| // RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -O3 -emit-llvm -S -verify -o /dev/null |
| // REQUIRES: x86-registered-target |
| |
| // Test verifies optimization failures generated by the backend are handled |
| // correctly by clang. LLVM tests verify all of the failure conditions. |
| |
| void test_switch(int *A, int *B, int Length) { |
| #pragma clang loop vectorize(enable) unroll(disable) |
| for (int i = 0; i < Length; i++) { |
| switch (A[i]) { |
| case 0: |
| B[i] = 1; |
| break; |
| case 1: |
| B[i] = 2; |
| break; |
| default: |
| B[i] = 3; |
| } |
| } |
| /* expected-warning {{loop not vectorized: failed explicitly specified loop vectorization}} */ } |