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Author SHA1 Message Date
Haicheng Wu b3689cabda [InlineCost] Skip volatile loads when looking for repeated loads 
This is a follow-up fix of r320814.  A test case is also added.

llvm-svn: 321075
 2017-12-19 13:42:58 +00:00
Haicheng Wu a446151552 [InlineCost] Find repeated loads in the callee 
SROA analysis of InlineCost can figure out that some stores can be removed
after inlining and then the repeated loads clobbered by these stores are also
free.  This patch finds these clobbered loads and adjust the inline cost
accordingly.

Differential Revision: https://reviews.llvm.org/D33946

llvm-svn: 320814
 2017-12-15 14:34:41 +00:00