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Roger Ferrer Ibanez a8d946115e [ARM] Allow the scheduler to clone a node with glue to avoid a copy CPSR ↔ GPR. 
In Thumb 1, with the new ADDCARRY / SUBCARRY the scheduler may need to do
copies CPSR ↔ GPR but not all Thumb1 targets implement them.

The schedule can attempt, before attempting a copy, to clone the instructions
but it does not currently do that for nodes with input glue. In this patch we
introduce a target-hook to let the hook decide if a glued machinenode is still
eligible for copying. In this case these are ARM::tADCS and ARM::tSBCS .

As a follow-up of this change we should actually implement the copies for the
Thumb1 targets that do implement them and restrict the hook to the targets that
can't really do such copy as these clones are not ideal.

This change fixes PR35836.

Differential Revision: https://reviews.llvm.org/D42051

llvm-svn: 323857
2018-01-31 09:23:43 +00:00
bindings [NFC] fix trivial typos in comments and documents 2018-01-26 08:15:29 +00:00
cmake [cmake] Don't build Native llvm-config when cross compiling if passed by user. 2018-01-21 00:29:00 +00:00
docs docs: wordsmith some of the linker option extension 2018-01-31 00:16:23 +00:00
examples PR35705: Fix Chapter 9 example code for API changes to DIBuilder 2017-12-20 19:36:54 +00:00
include [ARM] Allow the scheduler to clone a node with glue to avoid a copy CPSR ↔ GPR. 2018-01-31 09:23:43 +00:00
lib [ARM] Allow the scheduler to clone a node with glue to avoid a copy CPSR ↔ GPR. 2018-01-31 09:23:43 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
runtimes [CMake] Support for cross-compilation when build runtimes 2018-01-08 23:50:59 +00:00
test [ARM] Allow the scheduler to clone a node with glue to avoid a copy CPSR ↔ GPR. 2018-01-31 09:23:43 +00:00
tools llvm-nm should show a symbol type of T for symbols in the (__TEXT_EXEC,__text) section. 2018-01-31 00:00:41 +00:00
unittests [globalisel][legalizer] Fix a fallthrough case in the unittests debug printing 2018-01-29 23:47:41 +00:00
utils [utils] De-duplicate utils/update_{llc_,}test_checks.py 2018-01-30 00:40:05 +00:00
.arcconfig [llvm] Set up .arcconfig to point to Diffusion L repository 2018-01-12 15:37:41 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitattributes [MC] Fix regression tests on Windows when git “core.autocrlf” is set to true. 2017-11-17 21:59:43 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt [CMake] Fix Bug Report URL 2018-01-25 19:16:46 +00:00
CODE_OWNERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Add myself to CREDITS.txt 2018-01-29 17:02:34 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
README.txt Test commit access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
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LLVM is open source software. You may freely distribute it under the terms of
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Please see the documentation provided in docs/ for further
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If you are writing a package for LLVM, see docs/Packaging.rst for our
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