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Commit f6329ec2 authored by Serge Guelton's avatar Serge Guelton
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Fix invalid cast in instcombine UMul/ZExt idiom 

Fixes https://bugs.llvm.org/show_bug.cgi?id=25454

Do not assume IRBuilder creates Instruction where it can create Value.
Do not assume idiom operands are constant, leave generalisation ot the IRBuilder.

Differential Revision: https://reviews.llvm.org/D35114

llvm-svn: 307554
parent 168d14b1
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