4d20cc21c7
AtomicCmpSwapWithSuccess is legalised into an AtomicCmpSwap plus a comparison. This requires an extension of the value which, by default, is a zero-extension. When we later lower AtomicCmpSwap into a PseudoCmpXchg32 and then expanded in RISCVExpandPseudoInsts.cpp, the lr.w instruction does a sign-extension. This mismatch of extensions causes the comparison to fail when the compared value is negative. This change overrides TargetLowering::getExtendForAtomicOps for RISC-V so it does a sign-extension instead. Differential Revision: https://reviews.llvm.org/D58829 Patch by Ferran Pallarès Roca. llvm-svn: 355869 |
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clang | ||
clang-tools-extra | ||
compiler-rt | ||
debuginfo-tests | ||
libclc | ||
libcxx | ||
libcxxabi | ||
libunwind | ||
lld | ||
lldb | ||
llgo | ||
llvm | ||
openmp | ||
parallel-libs | ||
polly | ||
pstl | ||
.arcconfig | ||
.clang-format | ||
.clang-tidy | ||
README.md |
README.md
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.