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archived-llvm/test/CodeGen/PowerPC
Weiming Zhao 7420263227 DAG: avoid duplicated truncating for sign extended operand
Summary:
When performing cmp for EQ/NE and the operand is sign extended, we can
avoid the truncaton if the bits to be tested are no less than origianl
bits.

Reviewers: eli.friedman

Subscribers: eli.friedman, aemerson, nemanjai, t.p.northover, llvm-commits

Differential Revision: https://reviews.llvm.org/D22933

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277252 91177308-0d34-0410-b5e6-96231b3b80d8
2016-07-29 23:33:48 +00:00
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