[InstCombine] Folding of a binop with RHS const should merge the debug locations
authorRobert Lougher <rob.lougher@gmail.com>
Wed, 14 Dec 2016 20:07:49 +0000 (20:07 +0000)
committerRobert Lougher <rob.lougher@gmail.com>
Wed, 14 Dec 2016 20:07:49 +0000 (20:07 +0000)
commitc9f73547769578473a8f0fbefcfbe8573441e6dd
treed11efe520214362cca0f0aa46e1c4aff4350b582
parent418ed82eae376234b21083b86b28eac7f8685546
[InstCombine] Folding of a binop with RHS const should merge the debug locations

If all the operands to a phi node are a binop with a RHS constant, instcombine
will try to pull them through the phi node, combining them into a single
operation. When it does this, the debug location of the new op should be the
merged debug locations of the phi node arguments.

Patch 7 of 8 for D26256.  Folding of a binop with RHS constant.

Differential Revision: https://reviews.llvm.org/D26256

llvm-svn: 289699
llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp
llvm/test/DebugInfo/Generic/instcombine-phi.ll