forked from OSchip/llvm-project
e72fe654b7
This enables fshl to be matched earlier on X86 %6 = lshr i32 %3, 1 %7 = select i1 %4, i32 -2147483648, i32 0 %8 = or i32 %6, %7 X86 uses i8 for shift amounts. SelectionDAGBuilder creates the ISD::SRL with an i8 shift type. DAGCombiner turns the select into an ISD::SHL. Prior to this patch it would use i32 for the shift amount. fshl matching failed because the shift amounts have different types. LegalizeDAG fixes the ISD::SHL shift amount to i8. This allowed fshl matching to succeed. With this patch, the ISD::SHL will be created with an i8 shift amount. This allows the fshl to match immediately. No test case beause we still end up with a fshl either way. |
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| .clang-format | ||
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| LICENSE.TXT | ||
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| RELEASE_TESTERS.TXT | ||
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| llvm.spec.in | ||
README.txt
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.