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simplify-rtx.c (simplify_const_relational_operation): When extracting arguments of a COMPARE, recompute the mode as well.

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* simplify-rtx.c (simplify_const_relational_operation): When
	extracting arguments of a COMPARE, recompute the mode as well.

From-SVN: r103143
This commit is contained in:
Ulrich Weigand 2005-08-16 02:01:27 +00:00 committed by Ulrich Weigand
parent 4e5c1f1035
commit 5b5dc47588
2 changed files with 16 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2005-08-15 Ulrich Weigand <uweigand@de.ibm.com>
* simplify-rtx.c (simplify_const_relational_operation): When
extracting arguments of a COMPARE, recompute the mode as well.
2005-08-15 Ian Lance Taylor <ian@airs.com>
* tree.c (build_string): Mark tree CONSTANT and INVARIANT.

12
gcc/simplify-rtx.c
View File

@ -3014,7 +3014,17 @@ simplify_const_relational_operation (enum rtx_code code,
/* If op0 is a compare, extract the comparison arguments from it. */
if (GET_CODE (op0) == COMPARE && op1 == const0_rtx)
op1 = XEXP (op0, 1), op0 = XEXP (op0, 0);
{
op1 = XEXP (op0, 1);
op0 = XEXP (op0, 0);
if (GET_MODE (op0) != VOIDmode)
mode = GET_MODE (op0);
else if (GET_MODE (op1) != VOIDmode)
mode = GET_MODE (op1);
else
return 0;
}
/* We can't simplify MODE_CC values since we don't know what the
actual comparison is. */