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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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