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llvm-project/clang/test/CodeGen/tbaa-array.cpp

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[CodeGen] Fix generation of TBAA info for array-to-pointer conversions Resolves: Fatal error: Offset not zero at the point of scalar access. http://llvm.org/PR34992 Differential Revision: https://reviews.llvm.org/D39083 llvm-svn: 316211
2017-10-20 20:35:17 +08:00
// RUN: %clang_cc1 -triple x86_64-linux -O1 -disable-llvm-passes %s \
// RUN: -emit-llvm -o - | FileCheck %s
[CodeGen] Represent array members in new-format TBAA type descriptors Now that in the new TBAA format we allow access types to be of any object types, including aggregate ones, it becomes critical to specify types of all sub-objects such aggregates comprise as their members. In order to meet this requirement, this patch enables generation of field descriptors for members of array types. Differential Revision: https://reviews.llvm.org/D41399 llvm-svn: 321352
2017-12-22 17:57:24 +08:00
// RUN: %clang_cc1 -triple x86_64-linux -O1 -disable-llvm-passes %s \
// RUN: -new-struct-path-tbaa -emit-llvm -o - | \
// RUN: FileCheck -check-prefix=CHECK-NEW %s
[CodeGen] Fix generation of TBAA info for array-to-pointer conversions Resolves: Fatal error: Offset not zero at the point of scalar access. http://llvm.org/PR34992 Differential Revision: https://reviews.llvm.org/D39083 llvm-svn: 316211
2017-10-20 20:35:17 +08:00
//
// Check that we generate correct TBAA information for accesses to array
// elements.
struct A { int i; };
struct B { A a[1]; };
[CodeGen] Represent array members in new-format TBAA type descriptors Now that in the new TBAA format we allow access types to be of any object types, including aggregate ones, it becomes critical to specify types of all sub-objects such aggregates comprise as their members. In order to meet this requirement, this patch enables generation of field descriptors for members of array types. Differential Revision: https://reviews.llvm.org/D41399 llvm-svn: 321352
2017-12-22 17:57:24 +08:00
struct C { int i; int x[3]; };
[CodeGen] Fix generation of TBAA info for array-to-pointer conversions Resolves: Fatal error: Offset not zero at the point of scalar access. http://llvm.org/PR34992 Differential Revision: https://reviews.llvm.org/D39083 llvm-svn: 316211
2017-10-20 20:35:17 +08:00
int foo(B *b) {
// CHECK-LABEL: _Z3fooP1B
// CHECK: load i32, {{.*}}, !tbaa [[TAG_A_i:!.*]]
[CodeGen] Represent array members in new-format TBAA type descriptors Now that in the new TBAA format we allow access types to be of any object types, including aggregate ones, it becomes critical to specify types of all sub-objects such aggregates comprise as their members. In order to meet this requirement, this patch enables generation of field descriptors for members of array types. Differential Revision: https://reviews.llvm.org/D41399 llvm-svn: 321352
2017-12-22 17:57:24 +08:00
// CHECK-NEW-LABEL: _Z3fooP1B
// CHECK-NEW: load i32, {{.*}}, !tbaa [[TAG_A_i:!.*]]
[CodeGen] Fix generation of TBAA info for array-to-pointer conversions Resolves: Fatal error: Offset not zero at the point of scalar access. http://llvm.org/PR34992 Differential Revision: https://reviews.llvm.org/D39083 llvm-svn: 316211
2017-10-20 20:35:17 +08:00
return b->a->i;
}
[CodeGen] Represent array members in new-format TBAA type descriptors Now that in the new TBAA format we allow access types to be of any object types, including aggregate ones, it becomes critical to specify types of all sub-objects such aggregates comprise as their members. In order to meet this requirement, this patch enables generation of field descriptors for members of array types. Differential Revision: https://reviews.llvm.org/D41399 llvm-svn: 321352
2017-12-22 17:57:24 +08:00
// Check that members of array types are represented correctly.
int bar(C *c) {
// CHECK-NEW-LABEL: _Z3barP1C
// CHECK-NEW: load i32, {{.*}}, !tbaa [[TAG_C_i:!.*]]
return c->i;
}
int bar2(C *c) {
// CHECK-NEW-LABEL: _Z4bar2P1C
// CHECK-NEW: load i32, {{.*}}, !tbaa [[TAG_int:!.*]]
return c->x[2];
}
int bar3(C *c, int j) {
// CHECK-NEW-LABEL: _Z4bar3P1Ci
// CHECK-NEW: load i32, {{.*}}, !tbaa [[TAG_int:!.*]]
return c->x[j];
}
[CodeGen] Fix generation of TBAA info for array-to-pointer conversions Resolves: Fatal error: Offset not zero at the point of scalar access. http://llvm.org/PR34992 Differential Revision: https://reviews.llvm.org/D39083 llvm-svn: 316211
2017-10-20 20:35:17 +08:00
// CHECK-DAG: [[TAG_A_i]] = !{[[TYPE_A:!.*]], [[TYPE_int:!.*]], i64 0}
// CHECK-DAG: [[TYPE_A]] = !{!"_ZTS1A", !{{.*}}, i64 0}
// CHECK-DAG: [[TYPE_int]] = !{!"int", !{{.*}}, i64 0}
[CodeGen] Represent array members in new-format TBAA type descriptors Now that in the new TBAA format we allow access types to be of any object types, including aggregate ones, it becomes critical to specify types of all sub-objects such aggregates comprise as their members. In order to meet this requirement, this patch enables generation of field descriptors for members of array types. Differential Revision: https://reviews.llvm.org/D41399 llvm-svn: 321352
2017-12-22 17:57:24 +08:00
// CHECK-NEW-DAG: [[TYPE_char:!.*]] = !{{{.*}}, i64 1, !"omnipotent char"}
// CHECK-NEW-DAG: [[TYPE_int:!.*]] = !{[[TYPE_char]], i64 4, !"int"}
// CHECK-NEW-DAG: [[TAG_int]] = !{[[TYPE_int]], [[TYPE_int]], i64 0, i64 4}
// CHECK-NEW-DAG: [[TYPE_pointer:!.*]] = !{[[TYPE_char]], i64 8, !"any pointer"}
// CHECK-NEW-DAG: [[TYPE_A:!.*]] = !{[[TYPE_char]], i64 4, !"_ZTS1A", [[TYPE_int]], i64 0, i64 4}
// CHECK-NEW-DAG: [[TAG_A_i]] = !{[[TYPE_A]], [[TYPE_int]], i64 0, i64 4}
// CHECK-NEW-DAG: [[TYPE_C:!.*]] = !{[[TYPE_char]], i64 16, !"_ZTS1C", [[TYPE_int]], i64 0, i64 4, [[TYPE_int]], i64 4, i64 12}
// CHECK-NEW-DAG: [[TAG_C_i]] = !{[[TYPE_C:!.*]], [[TYPE_int:!.*]], i64 0, i64 4}