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// RUN: %clang_cc1 -fsanitize=alignment,null,object-size,shift,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
// RUN: %clang_cc1 -fsanitize-undefined-trap-on-error -fsanitize=alignment,null,object-size,shift,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-TRAP
// 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 global {{.*}}, i32 100, i32 5 {{.*}} @[[INT]], i64 4, i8 1
// CHECK: @[[LINE_200:.*]] = {{.*}}, i32 200, i32 10 {{.*}}, i64 4, i8 0
// CHECK: @[[LINE_300:.*]] = {{.*}}, 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 global {{.*}}, i32 100, i32 5 {{.*}}
// PR6805
// CHECK: @foo
// CHECK-NULL: @foo
// CHECK-TRAP: @foo
void foo() {
union { int i; } u;
// CHECK: %[[CHECK0:.*]] = icmp ne {{.*}}* %[[PTR:.*]], null
// CHECK-TRAP: %[[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-TRAP: %[[I8PTR:.*]] = bitcast i32* %[[PTR]] to i8*
// CHECK-TRAP-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64(i8* %[[I8PTR]], i1 false)
// CHECK-TRAP-NEXT: %[[CHECK1:.*]] = icmp uge i64 %[[SIZE]], 4
// CHECK-TRAP-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-TRAP: %[[PTRTOINT:.*]] = ptrtoint {{.*}}* %[[PTR]] to i64
// CHECK-TRAP-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRTOINT]], 3
// CHECK-TRAP-NEXT: %[[CHECK2:.*]] = icmp eq i64 %[[MISALIGN]], 0
// CHECK: %[[OK:.*]] = and i1 %[[CHECK01]], %[[CHECK2]]
// CHECK-NEXT: br i1 %[[OK]], {{.*}} !prof ![[WEIGHT_MD:.*]]
// CHECK-TRAP: %[[OK:.*]] = and i1 %[[CHECK01]], %[[CHECK2]]
// CHECK-TRAP-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]])
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW:#[0-9]+]]
// CHECK-TRAP-NEXT: unreachable
// 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 %{{.*}})
#line 100
u.i=1;
}
// CHECK: @bar
// CHECK-TRAP: @bar
int bar(int *a) {
// CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
// CHECK-NEXT: icmp uge i64 %[[SIZE]], 4
// CHECK-TRAP: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
// CHECK-TRAP-NEXT: icmp uge i64 %[[SIZE]], 4
// CHECK: %[[PTRINT:.*]] = ptrtoint
// CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3
// CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
// CHECK-TRAP: %[[PTRINT:.*]] = ptrtoint
// CHECK-TRAP-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3
// CHECK-TRAP-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]])
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
#line 200
return *a;
}
// CHECK: @addr_space
int addr_space(int __attribute__((address_space(256))) *a) {
// CHECK-NOT: __ubsan
return *a;
}
// CHECK: @lsh_overflow
// CHECK-TRAP: @lsh_overflow
int lsh_overflow(int a, int b) {
// CHECK: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
// CHECK-NEXT: br i1 %[[INBOUNDS]], label %[[CHECKBB:.*]], label %[[CONTBB:.*]]
// CHECK-TRAP: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]], label %[[CHECKBB:.*]], label %[[CONTBB:.*]]
// 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 label %[[CONTBB]]
// CHECK-TRAP: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]]
// CHECK-TRAP-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]]
// CHECK-TRAP-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0
// CHECK-TRAP-NEXT: br label %[[CONTBB]]
// CHECK: %[[VALID:.*]] = phi i1 [ %[[INBOUNDS]], {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECKBB]] ]
// CHECK-NEXT: br i1 %[[VALID]], {{.*}} !prof ![[WEIGHT_MD]]
// CHECK-TRAP: %[[VALID:.*]] = phi i1 [ %[[INBOUNDS]], {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECKBB]] ]
// CHECK-TRAP-NEXT: br i1 %[[VALID]]
// CHECK: %[[ARG1:.*]] = zext
// CHECK-NEXT: %[[ARG2:.*]] = zext
// CHECK-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]])
// CHECK-NOT: call void @__ubsan_handle_shift_out_of_bounds
