[TEST] Fix division by 0 in llvm codegen test #14232
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In the test `test_llvm_div`, some cases can lead to a division by 0. Consider the case when `start=-12, end=-12, dstart=-2 and dend=0`, the range of values input to clipb() will be: [-12, ..., -1, 1] (with 1 being specially selected to prevent division by 0). For the input 1, clipb evaluates to: min(/*dend=*/0, max(/*dstart=*/-12, /*i=*/1)) = 0, thus leading to a division by 0. LLVM11, which runs in CI, doesn't seem to throw any kind of error, while using LLVM15 leads to a "floating point exception". Regardless, since division by 0 is undefined behaviour and the compiler can do anything, the solution here is to fix the test so division by 0 doesn't occur. Change-Id: Ib82776e9e0aff443dacc101a579d382059bb9826
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ashutosh-arm
reviewed
Mar 8, 2023
junrushao
approved these changes
Mar 8, 2023
ashutosh-arm
approved these changes
Mar 8, 2023
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In the test
test_llvm_div, some cases can lead to a division by 0. Consider the case whenstart=-12, end=-12, dstart=-2 and dend=0, the range of values input to clipb() will be: [-12, ..., -1, 1] (with 1 being specially selected to prevent division by 0). For the input 1, clipb evaluates to:min(/*dend=*/0, max(/*dstart=*/-12, /*i=*/1)) = 0, thus leading to a division by 0.LLVM11, which runs in CI, doesn't seem to throw any kind of error, while using LLVM15 leads to a "floating point exception". Regardless, since division by 0 is undefined behaviour and the compiler can do anything, the solution here is to fix the test so division by 0 doesn't occur.