1 files changed, 38 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/switch-masked-bits.ll b/test/Transforms/SimplifyCFG/switch-masked-bits.ll
new file mode 100644
index 0000000..fc83ec2
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/switch-masked-bits.ll
@@ -0,0 +1,38 @@
+; RUN: opt -S -simplifycfg < %s | FileCheck %s
+
+define i32 @test1(i32 %x) nounwind {
+  %i = shl i32 %x, 1
+  switch i32 %i, label %a [
+    i32 21, label %b
+    i32 24, label %c
+  ]
+
+a:
+  ret i32 0
+b:
+  ret i32 3
+c:
+  ret i32 5
+; CHECK: @test1
+; CHECK: %cond = icmp eq i32 %i, 24
+; CHECK: %merge = select i1 %cond, i32 5, i32 0
+; CHECK: ret i32 %merge
+}
+
+
+define i32 @test2(i32 %x) nounwind {
+  %i = shl i32 %x, 1
+  switch i32 %i, label %a [
+    i32 21, label %b
+    i32 23, label %c
+  ]
+
+a:
+  ret i32 0
+b:
+  ret i32 3
+c:
+  ret i32 5
+; CHECK: @test2
+; CHECK: ret i32 0
+}