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Author SHA1 Message Date
Petr Hosek e28fca29fe Revert "[IRBuilder] Fold consistently for or/and whether constant is LHS or RHS" 
This reverts commit r365260 which broke the following tests:

    Clang :: CodeGenCXX/cfi-mfcall.cpp
    Clang :: CodeGenObjC/ubsan-nullability.m
    LLVM :: Transforms/LoopVectorize/AArch64/pr36032.ll

llvm-svn: 365284
 2019-07-07 22:12:01 +00:00
Philip Reames 9812668d77 [IRBuilder] Fold consistently for or/and whether constant is LHS or RHS 
Without this, we have the unfortunate property that tests are dependent on the order of operads passed the CreateOr and CreateAnd functions.  In actual usage, we'd promptly optimize them away, but it made tests slightly more verbose than they should have been.

llvm-svn: 365260
 2019-07-06 04:28:00 +00:00
Joel Galenson 8dbcc58917 Use SCEV to avoid inserting some bounds checks. 
This patch uses SCEV to avoid inserting some bounds checks when they are not needed.  This slightly improves the performance of code compiled with the bounds check sanitizer.

Differential Revision: https://reviews.llvm.org/D49602

llvm-svn: 337830
 2018-07-24 15:21:54 +00:00