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Benjamin Kramer
7ea950a209
InstCombine: Canonicalize (gep i8* X, -(ptrtoint Y)) to (sub (ptrtoint X), (ptrtoint Y))
The GEP pattern is what SCEV expander emits for "ugly geps". The latter is what you get for pointer subtraction in C code. The rest of instcombine already knows how to deal with that so just canonicalize on that. llvm-svn: 191090
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