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49839f97d2
Reimplement bitfield access unit computation for SysV ABIs. Considers expense of unaligned and non-power-of-2 accesses.
229 lines
10 KiB
C++
229 lines
10 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - -O1 %s | \
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// RUN: FileCheck -check-prefixes=CHECK,CHECK-OLD %s
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// RUN: %clang_cc1 -triple x86_64-apple-darwin -new-struct-path-tbaa \
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// RUN: -emit-llvm -o - -O1 %s | \
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// RUN: FileCheck -check-prefixes=CHECK,CHECK-NEW %s
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//
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// Check that we generate TBAA metadata for struct copies correctly.
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struct A {
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short s;
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int i;
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char c;
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int j;
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};
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typedef A __attribute__((may_alias)) AA;
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void copy(A *a1, A *a2) {
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// CHECK-LABEL: _Z4copyP1AS0_
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, i64 16, i1 false)
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// CHECK-OLD-SAME: !tbaa.struct [[TS:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_A:![0-9]*]]
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*a1 = *a2;
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}
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struct B {
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char c;
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A a;
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int i;
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};
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void copy2(B *b1, B *b2) {
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// CHECK-LABEL: _Z5copy2P1BS0_
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(24) %{{.*}}, ptr noundef nonnull align 4 dereferenceable(24) %{{.*}}, i64 24, i1 false)
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// CHECK-OLD-SAME: !tbaa.struct [[TS2:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_B:![0-9]*]]
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*b1 = *b2;
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}
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struct S {
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_Complex char cc;
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_Complex int ci;
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};
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union U {
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_Complex int ci;
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S s;
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};
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void copy3(U *u1, U *u2) {
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// CHECK-LABEL: _Z5copy3P1US0_
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(12) %{{.*}}, ptr noundef nonnull align 4 dereferenceable(12) %{{.*}}, i64 12, i1 false)
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// CHECK-OLD-SAME: !tbaa.struct [[TS3:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_U:![0-9]*]]
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*u1 = *u2;
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}
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// Make sure that zero-length bitfield works.
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struct C {
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char a;
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int : 0; // Shall not be ignored; see r185018.
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char b;
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char c;
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} __attribute__((ms_struct));
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void copy4(C *c1, C *c2) {
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// CHECK-LABEL: _Z5copy4P1CS0_
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(3) {{.*}}, ptr noundef nonnull align 1 dereferenceable(3) {{.*}}, i64 3, i1 false)
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// CHECK-OLD-SAME: !tbaa.struct [[TS4:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_C:![0-9]*]]
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*c1 = *c2;
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}
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struct D {
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char a;
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int : 0;
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char b;
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char c;
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};
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void copy5(D *d1, D *d2) {
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// CHECK-LABEL: _Z5copy5P1DS0_
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(6) {{.*}}, ptr noundef nonnull align 1 dereferenceable(6) {{.*}}, i64 6, i1 false)
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// CHECK-OLD-SAME: !tbaa.struct [[TS5:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_D:![0-9]*]]
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*d1 = *d2;
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}
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void copy6(AA *a1, A *a2) {
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// CHECK-LABEL: _Z5copy6P1AS0_
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, i64 16, i1 false)
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// CHECK-OLD-SAME: !tbaa.struct [[TS]]
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// CHECK-NEW-SAME: !tbaa [[TAG_char:![0-9]*]]
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*a1 = *a2;
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}
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void copy7(A *a1, AA *a2) {
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// CHECK-LABEL: _Z5copy7P1AS0_
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// CHECK: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, i64 16, i1 false)
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// CHECK-OLD-SAME: !tbaa.struct [[TS]]
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// CHECK-NEW-SAME: !tbaa [[TAG_char]]
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*a1 = *a2;
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}
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struct NamedBitfields {
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signed f0 : 9;
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unsigned f1 : 2;
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char f2;
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double f3;
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};
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void copy8(NamedBitfields *a1, NamedBitfields *a2) {
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// CHECK-LABEL: _Z5copy8P14NamedBitfieldsS0_
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// CHECK: 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),
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// CHECK-OLD-SAME: !tbaa.struct [[TS6:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_NamedBitfields:!.+]], !tbaa.struct
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*a1 = *a2;
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}
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struct NamedBitfields2 {
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char a, b, c;
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signed f0 : 3;
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unsigned f1 : 4;
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char f2 : 7;
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double f3;
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unsigned f4 : 4;
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};
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void copy9(NamedBitfields2 *a1, NamedBitfields2 *a2) {
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// CHECK-LABEL: _Z5copy9P15NamedBitfields2S0_
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// CHECK: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %a1, ptr noundef nonnull align 8 dereferenceable(24) %a2, i64 24, i1 false),
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// CHECK-OLD-SAME: !tbaa.struct [[TS7:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_NamedBitfields2:!.+]], !tbaa.struct
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*a1 = *a2;
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}
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// Test with unnamed bitfield at the start and in between named ones..
