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* jump.c (comparison_dominates_p): Support unordered compares. 

From-SVN: r38776
This commit is contained in:
Jan Hubicka 2001-01-07 14:45:33 +01:00 committed by Jan Hubicka
parent 1f36a2ddaa
commit b34878a37b
2 changed files with 23 additions and 3 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
Sun Jan 7 14:44:19 MET 2001 Jan Hubicka <jh@suse.cz>
* jump.c (comparison_dominates_p): Support unordered compares.
Sun Jan 7 14:39:07 MET 2001 Jan Hubicka <jh@suse.cz>
* simplify-rtx.c (simplify_relational_operation): Always simplify

22
gcc/jump.c
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@ -2004,19 +2004,34 @@ comparison_dominates_p (code1, code2)
switch (code1)
{
case UNEQ:
if (code2 == UNLE || code2 == UNGE)
return 1;
break;
case EQ:
if (code2 == LE || code2 == LEU || code2 == GE || code2 == GEU
|| code2 == ORDERED)
return 1;
break;
case UNLT:
if (code2 == UNLE || code2 == NE)
return 1;
break;
case LT:
if (code2 == LE || code2 == NE || code2 == ORDERED)
if (code2 == LE || code2 == NE || code2 == ORDERED || code2 == LTGT)
return 1;
break;
case UNGT:
if (code2 == UNGE || code2 == NE)
return 1;
break;
case GT:
if (code2 == GE || code2 == NE || code2 == ORDERED)
if (code2 == GE || code2 == NE || code2 == ORDERED || code2 == LTGT)
return 1;
break;
@ -2042,7 +2057,8 @@ comparison_dominates_p (code1, code2)
break;
case UNORDERED:
if (code2 == NE)
if (code2 == NE || code2 == UNEQ || code2 == UNLE || code2 == UNLT
|| code2 == UNGE || code2 == UNGT)
return 1;
break;