obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 62 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/ipa/ipa-pta-13.c b/gcc/testsuite/gcc.dg/ipa/ipa-pta-13.c
new file mode 100644
index 000000000..1e04bfc21
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/ipa-pta-13.c
@@ -0,0 +1,62 @@
+/* { dg-do link } */
+/* { dg-options "-O2 -fipa-pta -fdump-ipa-pta-details -fdump-tree-fre" } */
+
+static int x, y;
+
+static __attribute__((noinline,noclone)) void
+local (int *p)
+{
+  *p = 1;
+}
+
+static __attribute__((noinline,noclone)) void
+local_address_taken (int *p)
+{
+  *p = 1;
+}
+
+void *anyfn_global;
+
+/* Even though not referenced in this TU we should have added constraints
+   for the initializer.  */
+/* { dg-final { scan-ipa-dump "ex = &local_address_taken" "pta" } } */
+void (*ex)(int *) = local_address_taken;
+
+extern void link_error (void);
+
+int main()
+{
+  void (*anyfn)(int *) = (void (*)(int *))(__SIZE_TYPE__)anyfn_global;
+  /* The following should cause local_address_taken to get &x
+     as argument, but not local.  We shouldn't get &x added to
+     arbitrary special sub-vars of local_address_taken though,
+     a missed optimization currently.
+     As local_address_taken escapes the translation unit its
+     argument points-to set needs to include ESCAPED and NONLOCAL.
+     We shouldn't get the functions sub-vars in the ESCAPED solution
+     though, another missed-optimization.  This also causes the functions
+     uses to be messed up even further.  */
+  /* ???  As we don't expand the ESCAPED solution we either get x printed here
+     or not based on the phase of the moon.  */
+  /* { dg-final { scan-ipa-dump "local_address_taken.arg0 = { ESCAPED NONLOCAL y x }" "pta" { xfail *-*-* } } } */
+  /* { dg-final { scan-ipa-dump "local_address_taken.clobber = { ESCAPED NONLOCAL y x }" "pta" { xfail *-*-* } } } */
+  /* { dg-final { scan-ipa-dump "local_address_taken.use = { }" "pta" { xfail *-*-* } } } */
+  /* ??? But make sure x really escaped.  */
+  /* { dg-final { scan-ipa-dump "ESCAPED = {\[^\n\}\]* x \[^\n\}\]*}" "pta" } } */
+  (*anyfn) (&x);
+  x = 0;
+  local (&y);
+  /* Thus we should be able to disambiguate x against the call to local
+     and CSE the stored value.  */
+  if (x != 0)
+    link_error ();
+  x = 1;
+  local_address_taken (&y);
+  /* As we are computing flow- and context-insensitive we may not
+     CSE the load of x here.  */
+  /* { dg-final { scan-tree-dump " = x;" "fre" } } */
+  return x;
+}
+
+/* { dg-final { cleanup-ipa-dump "pta" } } */
+/* { dg-final { cleanup-tree-dump "fre" } } */