File: ubsan-bitfields.cpp

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (34 lines) | stat: -rw-r--r-- 826 bytes parent folder | download 
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 -no-opaque-pointers -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, i16* {{.*}}
  // 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;
}