File: sanitize-trap.c

package info (click to toggle)
flang 20181226-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 181,072 kB
  • sloc: cpp: 1,182,685; ansic: 598,652; objc: 103,775; f90: 57,054; python: 15,041; fortran: 13,601; lisp: 10,416; perl: 2,460; asm: 2,148; sh: 1,544; awk: 995; cs: 565; xml: 403; lex: 295; makefile: 225; pascal: 130
file content (30 lines) | stat: -rw-r--r-- 1,087 bytes parent folder | download | duplicates (14)
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
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s -fsanitize=signed-integer-overflow,integer-divide-by-zero -fsanitize-trap=integer-divide-by-zero | FileCheck %s

int f(int x, int y) {
  // CHECK: %[[B1:.*]] = icmp ne i32 %[[D:.*]], 0
  // CHECK: %[[B2:.*]] = icmp ne i32 %[[N:.*]], -2147483648
  // CHECK: %[[B3:.*]] = icmp ne i32 %[[D]], -1
  // CHECK: %[[B4:.*]] = or i1 %[[B2]], %[[B3]]
  // CHECK: br i1 %[[B1]], label %[[L1:[0-9a-z_.]*]], label %[[L2:[0-9a-z_.]*]]

  // {{^|:}} used to match both Debug form of the captured label
  // cont:
  // and Release form
  // ; <label>:14
  // But avoids false matches inside other numbers such as [114 x i8].
  // CHECK: {{^|:}}[[L2]]
  // CHECK-NEXT: call void @llvm.trap()
  // CHECK-NEXT: unreachable

  // CHECK: {{^|:}}[[L1]]
  // CHECK-NEXT: br i1 %[[B4]], label %[[L3:[0-9a-z_.]*]], label %[[L4:[0-9a-z_.]*]]

  // CHECK: {{^|:}}[[L4]]
  // CHECK-NEXT: zext
  // CHECK-NEXT: zext
  // CHECK-NEXT: __ubsan_handle_divrem_overflow

  // CHECK: {{^|:}}[[L3]]
  // CHECK-NEXT: sdiv i32 %[[N]], %[[D]]
  return x / y;
}