Implement PR5795 by merging duplicated return blocks. This could go further
by merging all returns in a function into a single one, but simplifycfg
currently likes to duplicate the return (an unfortunate choice!)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91890 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/SimplifyCFG/basictest.ll b/test/Transforms/SimplifyCFG/basictest.ll
index d0e4754..83a9fa7 100644
--- a/test/Transforms/SimplifyCFG/basictest.ll
+++ b/test/Transforms/SimplifyCFG/basictest.ll
@@ -38,3 +38,22 @@
@test4g = global i8* blockaddress(@test4, %return)
+; PR5795
+define void @test5(i32 %A) {
+ switch i32 %A, label %return [
+ i32 2, label %bb
+ i32 10, label %bb1
+ ]
+
+bb: ; preds = %entry
+ ret void
+
+bb1: ; preds = %entry
+ ret void
+
+return: ; preds = %entry
+ ret void
+; CHECK: @test5
+; CHECK-NEXT: bb:
+; CHECK-NEXT: ret void
+}