2009-04-03 Richard Guenther <rguenther@suse.de>
PR tree-optimization/2480
PR tree-optimization/23086
* gcc.dg/tree-ssa/pr2480.c: New testcase.
* gcc.dg/tree-ssa/pr23086.c: Likewise.
From-SVN: r145499
+2009-04-03 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/2480
+ PR tree-optimization/23086
+ * gcc.dg/tree-ssa/pr2480.c: New testcase.
+ * gcc.dg/tree-ssa/pr23086.c: Likewise.
+
2009-04-03 Richard Guenther <rguenther@suse.de>
PR tree-optimization/34743
--- /dev/null
+/* { dg-do run } */
+/* { dg-options "-O -fdump-tree-optimized" } */
+
+extern void link_error (void);
+extern void abort (void);
+
+int *t;
+int __attribute__((noinline)) g(int *a)
+{
+ t = a;
+ *a = 2;
+}
+
+void __attribute__((noinline)) f(int *a)
+{
+ int b;
+ b = 1;
+ g(&b);
+ b = 2;
+ *a = 1;
+ if (b != 2)
+ link_error();
+}
+
+int main(void)
+{
+ int t;
+ f(&t);
+ if (t != 1)
+ abort ();
+ return 0;
+}
+
+/* { dg-final { scan-tree-dump-not "link_error" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
--- /dev/null
+/* { dg-do link } */
+/* { dg-options "-O2" } */
+
+/* We have enough cascading at -O2 to cover the missed control-dependence
+ in SCCVN (which considers the link_error calls to clobber the structs). */
+
+struct example
+{
+ char a;
+ int b;
+ char c;
+} *ex1;
+
+extern void link_error(void);
+
+void
+bar (void)
+{
+ ex1->a = 1;
+ ex1->b = 2;
+ ex1->c = 3;
+
+ if (ex1->a != 1)
+ link_error ();
+ if (ex1->b != 2)
+ link_error ();
+ if (ex1->c != 3)
+ link_error ();
+
+}
+
+void
+foo (struct example *ex2)
+{
+ ex2->a = 1;
+ ex2->b = 2;
+ ex2->c = 3;
+
+ if (ex2->a != 1)
+ link_error ();
+ if (ex2->b != 2)
+ link_error ();
+ if (ex2->c != 3)
+ link_error ();
+
+}
+
+int main (void)
+{
+ bar ();
+ foo (ex1);
+ return 0;
+}