From: Jakub Jelinek <jakub@redhat.com>
Date: Thu, 16 Jun 2016 10:20:45 +0000 (+0200)
Subject: re PR target/71554 (Miscompilation of __builtin_mul_overflow on i686)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c577adb24fdab2a324a9c60d612c00c8d03a30e4;p=gcc.git

re PR target/71554 (Miscompilation of __builtin_mul_overflow on i686)

	PR target/71554
	* gcc.c-torture/execute/pr71554.c: New test.

From-SVN: r237512
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e720868daa6..b93a6896463 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -4,6 +4,7 @@
 
 2016-06-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/71554
 	* config/i386/i386.md (setcc + movzbl peephole2): Use reg_set_p.
 	(setcc + and peephole2): Likewise.
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7362ecc111c..b4a20edf9d0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2016-06-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/71554
+	* gcc.c-torture/execute/pr71554.c: New test.
+
 	PR rtl-optimization/71532
 	* gcc.dg/torture/pr71532.c: New test.
 
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr71554.c b/gcc/testsuite/gcc.c-torture/execute/pr71554.c
new file mode 100644
index 00000000000..f0cb4bb0778
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr71554.c
@@ -0,0 +1,28 @@
+/* PR target/71554 */
+
+int v;
+
+__attribute__ ((noinline, noclone)) void
+bar (void)
+{
+  v++;
+}
+
+__attribute__ ((noinline, noclone))
+void
+foo (unsigned int x)
+{
+  signed int y = ((-__INT_MAX__ - 1) / 2);
+  signed int r;
+  if (__builtin_mul_overflow (x, y, &r))
+    bar ();
+}
+
+int
+main ()
+{
+  foo (2);
+  if (v)
+    __builtin_abort ();
+  return 0;
+}