From: Andrew MacLeod <amacleod@redhat.com>
Date: Wed, 20 Jan 2021 21:27:34 +0000 (-0500)
Subject: Re: trapv question
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=842afc4e289ed3fe69583672c1a180f268d73799;p=gcc.git

Re: trapv question

Adjust testcase to so the ADD that is expected to overflow cannot
be optimized.

	gcc/testsuite
	* gcc.dg/torture/ftrapv-2.c: Make overflow instruction unremovable.
---

diff --git a/gcc/testsuite/gcc.dg/torture/ftrapv-2.c b/gcc/testsuite/gcc.dg/torture/ftrapv-2.c
index 75e464fe557..4d746c9ce5c 100644
--- a/gcc/testsuite/gcc.dg/torture/ftrapv-2.c
+++ b/gcc/testsuite/gcc.dg/torture/ftrapv-2.c
@@ -12,7 +12,7 @@
 
 /* Verify SImode operations properly trap.  PR middle-end/68046 */
 
-int i = 0x7fffffff;
+volatile int i = 0x7fffffff;
 
 int main(void)
 {
@@ -20,7 +20,7 @@ int main(void)
   int status = 0;
   if (child == 0)
     {
-      volatile int x = i + 1 < i;
+      i = i + 1;
       exit (0);
     }
   else if (child == -1)