[PATCH] [SLSR] handle candidate form &B[i * S]
Jingyue Wu
jingyue at google.com
Thu Feb 5 22:57:36 PST 2015
Hi hfinkel, atrick, meheff, eliben,
This patch enhances SLSR to handle another candidate form &B[i * S]. If
we found two candidates
S1: X = &B[i * S]
S2: Y = &B[i' * S]
and S1 dominates S2, we can replace S2 with
Y = &X[(i' - i) * S]
http://reviews.llvm.org/D7459
Files:
lib/Transforms/Scalar/StraightLineStrengthReduce.cpp
test/Transforms/StraightLineStrengthReduce/X86/lit.local.cfg
test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll
test/Transforms/StraightLineStrengthReduce/slsr-gep.ll
test/Transforms/StraightLineStrengthReduce/slsr-mul.ll
test/Transforms/StraightLineStrengthReduce/slsr.ll
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