE_RATE
+#define TARGET_SCHED_ISSUE_RATE m32r_issue_rate
+
+#undef TARGET_ENCODE_SECTION_INFO
+#define TARGET_ENCODE_SECTION_INFO m32r_encode_section_info
+#undef TARGET_IN_SMALL_DATA_P
+#define TARGET_IN_SMALL_DATA_P m32r_in_small_data_p
+
+#undef TARGET_RTX_COSTS
+#define TARGET_RTX_COSTS m32r_rtx_costs
+#undef TARGET_ADDRESS_COST
+#define TARGET_ADDRESS_COST hook_int_rtx_0
+
+#undef TARGET_PROMOTE_PROTOTYPES
+#define TARGET_PROMOTE_PROTOTYPES hook_bool_tree_true
+#undef TARGET_RETURN_IN_MEMORY
+#define TARGET_RETURN_IN_MEMORY m32r_return_in_memory
+#undef TARGET_SETUP_INCOMING_VARARGS
+#define TARGET_SETUP_INCOMING_VARARGS m32r_setup_incoming_varargs
+#undef TARGET_MUST_PASS_IN_STACK
+#define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size
+#undef TARGET_PASS_BY_REFERENCE
+#define TARGET_PASS_BY_REFERENCE m32r_pass_by_reference
+#undef TARGET_ARG_PARTIAL_BYTES
+#define TARGET_ARG_PARTIAL_BYTES m32r_arg_partial_bytes
+
+struct gcc_target targetm = TARGET_INITIALIZER;
+\f
/* Called by OVERRIDE_OPTIONS to initialize various things. */
void
-m32r_init ()
+m32r_init (void)
{
init_reg_tables ();
m32r_sdata = M32R_SDATA_USE;
else
error ("bad value (%s) for -msdata switch", m32r_sdata_string);
+
+ if (m32r_cache_flush_trap_string)
+ {
+ /* Change trap-number (12) for cache-flush to the others (0 - 15). */
+ m32r_cache_flush_trap = atoi (m32r_cache_flush_trap_string);
+ if (m32r_cache_flush_trap < 0 || m32r_cache_flush_trap > 15)
+ error ("bad value (%s) for -flush-trap=n (0=<n<=15)",
+ m32r_cache_flush_trap_string);
+ }
}
/* Vectors to keep interesting information about registers where it can easily
/* Value is 1 if register/mode pair is acceptable on arc. */
-unsigned int m32r_hard_regno_mode_ok[FIRST_PSEUDO_REGISTER] =
+const unsigned int m32r_hard_regno_mode_ok[FIRST_PSEUDO_REGISTER] =
{
T_MODES, T_MODES, T_MODES, T_MODES, T_MODES, T_MODES, T_MODES, T_MODES,
T_MODES, T_MODES, T_MODES, T_MODES, T_MODES, S_MODES, S_MODES, S_MODES,
- S_MODES, C_MODES, A_MODES
+ S_MODES, C_MODES, A_MODES, A_MODES
};
unsigned int m32r_mode_class [NUM_MACHINE_MODES];
enum reg_class m32r_regno_reg_class[FIRST_PSEUDO_REGISTER];
static void
-init_reg_tables ()
+init_reg_tables (void)
{
int i;
m32r_mode_class[i] = 0;
break;
case MODE_CC:
+ m32r_mode_class[i] = 1 << (int) C_MODE;
+ break;
default:
- /* mode_class hasn't been initialized yet for EXTRA_CC_MODES, so
- we must explicitly check for them here. */
- if (i == (int) CCmode)
- m32r_mode_class[i] = 1 << (int) C_MODE;
- else
- m32r_mode_class[i] = 0;
+ m32r_mode_class[i] = 0;
break;
}
}
medium: addresses use 32 bits, use bl to make calls
large: addresses use 32 bits, use seth/add3/jl to make calls
- Grep for MODEL in m32r.h for more info.
-*/
+ Grep for MODEL in m32r.h for more info. */
-static tree interrupt_ident1;
-static tree interrupt_ident2;
-static tree model_ident1;
-static tree model_ident2;
static tree small_ident1;
static tree small_ident2;
static tree medium_ident1;
static tree large_ident2;
static void
-init_idents PARAMS ((void))
+init_idents (void)
{
- if (interrupt_ident1 == 0)
+ if (small_ident1 == 0)
{
- interrupt_ident1 = get_identifier ("interrupt");
- interrupt_ident2 = get_identifier ("__interrupt__");
- model_ident1 = get_identifier ("model");
- model_ident2 = get_identifier ("__model__");
small_ident1 = get_identifier ("small");
small_ident2 = get_identifier ("__small__");
medium_ident1 = get_identifier ("medium");
}
}
-/* Return nonzero if IDENTIFIER is a valid decl attribute. */
-
-int
-m32r_valid_machine_decl_attribute (type, attributes, identifier, args)
- tree type ATTRIBUTE_UNUSED;
- tree attributes ATTRIBUTE_UNUSED;
- tree identifier;
- tree args;
-{
- init_idents ();
-
- if ((identifier == interrupt_ident1
- || identifier == interrupt_ident2)
- && list_length (args) == 0)
- return 1;
-
- if ((identifier == model_ident1
- || identifier == model_ident2)
- && list_length (args) == 1
- && (TREE_VALUE (args) == small_ident1
- || TREE_VALUE (args) == small_ident2
- || TREE_VALUE (args) == medium_ident1
- || TREE_VALUE (args) == medium_ident2
- || TREE_VALUE (args) == large_ident1
- || TREE_VALUE (args) == large_ident2))
- return 1;
-
- return 0;
-}
-
-/* Return zero if TYPE1 and TYPE are incompatible, one if they are compatible,
- and two if they are nearly compatible (which causes a warning to be
- generated). */
-
-int
-m32r_comp_type_attributes (type1, type2)
- tree type1 ATTRIBUTE_UNUSED;
- tree type2 ATTRIBUTE_UNUSED;
+const struct attribute_spec m32r_attribute_table[] =
{
- return 1;
-}
+ /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
+ { "interrupt", 0, 0, true, false, false, NULL },
+ { "model", 1, 1, true, false, false, m32r_handle_model_attribute },
+ { NULL, 0, 0, false, false, false, NULL }
+};
-/* Set the default attributes for TYPE. */
-void
-m32r_set_default_type_attributes (type)
- tree type ATTRIBUTE_UNUSED;
+/* Handle an "model" attribute; arguments as in
+ struct attribute_spec.handler. */
+static tree
+m32r_handle_model_attribute (tree *node ATTRIBUTE_UNUSED, tree name,
+ tree args, int flags ATTRIBUTE_UNUSED,
+ bool *no_add_attrs)
{
-}
-\f
-/* A C statement or statements to switch to the appropriate
- section for output of DECL. DECL is either a `VAR_DECL' node
- or a constant of some sort. RELOC indicates whether forming
- the initial value of DECL requires link-time relocations. */
+ tree arg;
-void
-m32r_select_section (decl, reloc)
- tree decl;
- int reloc;
-{
- if (TREE_CODE (decl) == STRING_CST)
- {
- if (! flag_writable_strings)
- const_section ();
- else
- data_section ();
- }
- else if (TREE_CODE (decl) == VAR_DECL)
+ init_idents ();
+ arg = TREE_VALUE (args);
+
+ if (arg != small_ident1
+ && arg != small_ident2
+ && arg != medium_ident1
+ && arg != medium_ident2
+ && arg != large_ident1
+ && arg != large_ident2)
{
- if (SDATA_NAME_P (XSTR (XEXP (DECL_RTL (decl), 0), 0)))
- sdata_section ();
- else if ((flag_pic && reloc)
- || !TREE_READONLY (decl)
- || TREE_SIDE_EFFECTS (decl)
- || !DECL_INITIAL (decl)
- || (DECL_INITIAL (decl) != error_mark_node
- && !TREE_CONSTANT (DECL_INITIAL (decl))))
- data_section ();
- else
- const_section ();
+ warning ("invalid argument of %qs attribute",
+ IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
}
- else
- const_section ();
-}
+ return NULL_TREE;
+}
+\f
/* Encode section information of DECL, which is either a VAR_DECL,
FUNCTION_DECL, STRING_CST, CONSTRUCTOR, or ???.
For the M32R we want to record:
- whether the object lives in .sdata/.sbss.
- objects living in .sdata/.sbss are prefixed with SDATA_FLAG_CHAR
-
- what code model should be used to access the object
- small: recorded with no flag - for space efficiency since they'll
- be the most common
- medium: prefixed with MEDIUM_FLAG_CHAR
- large: prefixed with LARGE_FLAG_CHAR
*/
-void
-m32r_encode_section_info (decl)
- tree decl;
+static void
+m32r_encode_section_info (tree decl, rtx rtl, int first)
{
- char prefix = 0;
- tree model = 0;
+ int extra_flags = 0;
+ tree model_attr;
+ enum m32r_model model;
+
+ default_encode_section_info (decl, rtl, first);
+
+ if (!DECL_P (decl))
+ return;
- switch (TREE_CODE (decl))
+ model_attr = lookup_attribute ("model", DECL_ATTRIBUTES (decl));
+ if (model_attr)
{
- case VAR_DECL :
- case FUNCTION_DECL :
- model = lookup_attribute ("model", DECL_MACHINE_ATTRIBUTES (decl));
- break;
- case STRING_CST :
- case CONSTRUCTOR :
- /* ??? document all others that can appear here */
- default :
- return;
- }
+ tree id;
- /* Only mark the object as being small data area addressable if
- it hasn't been explicitly marked with a code model.
+ init_idents ();
- The user can explicitly put an object in the small data area with the
- section attribute. If the object is in sdata/sbss and marked with a
- code model do both [put the object in .sdata and mark it as being
- addressed with a specific code model - don't mark it as being addressed
- with an SDA reloc though]. This is ok and might be useful at times. If
- the object doesn't fit the linker will give an error. */
+ id = TREE_VALUE (TREE_VALUE (model_attr));
- if (! model)
+ if (id == small_ident1 || id == small_ident2)
+ model = M32R_MODEL_SMALL;
+ else if (id == medium_ident1 || id == medium_ident2)
+ model = M32R_MODEL_MEDIUM;
+ else if (id == large_ident1 || id == large_ident2)
+ model = M32R_MODEL_LARGE;
+ else
+ abort (); /* shouldn't happen */
+ }
+ else
{
- if (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd'
- && DECL_SECTION_NAME (decl) != NULL_TREE)
- {
- char *name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl));
- if (! strcmp (name, ".sdata") || ! strcmp (name, ".sbss"))
- {
-#if 0 /* ??? There's no reason to disallow this, is there? */
- if (TREE_READONLY (decl))
- error_with_decl (decl, "const objects cannot go in .sdata/.sbss");
-#endif
- prefix = SDATA_FLAG_CHAR;
- }
- }
+ if (TARGET_MODEL_SMALL)
+ model = M32R_MODEL_SMALL;
+ else if (TARGET_MODEL_MEDIUM)
+ model = M32R_MODEL_MEDIUM;
+ else if (TARGET_MODEL_LARGE)
+ model = M32R_MODEL_LARGE;
else
- {
- if (TREE_CODE (decl) == VAR_DECL
- && ! TREE_READONLY (decl)
- && ! TARGET_SDATA_NONE)
- {
- int size = int_size_in_bytes (TREE_TYPE (decl));
-
- if (size > 0 && size <= g_switch_value)
- prefix = SDATA_FLAG_CHAR;
- }
- }
+ abort (); /* shouldn't happen */
}
+ extra_flags |= model << SYMBOL_FLAG_MODEL_SHIFT;
- /* If data area not decided yet, check for a code model. */
- if (prefix == 0)
- {
- if (model)
- {
- tree id;
-
- init_idents ();
+ if (extra_flags)
+ SYMBOL_REF_FLAGS (XEXP (rtl, 0)) |= extra_flags;
+}
- id = TREE_VALUE (TREE_VALUE (model));
+/* Only mark the object as being small data area addressable if
+ it hasn't been explicitly marked with a code model.
