1 // RUN: %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,REGULAR
2 // RUN: %clang_cc1 -std=c++2a -fsanitize=shift-base,shift-exponent -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,SANITIZED
3
4 // CHECK-LABEL: @_Z12lsh_overflow
lsh_overflow(int a,int b)5 int lsh_overflow(int a, int b) {
6 // SANITIZED: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
7 // SANITIZED-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[VALID:.*]], label
8
9 // SANITIZED: call void @__ubsan_handle_shift_out_of_bounds
10
11 // No check for the LHS here.
12 // SANITIZED: [[VALID]]:
13 // SANITIZED-NEXT: shl i32 %
14 // SANITIZED-NEXT: ret i32
15
16 // Just ensure there's no nsw nuw flags here.
17 // REGULAR: shl i32 %
18 return a << b;
19 }
20