diff options
Diffstat (limited to 'test/CodeGen/catch-undef-behavior.c')
| -rw-r--r-- | test/CodeGen/catch-undef-behavior.c | 241 |
1 files changed, 236 insertions, 5 deletions
diff --git a/test/CodeGen/catch-undef-behavior.c b/test/CodeGen/catch-undef-behavior.c index ee0b6586dd84..4198b62ea56c 100644 --- a/test/CodeGen/catch-undef-behavior.c +++ b/test/CodeGen/catch-undef-behavior.c @@ -1,17 +1,248 @@ -// RUN: %clang_cc1 -fcatch-undefined-behavior -emit-llvm %s -o - | FileCheck %s +// RUN: %clang_cc1 -fsanitize=alignment,null,object-size,shift,return,signed-integer-overflow,vla-bound,float-cast-overflow,divide-by-zero -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s +// RUN: %clang_cc1 -fsanitize=null -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-NULL +// RUN: %clang_cc1 -fsanitize=signed-integer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-OVERFLOW + +// CHECK: @[[INT:.*]] = private unnamed_addr constant { i16, i16, [6 x i8] } { i16 0, i16 11, [6 x i8] c"'int'\00" } + +// FIXME: When we only emit each type once, use [[INT]] more below. +// CHECK: @[[LINE_100:.*]] = private unnamed_addr constant {{.*}}, i32 100, i32 5 {{.*}} @[[INT]], i64 4, i8 1 +// CHECK: @[[LINE_200:.*]] = {{.*}}, i32 200, i32 10 {{.*}}, i64 4, i8 0 +// CHECK: @[[LINE_300_A:.*]] = {{.*}}, i32 300, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} +// CHECK: @[[LINE_300_B:.*]] = {{.*}}, i32 300, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} +// CHECK: @[[LINE_400:.*]] = {{.*}}, i32 400, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} +// CHECK: @[[LINE_500:.*]] = {{.*}}, i32 500, i32 10 {{.*}} @{{.*}}, i64 4, i8 0 } +// CHECK: @[[LINE_600:.*]] = {{.*}}, i32 600, i32 3 {{.*}} @{{.*}}, i64 4, i8 1 } + +// CHECK: @[[STRUCT_S:.*]] = private unnamed_addr constant { i16, i16, [11 x i8] } { i16 -1, i16 0, [11 x i8] c"'struct S'\00" } + +// CHECK: @[[LINE_700:.*]] = {{.*}}, i32 700, i32 14 {{.*}} @[[STRUCT_S]], i64 4, i8 3 } +// CHECK: @[[LINE_800:.*]] = {{.*}}, i32 800, i32 12 {{.*}} @{{.*}} } +// CHECK: @[[LINE_900:.*]] = {{.*}}, i32 900, i32 11 {{.*}} @{{.*}} } + +// CHECK-NULL: @[[LINE_100:.*]] = private unnamed_addr constant {{.*}}, i32 100, i32 5 {{.*}} // PR6805 // CHECK: @foo +// CHECK-NULL: @foo void foo() { union { int i; } u; - // CHECK: objectsize - // CHECK: icmp uge + // CHECK: %[[CHECK0:.*]] = icmp ne {{.*}}* %[[PTR:.*]], null + + // CHECK: %[[I8PTR:.*]] = bitcast i32* %[[PTR]] to i8* + // CHECK-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64(i8* %[[I8PTR]], i1 false) + // CHECK-NEXT: %[[CHECK1:.*]] = icmp uge i64 %[[SIZE]], 4 + // CHECK-NEXT: %[[CHECK01:.*]] = and i1 %[[CHECK0]], %[[CHECK1]] + + // CHECK: %[[PTRTOINT:.*]] = ptrtoint {{.*}}* %[[PTR]] to i64 + // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRTOINT]], 3 + // CHECK-NEXT: %[[CHECK2:.*]] = icmp eq i64 %[[MISALIGN]], 0 + + // CHECK: %[[OK:.*]] = and i1 %[[CHECK01]], %[[CHECK2]] + // CHECK-NEXT: br i1 %[[OK]] + + // CHECK: %[[ARG:.*]] = ptrtoint {{.*}} %[[PTR]] to i64 + // CHECK-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %[[ARG]]) noreturn nounwind + + // With -fsanitize=null, only perform the null check. + // CHECK-NULL: %[[NULL:.*]] = icmp ne {{.*}}, null + // CHECK-NULL: br i1 %[[NULL]] + // CHECK-NULL: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %{{.