Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/Transforms/EarlyCSE/globalsaa-memoryssa.ll

@@ -0,0 +1,25 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -S -globals-aa -early-cse-memssa | FileCheck %s
+
+define i16 @f1() readonly {
+  ret i16 0
+}
+
+declare void @f2()
+
+; Check that EarlyCSE correctly handles function calls that don't have
+; a MemoryAccess.  In this case the calls to @f1 have no
+; MemoryAccesses since globals-aa determines that @f1 doesn't
+; read/write memory at all.
+
+define void @f3() {
+; CHECK-LABEL: @f3(
+; CHECK-NEXT:    [[CALL1:%.*]] = call i16 @f1()
+; CHECK-NEXT:    call void @f2()
+; CHECK-NEXT:    ret void
+;
+  %call1 = call i16 @f1()
+  call void @f2()
+  %call2 = call i16 @f1()
+  ret void
+}