Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/Transforms/SimplifyCFG/PR9946.ll

@@ -0,0 +1,18 @@
+; RUN: opt -simplifycfg -disable-output < %s
+
+@foo = external constant i32
+
+define i32 @f() {
+entry:
+  br i1 icmp eq (i64 and (i64 ptrtoint (i32* @foo to i64), i64 15), i64 0), label %if.end, label %if.then
+
+if.then:                                          ; preds = %entry
+  br label %return
+
+if.end:                                           ; preds = %entry
+  br label %return
+
+return:                                           ; preds = %if.end, %if.then
+  %storemerge = phi i32 [ 1, %if.end ], [ 0, %if.then ]
+  ret i32 %storemerge
+}