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(try_combine): When substituting in output of I2, ensure dest isn't

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clobbered in I2.

From-SVN: r11773
This commit is contained in:
Richard Kenner 1996-04-14 20:42:14 -04:00
parent c2d12c8b86
commit 7ca919b759
1 changed files with 2 additions and 1 deletions
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3
gcc/combine.c
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@ -1307,7 +1307,8 @@ try_combine (i3, i2, i1)
The problem can also happen if the dest of I3 is a memory ref,
if another dest in I2 is an indirect memory ref. */
for (i = 0; i < XVECLEN (p2, 0); i++)
if (GET_CODE (XVECEXP (p2, 0, i)) == SET
if ((GET_CODE (XVECEXP (p2, 0, i)) == SET
|| GET_CODE (XVECEXP (p2, 0, i)) == CLOBBER)
&& reg_overlap_mentioned_p (SET_DEST (PATTERN (i3)),
SET_DEST (XVECEXP (p2, 0, i))))
break;