- if (id == small_ident1 || id == small_ident2)
- ; /* don't mark the symbol specially */
- else if (id == medium_ident1 || id == medium_ident2)
- prefix = MEDIUM_FLAG_CHAR;
- else if (id == large_ident1 || id == large_ident2)
- prefix = LARGE_FLAG_CHAR;
- else
- abort (); /* shouldn't happen */
- }
- else
+ The user can explicitly put an object in the small data area with the
+ section attribute. If the object is in sdata/sbss and marked with a
+ code model do both [put the object in .sdata and mark it as being
+ addressed with a specific code model - don't mark it as being addressed
+ with an SDA reloc though]. This is ok and might be useful at times. If
+ the object doesn't fit the linker will give an error. */
+
+static bool
+m32r_in_small_data_p (tree decl)
+{
+ tree section;
+
+ if (TREE_CODE (decl) != VAR_DECL)
+ return false;
+
+ if (lookup_attribute ("model", DECL_ATTRIBUTES (decl)))
+ return false;
+
+ section = DECL_SECTION_NAME (decl);
+ if (section)
+ {
+ char *name = (char *) TREE_STRING_POINTER (section);
+ if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0)
+ return true;
+ }
+ else
+ {
+ if (! TREE_READONLY (decl) && ! TARGET_SDATA_NONE)
{
- if (TARGET_MODEL_SMALL)
- ; /* don't mark the symbol specially */
- else if (TARGET_MODEL_MEDIUM)
- prefix = MEDIUM_FLAG_CHAR;
- else if (TARGET_MODEL_LARGE)
- prefix = LARGE_FLAG_CHAR;
- else
- abort (); /* shouldn't happen */
+ int size = int_size_in_bytes (TREE_TYPE (decl));
+
+ if (size > 0 && (unsigned HOST_WIDE_INT) size <= g_switch_value)
+ return true;
}
}
- if (prefix != 0)
- {
- rtx rtl = (TREE_CODE_CLASS (TREE_CODE (decl)) != 'd'
- ? TREE_CST_RTL (decl) : DECL_RTL (decl));
- const char *str = XSTR (XEXP (rtl, 0), 0);
- int len = strlen (str);
- char *newstr = ggc_alloc (len + 2);
- strcpy (newstr + 1, str);
- *newstr = prefix;
- XSTR (XEXP (rtl, 0), 0) = newstr;
- }
+ return false;
}
/* Do anything needed before RTL is emitted for each function. */
void
-m32r_init_expanders ()
+m32r_init_expanders (void)
{
/* ??? At one point there was code here. The function is left in
to make it easy to experiment. */
}
\f
-/* Acceptable arguments to the call insn. */
-
int
-call_address_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- return symbolic_operand (op, mode);
-
-/* Constants and values in registers are not OK, because
- the m32r BL instruction can only support PC relative branching. */
-}
-
-int
-call_operand (op, mode)
- rtx op;
- enum machine_mode mode;
+call_operand (rtx op, enum machine_mode mode)
{
if (GET_CODE (op) != MEM)
return 0;
return call_address_operand (op, mode);
}
-/* Returns 1 if OP is a symbol reference. */
-
-int
-symbolic_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- switch (GET_CODE (op))
- {
- case SYMBOL_REF:
- case LABEL_REF:
- case CONST :
- return 1;
-
- default:
- return 0;
- }
-}
-
/* Return 1 if OP is a reference to an object in .sdata/.sbss. */
int
-small_data_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
+small_data_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
{
if (! TARGET_SDATA_USE)
return 0;
if (GET_CODE (op) == SYMBOL_REF)
- return SDATA_NAME_P (XSTR (op, 0));
+ return SYMBOL_REF_SMALL_P (op);
if (GET_CODE (op) == CONST
&& GET_CODE (XEXP (op, 0)) == PLUS
&& GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
&& GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT
&& INT16_P (INTVAL (XEXP (XEXP (op, 0), 1))))
- return SDATA_NAME_P (XSTR (XEXP (XEXP (op, 0), 0), 0));
+ return SYMBOL_REF_SMALL_P (XEXP (XEXP (op, 0), 0));
return 0;
}
/* Return 1 if OP is a symbol that can use 24 bit addressing. */
int
-addr24_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
+addr24_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
{
- if (GET_CODE (op) == LABEL_REF)
- return TARGET_ADDR24;
-
- if (GET_CODE (op) == SYMBOL_REF)
- return (SMALL_NAME_P (XSTR (op, 0))
- || (TARGET_ADDR24
- && (CONSTANT_POOL_ADDRESS_P (op)
- || LIT_NAME_P (XSTR (op, 0)))));
+ rtx sym;
- if (GET_CODE (op) == CONST
- && GET_CODE (XEXP (op, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
- && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT
- && UINT24_P (INTVAL (XEXP (XEXP (op, 0), 1))))
- {
- rtx sym = XEXP (XEXP (op, 0), 0);
- return (SMALL_NAME_P (XSTR (sym, 0))
- || (TARGET_ADDR24
- && (CONSTANT_POOL_ADDRESS_P (op)
- || LIT_NAME_P (XSTR (op, 0)))));
- }
-
- return 0;
-}
-
-/* Return 1 if OP is a symbol that needs 32 bit addressing. */
+ if (flag_pic)
+ return 0;
-int
-addr32_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
if (GET_CODE (op) == LABEL_REF)
- return TARGET_ADDR32;
-
- if (GET_CODE (op) == SYMBOL_REF)
- return (! addr24_operand (op, mode)
- && ! small_data_operand (op, mode));
-
- if (GET_CODE (op) == CONST
- && GET_CODE (XEXP (op, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
- && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
- {
- return (! addr24_operand (op, mode)
- && ! small_data_operand (op, mode));
- }
-
- return 0;
-}
-
-/* Return 1 if OP is a function that can be called with the `bl' insn. */
+ return TARGET_ADDR24;
-int
-call26_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
if (GET_CODE (op) == SYMBOL_REF)
- return ! LARGE_NAME_P (XSTR (op, 0));
-
- return TARGET_CALL26;
-}
-
-/* Returns 1 if OP is an acceptable operand for seth/add3. */
+ sym = op;
+ else if (GET_CODE (op) == CONST
+ && GET_CODE (XEXP (op, 0)) == PLUS
+ && GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
+ && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT
+ && UINT24_P (INTVAL (XEXP (XEXP (op, 0), 1))))
+ sym = XEXP (XEXP (op, 0), 0);
+ else
+ return 0;
-int
-seth_add3_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- if (GET_CODE (op) == SYMBOL_REF
- || GET_CODE (op) == LABEL_REF)
+ if (SYMBOL_REF_MODEL (sym) == M32R_MODEL_SMALL)
return 1;
- if (GET_CODE (op) == CONST
- && GET_CODE (XEXP (op, 0)) == PLUS
- && GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
- && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT
- && INT16_P (INTVAL (XEXP (XEXP (op, 0), 1))))
+ if (TARGET_ADDR24
+ && (CONSTANT_POOL_ADDRESS_P (sym)
+ || LIT_NAME_P (XSTR (sym, 0))))
return 1;
return 0;
}
-/* Return true if OP is a signed 8 bit immediate value. */
-
-int
-int8_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- if (GET_CODE (op) != CONST_INT)
- return 0;
- return INT8_P (INTVAL (op));
-}
-
-/* Return true if OP is a signed 16 bit immediate value
- useful in comparisons. */
-
-int
-cmp_int16_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- if (GET_CODE (op) != CONST_INT)
- return 0;
- return CMP_INT16_P (INTVAL (op));
-}
-
-/* Return true if OP is an unsigned 16 bit immediate value. */
-
-int
-uint16_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- if (GET_CODE (op) != CONST_INT)
- return 0;
- return UINT16_P (INTVAL (op));
-}
-
-/* Return true if OP is a register or signed 16 bit value. */
-
-int
-reg_or_int16_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- if (GET_CODE (op) == REG || GET_CODE (op) == SUBREG)
- return register_operand (op, mode);
- if (GET_CODE (op) != CONST_INT)
- return 0;
- return INT16_P (INTVAL (op));
-}
-
-/* Return true if OP is a register or an unsigned 16 bit value. */
-
-int
-reg_or_uint16_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- if (GET_CODE (op) == REG || GET_CODE (op) == SUBREG)
- return register_operand (op, mode);
- if (GET_CODE (op) != CONST_INT)
- return 0;
- return UINT16_P (INTVAL (op));
-}
-
-/* Return true if OP is a register or an integer value that can be
- used is SEQ/SNE. We can use either XOR of the value or ADD of
- the negative of the value for the constant. Don't allow 0,
- because that is special cased. */
+/* Return 1 if OP is a symbol that needs 32 bit addressing. */
int
-reg_or_eq_int16_operand (op, mode)
- rtx op;
- enum machine_mode mode;
+addr32_operand (rtx op, enum machine_mode mode)
{
- HOST_WIDE_INT value;
-
- if (GET_CODE (op) == REG || GET_CODE (op) == SUBREG)
- return register_operand (op, mode);
-
- if (GET_CODE (op) != CONST_INT)
- return 0;
+ rtx sym;
- value = INTVAL (op);
- return (value != 0) && (UINT16_P (value) || CMP_INT16_P (-value));
-}
-
-/* Return true if OP is a register or signed 16 bit value for compares. */
+ if (GET_CODE (op) == LABEL_REF)
+ return TARGET_ADDR32;
-int
-reg_or_cmp_int16_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- if (GET_CODE (op) == REG || GET_CODE (op) == SUBREG)
- return register_operand (op, mode);
- if (GET_CODE (op) != CONST_INT)
+ if (GET_CODE (op) == SYMBOL_REF)
+ sym = op;
+ else if (GET_CODE (op) == CONST
+ && GET_CODE (XEXP (op, 0)) == PLUS
+ && GET_CODE (XEXP (XEXP (op, 0), 0)) == SYMBOL_REF
+ && GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT
+ && ! flag_pic)
+ sym = XEXP (XEXP (op, 0), 0);
+ else
return 0;
- return CMP_INT16_P (INTVAL (op));
-}
-/* Return true if OP is a const_int requiring two instructions to load. */
-
-int
-two_insn_const_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- if (GET_CODE (op) != CONST_INT)
- return 0;
- if (INT16_P (INTVAL (op))
- || UINT24_P (INTVAL (op))
- || UPPER16_P (INTVAL (op)))
- return 0;
- return 1;
+ return (! addr24_operand (sym, mode)
+ && ! small_data_operand (sym, mode));
}
-/* Return true if OP is an acceptable argument for a single word
- move source. */
-
-int
-move_src_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- switch (GET_CODE (op))
- {
- case SYMBOL_REF :
- case CONST :
- return addr24_operand (op, mode);
- case CONST_INT :
