cb7912cc0f
Summary: I think there might be something to optimize in `atomic_store`. Currently, if everything goes well (and we have a different new value), we always iterate 3 times. For example, `with a = 0`, `oldval = a`, `newval = 42`, we get: ``` oldval = 0, newval = 42, curval = 0 oldval = 0, newval = 42, curval = 42 oldval = 42, newval = 42, curval = 42 ``` and then it breaks. Unless I am not seeing something, I don't see a point to the third iteration. If the current value is the one we want, we should just break. This means that 2 iterations (with a different newval) should be sufficient to achieve what we want. Reviewers: dvyukov, alekseyshl Reviewed By: dvyukov Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits Differential Revision: https://reviews.llvm.org/D46597 llvm-svn: 331890 |
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| clang | ||
| clang-tools-extra | ||
| compiler-rt | ||
| debuginfo-tests | ||
| libclc | ||
| libcxx | ||
| libcxxabi | ||
| libunwind | ||
| lld | ||
| lldb | ||
| llgo | ||
| llvm | ||
| openmp | ||
| parallel-libs | ||
| polly | ||
| README.md | ||
README.md
Low Level Virtual Machine (LLVM)
This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.