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP: unreachable
// CHECK-TRAP-NOT: call void @llvm.trap()
// CHECK: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]]
// CHECK-NEXT: ret i32 %[[RET]]
// CHECK-TRAP: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]]
// CHECK-TRAP-NEXT: ret i32 %[[RET]]
#line 300
return a << b;
}
// CHECK: @rsh_inbounds
// CHECK-TRAP: @rsh_inbounds
int rsh_inbounds(int a, int b) {
// CHECK: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
// CHECK: br i1 %[[INBOUNDS]]
// CHECK-TRAP: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
// CHECK-TRAP: 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]])
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
// CHECK: %[[RET:.*]] = ashr i32 %[[LHS]], %[[RHS]]
// CHECK-NEXT: ret i32 %[[RET]]
// CHECK-TRAP: %[[RET:.*]] = ashr i32 %[[LHS]], %[[RHS]]
// CHECK-TRAP-NEXT: ret i32 %[[RET]]
#line 400
return a >> b;
}
// CHECK: @load
// CHECK-TRAP: @load
int load(int *p) {
// CHECK: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_500]] to i8*), i64 %{{.*}})
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
#line 500
return *p;
}
// CHECK: @store
// CHECK-TRAP: @store
void store(int *p, int q) {
// CHECK: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_600]] to i8*), i64 %{{.*}})
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
#line 600
*p = q;
}
struct S { int k; };
// CHECK: @member_access
// CHECK-TRAP: @member_access
int *member_access(struct S *p) {
// CHECK: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_700]] to i8*), i64 %{{.*}})
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
#line 700
return &p->k;
}
// CHECK: @signed_overflow
// CHECK-TRAP: @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]])
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
#line 800
return a + b;
}
// CHECK: @no_return
// CHECK-TRAP: @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-TRAP-NOT: call
// CHECK-TRAP-NOT: unreachable
// CHECK-TRAP: 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]])
#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
// CHECK-TRAP: @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(
// CHECK-TRAP: %[[INBOUNDS:.*]] = icmp ule i128 %{{.*}}, -20282409603651670423947251286016
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
return n;
}
// CHECK: @int_fp16_overflow
// CHECK-TRAP: @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(
// CHECK-TRAP: %[[GE:.*]] = icmp sge i32 %{{.*}}, -65504
// CHECK-TRAP: %[[LE:.*]] = icmp sle i32 %{{.*}}, 65504
// CHECK-TRAP: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]]
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
*p = n;
}
// CHECK: @float_int_overflow
// CHECK-TRAP: @float_int_overflow
int float_int_overflow(float f) {
// CHECK: %[[GE:.*]] = fcmp ogt float %[[F:.*]], 0xC1E0000020000000
// CHECK: %[[LE:.*]] = fcmp olt float %[[F]], 0x41E0000000000000
// CHECK: and i1 %[[GE]], %[[LE]]
// CHECK: %[[CAST:.*]] = bitcast float %[[F]] to i32
// CHECK: %[[ARG:.*]] = zext i32 %[[CAST]] to i64
// CHECK: call void @__ubsan_handle_float_cast_overflow({{.*}}, i64 %[[ARG]]
// CHECK-TRAP: %[[GE:.*]] = fcmp ogt float %[[F:.*]], 0xC1E0000020000000
// CHECK-TRAP: %[[LE:.*]] = fcmp olt float %[[F]], 0x41E0000000000000
// CHECK-TRAP: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]]
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
return f;
}
// CHECK: @long_double_int_overflow
// CHECK-TRAP: @long_double_int_overflow
int long_double_int_overflow(long double ld) {
// CHECK: alloca x86_fp80
// CHECK: %[[GE:.*]] = fcmp ogt x86_fp80 %[[F:.*]], 0xKC01E8000000100000000
// CHECK: %[[LE:.*]] = fcmp olt x86_fp80 %[[F]], 0xK401E8000000000000000
// CHECK: and i1 %[[GE]], %[[LE]]
