1 files changed, 46 insertions, 0 deletions
diff --git a/test/Transforms/LoadStoreVectorizer/X86/merge-tbaa.ll b/test/Transforms/LoadStoreVectorizer/X86/merge-tbaa.ll
new file mode 100644
index 00000000000..3c283dcb6e5
--- /dev/null
+++ b/test/Transforms/LoadStoreVectorizer/X86/merge-tbaa.ll
@@ -0,0 +1,46 @@
+; RUN: opt -mtriple=x86_64-unknown-linux-gnu -load-store-vectorizer -S < %s | \
+; RUN:     FileCheck %s
+;
+; The GPU Load & Store Vectorizer may merge differently-typed accesses into a
+; single instruction. This test checks that we merge TBAA tags for such
+; accesses correctly.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+; struct S {
+;   float f;
+;   int i;
+; };
+%struct.S = type { float, i32 }
+
+; float foo(S *p) {
+;   p->f -= 1;
+;   p->i -= 1;
+;   return p->f;
+; }
+define float @foo(%struct.S* %p) {
+entry:
+; CHECK-LABEL: foo
+; CHECK: load <2 x i32>, {{.*}}, !tbaa [[TAG_char:!.*]]
+; CHECK: store <2 x i32> {{.*}}, !tbaa [[TAG_char]]
+  %f = getelementptr inbounds %struct.S, %struct.S* %p, i64 0, i32 0
+  %0 = load float, float* %f, align 4, !tbaa !2
+  %sub = fadd float %0, -1.000000e+00
+  store float %sub, float* %f, align 4, !tbaa !2
+  %i = getelementptr inbounds %struct.S, %struct.S* %p, i64 0, i32 1
+  %1 = load i32, i32* %i, align 4, !tbaa !8
+  %sub1 = add nsw i32 %1, -1
+  store i32 %sub1, i32* %i, align 4, !tbaa !8
+  ret float %sub
+}
+
+!2 = !{!3, !4, i64 0}
+!3 = !{!"_ZTS1S", !4, i64 0, !7, i64 4}
+!4 = !{!"float", !5, i64 0}
+!5 = !{!"omnipotent char", !6, i64 0}
+!6 = !{!"Simple C++ TBAA"}
+!7 = !{!"int", !5, i64 0}
+!8 = !{!3, !7, i64 4}
+
+; CHECK-DAG: [[TYPE_char:!.*]] = !{!"omnipotent char", {{.*}}, i64 0}
+; CHECK-FAG: [[TAG_char]] = !{[[TYPE_char]], [[TYPE_char]], i64 0}