llvm-project/clang/test/CodeGenCXX/ubsan-bitfield-conversion.cpp
Michael Halkenhäuser 3009228a09
[clang][UBSan] Remove rigid metadata checks for ubsan-bitfield-conversion (#88116)
Follow-up to discussion: https://github.com/llvm/llvm-project/pull/87761

As discussed after landing the original PR:
Since fails could happen w.r.t. checking `!6`, these checks should be
removed.
2024-04-09 18:18:21 +02:00

94 lines
4.1 KiB
C++

// RUN: %clang -x c++ -fsanitize=implicit-bitfield-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,CHECK-BITFIELD-CONVERSION
// RUN: %clang -x c++ -fsanitize=implicit-integer-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK
// RUN: %clang -x c++ -fsanitize=implicit-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,CHECK-BITFIELD-CONVERSION
struct S {
int a:3;
char b:2;
};
class C : public S {
public:
short c:3;
};
S s;
C c;
// CHECK-LABEL: define{{.*}} void @{{.*foo1.*}}
void foo1(int x) {
s.a = x;
// CHECK: store i8 %{{.*}}
// CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
// CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
// CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
c.a = x;
// CHECK: store i8 %{{.*}}
// CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
// CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
// CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
// CHECK-BITFIELD-CONVERSION: [[CONT]]:
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define{{.*}} void @{{.*foo2.*}}
void foo2(int x) {
s.b = x;
// CHECK: store i8 %{{.*}}
// CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 6
// CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 6
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
c.b = x;
// CHECK: store i8 %{{.*}}
// CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 6
// CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 6
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
// CHECK-BITFIELD-CONVERSION: [[CONT]]:
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define{{.*}} void @{{.*foo3.*}}
void foo3() {
s.a++;
// CHECK: store i8 %{{.*}}
// CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
// CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
// CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
c.a++;
// CHECK: store i8 %{{.*}}
// CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
// CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
// CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
// CHECK-BITFIELD-CONVERSION: [[CONT]]:
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define{{.*}} void @{{.*foo4.*}}
void foo4(int x) {
s.a += x;
// CHECK: store i8 %{{.*}}
// CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
// CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
// CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
c.a += x;
// CHECK: store i8 %{{.*}}
// CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
// CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
// CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
// CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
// CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize
// CHECK-BITFIELD-CONVERSION: [[CONT]]:
// CHECK-NEXT: ret void
}