- /* ??? We allow more cse opportunities if we only allow constants
- loadable with one insn, and split the rest into two. The instances
- where this would help should be rare and the current way is
- simpler. */
- return INT32_P (INTVAL (op));
- case LABEL_REF :
- return TARGET_ADDR24;
- case CONST_DOUBLE :
- if (mode == SFmode)
- return 1;
- else if (mode == SImode)
- {
- /* Large unsigned constants are represented as const_double's. */
- unsigned HOST_WIDE_INT low, high;
-
- low = CONST_DOUBLE_LOW (op);
- high = CONST_DOUBLE_HIGH (op);
- return high == 0 && low <= 0xffffffff;
- }
- else
- return 0;
- case REG :
- return register_operand (op, mode);
- case SUBREG :
- /* (subreg (mem ...) ...) can occur here if the inner part was once a
- pseudo-reg and is now a stack slot. */
- if (GET_CODE (SUBREG_REG (op)) == MEM)
- return address_operand (XEXP (SUBREG_REG (op), 0), mode);
- else
- return register_operand (op, mode);
- case MEM :
- if (GET_CODE (XEXP (op, 0)) == PRE_INC
- || GET_CODE (XEXP (op, 0)) == PRE_DEC)
- return 0; /* loads can't do pre-{inc,dec} */
- return address_operand (XEXP (op, 0), mode);
- default :
- return 0;
- }
-}
-
-/* Return true if OP is an acceptable argument for a double word
- move source. */
+/* Return 1 if OP is a function that can be called with the `bl' insn. */
int
-move_double_src_operand (op, mode)
- rtx op;
- enum machine_mode mode;
+call26_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
{
- switch (GET_CODE (op))
- {
- case CONST_INT :
- case CONST_DOUBLE :
- return 1;
- case REG :
- return register_operand (op, mode);
- case SUBREG :
- /* (subreg (mem ...) ...) can occur here if the inner part was once a
- pseudo-reg and is now a stack slot. */
- if (GET_CODE (SUBREG_REG (op)) == MEM)
- return move_double_src_operand (SUBREG_REG (op), mode);
- else
- return register_operand (op, mode);
- case MEM :
- /* Disallow auto inc/dec for now. */
- if (GET_CODE (XEXP (op, 0)) == PRE_DEC
- || GET_CODE (XEXP (op, 0)) == PRE_INC)
- return 0;
- return address_operand (XEXP (op, 0), mode);
- default :
- return 0;
- }
-}
+ if (flag_pic)
+ return 1;
-/* Return true if OP is an acceptable argument for a move destination. */
+ if (GET_CODE (op) == SYMBOL_REF)
+ return SYMBOL_REF_MODEL (op) != M32R_MODEL_LARGE;
-int
-move_dest_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- switch (GET_CODE (op))
- {
- case REG :
- return register_operand (op, mode);
- case SUBREG :
- /* (subreg (mem ...) ...) can occur here if the inner part was once a
- pseudo-reg and is now a stack slot. */
- if (GET_CODE (SUBREG_REG (op)) == MEM)
- return address_operand (XEXP (SUBREG_REG (op), 0), mode);
- else
- return register_operand (op, mode);
- case MEM :
- if (GET_CODE (XEXP (op, 0)) == POST_INC)
- return 0; /* stores can't do post inc */
- return address_operand (XEXP (op, 0), mode);
- default :
- return 0;
- }
+ return TARGET_CALL26;
}
/* Return 1 if OP is a DImode const we want to handle inline.
It is used by the 'G' CONST_DOUBLE_OK_FOR_LETTER. */
int
-easy_di_const (op)
- rtx op;
+easy_di_const (rtx op)
{
rtx high_rtx, low_rtx;
HOST_WIDE_INT high, low;
It is used by the 'H' CONST_DOUBLE_OK_FOR_LETTER. */
int
-easy_df_const (op)
- rtx op;
+easy_df_const (rtx op)
{
REAL_VALUE_TYPE r;
long l[2];
return 0;
}
-/* Return 1 if OP is an EQ or NE comparison operator. */
-
-int
-eqne_comparison_operator (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- enum rtx_code code = GET_CODE (op);
-
- if (GET_RTX_CLASS (code) != '<')
- return 0;
- return (code == EQ || code == NE);
-}
-
-/* Return 1 if OP is a signed comparison operator. */
-
-int
-signed_comparison_operator (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- enum rtx_code code = GET_CODE (op);
-
- if (GET_RTX_CLASS (code) != '<')
- return 0;
- return (code == EQ || code == NE
- || code == LT || code == LE || code == GT || code == GE);
-}
-
-/* Return 1 if OP is (mem (reg ...)).
- This is used in insn length calcs. */
-
-int
-memreg_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- return GET_CODE (op) == MEM && GET_CODE (XEXP (op, 0)) == REG;
-}
-
-/* Return true if OP is an acceptable input argument for a zero/sign extend
- operation. */
-
-int
-extend_operand (op, mode)
- rtx op;
- enum machine_mode mode;
-{
- rtx addr;
-
- switch (GET_CODE (op))
- {
- case REG :
- case SUBREG :
- return register_operand (op, mode);
-
- case MEM :
- addr = XEXP (op, 0);
- if (GET_CODE (addr) == PRE_INC || GET_CODE (addr) == PRE_DEC)
- return 0; /* loads can't do pre inc/pre dec */
-
- return address_operand (addr, mode);
-
- default :
- return 0;
- }
-}
-
-/* Return non-zero if the operand is an insn that is a small insn.
- Allow const_int 0 as well, which is a placeholder for NOP slots. */
+/* Return 1 if OP is (mem (reg ...)).
+ This is used in insn length calcs. */
int
-small_insn_p (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
+memreg_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
{
- if (GET_CODE (op) == CONST_INT && INTVAL (op) == 0)
- return 1;
-
- if (! INSN_P (op))
- return 0;
-
- return get_attr_length (op) == 2;
+ return GET_CODE (op) == MEM && GET_CODE (XEXP (op, 0)) == REG;
}
-/* Return non-zero if the operand is an insn that is a large insn. */
+/* Return nonzero if TYPE must be passed by indirect reference. */
-int
-large_insn_p (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
+static bool
+m32r_pass_by_reference (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED,
+ enum machine_mode mode, tree type,
+ bool named ATTRIBUTE_UNUSED)
{
- if (! INSN_P (op))
- return 0;
+ int size;
- return get_attr_length (op) != 2;
-}
+ if (type)
+ size = int_size_in_bytes (type);
+ else
+ size = GET_MODE_SIZE (mode);
+ return (size < 0 || size > 8);
+}
\f
/* Comparisons. */
-/* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
- return the mode to be used for the comparison. */
-
-int
-m32r_select_cc_mode (op, x, y)
- int op ATTRIBUTE_UNUSED;
- rtx x ATTRIBUTE_UNUSED;
- rtx y ATTRIBUTE_UNUSED;
-{
- return (int) CCmode;
-}
-
/* X and Y are two things to compare using CODE. Emit the compare insn and
return the rtx for compare [arg0 of the if_then_else].
If need_compare is true then the comparison insn must be generated, rather
- than being susummed into the following branch instruction. */
+ than being subsumed into the following branch instruction. */
rtx
-gen_compare (code, x, y, need_compare)
- enum rtx_code code;
- rtx x, y;
- int need_compare;
+gen_compare (enum rtx_code code, rtx x, rtx y, int need_compare)
{
- enum machine_mode mode = SELECT_CC_MODE (code, x, y);
- enum rtx_code compare_code, branch_code;
- rtx cc_reg = gen_rtx_REG (mode, CARRY_REGNUM);
+ enum rtx_code compare_code;
+ enum rtx_code branch_code;
+ rtx cc_reg = gen_rtx_REG (CCmode, CARRY_REGNUM);
int must_swap = 0;
switch (code)
{
case EQ:
if (GET_CODE (y) == CONST_INT
- && CMP_INT16_P (INTVAL (y)) /* reg equal to small const. */
+ && CMP_INT16_P (INTVAL (y)) /* Reg equal to small const. */
&& y != const0_rtx)
{
rtx tmp = gen_reg_rtx (SImode);
- emit_insn (gen_cmp_ne_small_const_insn (tmp, x, y));
+ emit_insn (gen_addsi3 (tmp, x, GEN_INT (-INTVAL (y))));
x = tmp;
y = const0_rtx;
}
- else if (CONSTANT_P (y)) /* reg equal to const. */
+ else if (CONSTANT_P (y)) /* Reg equal to const. */
{
rtx tmp = force_reg (GET_MODE (x), y);
y = tmp;
}
- if (register_operand (y, SImode) /* reg equal to reg. */
- || y == const0_rtx) /* req equal to zero. */
+ if (register_operand (y, SImode) /* Reg equal to reg. */
+ || y == const0_rtx) /* Reg equal to zero. */
{
emit_insn (gen_cmp_eqsi_insn (x, y));
- return gen_rtx (code, mode, cc_reg, const0_rtx);
+ return gen_rtx_fmt_ee (code, CCmode, cc_reg, const0_rtx);
}
break;
if (register_operand (y, SImode)
|| (GET_CODE (y) == CONST_INT && CMP_INT16_P (INTVAL (y))))
{
- rtx tmp = gen_reg_rtx (SImode); /* reg compared to reg. */
+ rtx tmp = gen_reg_rtx (SImode); /* Reg compared to reg. */
switch (code)
{
if (y == const0_rtx)
tmp = const1_rtx;
else
- emit_insn (gen_cmp_ne_small_const_insn (tmp, y, const1_rtx));
+ emit_insn (gen_addsi3 (tmp, y, constm1_rtx));
emit_insn (gen_cmp_ltsi_insn (x, tmp));
code = EQ;
break;
case GT:
if (GET_CODE (y) == CONST_INT)
- tmp = gen_rtx (PLUS, SImode, y, const1_rtx);
+ tmp = gen_rtx_PLUS (SImode, y, const1_rtx);
else
- emit_insn (gen_cmp_ne_small_const_insn (tmp, y, const1_rtx));
+ emit_insn (gen_addsi3 (tmp, y, constm1_rtx));
emit_insn (gen_cmp_ltsi_insn (x, tmp));
code = NE;
break;
abort ();
}
- return gen_rtx (code, mode, cc_reg, const0_rtx);
+ return gen_rtx_fmt_ee (code, CCmode, cc_reg, const0_rtx);
}
break;
if (register_operand (y, SImode)
|| (GET_CODE (y) == CONST_INT && CMP_INT16_P (INTVAL (y))))
{
- rtx tmp = gen_reg_rtx (SImode); /* reg (unsigned) compared to reg. */
+ rtx tmp = gen_reg_rtx (SImode); /* Reg (unsigned) compared to reg. */
switch (code)
{
if (y == const0_rtx)
tmp = const1_rtx;
else
- emit_insn (gen_cmp_ne_small_const_insn (tmp, y, const1_rtx));
+ emit_insn (gen_addsi3 (tmp, y, constm1_rtx));
emit_insn (gen_cmp_ltusi_insn (x, tmp));
code = EQ;
break;
case GTU:
if (GET_CODE (y) == CONST_INT)
- tmp = gen_rtx (PLUS, SImode, y, const1_rtx);
+ tmp = gen_rtx_PLUS (SImode, y, const1_rtx);
else
- emit_insn (gen_cmp_ne_small_const_insn (tmp, y, const1_rtx));
+ emit_insn (gen_addsi3 (tmp, y, constm1_rtx));
emit_insn (gen_cmp_ltusi_insn (x, tmp));
code = NE;
break;
abort();
}
- return gen_rtx (code, mode, cc_reg, const0_rtx);
+ return gen_rtx_fmt_ee (code, CCmode, cc_reg, const0_rtx);
