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2 Commits

Author SHA1 Message Date
Arnold Schwaighofer dc4c9460a2 LoopVectorize: Only strip casts from integer types when replacing symbolic 
strides

Fixes PR18480.

llvm-svn: 199291
 2014-01-15 03:35:46 +00:00
Arnold Schwaighofer c2e9d759f2 LoopVectorizer: Handle strided memory accesses by versioning 
for (i = 0; i < N; ++i)
   A[i * Stride1] += B[i * Stride2];

We take loops like this and check that the symbolic strides 'Strided1/2' are one
and drop to the scalar loop if they are not.

This is currently disabled by default and hidden behind the flag
'enable-mem-access-versioning'.

radar://13075509

llvm-svn: 198950
 2014-01-10 18:20:32 +00:00