clang/test/CodeGen/sanitize-trap.c

   1 // 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
   2
   3 int f(int x, int y) {
   4   // CHECK: %[[B1:.*]] = icmp ne i32 %[[D:.*]], 0
   5   // CHECK: %[[B2:.*]] = icmp ne i32 %[[N:.*]], -2147483648
   6   // CHECK: %[[B3:.*]] = icmp ne i32 %[[D]], -1
   7   // CHECK: %[[B4:.*]] = or i1 %[[B2]], %[[B3]]
   8   // CHECK: br i1 %[[B1]], label %[[L1:[0-9a-z_.]*]], label %[[L2:[0-9a-z_.]*]]
   9
  10   // {{^|:}} used to match both Debug form of the captured label
  11   // cont:
  12   // and Release form
  13   // ; <label>:14
  14   // But avoids false matches inside other numbers such as [114 x i8].
  15   // CHECK: {{^|:}}[[L2]]
  16   // CHECK-NEXT: call void @llvm.ubsantrap(i8 3)
  17   // CHECK-NEXT: unreachable
  18
  19   // CHECK: {{^|:}}[[L1]]
  20   // CHECK-NEXT: br i1 %[[B4]], label %[[L3:[0-9a-z_.]*]], label %[[L4:[0-9a-z_.]*]]
  21
  22   // CHECK: {{^|:}}[[L4]]
  23   // CHECK-NEXT: zext
  24   // CHECK-NEXT: zext
  25   // CHECK-NEXT: __ubsan_handle_divrem_overflow
  26
  27   // CHECK: {{^|:}}[[L3]]
  28   // CHECK-NEXT: sdiv i32 %[[N]], %[[D]]
  29   return x / y;
  30 }