}
break;
}
else
{
- /* reg/reg equal comparison */
+ /* Reg/reg equal comparison. */
if (compare_code == EQ
&& register_operand (y, SImode))
- return gen_rtx (code, mode, x, y);
+ return gen_rtx_fmt_ee (code, CCmode, x, y);
- /* reg/zero signed comparison */
+ /* Reg/zero signed comparison. */
if ((compare_code == EQ || compare_code == LT)
&& y == const0_rtx)
- return gen_rtx (code, mode, x, y);
+ return gen_rtx_fmt_ee (code, CCmode, x, y);
- /* reg/smallconst equal comparison */
+ /* Reg/smallconst equal comparison. */
if (compare_code == EQ
&& GET_CODE (y) == CONST_INT
&& CMP_INT16_P (INTVAL (y)))
{
rtx tmp = gen_reg_rtx (SImode);
- emit_insn (gen_cmp_ne_small_const_insn (tmp, x, y));
- return gen_rtx (code, mode, tmp, const0_rtx);
+
+ emit_insn (gen_addsi3 (tmp, x, GEN_INT (-INTVAL (y))));
+ return gen_rtx_fmt_ee (code, CCmode, tmp, const0_rtx);
}
- /* reg/const equal comparison */
+ /* Reg/const equal comparison. */
if (compare_code == EQ
&& CONSTANT_P (y))
{
rtx tmp = force_reg (GET_MODE (x), y);
- return gen_rtx (code, mode, x, tmp);
+
+ return gen_rtx_fmt_ee (code, CCmode, x, tmp);
}
}
y = force_reg (GET_MODE (x), y);
else
{
- int ok_const =
- (code == LTU || code == LEU || code == GTU || code == GEU)
- ? uint16_operand (y, GET_MODE (y))
- : reg_or_cmp_int16_operand (y, GET_MODE (y));
-
+ int ok_const = reg_or_int16_operand (y, GET_MODE (y));
+
if (! ok_const)
y = force_reg (GET_MODE (x), y);
}
abort ();
}
- return gen_rtx (branch_code, VOIDmode, cc_reg, CONST0_RTX (mode));
+ return gen_rtx_fmt_ee (branch_code, VOIDmode, cc_reg, CONST0_RTX (CCmode));
}
\f
/* Split a 2 word move (DI or DF) into component parts. */
rtx
-gen_split_move_double (operands)
- rtx operands[];
+gen_split_move_double (rtx operands[])
{
enum machine_mode mode = GET_MODE (operands[0]);
rtx dest = operands[0];
subregs to make this code simpler. It is safe to call
alter_subreg any time after reload. */
if (GET_CODE (dest) == SUBREG)
- dest = alter_subreg (dest);
+ alter_subreg (&dest);
if (GET_CODE (src) == SUBREG)
- src = alter_subreg (src);
+ alter_subreg (&src);
start_sequence ();
if (GET_CODE (dest) == REG)
{
int dregno = REGNO (dest);
- /* reg = reg */
+ /* Reg = reg. */
if (GET_CODE (src) == REG)
{
int sregno = REGNO (src);
operand_subword (src, !reverse, TRUE, mode)));
}
- /* reg = constant */
+ /* Reg = constant. */
else if (GET_CODE (src) == CONST_INT || GET_CODE (src) == CONST_DOUBLE)
{
rtx words[2];
words[1]));
}
- /* reg = mem */
+ /* Reg = mem. */
else if (GET_CODE (src) == MEM)
{
/* If the high-address word is used in the address, we must load it
last. Otherwise, load it first. */
- rtx addr = XEXP (src, 0);
- int reverse = (refers_to_regno_p (dregno, dregno+1, addr, 0) != 0);
+ int reverse
+ = (refers_to_regno_p (dregno, dregno + 1, XEXP (src, 0), 0) != 0);
/* We used to optimize loads from single registers as
ld r1,r3+; ld r2,r3
if r3 were not used subsequently. However, the REG_NOTES aren't
- propigated correctly by the reload phase, and it can cause bad
+ propagated correctly by the reload phase, and it can cause bad
code to be generated. We could still try:
ld r1,r3+; ld r2,r3; addi r3,-4
which saves 2 bytes and doesn't force longword alignment. */
emit_insn (gen_rtx_SET (VOIDmode,
operand_subword (dest, reverse, TRUE, mode),
- change_address (src, SImode,
- plus_constant (addr,
- reverse * UNITS_PER_WORD))));
+ adjust_address (src, SImode,
+ reverse * UNITS_PER_WORD)));
emit_insn (gen_rtx_SET (VOIDmode,
operand_subword (dest, !reverse, TRUE, mode),
- change_address (src, SImode,
- plus_constant (addr,
- (!reverse) * UNITS_PER_WORD))));
+ adjust_address (src, SImode,
+ !reverse * UNITS_PER_WORD)));
}
-
else
abort ();
}
- /* mem = reg */
+ /* Mem = reg. */
/* We used to optimize loads from single registers as
st r1,r3; st r2,+r3
if r3 were not used subsequently. However, the REG_NOTES aren't
- propigated correctly by the reload phase, and it can cause bad
+ propagated correctly by the reload phase, and it can cause bad
code to be generated. We could still try:
st r1,r3; st r2,+r3; addi r3,-4
which saves 2 bytes and doesn't force longword alignment. */
else if (GET_CODE (dest) == MEM && GET_CODE (src) == REG)
{
- rtx addr = XEXP (dest, 0);
-
emit_insn (gen_rtx_SET (VOIDmode,
- change_address (dest, SImode, addr),
+ adjust_address (dest, SImode, 0),
operand_subword (src, 0, TRUE, mode)));
emit_insn (gen_rtx_SET (VOIDmode,
- change_address (dest, SImode,
- plus_constant (addr, UNITS_PER_WORD)),
+ adjust_address (dest, SImode, UNITS_PER_WORD),
operand_subword (src, 1, TRUE, mode)));
}
else
abort ();
- val = gen_sequence ();
+ val = get_insns ();
end_sequence ();
return val;
}
\f
-/* Implements the FUNCTION_ARG_PARTIAL_NREGS macro. */
-
-int
-function_arg_partial_nregs (cum, mode, type, named)
- CUMULATIVE_ARGS *cum;
- enum machine_mode mode;
- tree type;
- int named ATTRIBUTE_UNUSED;
+static int
+m32r_arg_partial_bytes (CUMULATIVE_ARGS *cum, enum machine_mode mode,
+ tree type, bool named ATTRIBUTE_UNUSED)
{
- int ret;
- int size = (((mode == BLKmode && type)
- ? int_size_in_bytes (type)
- : GET_MODE_SIZE (mode)) + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
+ int words;
+ unsigned int size =
+ (((mode == BLKmode && type)
+ ? (unsigned int) int_size_in_bytes (type)
+ : GET_MODE_SIZE (mode)) + UNITS_PER_WORD - 1)
+ / UNITS_PER_WORD;
if (*cum >= M32R_MAX_PARM_REGS)
- ret = 0;
+ words = 0;
else if (*cum + size > M32R_MAX_PARM_REGS)
- ret = (*cum + size) - M32R_MAX_PARM_REGS;
+ words = (*cum + size) - M32R_MAX_PARM_REGS;
else
- ret = 0;
+ words = 0;
+
+ return words * UNITS_PER_WORD;
+}
- return ret;
+/* Worker function for TARGET_RETURN_IN_MEMORY. */
+
+static bool
+m32r_return_in_memory (tree type, tree fntype ATTRIBUTE_UNUSED)
+{
+ return m32r_pass_by_reference (NULL, TYPE_MODE (type), type, false);
}
/* Do any needed setup for a variadic function. For the M32R, we must
CUM has not been updated for the last named argument which has type TYPE
and mode MODE, and we rely on this fact. */
-void
-m32r_setup_incoming_varargs (cum, mode, type, pretend_size, no_rtl)
- CUMULATIVE_ARGS *cum;
- enum machine_mode mode;
- tree type;
- int *pretend_size;
- int no_rtl;
+static void
+m32r_setup_incoming_varargs (CUMULATIVE_ARGS *cum, enum machine_mode mode,
+ tree type, int *pretend_size, int no_rtl)
{
int first_anon_arg;
if (mode == BLKmode)
abort ();
- /* We must treat `__builtin_va_alist' as an anonymous arg. */
- if (current_function_varargs)
- first_anon_arg = *cum;
- else
- first_anon_arg = (ROUND_ADVANCE_CUM (*cum, mode, type)
- + ROUND_ADVANCE_ARG (mode, type));
+ first_anon_arg = (ROUND_ADVANCE_CUM (*cum, mode, type)
+ + ROUND_ADVANCE_ARG (mode, type));
if (first_anon_arg < M32R_MAX_PARM_REGS)
{
regblock = gen_rtx_MEM (BLKmode,
plus_constant (arg_pointer_rtx,
FIRST_PARM_OFFSET (0)));
- MEM_ALIAS_SET (regblock) = get_varargs_alias_set ();
- move_block_from_reg (first_reg_offset, regblock,
- size, size * UNITS_PER_WORD);
+ set_mem_alias_set (regblock, get_varargs_alias_set ());
+ move_block_from_reg (first_reg_offset, regblock, size);
*pretend_size = (size * UNITS_PER_WORD);
}
}
\f
-/* Implement `va_arg'. */
-
-rtx
-m32r_va_arg (valist, type)
- tree valist, type;
-{
- HOST_WIDE_INT size, rsize;
- tree t;
- rtx addr_rtx;
-
- size = int_size_in_bytes (type);
- rsize = (size + UNITS_PER_WORD - 1) & -UNITS_PER_WORD;
-
- if (size > 8)
- {
- tree type_ptr, type_ptr_ptr;
-
- /* Pass by reference. */
-
- type_ptr = build_pointer_type (type);
- type_ptr_ptr = build_pointer_type (type_ptr);
-
- t = build (POSTINCREMENT_EXPR, va_list_type_node, valist,
- build_int_2 (UNITS_PER_WORD, 0));
- TREE_SIDE_EFFECTS (t) = 1;
- t = build1 (NOP_EXPR, type_ptr_ptr, t);
- TREE_SIDE_EFFECTS (t) = 1;
- t = build1 (INDIRECT_REF, type_ptr, t);
-
- addr_rtx = expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
- }
- else
- {
- /* Pass by value. */
-
- if (size < UNITS_PER_WORD)
- {
- /* Care for bigendian correction on the aligned address. */
- t = build (PLUS_EXPR, ptr_type_node, valist,
- build_int_2 (rsize - size, 0));
- addr_rtx = expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
- addr_rtx = copy_to_reg (addr_rtx);
-
- /* Increment AP. */
- t = build (PLUS_EXPR, va_list_type_node, valist,
- build_int_2 (rsize, 0));
- t = build (MODIFY_EXPR, va_list_type_node, valist, t);
- TREE_SIDE_EFFECTS (t) = 1;
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
- }
- else
- {
- t = build (POSTINCREMENT_EXPR, va_list_type_node, valist,
- build_int_2 (rsize, 0));
- TREE_SIDE_EFFECTS (t) = 1;
- addr_rtx = expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
- }
- }
-
- return addr_rtx;
-}
-\f
-int
-m32r_adjust_cost (insn, link, dep_insn, cost)
- rtx insn ATTRIBUTE_UNUSED;
- rtx link ATTRIBUTE_UNUSED;
- rtx dep_insn ATTRIBUTE_UNUSED;
- int cost;
-{
- return cost;
-}
-
-\f
/* Return true if INSN is real instruction bearing insn. */
static int
-m32r_is_insn (insn)
- rtx insn;
+m32r_is_insn (rtx insn)
{
return (INSN_P (insn)
&& GET_CODE (PATTERN (insn)) != USE
/* Increase the priority of long instructions so that the
short instructions are scheduled ahead of the long ones. */
-int
-m32r_adjust_priority (insn, priority)
- rtx insn;
- int priority;
+static int
+m32r_adjust_priority (rtx insn, int priority)
{
if (m32r_is_insn (insn)
&& get_attr_insn_size (insn) != INSN_SIZE_SHORT)
}
\f
-/* Initialize for scheduling a group of instructions. */
+/* Indicate how many instructions can be issued at the same time.
