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simplify-rtx.c (simplify_relational_operation): Always simplify ORDERED and UNORDERED when FLAG_FAST_MATH.

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* simplify-rtx.c (simplify_relational_operation): Always simplify
	ORDERED and UNORDERED when FLAG_FAST_MATH.  Handle properly UNLE
	and UNGE.

From-SVN: r38775
This commit is contained in:
Jan Hubicka 2001-01-07 14:40:09 +01:00 committed by Jan Hubicka
parent 69bc0a1faf
commit 1f36a2ddaa
2 changed files with 14 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Sun Jan 7 14:39:07 MET 2001 Jan Hubicka <jh@suse.cz>
* simplify-rtx.c (simplify_relational_operation): Always simplify
ORDERED and UNORDERED when FLAG_FAST_MATH. Handle properly UNLE
and UNGE.
Sun Jan 7 14:35:13 MET 2001 Jan Hubicka <jh@suse.cz>
* combine.c (combine_simplify_rtx): Recognize the unordered compares.

8
gcc/simplify-rtx.c
View File

@ -1762,6 +1762,12 @@ simplify_relational_operation (code, mode, op0, op1)
return simplify_relational_operation (signed_condition (code),
mode, tem, const0_rtx);
if (flag_fast_math && code == ORDERED)
return const_true_rtx;
if (flag_fast_math && code == UNORDERED)
return const0_rtx;
/* For non-IEEE floating-point, if the two operands are equal, we know the
result. */
if (rtx_equal_p (op0, op1)
@ -1953,8 +1959,10 @@ simplify_relational_operation (code, mode, op0, op1)
case GTU:
return op1ltu ? const_true_rtx : const0_rtx;
case LE:
case UNLE:
return equal || op0lt ? const_true_rtx : const0_rtx;
case GE:
case UNGE:
return equal || op1lt ? const_true_rtx : const0_rtx;
case LEU:
return equal || op0ltu ? const_true_rtx : const0_rtx;