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flow.c (mark_used_regs): Revert last change.

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* flow.c (mark_used_regs): Revert last change.
(life_analysis): Remove PROP_AUTOINC if running after reload.
(propagate_one_insn): PROP_AUTOINC is always off after reload.

From-SVN: r34499
This commit is contained in:
Richard Earnshaw 2000-06-12 14:40:24 +00:00 committed by Richard Earnshaw
parent 1565e32cd3
commit 61f286b64c
2 changed files with 15 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2000-06-12 Richard Earnshaw <rearnsha@arm.com>
* flow.c (mark_used_regs): Revert last change.
(life_analysis): Remove PROP_AUTOINC if running after reload.
(propagate_one_insn): PROP_AUTOINC is always off after reload.
2000-06-11 Richard Earnshaw <rearnsha@arm.com>
* flow.c (mark_used_regs): Don't call find_auto_inc after reload

15
gcc/flow.c
View File

@ -2606,9 +2606,13 @@ life_analysis (f, file, flags)
Otherwise offsets and such may be incorrect.
Reload will make some registers as live even though they do not
appear in the rtl. */
appear in the rtl.
We don't want to create new auto-incs after reload, since they
are unlikely to be useful and can cause problems with shared
stack slots. */
if (reload_completed)
flags &= ~PROP_REG_INFO;
flags &= ~(PROP_REG_INFO | PROP_AUTOINC);
/* We want alias analysis information for local dead store elimination. */
if (flags & PROP_SCAN_DEAD_CODE)
@ -3466,8 +3470,7 @@ propagate_one_insn (pbi, insn)
register rtx x = single_set (insn);
/* Does this instruction increment or decrement a register? */
if (!reload_completed
&& (flags & PROP_AUTOINC)
if ((flags & PROP_AUTOINC)
&& x != 0
&& GET_CODE (SET_DEST (x)) == REG
&& (GET_CODE (SET_SRC (x)) == PLUS
@ -5254,7 +5257,7 @@ mark_used_regs (pbi, x, cond, insn)
}
#ifdef AUTO_INC_DEC
if (! reload_completed && (flags & PROP_AUTOINC))
if (flags & PROP_AUTOINC)
find_auto_inc (pbi, x, insn);
#endif
break;
@ -5287,7 +5290,7 @@ mark_used_regs (pbi, x, cond, insn)
if (GET_CODE (testreg) == MEM)
{
#ifdef AUTO_INC_DEC
if (! reload_completed && (flags & PROP_AUTOINC))
if (flags & PROP_AUTOINC)
find_auto_inc (pbi, testreg, insn);
#endif
mark_used_regs (pbi, XEXP (testreg, 0), cond, insn);