| 1 | // RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -O3 -emit-llvm -S -verify -o /dev/null |
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| 2 | // REQUIRES: x86-registered-target |
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| 3 | |
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| 4 | // Test verifies optimization failures generated by the backend are handled |
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| 5 | // correctly by clang. LLVM tests verify all of the failure conditions. |
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| 6 | |
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| 7 | void test_switch(int *A, int *B, int Length, int J) { /* expected-warning {{loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering}} */ |
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| 8 | #pragma clang loop vectorize(enable) unroll(disable) |
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| 9 | for (int i = 0; i < Length; i++) { |
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| 10 | switch (A[i]) { |
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| 11 | case 0: |
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| 12 | B[i] = 1; |
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| 13 | break; |
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| 14 | case 1: |
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| 15 | B[J] = 2; |
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| 16 | break; |
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| 17 | default: |
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| 18 | B[i] = 3; |
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| 19 | } |
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| 20 | } |
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| 21 | } |
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| 22 | |
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