forked from OSchip/llvm-project
8f623f4ab0
Without SVE, after a dynamic stack allocation has modified the SP, it is presumed that a frame pointer restoration will revert the SP back to it's correct value prior to any caller stack being restored. However the SVE frame is restored using the stack pointer directly, as it is located after the frame pointer. This means that in the presence of a dynamic stack allocation, any SVE callee state gets corrupted as SP has the incorrect value when the SVE state is restored. To address this issue, when variable sized objects and SVE CSRs are present, treat the stack as having been realigned, hence restoring the stack pointer from the frame pointerr prior to restoring the SVE state. Differential Revision: https://reviews.llvm.org/D124615 |
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README.txt
The LLVM Compiler Infrastructure ================================ 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.