1// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -O3 -emit-llvm -debug-info-kind=line-tables-only -S -verify -o /dev/null
2// REQUIRES: x86-registered-target
3
4// Test verifies optimization failures generated by the backend are handled
5// correctly by clang. LLVM tests verify all of the failure conditions.
6
7void test_switch(int *A, int *B, int Length) {
8#pragma clang loop vectorize(enable) unroll(disable)
9  for (int i = 0; i < Length; i++) {
10/* expected-warning@-1 {{loop not vectorized: failed explicitly specified loop vectorization}} */ switch (A[i]) {
11    case 0:
12      B[i] = 1;
13      break;
14    case 1:
15      B[i] = 2;
16      break;
17    default:
18      B[i] = 3;
19    }
20  }
21}
22