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Commit 04934b0f authored by Duncan P. N. Exon Smith's avatar Duncan P. N. Exon Smith
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InstCombine: Fix a crash in Descale for multiply-by-zero 

Fix a crash in `InstCombiner::Descale()` when a multiply-by-zero gets
created as an argument to a GEP partway through an iteration, causing
-instcombine to optimize the GEP before the multiply.

rdar://problem/17615671

llvm-svn: 212742
parent c1f152ee
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