Sanjay Patel 37c41c1d2c merge consecutive stores of extracted vector elements (PR21711) ...

This is a 2nd try at the same optimization as http://reviews.llvm.org/D6698. 
That patch was checked in at r224611, but reverted at r225031 because it
caused a failure outside of the regression tests.

The cause of the crash was not recognizing consecutive stores that have mixed
source values (loads and vector element extracts), so this patch adds a check
to bail out if any store value is not coming from a vector element extract.

This patch also refactors the shared logic of the constant source and vector
extracted elements source cases into a helper function.

Differential Revision: http://reviews.llvm.org/D6850
 

llvm-svn: 226845

2015-01-22 18:21:26 +00:00

490 KiB

Raw Blame History

View Raw