gcc/gcc43-pr37879.patch

60 lines
1.3 KiB
Diff
Raw Normal View History

2008-11-05 10:15:48 +00:00
2008-10-27 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/37879
* predict.c (tree_estimate_probability): Check if last_stmt is
non-NULL before dereferencing it.
* gcc.dg/pr37879.c: New test.
--- gcc/predict.c (revision 141389)
+++ gcc/predict.c (revision 141390)
@@ -1374,6 +1374,7 @@ tree_estimate_probability (void)
{
edge e;
edge_iterator ei;
+ tree last;
FOR_EACH_EDGE (e, ei, bb->succs)
{
@@ -1396,7 +1397,8 @@ tree_estimate_probability (void)
&& e->dest != EXIT_BLOCK_PTR
&& single_succ_p (e->dest)
&& single_succ_edge (e->dest)->dest == EXIT_BLOCK_PTR
- && TREE_CODE (last_stmt (e->dest)) == RETURN_EXPR)
+ && (last = last_stmt (e->dest)) != NULL_TREE
+ && TREE_CODE (last) == RETURN_EXPR)
{
edge e1;
edge_iterator ei1;
--- gcc/testsuite/gcc.dg/pr37879.c (revision 0)
+++ gcc/testsuite/gcc.dg/pr37879.c (revision 141390)
@@ -0,0 +1,28 @@
+/* PR tree-optimization/37879 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+static inline void bar (int) __attribute__ ((noreturn));
+void baz () __attribute__ ((noreturn));
+
+inline int
+foo (int i)
+{
+ return i;
+}
+
+int i = 23;
+static inline void
+bar (int j)
+{
+ if (j)
+ asm ("");
+} /* { dg-warning "does return" } */
+
+void
+baz ()
+{
+ int j;
+ bar (foo (j = i++));
+ asm ("");
+}