From 95d5c34d3e18ff0ec1e5aa0570ee1286cb2fb7ec Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Tue, 12 Jun 2007 00:49:33 +0000
Subject: [PATCH] Add a GVN-PRE basic regression test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37549 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/GVNPRE/basic.ll | 38 +++++++++++++++++++++++++++++++++
 test/Transforms/GVNPRE/dg.exp   |  3 +++
 2 files changed, 41 insertions(+)
 create mode 100644 test/Transforms/GVNPRE/basic.ll
 create mode 100644 test/Transforms/GVNPRE/dg.exp

diff --git a/test/Transforms/GVNPRE/basic.ll b/test/Transforms/GVNPRE/basic.ll
new file mode 100644
index 00000000000..e03231bb834
--- /dev/null
+++ b/test/Transforms/GVNPRE/basic.ll
@@ -0,0 +1,38 @@
+; RUN: llvm-as | opt -gvnpre | llvm-dis | not grep {%t3 =}
+; RUN: llvm-as | opt -gvnpre | llvm-dis | not grep {%t9 =}
+
+define i32 @main() {
+block1:
+	%t1 = bitcast i32 0 to i32		; <i32> [#uses=5]
+	br label %block2
+
+block2:		; preds = %block6, %block1
+	%t2 = phi i32 [ %t1, %block1 ], [ %t3, %block6 ]		; <i32> [#uses=3]
+	%t3 = add i32 %t2, 1		; <i32> [#uses=5]
+	br i1 false, label %block3, label %block7
+
+block3:		; preds = %block2
+	br i1 true, label %block4, label %block5
+
+block4:		; preds = %block3
+	%t4 = add i32 %t2, %t3		; <i32> [#uses=1]
+	%t5 = bitcast i32 %t4 to i32		; <i32> [#uses=1]
+	%t6 = add i32 %t1, %t5		; <i32> [#uses=0]
+	br label %block6
+
+block5:		; preds = %block3
+	%t7 = add i32 %t3, 1		; <i32> [#uses=1]
+	br label %block6
+
+block6:		; preds = %block5, %block4
+	%t8 = phi i32 [ %t1, %block4 ], [ %t7, %block5 ]		; <i32> [#uses=1]
+	%t9 = add i32 %t2, %t3		; <i32> [#uses=2]
+	%t10 = add i32 %t9, %t8		; <i32> [#uses=0]
+	%t11 = bitcast i32 12 to i32		; <i32> [#uses=1]
+	%t12 = add i32 %t9, %t11		; <i32> [#uses=1]
+	%t13 = add i32 %t12, %t3		; <i32> [#uses=0]
+	br label %block2
+
+block7:		; preds = %block2
+	ret i32 %t1
+}
diff --git a/test/Transforms/GVNPRE/dg.exp b/test/Transforms/GVNPRE/dg.exp
new file mode 100644
index 00000000000..879685ca879
--- /dev/null
+++ b/test/Transforms/GVNPRE/dg.exp
@@ -0,0 +1,3 @@
+load_lib llvm.exp
+
+RunLLVMTests [lsort [glob -nocomplain $srcdir/$subdir/*.{ll,llx,c,cpp,tr}]]
-- 
2.34.1