#include "insn-config.h"
#include "recog.h"
#include "reload.h"
-#include "real.h"
#include "toplev.h"
#include "output.h"
#include "ggc.h"
#endif
-/* Indexed by hard register number, contains 1 for registers that are
- fixed use or call used registers that cannot hold quantities across
- calls even if we are willing to save and restore them. call fixed
- registers are a subset of call used registers. */
-char call_fixed_regs[FIRST_PSEUDO_REGISTER];
+/* Contains registers that are fixed use -- i.e. in fixed_reg_set -- or
+ a function value return register or TARGET_STRUCT_VALUE_RTX or
+ STATIC_CHAIN_REGNUM. These are the registers that cannot hold quantities
+ across calls even if we are willing to save and restore them. */
-/* The same info as a HARD_REG_SET. */
HARD_REG_SET call_fixed_reg_set;
/* Indexed by hard register number, contains 1 for registers
else
CLEAR_REG_SET (regs_invalidated_by_call_regset);
- memcpy (call_fixed_regs, fixed_regs, sizeof call_fixed_regs);
-
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
{
/* call_used_regs must include fixed_regs. */
if (call_used_regs[i])
SET_HARD_REG_BIT (call_used_reg_set, i);
- if (call_fixed_regs[i])
- SET_HARD_REG_BIT (call_fixed_reg_set, i);
/* There are a couple of fixed registers that we know are safe to
exclude from being clobbered by calls:
}
}
+ COPY_HARD_REG_SET(call_fixed_reg_set, fixed_reg_set);
+
/* Preserve global registers if called more than once. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
{
if (global_regs[i])
{
- fixed_regs[i] = call_used_regs[i] = call_fixed_regs[i] = 1;
+ fixed_regs[i] = call_used_regs[i] = 1;
SET_HARD_REG_BIT (fixed_reg_set, i);
SET_HARD_REG_BIT (call_used_reg_set, i);
SET_HARD_REG_BIT (call_fixed_reg_set, i);
reinit_regs (void)
{
init_regs ();
+ /* caller_save needs to be re-initialized. */
+ caller_save_initialized_p = false;
ira_init ();
}
if (fixed_regs[i])
return;
- fixed_regs[i] = call_used_regs[i] = call_fixed_regs[i] = 1;
+ fixed_regs[i] = call_used_regs[i] = 1;
#ifdef CALL_REALLY_USED_REGISTERS
call_really_used_regs[i] = 1;
#endif
run. */
static struct reg_pref *reg_pref;
+/* Current size of reg_info. */
+static int reg_info_size;
+
/* Return the reg_class in which pseudo reg number REGNO is best allocated.
This function is sometimes called before the info has been computed.
When that happens, just return GENERAL_REGS, which is innocuous. */
\f
-/* Current size of reg_info. */
-static int reg_info_size;
-
/* Allocate space for reg info. */
static void
allocate_reg_info (void)
}
-/* Resize reg info. The new elements will be uninitialized. */
+/* Resize reg info. The new elements will be uninitialized. Return
+ TRUE if new elements (for new pseudos) were added. */
bool
resize_reg_info (void)
{
int old;
- gcc_assert (reg_pref != NULL);
+ if (reg_pref == NULL)
+ {
+ allocate_reg_info ();
+ return true;
+ }
if (reg_info_size == max_reg_num ())
return false;
old = reg_info_size;
}
/* Initialize some global data for this pass. */
-static unsigned int
+static unsigned int
reginfo_init (void)
{
if (df)
/* This prevents dump_flow_info from losing if called
before reginfo is run. */
reg_pref = NULL;
- allocate_reg_info ();
/* No more global register variables may be declared. */
no_global_reg_vars = 1;
return 1;
{
if (reg_pref == NULL)
return;
+ gcc_assert (reg_info_size == max_reg_num ());
reg_pref[regno].prefclass = prefclass;
reg_pref[regno].altclass = altclass;
reg_pref[regno].coverclass = coverclass;
}
/* Call record_subregs_of_mode for all the subregs in X. */
-static void
+static void
find_subregs_of_mode (rtx x)
{
enum rtx_code code = GET_CODE (x);
if (code == SUBREG)
record_subregs_of_mode (x);
-
+
/* Time for some deep diving. */
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
}
}
-static unsigned int
+void
init_subregs_of_mode (void)
{
basic_block bb;
FOR_BB_INSNS (bb, insn)
if (INSN_P (insn))
find_subregs_of_mode (PATTERN (insn));
-
- return 0;
}
/* Return 1 if REGNO has had an invalid mode change in CLASS from FROM
return false;
}
-static unsigned int
+void
finish_subregs_of_mode (void)
{
htab_delete (subregs_of_mode);
subregs_of_mode = 0;
- return 0;
}
#else
-static unsigned int
+void
init_subregs_of_mode (void)
{
- return 0;
}
-static unsigned int
+void
finish_subregs_of_mode (void)
{
- return 0;
}
#endif /* CANNOT_CHANGE_MODE_CLASS */
-static bool
-gate_subregs_of_mode_init (void)
-{
-#ifdef CANNOT_CHANGE_MODE_CLASS
- return true;
-#else
- return false;
-#endif
-}
-
-struct rtl_opt_pass pass_subregs_of_mode_init =
-{
- {
- RTL_PASS,
- "subregs_of_mode_init", /* name */
- gate_subregs_of_mode_init, /* gate */
- init_subregs_of_mode, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_NONE, /* tv_id */
- 0, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0 /* todo_flags_finish */
- }
-};
-
-struct rtl_opt_pass pass_subregs_of_mode_finish =
-{
- {
- RTL_PASS,
- "subregs_of_mode_finish", /* name */
- gate_subregs_of_mode_init, /* gate */
- finish_subregs_of_mode, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_NONE, /* tv_id */
- 0, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0 /* todo_flags_finish */
- }
-};
-
-
#include "gt-reginfo.h"
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