f9193f3b18
This patch introduces a new option `-preserve-merged-debug-info` to preserve an arbitrary but deterministic version of debug information when DILocations are merged. This is intended to be used in production environments from which sample based profiles are derived such as AutoFDO and MemProf. With this patch we have see a 0.2% improvement on an internal workload at Google when generating AutoFDO profiles. It also significantly improves the ability for MemProf by preserving debug info for merged call instructions used in the contextual profile. --------- Co-authored-by: Krzysztof Pszeniczny <kpszeniczny@google.com>
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.
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