[NFC] Precommit test showing SROA loses `!tbaa.struct` metadata

This issue impacts llvm.org/pr42022

diff --git a/llvm/test/Transforms/SROA/tbaa-struct.ll b/llvm/test/Transforms/SROA/tbaa-struct.ll
new file mode 100644 (file)
index 0000000..d59e67a
--- /dev/null
+++ b/llvm/test/Transforms/SROA/tbaa-struct.ll
@@ -0,0 +1,32 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -sroa %s | FileCheck %s
+
+; SROA should keep `!tbaa.struct` metadata
+
+%vector = type { float, float }
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* writeonly, i8* readonly, i64, i1 immarg)
+declare <2 x float> @foo(%vector* %0)
+
+define void @bar(%vector* %y2) {
+; CHECK-LABEL: @bar(
+; CHECK-NEXT:    [[X14:%.*]] = call <2 x float> @foo(%vector* [[Y2:%.*]])
+; CHECK-NEXT:    [[X7_SROA_0_0_X18_SROA_CAST:%.*]] = bitcast %vector* [[Y2]] to <2 x float>*
+; CHECK-NEXT:    store <2 x float> [[X14]], <2 x float>* [[X7_SROA_0_0_X18_SROA_CAST]], align 4
+; CHECK-NEXT:    ret void
+;
+  %x7 = alloca %vector
+  %x14 = call <2 x float> @foo(%vector* %y2)
+  %x15 = bitcast %vector* %x7 to <2 x float>*
+  store <2 x float> %x14, <2 x float>* %x15
+  %x19 = bitcast %vector* %x7 to i8*
+  %x18 = bitcast %vector* %y2 to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %x18, i8* align 4 %x19, i64 8, i1 false), !tbaa.struct !10
+  ret void
+}
+
+!4 = !{!"omnipotent char", !5, i64 0}
+!5 = !{!"Simple C++ TBAA"}
+!7 = !{!"vector", !8, i64 0, !8, i64 4}
+!8 = !{!"float", !4, i64 0}
+!10 = !{i64 0, i64 4, !11, i64 4, i64 4, !11}
+!11 = !{!8, !8, i64 0}