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This is especially visible in softfp mode, for example in the implementation of libm fabs/fneg functions. If we have: %1 = vmovdrr r0, r1 %2 = fabs %1 then move the fabs before the vmovdrr: %1 = and r1, #0x7FFFFFFF %2 = vmovdrr r0, r1 This is never a lose, and could be a serious win because the vmovdrr may be followed by a vmovrrd, which would enable us to remove the conversion into FPRs completely. We already do this for f32, but not for f64. Tests are added for both. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246360 91177308-0d34-0410-b5e6-96231b3b80d8 |
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| tools | ||
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| CODE_OWNERS.TXT | ||
| configure | ||
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| LICENSE.TXT | ||
| llvm.spec.in | ||
| LLVMBuild.txt | ||
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| README.txt | ||
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. 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're writing a package for LLVM, see docs/Packaging.rst for our suggestions.