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40a736ff72
We don't need to have the compare output a value and then copy it to FPSW for use by FNSTSW. Instead we can just have the compare output Glue and glue the FNSTSW to it. InstrEmitter effectively performed this optimization when emitting the Machine IR. Doing it directly simplifies the codes and reduces the work in InstrEmitter. There's no change in the machine IR at the end of isel before and after this change. |
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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.