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| author | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2015-07-22 10:29:29 +0000 |
|---|---|---|
| committer | Michael Kuperstein <michael.m.kuperstein@intel.com> | 2015-07-22 10:29:29 +0000 |
| commit | d72403636c9426a7a522d4d9502d2b0ecf306261 (patch) | |
| tree | 07d3a9af92a1f8c8cb5d3f77df52c245bb8c88f6 /llvm/lib/Transforms/Vectorize/Vectorize.cpp | |
| parent | 8ec94ead7d1cfa2afb907b465a5f9d960713e98f (diff) | |
| download | bcm5719-llvm-d72403636c9426a7a522d4d9502d2b0ecf306261.tar.gz bcm5719-llvm-d72403636c9426a7a522d4d9502d2b0ecf306261.zip | |
Fix mem2reg to correctly handle allocas only used in a single block
Currently, a load from an alloca that is used in as single block and is not preceded
by a store is replaced by undef. This is not always correct if the single block is
inside a loop.
Fix the logic so that:
1) If there are no stores in the block, replace the load with an undef, as before.
2) If there is a store (regardless of where it is in the block w.r.t the load), bail
out, and let the rest of mem2reg handle this alloca.
Patch by: gil.rapaport@intel.com
Differential Revision: http://reviews.llvm.org/D11355
llvm-svn: 242884
Diffstat (limited to 'llvm/lib/Transforms/Vectorize/Vectorize.cpp')
0 files changed, 0 insertions, 0 deletions
