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6cc38f3a79
Summary: Recognize RISBG opportunities where the end result is narrower than the original input - where a truncate separates the shift/and operations. The motivating case is some code in postgres which looks like: srlg %r2, %r0, 11 nilh %r2, 255 Reviewers: uweigand Author: RolandF Differential Revision: http://reviews.llvm.org/D21452 llvm-svn: 273433 |
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