2004-08-22 Andrew Pinski <apinski@apple.com>

       PR c/15262
       * c-typeck.c (build_unary_op): Use &a.b if the foldded lowered
       expression is not constant.
       (c_finish_return): Do not go through INDIRECT_REF when looking
       for the inner expression of an ADDR_EXPR for warning about.

2004-08-22  Andrew Pinski  <apinski@apple.com>

       * g++.dg/opt/pr14029.C: New test.
       * gcc.c-torture/execute/pr15262.c: New test.
2004-08-22  Andrew Pinski  <apinski@apple.com>

       PR c++/14029
       * typeck.c (build_unary_op): Use &a.b if the foldded lowered
       expression is not constant.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@86396 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 48 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr15262.c b/gcc/testsuite/gcc.c-torture/execute/pr15262.c
new file mode 100644
index 00000000000..2110f33a04a
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr15262.c
@@ -0,0 +1,48 @@
+/* We used to mis-compile this testcase as we did not know that
+   &a+offsetof(b,a) was the same as &a.b */
+struct A
+{
+  int t;
+  int i;
+};
+
+void
+bar (float *p)
+{
+  *p = 5.2;
+}
+
+int
+foo(struct A *locp, int i, int str)
+{
+  float f, g, *p;
+  int T355;
+  int *T356;
+  /* Currently, the alias analyzer has limited support for handling
+     aliases of structure fields when no other variables are aliased.
+     Introduce additional aliases to confuse it.  */
+  p =  i ? &g : &f;
+  bar (p);
+  if (*p > 0.0)
+    str = 1;
+
+  T355 = locp->i;
+  T356 = &locp->i;
+  *T356 = str;
+  T355 = locp->i;
+
+  return T355;
+}
+
+main ()
+{
+  struct A loc;
+  int str;
+
+  loc.i = 2;
+  str = foo (&loc, 10, 3);
+  if (str!=1)
+    abort ();
+  return 0;
+}
+