From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; 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.
---
 gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-5.c | 33 +++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-5.c

(limited to 'gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-5.c')

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-5.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-5.c
new file mode 100644
index 000000000..537a5e57b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-5.c
@@ -0,0 +1,33 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+int x; 
+ 
+int 
+f1 (int i, int j, int k) 
+{ 
+  int *p = k ? &i : &j; 
+  i = 3;
+  *p = 5; 
+  x = j; 
+} 
+
+/* The assignment "i = 3" is partialy dead.  Our DSE pass doesn't handle
+   detection of partially dead assignments.
+
+   There's two outputs which would indicate that the optimization was
+   performed.
+
+   If we used block copying to detect and eliminate the partially dead
+   store, then we should see an assignment "i = 5" somewhere in the
+   dump file.
+
+   Another approach would be to redirect the path from the true arm
+   of the first conditional so that it reaches the statement *p = 5
+   rather than i = 3.  */
+
+/* { dg-final { scan-tree-dump-times "i = 5" 1 "optimized" { xfail *-*-* }} } */
+/* { dg-final { scan-tree-dump-times "<L.*>:;\[\n\t \]*\\*p = 5" 1 "optimized" { xfail *-*-*}} } */
+
+/* { dg-final { cleanup-tree-dump "optimized" } } */
+
-- 
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