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[TBAA] Test for tbaa.struct metadata with bitfields in big endian layout #87617

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Apr 4, 2024
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[TBAA] Test for tbaa.struct metadata with bitfields in big endian layout #87617

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ae5286a
Add test for tbaa.struct metadata for bitfields in big endian layout
juliannagele Apr 4, 2024
5c18f53
Merge branch 'main' into tbaa-struct-bitfields-big-endian-test
fhahn Apr 4, 2024
573b714
fixup! Add test for tbaa.struct metadata for bitfields in big endian …
juliannagele Apr 4, 2024
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37 changes: 37 additions & 0 deletions clang/test/CodeGen/tbaa-struct-be.cpp
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Original file line number Diff line number Diff line change
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// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 4
// RUN: %clang_cc1 -triple aarch64_be-apple-darwin -emit-llvm -o - -O1 %s | \
// RUN: FileCheck -check-prefixes=CHECK %s
//
// Check TBAA metadata for struct copies for big endian architecture.
// FIXME: The tbaa.struct metadata generated below is invalid: it
// contains overlapping regions.

struct NamedBitfields {
int f1 : 8;
int f2 : 8;
unsigned f3 : 1;
unsigned f4 : 15;
int f5;
double f6;
};

// CHECK-LABEL: define dso_local void @_Z4copyP14NamedBitfieldsS0_(
// CHECK-SAME: ptr nocapture noundef writeonly [[A1:%.*]], ptr nocapture noundef readonly [[A2:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
// CHECK-NEXT: entry:
// CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) [[A1]], ptr noundef nonnull align 8 dereferenceable(16) [[A2]], i64 16, i1 false), !tbaa.struct [[TBAA_STRUCT2:![0-9]+]]
// CHECK-NEXT: ret void
//
void copy(NamedBitfields *a1, NamedBitfields *a2) {
*a1 = *a2;
}

//.
// CHECK: [[TBAA_STRUCT2]] = !{i64 2, i64 4, [[META3:![0-9]+]], i64 4, i64 4, [[META6:![0-9]+]], i64 8, i64 8, [[META8:![0-9]+]]}
// CHECK: [[META3]] = !{[[META4:![0-9]+]], [[META4]], i64 0}
// CHECK: [[META4]] = !{!"omnipotent char", [[META5:![0-9]+]], i64 0}
// CHECK: [[META5]] = !{!"Simple C++ TBAA"}
// CHECK: [[META6]] = !{[[META7:![0-9]+]], [[META7]], i64 0}
// CHECK: [[META7]] = !{!"int", [[META4]], i64 0}
// CHECK: [[META8]] = !{[[META9:![0-9]+]], [[META9]], i64 0}
// CHECK: [[META9]] = !{!"double", [[META4]], i64 0}
//.
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