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The red zone consists of 128 bytes beyond the stack pointer so that the allocation of objects in leaf functions doesn't require decrementing rsp. In r255656, we introduced an optimization that would cheaply materialize certain constants via push/pop. Push decrements the stack pointer and stores it's result at what is now the top of the stack. However, this means that using push/pop would encroach on the red zone. PR26023 gives an example where this corrupts an object in the red zone. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256808 91177308-0d34-0410-b5e6-96231b3b80d8 |
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bindings | ||
cmake | ||
docs | ||
examples | ||
include | ||
lib | ||
projects | ||
resources | ||
test | ||
tools | ||
unittests | ||
utils | ||
.arcconfig | ||
.clang-format | ||
.clang-tidy | ||
.gitignore | ||
CMakeLists.txt | ||
CODE_OWNERS.TXT | ||
configure | ||
CREDITS.TXT | ||
LICENSE.TXT | ||
llvm.spec.in | ||
LLVMBuild.txt | ||
Makefile | ||
Makefile.common | ||
Makefile.config.in | ||
Makefile.rules | ||
README.txt |
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. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you are writing a package for LLVM, see docs/Packaging.rst for our suggestions.