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, 56 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/cdce2.c b/gcc/testsuite/gcc.dg/cdce2.c
new file mode 100644
index 000000000..eebebaa23
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cdce2.c
@@ -0,0 +1,56 @@
+/* { dg-do  run  } */
+/* { dg-skip-if "doubles are floats" { "avr-*-*" } { "*" } { "" } } */
+/* { dg-options "-O2 -fmath-errno -fdump-tree-cdce-details  -lm" } */
+/* { dg-options "-O2 -fmath-errno -fdump-tree-cdce-details" { target *-*-netware* } } */
+/* { dg-final { scan-tree-dump  "cdce2.c:17: note: function call is shrink-wrapped into error conditions\." "cdce" } }*/
+/* { dg-final { cleanup-tree-dump "cdce" } } */
+ 
+#include <stdlib.h>
+#include <math.h>
+#include <errno.h>
+int total_err_count = 0;
+double foo_opt (double y) __attribute__((noinline));
+double foo_opt (double y)
+{
+  double yy = 0;
+  errno = 0;
+  yy = log (y);
+  return 0;
+}
+
+double foo (double y) __attribute__((noinline));
+double foo (double y)
+{
+  double yy = 0;
+  errno = 0;
+  yy = log (y);
+  return yy;
+}
+
+int test (double (*fp) (double y))
+{
+  int i,x;
+  for (i = -100; i < 100; i++)
+    {  
+      fp (i);
+      if (errno)
+        total_err_count ++;
+    }
+
+  return total_err_count;
+}
+
+int main ()
+{
+  int en1, en2;
+  double yy;
+  total_err_count = 0;
+  en1 = test (foo_opt);
+  total_err_count = 0;
+  en2 = test (foo);
+
+  if (en1 != en2)
+    abort();
+
+  return 0;
+}