Pre-commit test cases

Author: dianqk

llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch-pred-removed.ll

@@ -0,0 +1,20 @@
+; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>),print<memoryssa>' -verify-memoryssa -disable-output -S < %s 2>&1 | FileCheck %s
+
+; CHECK: preds = %bb2{{$}}
+; CHECK-NEXT: MemoryDef
+; CHECK-NEXT: call i32 @bar()
+
+define i32 @foo(i1 %arg, ptr %arg1) {
+bb:
+  br label %bb2
+
+bb2:                                              ; preds = %bb2, %bb
+  %i = select i1 %arg, ptr %arg1, ptr @bar
+  %i3 = call i32 %i()
+  br i1 %arg, label %bb2, label %bb4
+
+bb4:                                              ; preds = %bb2
+  ret i32 %i3
+}
+
+declare i32 @bar() nounwind willreturn memory(none)