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Author SHA1 Message Date
Michael Kuperstein
47eb85a003 [X86] Allow folding of stack reloads when loading a subreg of the spilled reg 
We did not support subregs in InlineSpiller:foldMemoryOperand() because targets
may not deal with them correctly.

This adds a target hook to let the spiller know that a target can handle
subregs, and actually enables it for x86 for the case of stack slot reloads.
This fixes PR30832.

Differential Revision: https://reviews.llvm.org/D26521

llvm-svn: 287792
 2016-11-23 18:33:49 +00:00
Michael Kuperstein
f221f13ccc [X86] Tests exhibiting bad parial reloading behavior. NFC. 
llvm-svn: 286878
 2016-11-14 19:58:11 +00:00