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Hiroshi Yamauchi dce9def3dd 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

llvm-svn: 317278
 		2017-11-02 22:26:51 +00:00
clang Modular Codegen: Don't home/modularize static functions in headers 2017-11-02 21:55:40 +00:00
clang-tools-extra Update release notes (check SVN commit-after-approval access) 2017-11-02 20:00:17 +00:00
compiler-rt [fuzzer] Fix nested mallocs 2017-11-02 04:12:10 +00:00
debuginfo-tests Revert r313600 due to bot failures on Green Dragon. 2017-09-19 14:51:37 +00:00
libclc tgamma: Use unary_decl instead of custom inc file 2017-11-02 19:49:00 +00:00
libcxx Change a bunch of comments from C++1z to C++17. NFC 2017-11-02 15:03:25 +00:00
libcxxabi Fix ASAN build with older compiler-rt versions. 2017-09-14 22:37:34 +00:00
libunwind Fix building for ARM with dwarf exception handling 2017-11-02 08:16:16 +00:00
lld [ELF] - Cleanup of processSectionCommands(). 2017-11-01 08:40:28 +00:00
lldb Remove getCategories mechanism of specifying test categories 2017-11-02 22:13:09 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm Irreducible loop metadata for more accurate block frequency under PGO. 2017-11-02 22:26:51 +00:00
openmp [libomptarget] Remove stale omp handle 2017-11-02 15:59:51 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [ZoneAlgo/ForwardOpTree] Normalize PHIs to their known incoming values. 2017-10-31 16:11:46 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.