Hiroshi Yamauchi dd33e177dd Irreducible loop metadata for more accurate block frequency under PGO. ... Summary: Currently the block frequency analysis is an approximation for irreducible loops. The new irreducible loop metadata is used to annotate the irreducible loop headers with their header weights based on the PGO profile (currently this is approximated to be evenly weighted) and to help improve the accuracy of the block frequency analysis for irreducible loops. This patch is a basic support for this. Reviewers: davidxl Reviewed By: davidxl Subscribers: mehdi_amini, llvm-commits, eraman Differential Revision: https://reviews.llvm.org/D39028 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317278 91177308-0d34-0410-b5e6-96231b3b80d8		2017-11-02 22:26:51 +00:00
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llvm	Irreducible loop metadata for more accurate block frequency under PGO.	2017-11-02 22:26:51 +00:00
llvm-c	Clean up comments in include/llvm-c/DebugInfo.h	2017-11-02 21:35:37 +00:00