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ira.c (pseudo_move_insn): Delete.

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gcc/
	* ira.c (pseudo_move_insn): Delete.
	(find_moveable_pseudos): Don't set it.
	(move_unallocated_pseudos): Use DF_REG_DEF_CHAIN to find
	the definitions of the original pseudo.  Delete all of them.

From-SVN: r187582
This commit is contained in:
Richard Sandiford 2012-05-16 09:01:54 +00:00 committed by Richard Sandiford
parent a7c6c6d64d
commit a36b270612
2 changed files with 19 additions and 14 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-05-16 Richard Sandiford <r.sandiford@uk.ibm.com>
* ira.c (pseudo_move_insn): Delete.
(find_moveable_pseudos): Don't set it.
(move_unallocated_pseudos): Use DF_REG_DEF_CHAIN to find
the definitions of the original pseudo. Delete all of them.
2012-05-16 Olivier Hainque <hainque@adacore.com>
* config/rs6000/rs6000-opts.h (enum processor_type): Add

26
gcc/ira.c
View File

@ -3621,9 +3621,6 @@ int first_moveable_pseudo, last_moveable_pseudo;
first_moveable_pseudo. */
/* The original home register. */
static VEC (rtx, heap) *pseudo_replaced_reg;
/* The move instruction we added to move the value to its original home
register. */
static VEC (rtx, heap) *pseudo_move_insn;
/* Look for instances where we have an instruction that is known to increase
register pressure, and whose result is not used immediately. If it is
@ -3667,9 +3664,7 @@ find_moveable_pseudos (void)
bitmap_initialize (&interesting, 0);
first_moveable_pseudo = max_regs;
VEC_free (rtx, heap, pseudo_move_insn);
VEC_free (rtx, heap, pseudo_replaced_reg);
VEC_safe_grow (rtx, heap, pseudo_move_insn, max_regs);
VEC_safe_grow (rtx, heap, pseudo_replaced_reg, max_regs);
df_analyze ();
@ -3965,10 +3960,8 @@ find_moveable_pseudos (void)
if (validate_change (def_insn, DF_REF_LOC (def), newreg, 0))
{
unsigned nregno = REGNO (newreg);
rtx move = emit_insn_before (gen_move_insn (def_reg, newreg),
use_insn);
emit_insn_before (gen_move_insn (def_reg, newreg), use_insn);
nregno -= max_regs;
VEC_replace (rtx, pseudo_move_insn, nregno, move);
VEC_replace (rtx, pseudo_replaced_reg, nregno, def_reg);
}
}
@ -4011,27 +4004,32 @@ move_unallocated_pseudos (void)
for (i = first_moveable_pseudo; i < last_moveable_pseudo; i++)
if (reg_renumber[i] < 0)
{
df_ref def = DF_REG_DEF_CHAIN (i);
int idx = i - first_moveable_pseudo;
rtx other_reg = VEC_index (rtx, pseudo_replaced_reg, idx);
rtx def_insn = DF_REF_INSN (def);
rtx move_insn = VEC_index (rtx, pseudo_move_insn, idx);
rtx set;
rtx def_insn = DF_REF_INSN (DF_REG_DEF_CHAIN (i));
/* The use must follow all definitions of OTHER_REG, so we can
insert the new definition immediately after any of them. */
df_ref other_def = DF_REG_DEF_CHAIN (REGNO (other_reg));
rtx move_insn = DF_REF_INSN (other_def);
rtx newinsn = emit_insn_after (PATTERN (def_insn), move_insn);
rtx set;
int success;
if (dump_file)
fprintf (dump_file, "moving def of %d (insn %d now) ",
REGNO (other_reg), INSN_UID (def_insn));
delete_insn (move_insn);
while ((other_def = DF_REG_DEF_CHAIN (REGNO (other_reg))))
delete_insn (DF_REF_INSN (other_def));
delete_insn (def_insn);
set = single_set (newinsn);
success = validate_change (newinsn, &SET_DEST (set), other_reg, 0);
gcc_assert (success);
if (dump_file)
fprintf (dump_file, " %d) rather than keep unallocated replacement %d\n",
INSN_UID (newinsn), i);
delete_insn (move_insn);
delete_insn (def_insn);
SET_REG_N_REFS (i, 0);
}
}