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struct NamedBitfields3 {
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unsigned : 11;
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signed f0 : 9;
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char : 2;
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int f1 : 2;
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double f2;
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};
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void copy10(NamedBitfields3 *a1, NamedBitfields3 *a2) {
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// CHECK-LABEL: _Z6copy10P15NamedBitfields3S0_
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// CHECK: 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),
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// CHECK-OLD-SAME: !tbaa.struct [[TS8:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_NamedBitfields3:!.+]], !tbaa.struct
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*a1 = *a2;
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}
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union U2 {
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double d;
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float f;
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};
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struct UnionMember1 {
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U2 u;
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int p;
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};
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void copy11(UnionMember1 *a1, UnionMember1 *a2) {
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// CHECK-LABEL: _Z6copy11P12UnionMember1S0_
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// CHECK: 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),
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// CHECK-OLD-SAME: !tbaa.struct [[TS9:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_UnionMember1:!.+]], !tbaa.struct
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*a1 = *a2;
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}
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struct UnionMember2 {
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int p;
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U2 u;
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};
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void copy12(UnionMember2 *a1, UnionMember2 *a2) {
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// CHECK-LABEL: _Z6copy12P12UnionMember2S0_
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// CHECK: 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),
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// CHECK-OLD-SAME: !tbaa.struct [[TS10:!.*]]
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// CHECK-NEW-SAME: !tbaa [[TAG_UnionMember2:!.+]], !tbaa.struct
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*a1 = *a2;
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}
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// CHECK-OLD: [[TS]] = !{i64 0, i64 2, !{{.*}}, i64 4, i64 4, !{{.*}}, i64 8, i64 1, !{{.*}}, i64 12, i64 4, !{{.*}}}
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// CHECK-OLD: [[CHAR:!.*]] = !{!"omnipotent char", !{{.*}}}
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// CHECK-OLD: [[TAG_INT:!.*]] = !{[[INT:!.*]], [[INT]], i64 0}
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// CHECK-OLD: [[INT]] = !{!"int", [[CHAR]]
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// CHECK-OLD: [[TAG_CHAR:!.*]] = !{[[CHAR]], [[CHAR]], i64 0}
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// (offset, size) = (0,1) char; (4,2) short; (8,4) int; (12,1) char; (16,4) int; (20,4) int
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// CHECK-OLD: [[TS2]] = !{i64 0, i64 1, !{{.*}}, i64 4, i64 2, !{{.*}}, i64 8, i64 4, !{{.*}}, i64 12, i64 1, !{{.*}}, i64 16, i64 4, {{.*}}, i64 20, i64 4, {{.*}}}
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// (offset, size) = (0,8) char; (0,2) char; (4,8) char
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// CHECK-OLD: [[TS3]] = !{i64 0, i64 12, [[TAG_CHAR]]}
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// CHECK-OLD: [[TS4]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 1, i64 1, [[TAG_CHAR]], i64 2, i64 1, [[TAG_CHAR]]}
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// CHECK-OLD: [[TS5]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 4, i64 1, [[TAG_CHAR]], i64 5, i64 1, [[TAG_CHAR]]}
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// CHECK-OLD: [[TS6]] = !{i64 0, i64 2, [[TAG_CHAR]], i64 2, i64 1, [[TAG_CHAR]], i64 8, i64 8, [[TAG_DOUBLE:!.+]]}
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// CHECK-OLD: [[TAG_DOUBLE]] = !{[[DOUBLE:!.+]], [[DOUBLE]], i64 0}
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// CHECK-OLD [[DOUBLE]] = !{!"double", [[CHAR]], i64 0}
