./:

	PR tree-optimization/31602
	* tree-ssa-loop-ch.c (copy_loop_headers): Set TREE_NO_WARNING for
	conditionals in the copied loop header.
	* tree-cfg.c (fold_cond_expr_cond): Don't issue undefined overflow
	warnings if TREE_NO_WARNING is set.
	* doc/invoke.texi (Warning Options): Clarify that
	-Wstrict-overflow does not warn about loops.
testsuite/:
	PR tree-optimization/31602
	* gcc.dg/Wstrict-overflow-11.c: We no longer issue a warning.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@124120 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 4 insertions, 2 deletions

diff --git a/gcc/testsuite/gcc.dg/Wstrict-overflow-11.c b/gcc/testsuite/gcc.dg/Wstrict-overflow-11.c
index c98610e48a6..3caf1cb6f09 100644
--- a/gcc/testsuite/gcc.dg/Wstrict-overflow-11.c
+++ b/gcc/testsuite/gcc.dg/Wstrict-overflow-11.c
@@ -3,14 +3,16 @@
 
 /* Based on strict-overflow-5.c.  */
 
-/* We can only unroll when using strict overflow semantics.  */
+/* We can only unroll when using strict overflow semantics.  But we
+   don't issue a warning for relying on undefined overflow in
+   loops.  */
 
 int foo (int i)
 {
   int index;
   int r=0;
  
-  for (index = i; index <= i+4; index+=2) /* { dg-warning "assuming signed overflow does not occur" "correct warning" } */
+  for (index = i; index <= i+4; index+=2)
     r++;
  
   return r;