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3 Commits

Author SHA1 Message Date
James Molloy
3c39c7c1b4 [AArch64] Redundant store instructions should be removed as dead code 
If there is a store followed by a store with the same value to the same location, then the store is dead/noop. It can be removed.

This problem is found in spec2006-197.parser.

For example,
  stur    w10, [x11, #-4]
  stur    w10, [x11, #-4]
Then one of the two stur instructions can be removed.

Patch by David Xu!

llvm-svn: 218569
 2014-09-27 17:02:54 +00:00
David Xu
a2ad12fe59 Revert patch of r218493, delete the test case 
llvm-svn: 218495
 2014-09-26 02:40:54 +00:00
David Xu
43a5d5bdc1 Redundant store instructions should be removed as dead code 
llvm-svn: 218493
 2014-09-26 02:02:09 +00:00