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Author SHA1 Message Date
Elena Demikhovsky 5e21c94f25 Reverted patch 273864 
llvm-svn: 274115
 2016-06-29 10:01:06 +00:00
Elena Demikhovsky 4c58b2761a Fixed consecutive memory access detection in Loop Vectorizer. 
It did not handle correctly cases without GEP.

The following loop wasn't vectorized:

for (int i=0; i<len; i++)

  *to++ = *from++;

I use getPtrStride() to find Stride for memory access and return 0 is the Stride is not 1 or -1.

Re-commit rL273257 - revision: http://reviews.llvm.org/D20789

llvm-svn: 273864
 2016-06-27 11:19:23 +00:00
Chad Rosier b684e381c9 Add newline to test. NFC. 
llvm-svn: 246653
 2015-09-02 14:06:16 +00:00
James Molloy a860a2216a [LV] Never widen an induction variable. 
There's no need to widen canonical induction variables. It's just as efficient to create a *new*, wide, induction variable.

Consider, if we widen an indvar, then we'll have to truncate it before its uses anyway (1 trunc). If we create a new indvar instead, we'll have to truncate that instead (1 trunc) [besides which IndVars should go and clean up our mess after us anyway on principle].

This lets us remove a ton of special-casing code.

llvm-svn: 246631
 2015-09-02 10:15:05 +00:00