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re PR tree-optimization/70317 (folding x<=x to true for large vectors, ignoring nans)

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PR tree-optimization/70317
	* match.pd (cmp @0 @0): Pass @0 instead of TYPE_MODE (TREE_TYPE (@0))
	to HONOR_NANS.

	* gcc.dg/pr70317.c: New test.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r234382
This commit is contained in:
Marc Glisse 2016-03-21 22:03:44 +01:00 committed by Jakub Jelinek
parent 4a148e19be
commit b94078834d
4 changed files with 41 additions and 2 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2016-03-21 Marc Glisse <marc.glisse@inria.fr>
Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/70317
* match.pd (cmp @0 @0): Pass @0 instead of TYPE_MODE (TREE_TYPE (@0))
to HONOR_NANS.
2016-03-21 Uros Bizjak <ubizjak@gmail.com>
PR target/70327

4
gcc/match.pd
View File

@ -1866,7 +1866,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(simplify
(cmp @0 @0)
(if (! FLOAT_TYPE_P (TREE_TYPE (@0))
|| ! HONOR_NANS (TYPE_MODE (TREE_TYPE (@0))))
|| ! HONOR_NANS (@0))
{ constant_boolean_node (true, type); }
(if (cmp != EQ_EXPR)
(eq @0 @0)))))
@ -1875,7 +1875,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(cmp @0 @0)
(if (cmp != NE_EXPR
|| ! FLOAT_TYPE_P (TREE_TYPE (@0))
|| ! HONOR_NANS (TYPE_MODE (TREE_TYPE (@0))))
|| ! HONOR_NANS (@0))
{ constant_boolean_node (false, type); })))
(for cmp (unle unge uneq)
(simplify

6
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,9 @@
2016-03-21 Marc Glisse <marc.glisse@inria.fr>
Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/70317
* gcc.dg/pr70317.c: New test.
2016-03-21 Uros Bizjak <ubizjak@gmail.com>
PR target/70327

26
gcc/testsuite/gcc.dg/pr70317.c Normal file
View File

@ -0,0 +1,26 @@
/* PR tree-optimization/70317 */
/* { dg-do compile } */
/* { dg-skip-if "No NaN support" { spu*-*-* vax*-*-* pdp11*-*-* } } */
/* { dg-options "-O2 -fdump-tree-optimized" } */
typedef double V __attribute__((vector_size (256)));
typedef __typeof ((V) {} < (V) {}) T;
T a, b;
__attribute__((noinline, noclone, optimize ("finite-math-only"))) void
foo (V *x)
{
V z = *x;
a = z <= z;
}
/* { dg-final { scan-tree-dump "a\[^\n\r]*= . -1, -1," "optimized" } } */
__attribute__((noinline, noclone, optimize ("no-finite-math-only"))) void
bar (V *x)
{
V z = *x;
b = z <= z;
}
/* { dg-final { scan-tree-dump-not "b\[^\n\r]*= . -1, -1," "optimized" } } */