forked from OSchip/llvm-project
d897a14c2e
During lowering of memcmp/bcmp, the check for a size of 0 is done in 2 different ways. In rare cases this can lead to a crash in SystemZSelectionDAGInfo::EmitTargetCodeForMemcmp(). The root cause is that SelectionDAGBuilder::visitMemCmpBCmpCall() checks for a constant int value which is not yet evaluated. When the value is turned into a SDValue, then the evaluation is done and results in a ConstantSDNode. But EmitTargetCodeForMemcmp() expects the special case of 0 length to be handled, which results in an assertion. The fix is to turn the value into a SDValue, so that both functions use the same check. Reviewed By: uweigand Differential Revision: https://reviews.llvm.org/D126900 |
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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.