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7bfd5cb7be
This is a follow on from a similar LLVM commit: r253511. Note, this was reviewed (and more details are in) http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html These intrinsics currently have an explicit alignment argument which is required to be a constant integer. It represents the alignment of the source and dest, and so must be the minimum of those. This change allows source and dest to each have their own alignments by using the alignment attribute on their arguments. The alignment argument itself is removed. The only code change to clang is hidden in CGBuilder.h which now passes both dest and source alignment to IRBuilder, instead of taking the minimum of dest and source alignments. Reviewed by Hal Finkel. llvm-svn: 253512
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - -O1 %s | FileCheck %s
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//
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// Check that we generate !tbaa.struct metadata for struct copies.
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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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void copy(struct A *a, struct A *b) {
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*a = *b;
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}
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %{{.*}}, i8* align 4 %{{.*}}, i64 16, i1 false), !tbaa.struct [[TS:!.*]]
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struct B {
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char c1;
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struct A a;
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int ii;
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};
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void copy2(struct B *a, struct B *b) {
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*a = *b;
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}
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %{{.*}}, i8* align 4 %{{.*}}, i64 24, i1 false), !tbaa.struct [[TS2:!.*]]
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typedef _Complex int T2;
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typedef _Complex char T5;
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typedef _Complex int T7;
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typedef struct T4 { T5 field0; T7 field1; } T4;
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typedef union T1 { T2 field0; T4 field1; } T1;
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void copy3 (T1 *a, T1 *b) {
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*a = *b;
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}
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %{{.*}}, i8* align 4 %{{.*}}, i64 12, i1 false), !tbaa.struct [[TS3:!.*]]
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// Make sure that zero-length bitfield works.
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#define ATTR __attribute__ ((ms_struct))
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struct five {
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char a;
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int :0; /* ignored; prior field is not a bitfield. */
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char b;
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char c;
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} ATTR;
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void copy4(struct five *a, struct five *b) {
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*a = *b;
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}
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %{{.*}}, i8* align 1 %{{.*}}, i64 3, i1 false), !tbaa.struct [[TS4:!.*]]
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struct six {
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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(struct six *a, struct six *b) {
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*a = *b;
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}
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 %{{.*}}, i8* align 1 %{{.*}}, i64 6, i1 false), !tbaa.struct [[TS5:!.*]]
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// CHECK: [[TS]] = !{i64 0, i64 2, !{{.*}}, i64 4, i64 4, !{{.*}}, i64 8, i64 1, !{{.*}}, i64 12, i64 4, !{{.*}}}
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// CHECK: [[CHAR:!.*]] = !{!"omnipotent char", !{{.*}}}
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// CHECK: [[TAG_INT:!.*]] = !{[[INT:!.*]], [[INT]], i64 0}
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// CHECK: [[INT]] = !{!"int", [[CHAR]]
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// CHECK: [[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: [[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: [[TS3]] = !{i64 0, i64 8, !{{.*}}, i64 0, i64 2, !{{.*}}, i64 4, i64 8, !{{.*}}}
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// CHECK: [[TS4]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 1, i64 4, [[TAG_INT]], i64 1, i64 1, [[TAG_CHAR]], i64 2, i64 1, [[TAG_CHAR]]}
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// CHECK: [[TS5]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 4, i64 4, [[TAG_INT]], i64 4, i64 1, [[TAG_CHAR]], i64 5, i64 1, [[TAG_CHAR]]}
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