// CHECK: store x86_fp80 %[[F]], x86_fp80* %[[ALLOCA:.*]]
// CHECK: %[[ARG:.*]] = ptrtoint x86_fp80* %[[ALLOCA]] to i64
// CHECK: call void @__ubsan_handle_float_cast_overflow({{.*}}, i64 %[[ARG]]
// CHECK-TRAP: %[[GE:.*]] = fcmp ogt x86_fp80 %[[F:.*]], 0xKC01E800000010000000
// CHECK-TRAP: %[[LE:.*]] = fcmp olt x86_fp80 %[[F]], 0xK401E800000000000000
// CHECK-TRAP: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]]
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
return ld;
}
// CHECK: @float_uint_overflow
// CHECK-TRAP: @float_uint_overflow
unsigned float_uint_overflow(float f) {
// CHECK: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.{{0*}}e+00
// CHECK: %[[LE:.*]] = fcmp olt float %[[F]], 0x41F0000000000000
// CHECK: and i1 %[[GE]], %[[LE]]
// CHECK: call void @__ubsan_handle_float_cast_overflow(
// CHECK-TRAP: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.{{0*}}e+00
// CHECK-TRAP: %[[LE:.*]] = fcmp olt float %[[F]], 0x41F0000000000000
// CHECK-TRAP: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]]
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
return f;
}
// CHECK: @fp16_char_overflow
// CHECK-TRAP: @fp16_char_overflow
signed char fp16_char_overflow(__fp16 *p) {
// CHECK: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.29{{0*}}e+02
// CHECK: %[[LE:.*]] = fcmp olt float %[[F]], 1.28{{0*}}e+02
// CHECK: and i1 %[[GE]], %[[LE]]
// CHECK: call void @__ubsan_handle_float_cast_overflow(
// CHECK-TRAP: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.29{{0*}}e+02
// CHECK-TRAP: %[[LE:.*]] = fcmp olt float %[[F]], 1.28{{0*}}e+02
// CHECK-TRAP: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]]
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
return *p;
}
// CHECK: @float_float_overflow
// CHECK-TRAP: @float_float_overflow
float float_float_overflow(double f) {
// CHECK: %[[F:.*]] = call double @llvm.fabs.f64(
// CHECK: %[[GE:.*]] = fcmp ogt double %[[F]], 0x47EFFFFFE0000000
// CHECK: %[[LE:.*]] = fcmp olt double %[[F]], 0x7FF0000000000000
// CHECK: and i1 %[[GE]], %[[LE]]
// CHECK: call void @__ubsan_handle_float_cast_overflow(
// CHECK-TRAP: %[[F:.*]] = call double @llvm.fabs.f64(
// CHECK-TRAP: %[[GE:.*]] = fcmp ogt double %[[F]], 0x47EFFFFFE0000000
// CHECK-TRAP: %[[LE:.*]] = fcmp olt double %[[F]], 0x7FF0000000000000
// CHECK-TRAP: %[[OUTOFBOUNDS:.*]] = and i1 %[[GE]], %[[LE]]
// CHECK-TRAP: %[[INBOUNDS:.*]] = xor i1 %[[OUTOFBOUNDS]], true
// CHECK-TRAP-NEXT: br i1 %[[INBOUNDS]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP-NEXT: unreachable
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-TRAP: %[[ZERO:.*]] = icmp ne i32 %[[B:.*]], 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-TRAP: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648
// CHECK-TRAP-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B]], -1
// CHECK-TRAP-NEXT: %[[OVER:.*]] = or i1 %[[AOK]], %[[BOK]]
// CHECK: %[[OK:.*]] = and i1 %[[ZERO]], %[[OVER]]
// CHECK: br i1 %[[OK]]
// CHECK-OVERFLOW: br i1 %[[OK]]
// CHECK-TRAP: %[[OK:.*]] = and i1 %[[ZERO]], %[[OVER]]
// CHECK-TRAP: br i1 %[[OK]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP: unreachable
return a / b;
// CHECK: }
// CHECK-OVERFLOW: }
// CHECK-TRAP: }
}
// CHECK: @sour_bool
_Bool sour_bool(_Bool *p) {
// CHECK: %[[OK:.*]] = icmp ule i8 {{.*}}, 1
// CHECK: br i1 %[[OK]]
// CHECK: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}})
// CHECK-TRAP: %[[OK:.*]] = icmp ule i8 {{.*}}, 1
// CHECK-TRAP: br i1 %[[OK]]
// CHECK-TRAP: call void @llvm.trap() [[NR_NUW]]
// CHECK-TRAP: unreachable
return *p;
}
// CHECK: ![[WEIGHT_MD]] = metadata !{metadata !"branch_weights", i32 1048575, i32 1}
// CHECK-TRAP: attributes [[NR_NUW]] = { noreturn nounwind }
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