From e170c76ccdcf9b0343d2d5a2805010ff77b8b56e Mon Sep 17 00:00:00 2001
From: Duncan Sands <baldrick@free.fr>
Date: Fri, 24 Feb 2012 15:16:31 +0000
Subject: Teach GVN that x+y is the same as y+x and that x<y is the same as
 y>x.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151365 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/GVN/commute.ll | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 test/Transforms/GVN/commute.ll

(limited to 'test/Transforms/GVN')

diff --git a/test/Transforms/GVN/commute.ll b/test/Transforms/GVN/commute.ll
new file mode 100644
index 0000000000..cf4fb7f172
--- /dev/null
+++ b/test/Transforms/GVN/commute.ll
@@ -0,0 +1,23 @@
+; RUN: opt -gvn -S < %s | FileCheck %s
+
+declare void @use(i32, i32)
+
+define void @foo(i32 %x, i32 %y) {
+  ; CHECK: @foo
+  %add1 = add i32 %x, %y
+  %add2 = add i32 %y, %x
+  call void @use(i32 %add1, i32 %add2)
+  ; CHECK: @use(i32 %add1, i32 %add1)
+  ret void
+}
+
+declare void @vse(i1, i1)
+
+define void @bar(i32 %x, i32 %y) {
+  ; CHECK: @bar
+  %cmp1 = icmp ult i32 %x, %y
+  %cmp2 = icmp ugt i32 %y, %x
+  call void @vse(i1 %cmp1, i1 %cmp2)
+  ; CHECK: @vse(i1 %cmp1, i1 %cmp1)
+  ret void
+}
-- 
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