20 lines
763 B
C++
20 lines
763 B
C++
// RUN: %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefixes=CHECK,REGULAR
|
|
// 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
|
|
|
|
// CHECK-LABEL: @_Z12lsh_overflow
|
|
int lsh_overflow(int a, int b) {
|
|
// SANITIZED: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
|
|
// SANITIZED-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[VALID:.*]], label
|
|
|
|
// SANITIZED: call void @__ubsan_handle_shift_out_of_bounds
|
|
|
|
// No check for the LHS here.
|
|
// SANITIZED: [[VALID]]:
|
|
// SANITIZED-NEXT: shl i32 %
|
|
// SANITIZED-NEXT: ret i32
|
|
|
|
// Just ensure there's no nsw nuw flags here.
|
|
// REGULAR: shl i32 %
|
|
return a << b;
|
|
}
|