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This is NOOP in x86_64. On arch64 it avoids Data Memory Barrier with visible improvements on micro benchmarks. Reviewed By: dvyukov Differential Revision: https://reviews.llvm.org/D112391
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================