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, 43 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr15784-1.c b/gcc/testsuite/gcc.dg/pr15784-1.c
new file mode 100644
index 000000000..77e398e1d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr15784-1.c
@@ -0,0 +1,43 @@
+/* { dg-do compile } */
+/* { dg-options "-fstrict-overflow -fdump-tree-gimple" } */
+/* Test for folding abs(x) where appropriate.  */
+#define abs(x) x > 0 ? x : -x
+extern double fabs (double);
+
+int a (int x) {
+	return (abs(x)) >= 0;
+}
+
+int b (int x) {
+	return (abs(x)) == 0;
+}
+
+int c (int x) {
+	return (abs(x)) != 0;
+}
+
+int d (int x) {
+	return 0 != (abs(x));
+}
+
+int e (int x) {
+	return 0 == (abs(x));
+}
+
+int f (int x) {
+	return 0 <= (abs(x));
+}
+
+int g (int x) {
+	return 0 > (abs(x));
+}
+
+int h (float x) {
+	return 0.0 > fabs(x);
+}
+
+int i (float x) {
+	return fabs(x) == -0.0;
+}
+/* { dg-final { scan-tree-dump-times "ABS_EXPR" 0 "gimple" } } */
+/* { dg-final { cleanup-tree-dump "gimple" } } */