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LLVM backend for 6502
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541681c848
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Weiming Zhao 541681c848 Fix PR 17368: disable vector mul distribution for square of add/sub for ARM 
Generally, it is desirable to distribute (a + b) * c to a*c + b*c for
ARM with VMLx forwarding, where a, b and c are vectors.
However, for (a + b)*(a + b), distribution will result in one extra
instruction.
With distribution:
  x = a + b (add)
  y = a * x (mul)
  z = y + b * y (mla)

Without distribution:
  x = a + b (add)
  z = x * x (mul)

This patch checks if a mul is a square of add/sub. If yes, skip
distribution.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191410 91177308-0d34-0410-b5e6-96231b3b80d8
2013-09-25 23:12:06 +00:00
autoconf Remove error output from configure if CFLAGS is set (r174313). 2013-09-24 11:38:45 +00:00
bindings [python-bindings] Added support for getting/setting operands of values and getting the number of operands of a value. 2013-09-11 01:38:12 +00:00
cmake [CMake] Hack GetSVN.cmake to handle unusual terminals. 2013-09-16 21:38:01 +00:00
docs Add a paragraph on prefix data layout. 2013-09-23 20:14:21 +00:00
examples ExceptionDemo.cpp: Tweak a @param. [-Wdocumentation] 2013-07-29 11:03:50 +00:00
include Dump the normal dwarf pubtypes section as well. 2013-09-25 23:02:41 +00:00
lib Fix PR 17368: disable vector mul distribution for square of add/sub for ARM 2013-09-25 23:12:06 +00:00
projects Port the detection of zlib from the main autoconf system to the sample 2013-08-18 01:55:15 +00:00
runtime Bring back the build of libprofile_rt on Sparc. It is now working correctly. See: 2013-09-08 09:15:09 +00:00
test Fix PR 17368: disable vector mul distribution for square of add/sub for ARM 2013-09-25 23:12:06 +00:00
tools Add gnu pubsections as options to llvm-dwarfdump. 2013-09-25 23:02:44 +00:00
unittests Fixed typo in CreateProcessTrailingSlash test 2013-09-20 18:21:59 +00:00
utils Mark the x86 machine model as incomplete. PR17367. 2013-09-25 18:14:12 +00:00
.arcconfig Add .arcconfig to the repository. Useful if someone wants to use phabricator's command line tool. 2012-12-01 12:07:58 +00:00
.clang-format Add a clang-format file so that the tool can automatically detect the 2013-09-02 07:19:04 +00:00
.gitignore Add extra vim swap file pattern 2012-10-09 23:48:34 +00:00
CMakeLists.txt Set the minimal stack size with msvc when using cmake >= 2.8.11. 2013-09-25 14:06:55 +00:00
CODE_OWNERS.TXT Add more owners to CODE_OWNERS.TXT (Kostya Serebryany: AddressSanitizer and ThreadSanitizer; Evgeniy Stepanov: MemorySanitizer) 2013-06-27 08:47:12 +00:00
configure Remove error output from configure if CFLAGS is set (r174313). 2013-09-24 11:38:45 +00:00
CREDITS.TXT Test commit. 2013-08-16 18:09:06 +00:00
LICENSE.TXT Be more specific and capitalize filenames. 2013-05-21 21:22:34 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile Fix regular expression used by 'make update' to only look for 'I' and '?' at the start of svn info results and to check for spaces after 'I' instead of just after '?'. 2013-07-03 14:48:37 +00:00
Makefile.common Makefile.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
Makefile.config.in Add an autoconf option for turning on -gsplit-dwarf by default 2013-06-25 01:12:25 +00:00
Makefile.rules Makefile.rules: Avoid -fomit-frame-pointer also on cygwin due to PR14646. 2013-08-18 03:38:40 +00:00
README.txt test 2013-04-17 05:34:03 +00:00

README.txt 

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