+ This is sort of a lie. The m32r can issue only 1 long insn at
+ once, but it can issue 2 short insns. The default therefore is
+ set at 2, but this can be overridden by the command line option
+ -missue-rate=1. */
-void
-m32r_sched_init (stream, verbose)
- FILE * stream ATTRIBUTE_UNUSED;
- int verbose ATTRIBUTE_UNUSED;
+static int
+m32r_issue_rate (void)
{
- m32r_sched_odd_word_p = FALSE;
+ return ((TARGET_LOW_ISSUE_RATE) ? 1 : 2);
}
-
\f
-/* Reorder the schedulers priority list if needed */
+/* Cost functions. */
-void
-m32r_sched_reorder (stream, verbose, ready, n_ready)
- FILE * stream;
- int verbose;
- rtx * ready;
- int n_ready;
+static bool
+m32r_rtx_costs (rtx x, int code, int outer_code ATTRIBUTE_UNUSED, int *total)
{
- if (TARGET_DEBUG)
- return;
-
- if (verbose <= 7)
- stream = (FILE *)0;
-
- if (stream)
- fprintf (stream,
- ";;\t\t::: Looking at %d insn(s) on ready list, boundary is %s word\n",
- n_ready,
- (m32r_sched_odd_word_p) ? "odd" : "even");
-
- if (n_ready > 1)
+ switch (code)
{
- rtx * long_head = (rtx *) alloca (sizeof (rtx) * n_ready);
- rtx * long_tail = long_head;
- rtx * short_head = (rtx *) alloca (sizeof (rtx) * n_ready);
- rtx * short_tail = short_head;
- rtx * new_head = (rtx *) alloca (sizeof (rtx) * n_ready);
- rtx * new_tail = new_head + (n_ready - 1);
- int i;
-
- /* Loop through the instructions, classifing them as short/long. Try
- to keep 2 short together and/or 1 long. Note, the ready list is
- actually ordered backwards, so keep it in that manner. */
- for (i = n_ready-1; i >= 0; i--)
+ /* Small integers are as cheap as registers. 4 byte values can be
+ fetched as immediate constants - let's give that the cost of an
+ extra insn. */
+ case CONST_INT:
+ if (INT16_P (INTVAL (x)))
{
- rtx insn = ready[i];
- enum rtx_code code;
-
- if (! m32r_is_insn (insn))
- {
- /* Dump all current short/long insns just in case. */
- while (long_head != long_tail)
- *new_tail-- = *long_head++;
-
- while (short_head != short_tail)
- *new_tail-- = *short_head++;
-
- *new_tail-- = insn;
- if (stream)
- fprintf (stream,
- ";;\t\t::: Skipping non instruction %d\n",
- INSN_UID (insn));
-
- }
-
- else
- {
- if (get_attr_insn_size (insn) != INSN_SIZE_SHORT)
- *long_tail++ = insn;
-
- else
- *short_tail++ = insn;
- }
+ *total = 0;
+ return true;
}
+ /* FALLTHRU */
- /* If we are on an odd word, emit a single short instruction if
- we can */
- if (m32r_sched_odd_word_p && short_head != short_tail)
- *new_tail-- = *short_head++;
-
- /* Now dump out all of the long instructions */
- while (long_head != long_tail)
- *new_tail-- = *long_head++;
-
- /* Now dump out all of the short instructions */
- while (short_head != short_tail)
- *new_tail-- = *short_head++;
-
- if (new_tail+1 != new_head)
- abort ();
-
- memcpy (ready, new_head, sizeof (rtx) * n_ready);
- if (stream)
- {
-#ifdef HAIFA
- fprintf (stream, ";;\t\t::: New ready list: ");
- debug_ready_list (ready, n_ready);
-#else
- int i;
- for (i = 0; i < n_ready; i++)
- {
- rtx insn = ready[i];
- enum rtx_code code;
-
- fprintf (stream, " %d", INSN_UID (ready[i]));
-
- if (! m32r_is_insn (insn))
- fputs ("(?)", stream);
-
- else if (get_attr_insn_size (insn) != INSN_SIZE_SHORT)
- fputs ("(l)", stream);
+ case CONST:
+ case LABEL_REF:
+ case SYMBOL_REF:
+ *total = COSTS_N_INSNS (1);
+ return true;
- else
- fputs ("(s)", stream);
- }
+ case CONST_DOUBLE:
+ {
+ rtx high, low;
- fprintf (stream, "\n");
-#endif
- }
- }
-}
+ split_double (x, &high, &low);
+ *total = COSTS_N_INSNS (!INT16_P (INTVAL (high))
+ + !INT16_P (INTVAL (low)));
+ return true;
+ }
-\f
-/* If we have a machine that can issue a variable # of instructions
- per cycle, indicate how many more instructions can be issued
- after the current one. */
-int
-m32r_sched_variable_issue (stream, verbose, insn, how_many)
- FILE * stream;
- int verbose;
- rtx insn;
- int how_many;
-{
- int orig_odd_word_p = m32r_sched_odd_word_p;
- int short_p = FALSE;
+ case MULT:
+ *total = COSTS_N_INSNS (3);
+ return true;
- how_many--;
- if (how_many > 0 && !TARGET_DEBUG)
- {
- if (! m32r_is_insn (insn))
- how_many++;
+ case DIV:
+ case UDIV:
+ case MOD:
+ case UMOD:
+ *total = COSTS_N_INSNS (10);
+ return true;
- else if (get_attr_insn_size (insn) != INSN_SIZE_SHORT)
- {
- how_many = 0;
- m32r_sched_odd_word_p = 0;
- }
- else
- {
- m32r_sched_odd_word_p = !m32r_sched_odd_word_p;
- short_p = TRUE;
- }
+ default:
+ return false;
}
-
- if (verbose > 7 && stream)
- fprintf (stream,
- ";;\t\t::: %s insn %d starts on an %s word, can emit %d more instruction(s)\n",
- short_p ? "short" : "long",
- INSN_UID (insn),
- orig_odd_word_p ? "odd" : "even",
- how_many);
-
- return how_many;
-}
-\f
-/* Cost functions. */
-
-/* Provide the costs of an addressing mode that contains ADDR.
- If ADDR is not a valid address, its cost is irrelevant.
-
- This function is trivial at the moment. This code doesn't live
- in m32r.h so it's easy to experiment. */
-
-int
-m32r_address_cost (addr)
- rtx addr ATTRIBUTE_UNUSED;
-{
- return 1;
}
\f
/* Type of function DECL.
call with DECL = NULL_TREE. */
enum m32r_function_type
-m32r_compute_function_type (decl)
- tree decl;
+m32r_compute_function_type (tree decl)
{
/* Cached value. */
static enum m32r_function_type fn_type = M32R_FUNCTION_UNKNOWN;
return fn_type;
/* Compute function type. */
- fn_type = (lookup_attribute ("interrupt", DECL_MACHINE_ATTRIBUTES (current_function_decl)) != NULL_TREE
+ fn_type = (lookup_attribute ("interrupt", DECL_ATTRIBUTES (current_function_decl)) != NULL_TREE
? M32R_FUNCTION_INTERRUPT
: M32R_FUNCTION_NORMAL);
containing anonymous args separately but that complicates things too
much (so it's not done).
3) The return address is saved after the register save area so as to have as
- many insns as possible between the restoration of `lr' and the `jmp lr'.
-*/
+ many insns as possible between the restoration of `lr' and the `jmp lr'. */
/* Structure to be filled in by m32r_compute_frame_size with register
save masks, and offsets for the current function. */
struct m32r_frame_info
{
- unsigned int total_size; /* # bytes that the entire frame takes up */
- unsigned int extra_size; /* # bytes of extra stuff */
- unsigned int pretend_size; /* # bytes we push and pretend caller did */
- unsigned int args_size; /* # bytes that outgoing arguments take up */
- unsigned int reg_size; /* # bytes needed to store regs */
- unsigned int var_size; /* # bytes that variables take up */
- unsigned int gmask; /* mask of saved gp registers */
- unsigned int save_fp; /* nonzero if fp must be saved */
- unsigned int save_lr; /* nonzero if lr (return addr) must be saved */
- int initialized; /* nonzero if frame size already calculated */
+ unsigned int total_size; /* # bytes that the entire frame takes up. */
+ unsigned int extra_size; /* # bytes of extra stuff. */
+ unsigned int pretend_size; /* # bytes we push and pretend caller did. */
+ unsigned int args_size; /* # bytes that outgoing arguments take up. */
+ unsigned int reg_size; /* # bytes needed to store regs. */
+ unsigned int var_size; /* # bytes that variables take up. */
+ unsigned int gmask; /* Mask of saved gp registers. */
+ unsigned int save_fp; /* Nonzero if fp must be saved. */
+ unsigned int save_lr; /* Nonzero if lr (return addr) must be saved. */
+ int initialized; /* Nonzero if frame size already calculated. */
};
/* Current frame information calculated by m32r_compute_frame_size. */
static struct m32r_frame_info zero_frame_info;
#define FRAME_POINTER_MASK (1 << (FRAME_POINTER_REGNUM))
-#define RETURN_ADDR_MASK (1 << (RETURN_ADDR_REGNUM))
+#define RETURN_ADDR_MASK (1 << (RETURN_ADDR_REGNUM))
/* Tell prologue and epilogue if register REGNO should be saved / restored.
The return address and frame pointer are treated separately.
