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Commit c3e11bf3 authored by Craig Topper's avatar Craig Topper
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[X86] Add support expanding multiplies by constant where the constant is... 

[X86] Add support expanding multiplies by constant where the constant is -3/-5/-9 multplied by a power of 2.

These can be replaced with an LEA, a shift, and a negate. This seems to match what gcc and icc would do.

llvm-svn: 338174
parent fdfe2a92
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