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Summary: This patch adds backend support for -Rpass=, which indicates the name of the optimization pass that should emit remarks stating when it made a transformation to the code. Pass names are taken from their DEBUG_NAME definitions. When emitting an optimization report diagnostic, the lack of debug information causes the diagnostic to use "<unknown>:0:0" as the location string. This is the back end counterpart for http://llvm-reviews.chandlerc.com/D3226 Reviewers: qcolombet CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D3227 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205774 91177308-0d34-0410-b5e6-96231b3b80d8
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