From: Eric Botcazou <ebotcazou@adacore.com>
Date: Thu, 22 Nov 2018 16:29:50 +0000 (+0000)
Subject: backport: re PR rtl-optimization/85925 (compilation of masking with 257 goes wrong... 
X-Git-Tag: releases/gcc-7.4.0~31
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce728b0c047a5237878fc30e107c592b95618945;p=thirdparty%2Fgcc.git

backport: re PR rtl-optimization/85925 (compilation of masking with 257 goes wrong in combine at -02)

	Backport from mainline
	2018-11-21  Jakub Jelinek  <jakub@redhat.com>

	PR rtl-optimization/85925
	* gcc.c-torture/execute/20181120-1.c: Require effective target
	int32plus.
	(u): New variable.
	(main): Compare d against u.f1 rather than 0x101.  Use 0x4030201
	instead of 0x10101.

From-SVN: r266384
---

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 58e8566b9e87..96fd6de6cf6a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,15 @@
+2018-11-22  Eric Botcazou  <ebotcazou@adacore.com>
+
+	Backport from mainline
+	2018-11-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/85925
+	* gcc.c-torture/execute/20181120-1.c: Require effective target
+	int32plus.
+	(u): New variable.
+	(main): Compare d against u.f1 rather than 0x101.  Use 0x4030201
+	instead of 0x10101.
+
 2018-11-21  Mihail Ionescu  <mihail.ionescu@arm.com>
 
 	PR target/87867
diff --git a/gcc/testsuite/gcc.c-torture/execute/20181120-1.c b/gcc/testsuite/gcc.c-torture/execute/20181120-1.c
index 21e5f7a71fe3..da3d4552a2ff 100644
--- a/gcc/testsuite/gcc.c-torture/execute/20181120-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/20181120-1.c
@@ -1,4 +1,5 @@
 /* PR rtl-optimization/85925 */
+/* { dg-require-effective-target int32plus } */
 /* Testcase by <sudi@gcc.gnu.org> */
 
 int a, c, d;
@@ -9,17 +10,18 @@ union U1 {
   unsigned f0;
   unsigned f1 : 15;
 };
+volatile union U1 u = { 0x4030201 };
 
 int main (void)
 {
   for (c = 0; c <= 1; c++) {
-    union U1 f = {0x10101};
+    union U1 f = {0x4030201};
     if (c == 1)
       b;
     *e = f.f1;
   }
 
-  if (d != 0x101)
+  if (d != u.f1)
     __builtin_abort ();
 
   return 0;