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// CHECK-OLD: [[TS7]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 1, i64 1, [[TAG_CHAR]], i64 2, i64 1, [[TAG_CHAR]], i64 3, i64 2, [[TAG_CHAR]], i64 8, i64 8, [[TAG_DOUBLE]], i64 16, i64 1, [[TAG_CHAR]]}
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// CHECK-OLD: [[TS8]] = !{i64 0, i64 4, [[TAG_CHAR]], i64 8, i64 8, [[TAG_DOUBLE]]}
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// CHECK-OLD: [[TS9]] = !{i64 0, i64 8, [[TAG_CHAR]], i64 8, i64 4, [[TAG_INT]]}
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// CHECK-OLD: [[TS10]] = !{i64 0, i64 4, [[TAG_INT]], i64 8, i64 8, [[TAG_CHAR]]}
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// CHECK-NEW-DAG: [[TYPE_char:!.*]] = !{{{.*}}, i64 1, !"omnipotent char"}
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// CHECK-NEW-DAG: [[TAG_char]] = !{[[TYPE_char]], [[TYPE_char]], i64 0, i64 0}
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// CHECK-NEW-DAG: [[TYPE_short:!.*]] = !{[[TYPE_char]], i64 2, !"short"}
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// CHECK-NEW-DAG: [[TYPE_int:!.*]] = !{[[TYPE_char]], i64 4, !"int"}
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// CHECK-NEW-DAG: [[TYPE_A:!.*]] = !{[[TYPE_char]], i64 16, !"_ZTS1A", [[TYPE_short]], i64 0, i64 2, [[TYPE_int]], i64 4, i64 4, [[TYPE_char]], i64 8, i64 1, [[TYPE_int]], i64 12, i64 4}
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// CHECK-NEW-DAG: [[TAG_A]] = !{[[TYPE_A]], [[TYPE_A]], i64 0, i64 16}
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// CHECK-NEW-DAG: [[TYPE_B:!.*]] = !{[[TYPE_char]], i64 24, !"_ZTS1B", [[TYPE_char]], i64 0, i64 1, [[TYPE_A]], i64 4, i64 16, [[TYPE_int]], i64 20, i64 4}
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// CHECK-NEW-DAG: [[TAG_B]] = !{[[TYPE_B]], [[TYPE_B]], i64 0, i64 24}
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// CHECK-NEW-DAG: [[TAG_U]] = !{[[TYPE_char]], [[TYPE_char]], i64 0, i64 12}
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// CHECK-NEW-DAG: [[TYPE_C:!.*]] = !{[[TYPE_char]], i64 3, !"_ZTS1C", [[TYPE_char]], i64 0, i64 1, [[TYPE_char]], i64 1, i64 1, [[TYPE_char]], i64 2, i64 1}
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// CHECK-NEW-DAG: [[TAG_C]] = !{[[TYPE_C]], [[TYPE_C]], i64 0, i64 3}
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// CHECK-NEW-DAG: [[TYPE_D:!.*]] = !{[[TYPE_char]], i64 6, !"_ZTS1D", [[TYPE_char]], i64 0, i64 1, [[TYPE_char]], i64 4, i64 1, [[TYPE_char]], i64 5, i64 1}
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// CHECK-NEW-DAG: [[TAG_D]] = !{[[TYPE_D]], [[TYPE_D]], i64 0, i64 6}
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// CHECK-NEW-DAG: [[TAG_NamedBitfields]] = !{[[TYPE_NamedBitfields:!.+]], [[TYPE_NamedBitfields]], i64 0, i64 16}
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// CHECK-NEW-DAG: [[TYPE_NamedBitfields]] = !{[[TYPE_char]], i64 16, !"_ZTS14NamedBitfields", [[TYPE_int]], i64 0, i64 4, [[TYPE_int]], i64 1, i64 4, [[TYPE_char]], i64 2, i64 1, [[TYPE_double:!.+]], i64 8, i64 8}
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// CHECK-NEW-DAG: [[TYPE_double]] = !{[[TYPE_char]], i64 8, !"double"}
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// CHECK-NEW-DAG: [[TAG_NamedBitfields2]] = !{[[TYPE_NamedBitfields2:!.+]], [[TYPE_NamedBitfields2]], i64 0, i64 24}
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// CHECK-NEW-DAG: [[TYPE_NamedBitfields2]] = !{[[TYPE_char]], i64 24, !"_ZTS15NamedBitfields2", [[TYPE_char]], i64 0, i64 1, [[TYPE_char]], i64 1, i64 1, [[TYPE_char]], i64 2, i64 1, [[TYPE_int]], i64 3, i64 4, [[TYPE_int]], i64 3, i64 4, [[TYPE_char]], i64 4, i64 1, [[TYPE_double]], i64 8, i64 8, [[TYPE_int]], i64 16, i64 4}
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// CHECK-NEW-DAG: [[TAG_NamedBitfields3]] = !{[[TYPE_NamedBitfields3:!.+]], [[TYPE_NamedBitfields3]], i64 0, i64 16}
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// CHECK-NEW-DAG: [[TYPE_NamedBitfields3]] = !{[[TYPE_char]], i64 16, !"_ZTS15NamedBitfields3", [[TYPE_int]], i64 1, i64 4, [[TYPE_int]], i64 2, i64 4, [[TYPE_double]], i64 8, i64 8}
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// CHECK-NEW-DAG: [[TAG_UnionMember1]] = !{[[TYPE_UnionMember1:!.+]], [[TYPE_UnionMember1]], i64 0, i64 16}
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// CHECK-NEW-DAG: [[TYPE_UnionMember1]] = !{[[TYPE_char]], i64 16, !"_ZTS12UnionMember1", [[TYPE_char]], i64 0, i64 8, [[TYPE_int]], i64 8, i64 4}
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// CHECK-NEW-DAG: [[TAG_UnionMember2]] = !{[[TYPE_UnionMember2:!.+]], [[TYPE_UnionMember2]], i64 0, i64 16}
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// CHECK-NEW-DAG: [[TYPE_UnionMember2]] = !{[[TYPE_char]], i64 16, !"_ZTS12UnionMember2", [[TYPE_int]], i64 0, i64 4, [[TYPE_char]], i64 8, i64 8}
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