[PhaseOrdering] Add test for missing vectorization with NewPM.

diff --git a/llvm/test/Transforms/PhaseOrdering/AArch64/globals-aa-required-for-vectorization.ll b/llvm/test/Transforms/PhaseOrdering/AArch64/globals-aa-required-for-vectorization.ll
new file mode 100644 (file)
index 0000000..f771399
--- /dev/null
+++ b/llvm/test/Transforms/PhaseOrdering/AArch64/globals-aa-required-for-vectorization.ll
@@ -0,0 +1,47 @@
+; RUN: opt -passes='lto<O3>' -S %s | FileCheck %s
+; RUN: opt -std-link-opts -enable-new-pm=false -S %s | FileCheck --check-prefix=LEGACY %s
+
+target triple = "arm64e-apple-darwin"
+
+@A = external unnamed_addr global i8**, align 8
+@B = external unnamed_addr global i8**, align 8
+@C = internal unnamed_addr global i32 0, align 4
+@D = external unnamed_addr global i32, align 4
+
+; CHECK-LABEL: @fn
+; CHECK-NOT: vector.body:
+;
+; LEGACY-LABEL: @fn
+; LEGACY: vector.body:
+;
+define void @fn() {
+entry:
+  %v.D = load i32, i32* @D, align 4
+  store i32 %v.D, i32* @C, align 4
+  call void @clobber()
+
+  %v.B = load i8**, i8*** @B, align 8
+  %v.A = load i8**, i8*** @A, align 8
+  %gep.1 = getelementptr inbounds i8*, i8** %v.A, i64 0
+  %v.gep.1 = load i8*, i8** %gep.1, align 8
+  %gep.2 = getelementptr inbounds i8*, i8** %v.B, i64 0
+  %v.gep.2 = load i8*, i8** %gep.2, align 8
+  %cmp = icmp eq i8* %v.gep.2, null
+  br i1 %cmp, label %exit, label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
+  %gep.3 = getelementptr inbounds i8, i8* %v.gep.2, i32 %iv
+  %v.gep.3 = load i8, i8* %gep.3, align 1
+  %gep.4 = getelementptr inbounds i8, i8* %v.gep.1, i32 %iv
+  store i8 %v.gep.3, i8* %gep.4, align 1
+  %iv.next = add nuw nsw i32 %iv, 1
+  %v.C = load i32, i32* @C, align 4
+  %exit.cond = icmp sgt i32 %iv, %v.C
+  br i1 %exit.cond, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+declare void @clobber()