clang/test/CodeGen/ubsan-shift.c

   1 // RUN: %clang_cc1 -triple=x86_64-apple-darwin -fsanitize=shift-exponent,shift-base -emit-llvm %s -o - | FileCheck %s
   2
   3 // CHECK-LABEL: define{{.*}} i32 @f1
   4 int f1(int c, int shamt) {
   5 // CHECK: icmp ule i32 %{{.*}}, 31, !nosanitize
   6 // CHECK: icmp ule i32 %{{.*}}, 31, !nosanitize
   7   return 1 << (c << shamt);
   8 }
   9
  10 // CHECK-LABEL: define{{.*}} i32 @f2
  11 int f2(long c, int shamt) {
  12 // CHECK: icmp ule i32 %{{.*}}, 63, !nosanitize
  13 // CHECK: icmp ule i64 %{{.*}}, 31, !nosanitize
  14   return 1 << (c << shamt);
  15 }
  16
  17 // CHECK-LABEL: define{{.*}} i32 @f3
  18 unsigned f3(unsigned c, int shamt) {
  19 // CHECK: icmp ule i32 %{{.*}}, 31, !nosanitize
  20 // CHECK: icmp ule i32 %{{.*}}, 31, !nosanitize
  21   return 1U << (c << shamt);
  22 }
  23
  24 // CHECK-LABEL: define{{.*}} i32 @f4
  25 unsigned f4(unsigned long c, int shamt) {
  26 // CHECK: icmp ule i32 %{{.*}}, 63, !nosanitize
  27 // CHECK: icmp ule i64 %{{.*}}, 31, !nosanitize
  28   return 1U << (c << shamt);
  29 }
  30
  31 // CHECK-LABEL: define{{.*}} i32 @f5
  32 int f5(int c, long long shamt) {
  33 // CHECK: icmp ule i64 %{{[0-9]+}}, 31, !nosanitize
  34 //
  35 // CHECK: sub nuw nsw i32 31, %sh_prom, !nosanitize
  36 // CHECK: lshr i32 %{{.*}}, %shl.zeros, !nosanitize
  37   return c << shamt;
  38 }
  39
  40 // CHECK-LABEL: define{{.*}} i32 @f6
  41 int f6(int c, int shamt) {
  42 // CHECK: icmp ule i32 %[[WIDTH:.*]], 31, !nosanitize
  43 //
  44 // CHECK: sub nuw nsw i32 31, %[[WIDTH]], !nosanitize
  45 // CHECK: lshr i32 %{{.*}}, %shl.zeros, !nosanitize
  46   return c << shamt;
  47 }