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3 Commits

Author SHA1 Message Date
Matthew Simpson 9b6755362b [LV] Correct misleading comments in test (NFC) 
llvm-svn: 285402
 2016-10-28 14:27:45 +00:00
Matthew Simpson 1d4b163fc0 [LV] Account for predicated stores in instruction costs 
This patch ensures that we scale the estimated cost of predicated stores by
block probability. This is a follow-on patch for r284123.

llvm-svn: 284126
 2016-10-13 14:54:31 +00:00
Matthew Simpson 6cdb5a6f96 [LV] Avoid rounding errors for predicated instruction costs 
This patch modifies the cost calculation of predicated instructions (div and
rem) to avoid the accumulation of rounding errors due to multiple truncating
integer divisions. The calculation for predicated stores will be addressed in a
follow-on patch since we currently don't scale the cost of predicated stores by
block probability.

Differential Revision: https://reviews.llvm.org/D25333

llvm-svn: 284123
 2016-10-13 14:19:48 +00:00