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Commit 41d7656d authored by Mark Heffernan's avatar Mark Heffernan
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Fix PR21694. r219517 added a use of SCEV divide in HowFarToZero computation. ... 

Fix PR21694. r219517 added a use of SCEV divide in HowFarToZero computation.  This divide can produce incorrect results as we are using an unsigned divide for what should be a modular divide.  This change reverts back to a more conservative computation using trailing zeros.

llvm-svn: 223974
parent 2325e380
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