Don't consider them here. */
#define MUST_SAVE_REGISTER(regno, interrupt_p) \
-((regno) != RETURN_ADDR_REGNUM && (regno) != FRAME_POINTER_REGNUM \
- && (regs_ever_live[regno] && (!call_used_regs[regno] || interrupt_p)))
+ ((regno) != RETURN_ADDR_REGNUM && (regno) != FRAME_POINTER_REGNUM \
+ && (regs_ever_live[regno] && (!call_really_used_regs[regno] || interrupt_p)))
#define MUST_SAVE_FRAME_POINTER (regs_ever_live[FRAME_POINTER_REGNUM])
-#define MUST_SAVE_RETURN_ADDR (regs_ever_live[RETURN_ADDR_REGNUM] || profile_flag)
+#define MUST_SAVE_RETURN_ADDR (regs_ever_live[RETURN_ADDR_REGNUM] || current_function_profile)
-#define SHORT_INSN_SIZE 2 /* size of small instructions */
-#define LONG_INSN_SIZE 4 /* size of long instructions */
+#define SHORT_INSN_SIZE 2 /* Size of small instructions. */
+#define LONG_INSN_SIZE 4 /* Size of long instructions. */
/* Return the bytes needed to compute the frame pointer from the current
stack pointer.
SIZE is the size needed for local variables. */
unsigned int
-m32r_compute_frame_size (size)
- int size; /* # of var. bytes allocated. */
+m32r_compute_frame_size (int size) /* # of var. bytes allocated. */
{
int regno;
unsigned int total_size, var_size, args_size, pretend_size, extra_size;
unsigned int gmask;
enum m32r_function_type fn_type;
int interrupt_p;
+ int pic_reg_used = flag_pic && (current_function_uses_pic_offset_table);
var_size = M32R_STACK_ALIGN (size);
args_size = M32R_STACK_ALIGN (current_function_outgoing_args_size);
interrupt_p = M32R_INTERRUPT_P (fn_type);
/* Calculate space needed for registers. */
-
for (regno = 0; regno < M32R_MAX_INT_REGS; regno++)
{
- if (MUST_SAVE_REGISTER (regno, interrupt_p))
+ if (MUST_SAVE_REGISTER (regno, interrupt_p)
+ || (regno == PIC_OFFSET_TABLE_REGNUM && pic_reg_used))
{
reg_size += UNITS_PER_WORD;
gmask |= 1 << regno;
}
current_frame_info.save_fp = MUST_SAVE_FRAME_POINTER;
- current_frame_info.save_lr = MUST_SAVE_RETURN_ADDR;
+ current_frame_info.save_lr = MUST_SAVE_RETURN_ADDR || pic_reg_used;
reg_size += ((current_frame_info.save_fp + current_frame_info.save_lr)
* UNITS_PER_WORD);
return total_size;
}
\f
-/* When the `length' insn attribute is used, this macro specifies the
- value to be assigned to the address of the first insn in a
- function. If not specified, 0 is used. */
-
-int
-m32r_first_insn_address ()
+/* The table we use to reference PIC data. */
+static rtx global_offset_table;
+
+static void
+m32r_reload_lr (rtx sp, int size)
{
- if (! current_frame_info.initialized)
- m32r_compute_frame_size (get_frame_size ());
+ rtx lr = gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM);
- return 0;
+ if (size == 0)
+ emit_insn (gen_movsi (lr, gen_rtx_MEM (Pmode, sp)));
+ else if (size <= 32768)
+ emit_insn (gen_movsi (lr, gen_rtx_MEM (Pmode,
+ gen_rtx_PLUS (Pmode, sp,
+ GEN_INT (size)))));
+ else
+ {
+ rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
+
+ emit_insn (gen_movsi (tmp, GEN_INT (size)));
+ emit_insn (gen_addsi3 (tmp, tmp, sp));
+ emit_insn (gen_movsi (lr, gen_rtx_MEM (Pmode, tmp)));
+ }
+
+ emit_insn (gen_rtx_USE (VOIDmode, lr));
}
-\f
+
+void
+m32r_load_pic_register (void)
+{
+ global_offset_table = gen_rtx_SYMBOL_REF (Pmode, "_GLOBAL_OFFSET_TABLE_");
+ emit_insn (gen_get_pc (pic_offset_table_rtx, global_offset_table,
+ GEN_INT (TARGET_MODEL_SMALL)));
+
+ /* Need to emit this whether or not we obey regdecls,
+ since setjmp/longjmp can cause life info to screw up. */
+ emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx));
+}
+
/* Expand the m32r prologue as a series of insns. */
void
-m32r_expand_prologue ()
+m32r_expand_prologue (void)
{
int regno;
int frame_size;
unsigned int gmask;
+ int pic_reg_used = flag_pic && (current_function_uses_pic_offset_table);
if (! current_frame_info.initialized)
m32r_compute_frame_size (get_frame_size ());
}
/* Save any registers we need to and set up fp. */
-
if (current_frame_info.save_fp)
emit_insn (gen_movsi_push (stack_pointer_rtx, frame_pointer_rtx));
+ current_frame_info.reg_size));
if (frame_size == 0)
- ; /* nothing to do */
+ ; /* Nothing to do. */
else if (frame_size <= 32768)
emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx,
GEN_INT (-frame_size)));
else
{
rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
+
emit_insn (gen_movsi (tmp, GEN_INT (frame_size)));
emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
}
if (frame_pointer_needed)
emit_insn (gen_movsi (frame_pointer_rtx, stack_pointer_rtx));
- if (profile_flag || profile_block_flag)
+ if (current_function_profile)
+ /* Push lr for mcount (form_pc, x). */
+ emit_insn (gen_movsi_push (stack_pointer_rtx,
+ gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM)));
+
+ if (pic_reg_used)
+ {
+ m32r_load_pic_register ();
+ m32r_reload_lr (stack_pointer_rtx,
+ (current_function_profile ? 0 : frame_size));
+ }
+
+ if (current_function_profile && !pic_reg_used)
emit_insn (gen_blockage ());
}
Note, if this is changed, you need to mirror the changes in
m32r_compute_frame_size which calculates the prolog size. */
-void
-m32r_output_function_prologue (file, size)
- FILE * file;
- int size;
+static void
+m32r_output_function_prologue (FILE * file, HOST_WIDE_INT size)
{
enum m32r_function_type fn_type = m32r_compute_function_type (current_function_decl);
/* If this is an interrupt handler, mark it as such. */
if (M32R_INTERRUPT_P (fn_type))
- {
- fprintf (file, "\t%s interrupt handler\n",
- ASM_COMMENT_START);
- }
+ fprintf (file, "\t%s interrupt handler\n", ASM_COMMENT_START);
if (! current_frame_info.initialized)
m32r_compute_frame_size (size);
}
\f
/* Do any necessary cleanup after a function to restore stack, frame,
- and regs. */
+ and regs. */
-void
-m32r_output_function_epilogue (file, size)
- FILE * file;
- int size ATTRIBUTE_UNUSED;
+static void
+m32r_output_function_epilogue (FILE * file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
{
int regno;
int noepilogue = FALSE;
{
unsigned int reg_offset = var_size + args_size;
if (reg_offset == 0)
- ; /* nothing to do */
+ ; /* Nothing to do. */
else if (reg_offset < 128)
fprintf (file, "\taddi %s,%s%d\n",
sp_str, IMMEDIATE_PREFIX, reg_offset);
else if (frame_pointer_needed)
{
unsigned int reg_offset = var_size + args_size;
+
if (reg_offset == 0)
fprintf (file, "\tmv %s,%s\n", sp_str, fp_str);
else if (reg_offset < 32768)
fprintf (file, "\tjmp %s\n", reg_names[RETURN_ADDR_REGNUM]);
}
-#if 0 /* no longer needed */
- /* Ensure the function cleanly ends on a 32 bit boundary. */
- fprintf (file, "\t.fillinsn\n");
-#endif
-
/* Reset state info for each function. */
current_frame_info = zero_frame_info;
m32r_compute_function_type (NULL_TREE);
}
\f
-/* Return non-zero if this function is known to have a null or 1 instruction
+/* Return nonzero if this function is known to have a null or 1 instruction
epilogue. */
int
-direct_return ()
+direct_return (void)
{
if (!reload_completed)
return FALSE;
if (! current_frame_info.initialized)
m32r_compute_frame_size (get_frame_size ());
- return current_frame_info.total_size == 0;
+ return current_frame_info.total_size == 0;
}
\f
-/* PIC */
+/* PIC. */
+
+int
+m32r_legitimate_pic_operand_p (rtx x)
+{
+ if (GET_CODE (x) == SYMBOL_REF || GET_CODE (x) == LABEL_REF)
+ return 0;
+
+ if (GET_CODE (x) == CONST
+ && GET_CODE (XEXP (x, 0)) == PLUS
+ && (GET_CODE (XEXP (XEXP (x, 0), 0)) == SYMBOL_REF
+ || GET_CODE (XEXP (XEXP (x, 0), 0)) == LABEL_REF)
+ && (GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT))
+ return 0;
+
+ return 1;
+}
+
+rtx
+m32r_legitimize_pic_address (rtx orig, rtx reg)
+{
+#ifdef DEBUG_PIC
+ printf("m32r_legitimize_pic_address()\n");
+#endif
+
+ if (GET_CODE (orig) == SYMBOL_REF || GET_CODE (orig) == LABEL_REF)
+ {
+ rtx pic_ref, address;
+ rtx insn;
+ int subregs = 0;
+
+ if (reg == 0)
+ {
+ if (reload_in_progress || reload_completed)
+ abort ();
+ else
+ reg = gen_reg_rtx (Pmode);
+
+ subregs = 1;
+ }
+
+ if (subregs)
+ address = gen_reg_rtx (Pmode);
+ else
+ address = reg;
+
+ current_function_uses_pic_offset_table = 1;
+
+ if (GET_CODE (orig) == LABEL_REF
+ || (GET_CODE (orig) == SYMBOL_REF && SYMBOL_REF_LOCAL_P (orig)))
+ {
+ emit_insn (gen_gotoff_load_addr (reg, orig));
+ emit_insn (gen_addsi3 (reg, reg, pic_offset_table_rtx));
+ return reg;
+ }
+
+ emit_insn (gen_pic_load_addr (address, orig));
+
+ emit_insn (gen_addsi3 (address, address, pic_offset_table_rtx));
+ pic_ref = gen_const_mem (Pmode, address);
+ insn = emit_move_insn (reg, pic_ref);
+#if 0
+ /* Put a REG_EQUAL note on this insn, so that it can be optimized
+ by loop. */
+ REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, orig,
+ REG_NOTES (insn));
+#endif
+ return reg;
+ }
+ else if (GET_CODE (orig) == CONST)
+ {
+ rtx base, offset;
+
+ if (GET_CODE (XEXP (orig, 0)) == PLUS
+ && XEXP (XEXP (orig, 0), 1) == pic_offset_table_rtx)
+ return orig;
+
+ if (reg == 0)
+ {
+ if (reload_in_progress || reload_completed)
+ abort ();
+ else
+ reg = gen_reg_rtx (Pmode);
+ }
+
+ if (GET_CODE (XEXP (orig, 0)) == PLUS)
+ {
+ base = m32r_legitimize_pic_address (XEXP (XEXP (orig, 0), 0), reg);
+ if (base == reg)
+ offset = m32r_legitimize_pic_address (XEXP (XEXP (orig, 0), 1), NULL_RTX);
+ else
+ offset = m32r_legitimize_pic_address (XEXP (XEXP (orig, 0), 1), reg);
+ }
+ else
+ return orig;
+
+ if (GET_CODE (offset) == CONST_INT)
+ {
+ if (INT16_P (INTVAL (offset)))
+ return plus_constant (base, INTVAL (offset));
+ else if (! reload_in_progress && ! reload_completed)
+ offset = force_reg (Pmode, offset);
+ else
+ /* If we reach here, then something is seriously wrong. */
+ abort ();
+ }
+
+ return gen_rtx_PLUS (Pmode, base, offset);
+ }
+
+ return orig;
+}
/* Emit special PIC prologues and epilogues. */
void
-m32r_finalize_pic ()
+m32r_finalize_pic (void)
{
- /* nothing to do */
+ current_function_uses_pic_offset_table |= current_function_profile;
}
\f
/* Nested function support. */
CXT is an RTX for the static chain value for the function. */
void
-m32r_initialize_trampoline (tramp, fnaddr, cxt)
- rtx tramp ATTRIBUTE_UNUSED;
- rtx fnaddr ATTRIBUTE_UNUSED;
- rtx cxt ATTRIBUTE_UNUSED;
+m32r_initialize_trampoline (rtx tramp ATTRIBUTE_UNUSED,
+ rtx fnaddr ATTRIBUTE_UNUSED,
+ rtx cxt ATTRIBUTE_UNUSED)
{
}
\f
-/* Set the cpu type and print out other fancy things,
- at the top of the file. */
-
-void
-m32r_asm_file_start (file)
- FILE * file;
+static void
+m32r_file_start (void)
{
+ default_file_start ();
+
if (flag_verbose_asm)
- fprintf (file, "%s M32R/D special options: -G %d\n",
+ fprintf (asm_out_file,
+ "%s M32R/D special options: -G " HOST_WIDE_INT_PRINT_UNSIGNED "\n",
ASM_COMMENT_START, g_switch_value);
+
+ if (TARGET_LITTLE_ENDIAN)
+ fprintf (asm_out_file, "\t.little\n");
}
\f
/* Print operand X (an rtx) in assembler syntax to file FILE.
