ce2b3ce3b6
Improve profile quality reporting by 1) fixing a format issue for small binaries, 2) adding new stats for exception handling usage, 3) excluding selected blocks when computing the CFG flow conservation score. More specifically for 3), we are excluding blocks that satisfy at least one of the following characteristics: a) is a landing pad, b) has at least one landing pad with non-zero execution counts, c) ends with a recursive call. The reason for a) and b) is because the thrower --> landing pad edges are not explicitly represented in the CFG. The reason for c) is because the call-continuation fallthrough edge count is not important in case of recursive calls. Modified test `bolt/test/X86/profile-quality-reporting.test`. Added test `bolt/test/X86/profile-quality-reporting-small-binary.s`.
The LLVM Compiler Infrastructure
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called "LLVM". This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Getting the Source Code and Building LLVM
Consult the Getting Started with LLVM page for information on building and running LLVM.
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