File: ubsan-bitfields.cpp

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (34 lines) | stat: -rw-r--r-- 805 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=bool,enum | FileCheck %s

enum E {
  a = 1,
  b = 2,
  c = 3
};

struct S {
  E e1 : 10;
};

// CHECK-LABEL: define{{.*}} i32 @_Z4loadP1S
E load(S *s) {
  // CHECK: [[LOAD:%.*]] = load i16, ptr {{.*}}
  // CHECK: [[CLEAR:%.*]] = and i16 [[LOAD]], 1023
  // CHECK: [[CAST:%.*]] = zext i16 [[CLEAR]] to i32
  // CHECK: icmp ule i32 [[CAST]], 3, !nosanitize
  // CHECK: call void @__ubsan_handle_load_invalid_value
  return s->e1;
}

struct Bool {
  bool b1 : 1;
  bool b2 : 7;
  bool b3 : 16;
};

// CHECK-LABEL: define{{.*}} zeroext i1 @_Z13load_cpp_boolP4Bool
bool load_cpp_bool(Bool *b) {
  // CHECK-NOT: call void @__ubsan_handle_load_invalid_value
  // CHECK-NOT: !nosanitize
  return b->b1 || b->b2 || b->b3;
}