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Sean Eveson a6bcd53d52 [MC] Function stack size section. 
Re applying after fixing issues in the diff, sorry for any painful conflicts/merges!

Original RFC: http://lists.llvm.org/pipermail/llvm-dev/2017-August/117028.html

This change adds a '.stack-size' section containing metadata on function stack sizes to output ELF files behind the new -stack-size-section flag. The section contains pairs of function symbol references (8 byte) and stack sizes (unsigned LEB128).

The contents of this section can be used to measure changes to stack sizes between different versions of the compiler or a source base. The advantage of having a section is that we can extract this information when examining binaries that we didn't build, and it allows users and tools easy access to that information just by referencing the binary.

There is a follow up change to add an option to clang.

Thanks.

Reviewers: hfinkel, MatzeB

Reviewed By: MatzeB

Subscribers: thegameg, asb, llvm-commits

Differential Revision: https://reviews.llvm.org/D39788

llvm-svn: 319430
 		2017-11-30 13:05:14 +00:00
clang Revert [ARM] disable FPU features when using soft floating point. 2017-11-30 12:05:18 +00:00
clang-tools-extra [Documentation] Sort Clang-tidy changes next way: new modules, new checks, renamed checks, extended checks, new check aliases. 2017-11-29 22:17:39 +00:00
compiler-rt Linux needs to include sys/uio.h for readv, preadv 2017-11-30 09:22:12 +00:00
debuginfo-tests Re-revert "Refactor debuginfo-tests." 2017-11-21 01:20:28 +00:00
libclc configure.py: Add gfx900 (Vega, Raven) 2017-11-27 11:14:06 +00:00
libcxx Fix problems with r'890 when building on machines where sizeof(size_t) != sizeof(unsigned long long) and C++03 2017-11-27 22:27:22 +00:00
libcxxabi Insert padding before the __cxa_exception header to ensure the thrown 2017-11-28 00:36:29 +00:00
libunwind Support building libunwind as a DLL 2017-11-29 08:21:12 +00:00
lld Don't crash on invalid. 2017-11-30 06:18:31 +00:00
lldb Fix assertion in ClangASTContext 2017-11-30 10:16:54 +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 [MC] Function stack size section. 2017-11-30 13:05:14 +00:00
openmp Extension of HWLOC topology discovery with NUMA nodes and tiles 2017-11-30 11:51:47 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly Update format after clang-format change. NFC. 2017-11-30 12:05:48 +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.