*}}) noreturn nounwind +#line 100 u.i=1; } // CHECK: @bar int bar(int *a) { - // CHECK: objectsize - // CHECK: icmp uge + // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 + // CHECK-NEXT: icmp uge i64 %[[SIZE]], 4 + + // CHECK: %[[PTRINT:.*]] = ptrtoint + // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 + // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0 + + // CHECK: %[[ARG:.*]] = ptrtoint + // CHECK-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_200]] to i8*), i64 %[[ARG]]) noreturn nounwind +#line 200 + return *a; +} + +// CHECK: @addr_space +int addr_space(int __attribute__((address_space(256))) *a) { + // CHECK-NOT: __ubsan return *a; } + +// CHECK: @lsh_overflow +int lsh_overflow(int a, int b) { + // CHECK: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 + // CHECK-NEXT: br i1 %[[INBOUNDS]] + + // FIXME: Only emit one trap block here. + // CHECK: %[[ARG1:.*]] = zext + // CHECK-NEXT: %[[ARG2:.*]] = zext + // CHECK-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300_A]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) noreturn nounwind + + // CHECK: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] + // CHECK-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] + // CHECK-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0 + // CHECK-NEXT: br i1 %[[NO_OVERFLOW]] + + // CHECK: %[[ARG1:.*]] = zext + // CHECK-NEXT: %[[ARG2:.*]] = zext + // CHECK-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300_B]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) noreturn nounwind + + // CHECK: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] + // CHECK-NEXT: ret i32 %[[RET]] +#line 300 + return a << b; +} + +// CHECK: @rsh_inbounds +int rsh_inbounds(int a, int b) { + // CHECK: %[[INBOUNDS:.*]] = icmp ult i32 %[[RHS:.*]], 32 + // CHECK: br i1 %[[INBOUNDS]] + + // CHECK: %[[ARG1:.*]] = zext + // CHECK-NEXT: %[[ARG2:.*]] = zext + // CHECK-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_400]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) noreturn nounwind + + // CHECK: %[[RET:.*]] = ashr i32 %[[LHS]], %[[RHS]] + // CHECK-NEXT: ret i32 %[[RET]] +#line 400 + return a >> b; +} + +// CHECK: @load +int load(int *p) { + // CHECK: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_500]] to i8*), i64 %{{.*}}) noreturn nounwind +#line 500 + return *p; +} + +// CHECK: @store +void store(int *p, int q) { + // CHECK: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_600]] to i8*), i64 %{{.*}}) noreturn nounwind +#line 600 + *p = q; +} + +struct S { int k; }; + +// CHECK: @member_access +int *member_access(struct S *p) { + // CHECK: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_700]] to i8*), i64 %{{.*}}) noreturn nounwind +#line 700 + return &p->k; +} + +// CHECK: @signed_overflow +int signed_overflow(int a, int b) { + // CHECK: %[[ARG1:.*]] = zext + // CHECK-NEXT: %[[ARG2:.*]] = zext + // CHECK-NEXT: call void @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_800]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) noreturn nounwind +#line 800 + return a + b; +} + +// CHECK: @no_return +int no_return() { + // Reaching the end of a noreturn function is fine in C. + // FIXME: If the user explicitly requests -fsanitize=return, we should catch + // that here even though it's not undefined behavior. + // CHECK-NOT: call + // CHECK-NOT: unreachable + // CHECK: ret i32 +} + +// CHECK: @vla_bound +void vla_bound(int n) { + // CHECK: icmp sgt i32 %[[PARAM:.