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84f0cdcd15
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Jatin Bhateja 84f0cdcd15 [X86] Improvement in CodeGen instruction selection for LEAs (re-applying post required revision changes.) 
Summary:
   1/  Operand folding during complex pattern matching for LEAs has been
       extended, such that it promotes Scale to accommodate similar operand
       appearing in the DAG.
       e.g.
         T1 = A + B
         T2 = T1 + 10
         T3 = T2 + A
       For above DAG rooted at T3, X86AddressMode will no look like
         Base = B , Index = A , Scale = 2 , Disp = 10

   2/  During OptimizeLEAPass down the pipeline factorization is now performed over LEAs
       so that if there is an opportunity then complex LEAs (having 3 operands)
       could be factored out.
       e.g.
         leal 1(%rax,%rcx,1), %rdx
         leal 1(%rax,%rcx,2), %rcx
       will be factored as following
         leal 1(%rax,%rcx,1), %rdx
         leal (%rdx,%rcx)   , %edx

   3/ Aggressive operand folding for AM based selection for LEAs is sensitive to loops,
      thus avoiding creation of any complex LEAs within a loop.

Reviewers: lsaba, RKSimon, craig.topper, qcolombet, jmolloy

Reviewed By: lsaba

Subscribers: jmolloy, spatel, igorb, llvm-commits

    Differential Revision: https://reviews.llvm.org/D35014

llvm-svn: 314886
2017-10-04 09:02:10 +00:00
bindings Update the Go bindings for r309426 (remove offset from llvm.dbg.value) 2017-07-28 22:44:44 +00:00
cmake Use sched_getaffinity instead of std:🧵:hardware_concurrency. 2017-10-03 16:25:15 +00:00
docs Add a manpage for llvm-dwarfdump. 2017-10-03 23:46:57 +00:00
examples Fix broken links to the Itanium CXX ABI 2017-09-12 00:19:11 +00:00
include [X86] Improvement in CodeGen instruction selection for LEAs (re-applying post required revision changes.) 2017-10-04 09:02:10 +00:00
lib [X86] Improvement in CodeGen instruction selection for LEAs (re-applying post required revision changes.) 2017-10-04 09:02:10 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +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][runtimes] Use the same configuration for non-target and "default" target 2017-09-08 22:26:50 +00:00
test [X86] Improvement in CodeGen instruction selection for LEAs (re-applying post required revision changes.) 2017-10-04 09:02:10 +00:00
tools [llvm-cov] Fix showing title when filtering and not outputting to a directory 2017-10-04 08:54:37 +00:00
unittests Move the stripping of invalid debug info from the Verifier to AutoUpgrade. 2017-10-02 18:31:29 +00:00
utils [AsmParser] Add DiagnosticString to AsmOperands in tablegen 2017-10-03 14:34:57 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt Revert "[CMake] Remove CMAKE_.*_OUTPUT_DIRECTORY (NFCI)" 2017-09-29 19:50:41 +00:00
CODE_OWNERS.TXT [ARC] Add ARC backend. 2017-08-24 15:40:33 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Add myself to CREDITS.txt 2017-09-18 14:33:39 +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 [RelTest] Diana is doing both releases now 2017-07-14 08:33:52 +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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