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Sam Parker
1bba626c44
In the last stage of type promotion, we replace any zext that uses a new trunc with the operand of the trunc. This is okay when we only allowed one type to be optimised, but now its the case that the trunc maybe needed to produce a more narrow type than the one we were optimising for. So we need to check this before doing the replacement. Differential Revision: https://reviews.llvm.org/D57041 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351935 91177308-0d34-0410-b5e6-96231b3b80d8