*]], 0 + // + // CHECK: %[[ARG:.*]] = zext i32 %[[PARAM]] to i64 + // CHECK-NEXT: call void @__ubsan_handle_vla_bound_not_positive(i8* bitcast ({{.*}} @[[LINE_900]] to i8*), i64 %[[ARG]]) noreturn nounwind +#line 900 + int arr[n * 3]; +} + +// CHECK: @int_float_no_overflow +float int_float_no_overflow(__int128 n) { + // CHECK-NOT: call void @__ubsan_handle + return n; +} + +// CHECK: @int_float_overflow +float int_float_overflow(unsigned __int128 n) { + // This is 2**104. FLT_MAX is 2**128 - 2**104. + // CHECK: icmp ule i128 %{{.*}}, -20282409603651670423947251286016 + // CHECK: call void @__ubsan_handle_float_cast_overflow( + return n; +} + +// CHECK: @int_fp16_overflow +void int_fp16_overflow(int n, __fp16 *p) { + // CHECK: %[[GE:.*]] = icmp sge i32 %{{.*}}, -65504 + // CHECK: %[[LE:.*]] = icmp sle i32 %{{.*}}, 65504 + // CHECK: and i1 %[[GE]], %[[LE]] + // CHECK: call void @__ubsan_handle_float_cast_overflow( + *p = n; +} + +// CHECK: @float_int_overflow +int float_int_overflow(float f) { + // CHECK: %[[GE:.*]] = fcmp oge float %[[F:.*]], 0xC1E0000000000000 + // CHECK: %[[LE:.*]] = fcmp ole float %[[F]], 0x41DFFFFFE0000000 + // CHECK: and i1 %[[GE]], %[[LE]] + // CHECK: call void @__ubsan_handle_float_cast_overflow( + return f; +} + +// CHECK: @float_uint_overflow +unsigned float_uint_overflow(float f) { + // CHECK: %[[GE:.*]] = fcmp oge float %[[F:.*]], 0.{{0*}}e+00 + // CHECK: %[[LE:.*]] = fcmp ole float %[[F]], 0x41EFFFFFE0000000 + // CHECK: and i1 %[[GE]], %[[LE]] + // CHECK: call void @__ubsan_handle_float_cast_overflow( + return f; +} + +// CHECK: @fp16_char_overflow +signed char fp16_char_overflow(__fp16 *p) { + // CHECK: %[[GE:.*]] = fcmp oge float %[[F:.*]], -1.28{{0*}}e+02 + // CHECK: %[[LE:.*]] = fcmp ole float %[[F]], 1.27{{0*}}e+02 + // CHECK: and i1 %[[GE]], %[[LE]] + // CHECK: call void @__ubsan_handle_float_cast_overflow( + return *p; +} + +// CHECK: @float_float_overflow +float float_float_overflow(double f) { + // CHECK: %[[GE:.*]] = fcmp oge double %[[F:.*]], 0xC7EFFFFFE0000000 + // CHECK: %[[LE:.*]] = fcmp ole double %[[F]], 0x47EFFFFFE0000000 + // CHECK: and i1 %[[GE]], %[[LE]] + // CHECK: call void @__ubsan_handle_float_cast_overflow( + return f; +} + +// CHECK: @int_divide_overflow +// CHECK-OVERFLOW: @int_divide_overflow +int int_divide_overflow(int a, int b) { + // CHECK: %[[ZERO:.*]] = icmp ne i32 %[[B:.*]], 0 + // CHECK-OVERFLOW-NOT: icmp ne i32 %{{.*}}, 0 + + // CHECK: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 + // CHECK-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B]], -1 + // CHECK-NEXT: %[[OVER:.*]] = or i1 %[[AOK]], %[[BOK]] + + // CHECK-OVERFLOW: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 + // CHECK-OVERFLOW-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B:.*]], -1 + // CHECK-OVERFLOW-NEXT: %[[OK:.*]] = or i1 %[[AOK]], %[[BOK]] + + // CHECK: %[[OK:.*]] = and i1 %[[ZERO]], %[[OVER]] + + // CHECK: br i1 %[[OK]] + // CHECK-OVERFLOW: br i1 %[[OK]] + return a / b; + + // CHECK: } + // CHECK-OVERFLOW: } +} |