commit	66d9a752b9c4c7de32f21f921d1678799a254259	[log] [tgz]
author	Alex Bradbury <asb@lowrisc.org>	Thu Nov 29 20:43:42 2018 +0000
committer	Alex Bradbury <asb@lowrisc.org>	Thu Nov 29 20:43:42 2018 +0000
tree	883e834f03d6c63309867b074bdb2658180989b9
parent	7eb1c2864fb3b3482432bb979f40c740ca99f023 [diff]

[RISCV] Implement codegen for cmpxchg on RV32IA

Utilise a similar ('late') lowering strategy to D47882. The changes to 
AtomicExpandPass allow this strategy to be utilised by other targets which 
implement shouldExpandAtomicCmpXchgInIR.

All cmpxchg are lowered as 'strong' currently and failure ordering is ignored. 
This is conservative but correct.

Differential Revision: https://reviews.llvm.org/D48131

llvm-svn: 347914

llvm/include/llvm/IR/IntrinsicsRISCV.td[diff]
llvm/lib/CodeGen/AtomicExpandPass.cpp[diff]
llvm/lib/Target/RISCV/RISCVExpandPseudoInsts.cpp[diff]
llvm/lib/Target/RISCV/RISCVISelLowering.cpp[diff]
llvm/lib/Target/RISCV/RISCVISelLowering.h[diff]
llvm/lib/Target/RISCV/RISCVInstrInfoA.td[diff]
llvm/test/CodeGen/RISCV/atomic-cmpxchg.ll[diff]

7 files changed

tree: 883e834f03d6c63309867b074bdb2658180989b9

clang/
clang-tools-extra/
compiler-rt/
debuginfo-tests/
libclc/
libcxx/
libcxxabi/
libunwind/
lld/
lldb/
llgo/
llvm/
openmp/
parallel-libs/
polly/
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.