forked from OSchip/llvm-project
d58f112ce0
FEntryInserter prepends FENTRY_CALL to the first basic block. In case there are other instructions, PostRA Machine Instruction Scheduler can move FENTRY_CALL call around. This actually occurs on SystemZ (see the testcase). This is bad for the following reasons: * FENTRY_CALL clobbers registers. * Linux Kernel depends on whatever FENTRY_CALL expands to to be the very first instruction in the function. Fix by adding isCall attribute to FENTRY_CALL, which prevents reordering by making it a scheduling boundary for PostRA Machine Instruction Scheduler. Reviewed By: niravd Differential Revision: https://reviews.llvm.org/D91218 |
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| llvm.spec.in | ||
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.