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PATCH: PR tree-optimization/43904: Wrong code with -foptimize-sibling-calls and memcpy on x86_64
- From: "H.J. Lu" <hongjiu dot lu at intel dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Mon, 26 Apr 2010 17:27:31 -0700
- Subject: PATCH: PR tree-optimization/43904: Wrong code with -foptimize-sibling-calls and memcpy on x86_64
- Reply-to: "H.J. Lu" <hjl dot tools at gmail dot com>
Hi,
PR 43904 is a dup of PR 43572. I am checking in the run-time testcase
for PR 43904.
H.J.
---
Index: gcc.dg/tree-ssa/tailcall-6.c
===================================================================
--- gcc.dg/tree-ssa/tailcall-6.c (revision 0)
+++ gcc.dg/tree-ssa/tailcall-6.c (revision 0)
@@ -0,0 +1,33 @@
+/* PR tree-optimization/43904. */
+/* { dg-do run } */
+/* { dg-options "-O1 -foptimize-sibling-calls" } */
+
+typedef __SIZE_TYPE__ size_t;
+extern void abort(void);
+
+void *memcpy(void *dest, const void *src, size_t n);
+
+void
+buggy_init(void *ptr, size_t size)
+{
+ const char *str = "Hello world!";
+ memcpy(ptr, &str, size);
+}
+
+void
+expose_bug(void *ptr, size_t size)
+{
+ const char *str;
+ memcpy(&str, ptr, size);
+ if (*str != 'H')
+ abort ();
+}
+
+int
+main()
+{
+ const char *ptr;
+ buggy_init(&ptr, sizeof(ptr));
+ expose_bug(&ptr, sizeof(ptr));
+ return 0;
+}
Index: ChangeLog
===================================================================
--- ChangeLog (revision 158752)
+++ ChangeLog (working copy)
@@ -1,3 +1,8 @@
+2010-04-26 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR tree-optimization/43904
+ * gcc.dg/tree-ssa/tailcall-6.c: New.
+
2010-04-26 Iain Sandoe <iain.sandoe@sandoe-acoustics.co.uk>
PR testsuite/35165