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s390.c (s390_optimize_prologue): Don't replace an insn saving less registers than the replacement.

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2005-05-23  Andreas Krebbel  <krebbel1@de.ibm.com>

	* config/s390/s390.c (s390_optimize_prologue): Don't replace an insn
	saving less registers than the replacement.

From-SVN: r100081
This commit is contained in:
Andreas Krebbel 2005-05-23 16:43:06 +00:00 committed by Ulrich Weigand
parent 52f6de6c7b
commit 22a707a497
2 changed files with 17 additions and 22 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2005-05-23 Andreas Krebbel <krebbel1@de.ibm.com>
* config/s390/s390.c (s390_optimize_prologue): Don't replace an insn
saving less registers than the replacement.
2005-05-23 Jan Hubicka <jh@suse.cz>
* tree-flow.h (stmt_ann_d): Kill GTY ((skip)) mark on BB.

34
gcc/config/s390/s390.c
View File

@ -7951,6 +7951,10 @@ s390_optimize_prologue (void)
if (GET_CODE (base) != REG || off < 0)
continue;
if (cfun_frame_layout.first_save_gpr != -1
&& (cfun_frame_layout.first_save_gpr < first
|| cfun_frame_layout.last_save_gpr > last))
continue;
if (REGNO (base) != STACK_POINTER_REGNUM
&& REGNO (base) != HARD_FRAME_POINTER_REGNUM)
continue;
@ -7972,7 +7976,8 @@ s390_optimize_prologue (void)
continue;
}
if (GET_CODE (PATTERN (insn)) == SET
if (cfun_frame_layout.first_save_gpr == -1
&& GET_CODE (PATTERN (insn)) == SET
&& GET_CODE (SET_SRC (PATTERN (insn))) == REG
&& (REGNO (SET_SRC (PATTERN (insn))) == BASE_REGNUM
|| (!TARGET_CPU_ZARCH
@ -7990,16 +7995,6 @@ s390_optimize_prologue (void)
if (REGNO (base) != STACK_POINTER_REGNUM
&& REGNO (base) != HARD_FRAME_POINTER_REGNUM)
continue;
if (cfun_frame_layout.first_save_gpr != -1)
{
new_insn = save_gprs (base,
off + (cfun_frame_layout.first_save_gpr
- first) * UNITS_PER_WORD,
cfun_frame_layout.first_save_gpr,
cfun_frame_layout.last_save_gpr);
new_insn = emit_insn_before (new_insn, insn);
INSN_ADDRESSES_NEW (new_insn, -1);
}
remove_insn (insn);
continue;
@ -8017,6 +8012,10 @@ s390_optimize_prologue (void)
if (GET_CODE (base) != REG || off < 0)
continue;
if (cfun_frame_layout.first_restore_gpr != -1
&& (cfun_frame_layout.first_restore_gpr < first
|| cfun_frame_layout.last_restore_gpr > last))
continue;
if (REGNO (base) != STACK_POINTER_REGNUM
&& REGNO (base) != HARD_FRAME_POINTER_REGNUM)
continue;
@ -8038,7 +8037,8 @@ s390_optimize_prologue (void)
continue;
}
if (GET_CODE (PATTERN (insn)) == SET
if (cfun_frame_layout.first_restore_gpr == -1
&& GET_CODE (PATTERN (insn)) == SET
&& GET_CODE (SET_DEST (PATTERN (insn))) == REG
&& (REGNO (SET_DEST (PATTERN (insn))) == BASE_REGNUM
|| (!TARGET_CPU_ZARCH
@ -8056,16 +8056,6 @@ s390_optimize_prologue (void)
if (REGNO (base) != STACK_POINTER_REGNUM
&& REGNO (base) != HARD_FRAME_POINTER_REGNUM)
continue;
if (cfun_frame_layout.first_restore_gpr != -1)
{
new_insn = restore_gprs (base,
off + (cfun_frame_layout.first_restore_gpr
- first) * UNITS_PER_WORD,
cfun_frame_layout.first_restore_gpr,
cfun_frame_layout.last_restore_gpr);
new_insn = emit_insn_before (new_insn, insn);
INSN_ADDRESSES_NEW (new_insn, -1);
}
remove_insn (insn);
continue;