For `%' followed by punctuation, CODE is the punctuation and X is null. */
void
-m32r_print_operand (file, x, code)
- FILE * file;
- rtx x;
- int code;
+m32r_print_operand (FILE * file, rtx x, int code)
{
rtx addr;
if (GET_CODE (x) == REG)
fprintf (file, "@+%s", reg_names [REGNO (x)]);
else
- output_operand_lossage ("invalid operand to %s code");
+ output_operand_lossage ("invalid operand to %%s code");
return;
case 'p':
if (GET_CODE (x) == REG)
fprintf (file, "@%s+", reg_names [REGNO (x)]);
else
- output_operand_lossage ("invalid operand to %p code");
+ output_operand_lossage ("invalid operand to %%p code");
return;
case 'R' :
fputc (')', file);
}
else
- output_operand_lossage ("invalid operand to %R code");
+ output_operand_lossage ("invalid operand to %%R code");
return;
- case 'H' : /* High word */
- case 'L' : /* Low word */
+ case 'H' : /* High word. */
+ case 'L' : /* Low word. */
if (GET_CODE (x) == REG)
{
- /* L = least significant word, H = most significant word */
+ /* L = least significant word, H = most significant word. */
if ((WORDS_BIG_ENDIAN != 0) ^ (code == 'L'))
fputs (reg_names[REGNO (x)], file);
else
code == 'L' ? INTVAL (first) : INTVAL (second));
}
else
- output_operand_lossage ("invalid operand to %H/%L code");
+ output_operand_lossage ("invalid operand to %%H/%%L code");
return;
case 'A' :
{
- REAL_VALUE_TYPE d;
char str[30];
if (GET_CODE (x) != CONST_DOUBLE
|| GET_MODE_CLASS (GET_MODE (x)) != MODE_FLOAT)
- fatal_insn ("Bad insn for 'A'", x);
- REAL_VALUE_FROM_CONST_DOUBLE (d, x);
- REAL_VALUE_TO_DECIMAL (d, "%.20e", str);
+ fatal_insn ("bad insn for 'A'", x);
+
+ real_to_decimal (str, CONST_DOUBLE_REAL_VALUE (x), sizeof (str), 0, 1);
fprintf (file, "%s", str);
return;
}
- case 'B' : /* Bottom half */
- case 'T' : /* Top half */
+ case 'B' : /* Bottom half. */
+ case 'T' : /* Top half. */
/* Output the argument to a `seth' insn (sets the Top half-word).
For constants output arguments to a seth/or3 pair to set Top and
Bottom halves. For symbols output arguments to a seth/add3 pair to
split_double (x, &first, &second);
x = WORDS_BIG_ENDIAN ? second : first;
- fprintf (file,
-#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
- "0x%x",
-#else
- "0x%lx",
-#endif
+ fprintf (file, HOST_WIDE_INT_PRINT_HEX,
(code == 'B'
? INTVAL (x) & 0xffff
: (INTVAL (x) >> 16) & 0xffff));
fputc (')', file);
return;
default :
- output_operand_lossage ("invalid operand to %T/%B code");
+ output_operand_lossage ("invalid operand to %%T/%%B code");
return;
}
break;
fputs (".a", file);
}
else
- output_operand_lossage ("invalid operand to %U code");
+ output_operand_lossage ("invalid operand to %%U code");
return;
case 'N' :
if (GET_CODE (x) == CONST_INT)
output_addr_const (file, GEN_INT (- INTVAL (x)));
else
- output_operand_lossage ("invalid operand to %N code");
+ output_operand_lossage ("invalid operand to %%N code");
return;
case 'X' :
/* Print a const_int in hex. Used in comments. */
if (GET_CODE (x) == CONST_INT)
- fprintf (file,
-#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
- "0x%x",
-#else
- "0x%lx",
-#endif
- INTVAL (x));
+ fprintf (file, HOST_WIDE_INT_PRINT_HEX, INTVAL (x));
return;
case '#' :
fputs (IMMEDIATE_PREFIX, file);
return;
-#if 0 /* ??? no longer used */
- case '@' :
- fputs (reg_names[SDA_REGNUM], file);
- return;
-#endif
-
case 0 :
/* Do nothing special. */
break;
if (GET_CODE (addr) == PRE_INC)
{
if (GET_CODE (XEXP (addr, 0)) != REG)
- fatal_insn ("Pre-increment address is not a register", x);
+ fatal_insn ("pre-increment address is not a register", x);
fprintf (file, "@+%s", reg_names[REGNO (XEXP (addr, 0))]);
}
else if (GET_CODE (addr) == PRE_DEC)
{
if (GET_CODE (XEXP (addr, 0)) != REG)
- fatal_insn ("Pre-decrement address is not a register", x);
+ fatal_insn ("pre-decrement address is not a register", x);
fprintf (file, "@-%s", reg_names[REGNO (XEXP (addr, 0))]);
}
else if (GET_CODE (addr) == POST_INC)
{
if (GET_CODE (XEXP (addr, 0)) != REG)
- fatal_insn ("Post-increment address is not a register", x);
+ fatal_insn ("post-increment address is not a register", x);
fprintf (file, "@%s+", reg_names[REGNO (XEXP (addr, 0))]);
}
/* Print a memory address as an operand to reference that memory location. */
void
-m32r_print_operand_address (file, addr)
- FILE * file;
- rtx addr;
+m32r_print_operand_address (FILE * file, rtx addr)
{
- register rtx base;
- register rtx index = 0;
- int offset = 0;
+ rtx base;
+ rtx index = 0;
+ int offset = 0;
switch (GET_CODE (addr))
{
fputs (reg_names[REGNO (base)], file);
}
else
- fatal_insn ("Bad address", addr);
+ fatal_insn ("bad address", addr);
}
else if (GET_CODE (base) == LO_SUM)
{
fputs (reg_names[REGNO (XEXP (base, 0))], file);
}
else
- fatal_insn ("Bad address", addr);
+ fatal_insn ("bad address", addr);
break;
case LO_SUM :
if (GET_CODE (XEXP (addr, 0)) != REG)
- fatal_insn ("Lo_sum not of register", addr);
+ fatal_insn ("lo_sum not of register", addr);
if (small_data_operand (XEXP (addr, 1), VOIDmode))
fputs ("sda(", file);
else
fputs (reg_names[REGNO (XEXP (addr, 0))], file);
break;
- case PRE_INC : /* Assume SImode */
+ case PRE_INC : /* Assume SImode. */
fprintf (file, "+%s", reg_names[REGNO (XEXP (addr, 0))]);
break;
- case PRE_DEC : /* Assume SImode */
+ case PRE_DEC : /* Assume SImode. */
fprintf (file, "-%s", reg_names[REGNO (XEXP (addr, 0))]);
break;
- case POST_INC : /* Assume SImode */
+ case POST_INC : /* Assume SImode. */
fprintf (file, "%s+", reg_names[REGNO (XEXP (addr, 0))]);
break;
}
/* Return true if the operands are the constants 0 and 1. */
+
int
-zero_and_one (operand1, operand2)
- rtx operand1;
- rtx operand2;
+zero_and_one (rtx operand1, rtx operand2)
{
return
GET_CODE (operand1) == CONST_INT
||((INTVAL (operand1) == 1) && (INTVAL (operand2) == 0)));
}
-/* Return non-zero if the operand is suitable for use in a conditional move sequence. */
-int
-conditional_move_operand (operand, mode)
- rtx operand;
- enum machine_mode mode;
-{
- /* Only defined for simple integers so far... */
- if (mode != SImode && mode != HImode && mode != QImode)
- return FALSE;
-
- /* At the moment we can hanndle moving registers and loading constants. */
- /* To be added: Addition/subtraction/bitops/multiplication of registers. */
-
- switch (GET_CODE (operand))
- {
- case REG:
- return 1;
-
- case CONST_INT:
- return INT8_P (INTVAL (operand));
-
- default:
-#if 0
- fprintf (stderr, "Test for cond move op of type: %s\n",
- GET_RTX_NAME (GET_CODE (operand)));
-#endif
- return 0;
- }
-}
-
-/* Return true if the code is a test of the carry bit */
-int
-carry_compare_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
-{
- rtx x;
-
- if (GET_MODE (op) != CCmode && GET_MODE (op) != VOIDmode)
- return FALSE;
-
- if (GET_CODE (op) != NE && GET_CODE (op) != EQ)
- return FALSE;
-
- x = XEXP (op, 0);
- if (GET_CODE (x) != REG || REGNO (x) != CARRY_REGNUM)
- return FALSE;
-
- x = XEXP (op, 1);
- if (GET_CODE (x) != CONST_INT || INTVAL (x) != 0)
- return FALSE;
-
- return TRUE;
-}
-
/* Generate the correct assembler code to handle the conditional loading of a
value into a register. It is known that the operands satisfy the
conditional_move_operand() function above. The destination is operand[0].
