edadecbe66
r230921 broke backend-optimization-failure.cpp: after r230921, LLVM no longer emits an expression to compute 'Length - 1' and this perturbs LoopSimplify enough to emit the warning on line 10 instead of line 9. This is a review request to fix the test case once I re-land r230921. llvm-svn: 231020
22 lines
667 B
C++
22 lines
667 B
C++
// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -O3 -emit-llvm -gline-tables-only -S -verify -o /dev/null
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// REQUIRES: x86-registered-target
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// Test verifies optimization failures generated by the backend are handled
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// correctly by clang. LLVM tests verify all of the failure conditions.
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void test_switch(int *A, int *B, int Length) {
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#pragma clang loop vectorize(enable) unroll(disable)
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for (int i = 0; i < Length; i++) {
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/* expected-warning {{loop not vectorized: failed explicitly specified loop vectorization}} */ switch (A[i]) {
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case 0:
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B[i] = 1;
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break;
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case 1:
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B[i] = 2;
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break;
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default:
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B[i] = 3;
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}
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}
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}
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