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flow.c (mark_used_reg): Use reg_set_p to determine if a register was modified in the current insn. 

* flow.c (mark_used_reg): Use reg_set_p to determine if a register
        was modified in the current insn.

From-SVN: r33030
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Richard Henderson 2000-04-08 15:38:38 -07:00 committed by Richard Henderson
parent 83ffeecd1d
commit 729a708984
2 changed files with 12 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2000-04-08 Richard Henderson <rth@cygnus.com>
* flow.c (mark_used_reg): Use reg_set_p to determine if a register
was modified in the current insn.
2000-04-08 Richard Earnshaw (rearnsha@arm.com)
* arm/thumb.md: Delete.

8
gcc/flow.c
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@ -4520,11 +4520,17 @@ mark_used_reg (pbi, new_live, reg, cond, insn)
/* Record and count the insns in which a reg dies. If it is used in
this insn and was dead below the insn then it dies in this insn.
If it was set in this insn, we do not make a REG_DEAD note;
likewise if we already made such a note. */
likewise if we already made such a note. Recall that dead_or_set_p
checks for complete overlap, and thus is not suitable for the first
case. But it does handle the existing note case. Also recall that
reg_set_p, when presented with the complete insn, will try to infer
things about a call_insn that we do not wish. */
if ((pbi->flags & PROP_DEATH_NOTES)
&& some_was_dead
&& ! reg_set_p (reg, PATTERN (insn))
&& ! dead_or_set_p (insn, reg))
{
int n;