The condition is operand [1]. The 'true' value is operand [2] and the
'false' value is operand [3]. */
+
char *
-emit_cond_move (operands, insn)
- rtx * operands;
- rtx insn ATTRIBUTE_UNUSED;
+emit_cond_move (rtx * operands, rtx insn ATTRIBUTE_UNUSED)
{
static char buffer [100];
const char * dest = reg_names [REGNO (operands [0])];
}
sprintf (buffer, "mvfc %s, cbr", dest);
-
+
/* If the true value was '0' then we need to invert the results of the move. */
if (INTVAL (operands [2]) == 0)
sprintf (buffer + strlen (buffer), "\n\txor3 %s, %s, #1",
dest, dest);
-
+
return buffer;
}
/* Returns true if the registers contained in the two
- rtl expressions are different. */
+ rtl expressions are different. */
+
int
-m32r_not_same_reg (a, b)
- rtx a;
- rtx b;
+m32r_not_same_reg (rtx a, rtx b)
{
int reg_a = -1;
int reg_b = -2;
}
\f
+rtx
+m32r_function_symbol (const char *name)
+{
+ int extra_flags = 0;
+ enum m32r_model model;
+ rtx sym = gen_rtx_SYMBOL_REF (Pmode, name);
+
+ if (TARGET_MODEL_SMALL)
+ model = M32R_MODEL_SMALL;
+ else if (TARGET_MODEL_MEDIUM)
+ model = M32R_MODEL_MEDIUM;
+ else if (TARGET_MODEL_LARGE)
+ model = M32R_MODEL_LARGE;
+ else
+ abort (); /* Shouldn't happen. */
+ extra_flags |= model << SYMBOL_FLAG_MODEL_SHIFT;
+
+ if (extra_flags)
+ SYMBOL_REF_FLAGS (sym) |= extra_flags;
+
+ return sym;
+}
+
/* Use a library function to move some bytes. */
+
static void
-block_move_call (dest_reg, src_reg, bytes_rtx)
- rtx dest_reg;
- rtx src_reg;
- rtx bytes_rtx;
+block_move_call (rtx dest_reg, rtx src_reg, rtx bytes_rtx)
{
/* We want to pass the size as Pmode, which will normally be SImode
but will be DImode if we are using 64 bit longs and pointers. */
&& GET_MODE (bytes_rtx) != Pmode)
bytes_rtx = convert_to_mode (Pmode, bytes_rtx, 1);
-#ifdef TARGET_MEM_FUNCTIONS
- emit_library_call (gen_rtx (SYMBOL_REF, Pmode, "memcpy"), 0,
+ emit_library_call (m32r_function_symbol ("memcpy"), 0,
VOIDmode, 3, dest_reg, Pmode, src_reg, Pmode,
convert_to_mode (TYPE_MODE (sizetype), bytes_rtx,
- TREE_UNSIGNED (sizetype)),
+ TYPE_UNSIGNED (sizetype)),
TYPE_MODE (sizetype));
-#else
- emit_library_call (gen_rtx (SYMBOL_REF, Pmode, "bcopy"), 0,
- VOIDmode, 3, src_reg, Pmode, dest_reg, Pmode,
- convert_to_mode (TYPE_MODE (integer_type_node), bytes_rtx,
- TREE_UNSIGNED (integer_type_node)),
- TYPE_MODE (integer_type_node));
-#endif
}
-/* The maximum number of bytes to copy using pairs of load/store instructions.
- If a block is larger than this then a loop will be generated to copy
- MAX_MOVE_BYTES chunks at a time. The value of 32 is a semi-arbitary choice.
- A customer uses Dhrystome as their benchmark, and Dhrystone has a 31 byte
- string copy in it. */
-#define MAX_MOVE_BYTES 32
-
/* Expand string/block move operations.
operands[0] is the pointer to the destination.
operands[3] is the alignment. */
void
-m32r_expand_block_move (operands)
- rtx operands[];
+m32r_expand_block_move (rtx operands[])
{
rtx orig_dst = operands[0];
rtx orig_src = operands[1];
/* If necessary, generate a loop to handle the bulk of the copy. */
if (bytes)
{
- rtx label;
- rtx final_src;
+ rtx label = NULL_RTX;
+ rtx final_src = NULL_RTX;
rtx at_a_time = GEN_INT (MAX_MOVE_BYTES);
rtx rounded_total = GEN_INT (bytes);
+ rtx new_dst_reg = gen_reg_rtx (SImode);
+ rtx new_src_reg = gen_reg_rtx (SImode);
/* If we are going to have to perform this loop more than
once, then generate a label and compute the address the
source register will contain upon completion of the final
- itteration. */
+ iteration. */
if (bytes > MAX_MOVE_BYTES)
{
final_src = gen_reg_rtx (Pmode);
to the word after the end of the source block, and dst_reg to point
to the last word of the destination block, provided that the block
is MAX_MOVE_BYTES long. */
- emit_insn (gen_movstrsi_internal (dst_reg, src_reg, at_a_time));
+ emit_insn (gen_movmemsi_internal (dst_reg, src_reg, at_a_time,
+ new_dst_reg, new_src_reg));
+ emit_move_insn (dst_reg, new_dst_reg);
+ emit_move_insn (src_reg, new_src_reg);
emit_insn (gen_addsi3 (dst_reg, dst_reg, GEN_INT (4)));
if (bytes > MAX_MOVE_BYTES)
}
if (leftover)
- emit_insn (gen_movstrsi_internal (dst_reg, src_reg, GEN_INT (leftover)));
+ emit_insn (gen_movmemsi_internal (dst_reg, src_reg, GEN_INT (leftover),
+ gen_reg_rtx (SImode),
+ gen_reg_rtx (SImode)));
}
\f
operands[3] is a temp register.
operands[4] is a temp register. */
-char *
-m32r_output_block_move (insn, operands)
- rtx insn ATTRIBUTE_UNUSED;
- rtx operands[];
+void
+m32r_output_block_move (rtx insn ATTRIBUTE_UNUSED, rtx operands[])
{
HOST_WIDE_INT bytes = INTVAL (operands[2]);
int first_time;
stores are done without any increment, then the remaining ones can use
the pre-increment addressing mode.
- Note: expand_block_move() also relies upon this behaviour when building
+ Note: expand_block_move() also relies upon this behavior when building
loops to copy large blocks. */
first_time = 1;
{
if (first_time)
{
- output_asm_insn ("ld\t%3, %p1", operands);
- output_asm_insn ("ld\t%4, %p1", operands);
- output_asm_insn ("st\t%3, @%0", operands);
- output_asm_insn ("st\t%4, %s0", operands);
+ output_asm_insn ("ld\t%5, %p1", operands);
+ output_asm_insn ("ld\t%6, %p1", operands);
+ output_asm_insn ("st\t%5, @%0", operands);
+ output_asm_insn ("st\t%6, %s0", operands);
}
else
{
- output_asm_insn ("ld\t%3, %p1", operands);
- output_asm_insn ("ld\t%4, %p1", operands);
- output_asm_insn ("st\t%3, %s0", operands);
- output_asm_insn ("st\t%4, %s0", operands);
+ output_asm_insn ("ld\t%5, %p1", operands);
+ output_asm_insn ("ld\t%6, %p1", operands);
+ output_asm_insn ("st\t%5, %s0", operands);
+ output_asm_insn ("st\t%6, %s0", operands);
}
bytes -= 8;
if (bytes > 4)
got_extra = 1;
- output_asm_insn ("ld\t%3, %p1", operands);
+ output_asm_insn ("ld\t%5, %p1", operands);
if (got_extra)
- output_asm_insn ("ld\t%4, %p1", operands);
+ output_asm_insn ("ld\t%6, %p1", operands);
if (first_time)
- output_asm_insn ("st\t%3, @%0", operands);
+ output_asm_insn ("st\t%5, @%0", operands);
else
- output_asm_insn ("st\t%3, %s0", operands);
+ output_asm_insn ("st\t%5, %s0", operands);
bytes -= 4;
}
valid memory [since we don't get called if things aren't properly
aligned]. */
int dst_offset = first_time ? 0 : 4;
+ /* The amount of increment we have to make to the
+ destination pointer. */
+ int dst_inc_amount = dst_offset + bytes - 4;
+ /* The same for the source pointer. */
+ int src_inc_amount = bytes;
int last_shift;
rtx my_operands[3];
/* If got_extra is true then we have already loaded
the next word as part of loading and storing the previous word. */
if (! got_extra)
- output_asm_insn ("ld\t%4, @%1", operands);
+ output_asm_insn ("ld\t%6, @%1", operands);
if (bytes >= 2)
{
bytes -= 2;
- output_asm_insn ("sra3\t%3, %4, #16", operands);
- my_operands[0] = operands[3];
+ output_asm_insn ("sra3\t%5, %6, #16", operands);
+ my_operands[0] = operands[5];
my_operands[1] = GEN_INT (dst_offset);
my_operands[2] = operands[0];
output_asm_insn ("sth\t%0, @(%1,%2)", my_operands);
if (bytes > 0)
{
- my_operands[0] = operands[4];
+ my_operands[0] = operands[6];
my_operands[1] = GEN_INT (last_shift);
output_asm_insn ("srai\t%0, #%1", my_operands);
- my_operands[0] = operands[4];
+ my_operands[0] = operands[6];
my_operands[1] = GEN_INT (dst_offset);
my_operands[2] = operands[0];
output_asm_insn ("stb\t%0, @(%1,%2)", my_operands);
}
+
+ /* Update the destination pointer if needed. We have to do
+ this so that the patterns matches what we output in this
+ function. */
+ if (dst_inc_amount
+ && !find_reg_note (insn, REG_UNUSED, operands[0]))
+ {
+ my_operands[0] = operands[0];
+ my_operands[1] = GEN_INT (dst_inc_amount);
+ output_asm_insn ("addi\t%0, #%1", my_operands);
+ }
+
+ /* Update the source pointer if needed. We have to do this
+ so that the patterns matches what we output in this
+ function. */
+ if (src_inc_amount
+ && !find_reg_note (insn, REG_UNUSED, operands[1]))
+ {
+ my_operands[0] = operands[1];
+ my_operands[1] = GEN_INT (src_inc_amount);
+ output_asm_insn ("addi\t%0, #%1", my_operands);
+ }
bytes = 0;
}
first_time = 0;
}
-
- return "";
}
-/* Return true if op is an integer constant, less than or equal to
- MAX_MOVE_BYTES. */
+/* Return true if using NEW_REG in place of OLD_REG is ok. */
+
int
-m32r_block_immediate_operand (op, mode)
- rtx op;
- enum machine_mode mode ATTRIBUTE_UNUSED;
+m32r_hard_regno_rename_ok (unsigned int old_reg ATTRIBUTE_UNUSED,
+ unsigned int new_reg)
{
- if (GET_CODE (op) != CONST_INT
- || INTVAL (op) > MAX_MOVE_BYTES
- || INTVAL (op) <= 0)
+ /* Interrupt routines can't clobber any register that isn't already used. */
+ if (lookup_attribute ("interrupt", DECL_ATTRIBUTES (current_function_decl))
+ && !regs_ever_live[new_reg])
+ return 0;
+
+ /* We currently emit epilogues as text, not rtl, so the liveness
+ of the return address register isn't visible. */
+ if (current_function_is_leaf && new_reg == RETURN_ADDR_REGNUM)
return 0;
return 1;
}
+
+rtx
+m32r_return_addr (int count)
+{
+ if (count != 0)
+ return const0_rtx;
+
+ return get_hard_reg_initial_val (Pmode, RETURN_ADDR_REGNUM);
+}
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