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3 Commits

Author SHA1 Message Date
Kevin B. Smith 54566a0e9a [X86]: Quit promoting 8 and 16 bit compares to 32 bit. 
Differential Revision: http://reviews.llvm.org/D21144

llvm-svn: 272801
 2016-06-15 16:37:46 +00:00
Sanjoy Das 881de4d12a [X86] Fix a bug in getMemOpBaseRegImmOfs 
Fix a crash in `getMemOpBaseRegImmOfs` that happens if the base of
`MemOp` is a frame index memory operand.  The fix is to have
`getMemOpBaseRegImmOfs` bail out in such cases.  We can possibly be more
clever here, if needed.

llvm-svn: 259456
 2016-02-02 02:32:43 +00:00
Sanjoy Das 16901a3e20 [MachineSink] Don't break ImplicitNulls 
Summary:
This teaches MachineSink to not sink instructions that might break the
implicit null check optimization that runs later.  This should not
affect frontends that do not use implicit null checks.

Reviewers: aadg, reames, hfinkel, atrick

Subscribers: majnemer, llvm-commits

Differential Revision: http://reviews.llvm.org/D14632

llvm-svn: 258254
 2016-01-20 00:06:14 +00:00