From: glisse <glisse@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 2 May 2016 14:32:53 +0000 (+0000)
Subject: Canonicalize X u< X to UNORDERED_EXPR
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=47ef9633e510b93bf34139d48538d5d6ee4912d1;p=thirdparty%2Fgcc.git

Canonicalize X u< X to UNORDERED_EXPR

2016-05-02  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* match.pd (X u< X, X u> X): New transformations.

gcc/testsuite/
	* gcc.dg/tree-ssa/unord.c: New testcase.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@235761 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 10bf855f351f..435a9622761e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2016-05-02  Marc Glisse  <marc.glisse@inria.fr>
+
+	* match.pd (X u< X, X u> X): New transformations.
+
 2016-05-02  Marc Glisse  <marc.glisse@inria.fr>
 
 	* flag-types.h (enum warn_strict_overflow_code): Move ...
diff --git a/gcc/match.pd b/gcc/match.pd
index f1b1f1541256..8de8858b1511 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -1921,6 +1921,10 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
  (simplify
   (cmp @0 @0)
   { constant_boolean_node (true, type); }))
+(for cmp (unlt ungt)
+ (simplify
+  (cmp @0 @0)
+  (unordered @0 @0)))
 (simplify
  (ltgt @0 @0)
  (if (!flag_trapping_math)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f40758432842..2ea3d7700e3f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2016-05-02  Marc Glisse  <marc.glisse@inria.fr>
+
+	* gcc.dg/tree-ssa/unord.c: New testcase.
+
 2016-05-02  Marc Glisse  <marc.glisse@inria.fr>
 
 	* gcc.dg/tree-ssa/20040305-1.c: Adjust.
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/unord.c b/gcc/testsuite/gcc.dg/tree-ssa/unord.c
new file mode 100644
index 000000000000..e0927925d5a0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/unord.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-optimized" } */
+
+int f(double a){double b=a;return !__builtin_islessequal(a,b);}
+int g(double a){double b=a;return !__builtin_isgreaterequal(a,b);}
+
+/* { dg-final { scan-tree-dump-times " unord " 2 "optimized" } } */