1 files changed, 42 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/shift-simplify.ll b/test/Transforms/InstCombine/shift-simplify.ll
new file mode 100644
index 0000000..e5cc705
--- /dev/null
+++ b/test/Transforms/InstCombine/shift-simplify.ll
@@ -0,0 +1,42 @@
+; RUN: opt < %s -instcombine -S | \
+; RUN:    egrep {shl|lshr|ashr} | count 3
+
+define i32 @test0(i32 %A, i32 %B, i32 %C) {
+	%X = shl i32 %A, %C
+	%Y = shl i32 %B, %C
+	%Z = and i32 %X, %Y
+	ret i32 %Z
+}
+
+define i32 @test1(i32 %A, i32 %B, i32 %C) {
+	%X = lshr i32 %A, %C
+	%Y = lshr i32 %B, %C
+	%Z = or i32 %X, %Y
+	ret i32 %Z
+}
+
+define i32 @test2(i32 %A, i32 %B, i32 %C) {
+	%X = ashr i32 %A, %C
+	%Y = ashr i32 %B, %C
+	%Z = xor i32 %X, %Y
+	ret i32 %Z
+}
+
+define i1 @test3(i32 %X) {
+        %tmp1 = shl i32 %X, 7
+        %tmp2 = icmp slt i32 %tmp1, 0
+        ret i1 %tmp2
+}
+
+define i1 @test4(i32 %X) {
+        %tmp1 = lshr i32 %X, 7
+        %tmp2 = icmp slt i32 %tmp1, 0
+        ret i1 %tmp2
+}
+
+define i1 @test5(i32 %X) {
+        %tmp1 = ashr i32 %X, 7
+        %tmp2 = icmp slt i32 %tmp1, 0
+        ret i1 %tmp2
+}
+