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[SLSR] garbage-collect unused instructions
authorJingyue Wu <jingyue@google.com>
Tue, 21 Apr 2015 19:56:18 +0000 (19:56 +0000)
committerJingyue Wu <jingyue@google.com>
Tue, 21 Apr 2015 19:56:18 +0000 (19:56 +0000)
commitf1edf3e88fe38b97d52f8e493bf4ea9caf3f8f91
tree6a3c7e2303e8365532e057aa07b804604bc83ea1tree | snapshot
parentf763c3fd459c1488970482127100897838abc6dccommit | diff
[SLSR] garbage-collect unused instructions

Summary:
After we rewrite a candidate, the instructions used by the old form may
become unused. This patch cleans up these unused instructions so that we
needn't run DCE after SLSR.

Test Plan: removed -dce in all the SLSR tests

Reviewers: broune, meheff

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D9101

llvm-svn: 235410
llvm/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp diff | blob | history
llvm/test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll diff | blob | history
llvm/test/Transforms/StraightLineStrengthReduce/slsr-add.ll diff | blob | history
llvm/test/Transforms/StraightLineStrengthReduce/slsr-gep.ll diff | blob | history
llvm/test/Transforms/StraightLineStrengthReduce/slsr-mul.ll diff | blob | history
Domain: System / Toolchain;