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Matthew Simpson 440296ff6f [AArch64] Change order of candidate FMLS patterns 
r319980 added new patterns to the machine combiner for transforming (fsub (fmul
x y) z) into (fmla (fneg z) x y). That is, fsub's where the first source
operand is an fmul are transformed. We previously only matched the case where
the second source operand of an fsub was an fmul, transforming (fsub z (fmul x
y)) into (fmls z x y). Now, if we have an fsub where both source operands are
fmuls, both of the above patterns are applicable.

However, the order in which we add the patterns to the list of candidates
determines the transformation that takes place, since only the first pattern
that matches will be used. This patch changes the order these two patterns are
added to the list of candidates such that we prefer the case where the second
source operand is an fmul (the fmls case), rather than the other one (the
fmla/fneg case). When both source operands are fmuls, this ordering results in
fewer instructions.

Differential Revision: https://reviews.llvm.org/D41587

llvm-svn: 321491
2017-12-27 15:25:01 +00:00
bindings Update go bindings to use new functions from rL317135. 2017-11-02 10:22:26 +00:00
cmake [cmake] Always respect existing CMAKE_REQUIRED_FLAGS when adding additional ones. 2017-12-25 01:23:09 +00:00
docs [docs] Use dbgs() instead of errs() for DEBUG() 2017-12-25 14:16:07 +00:00
examples PR35705: Fix Chapter 9 example code for API changes to DIBuilder 2017-12-20 19:36:54 +00:00
include [NFC] Extract out a helper function for SimplifyCall(CS, Q) 2017-12-27 00:16:12 +00:00
lib [AArch64] Change order of candidate FMLS patterns 2017-12-27 15:25:01 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [runtimes] Add install-*-stripped targets 2017-12-08 19:42:46 +00:00
test [AArch64] Change order of candidate FMLS patterns 2017-12-27 15:25:01 +00:00
tools [llvm-readobj] Fix ambiguous call to the printNumber 2017-12-21 10:46:20 +00:00
unittests [SCEV] Be careful with nuw/nsw/exact in InsertBinop 2017-12-27 08:26:22 +00:00
utils [git-llvm] Handle files ignored by svn correctly 2017-12-22 21:19:13 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitattributes [MC] Fix regression tests on Windows when git “core.autocrlf” is set to true. 2017-11-17 21:59:43 +00:00
.gitignore
CMakeLists.txt [cmake] Update experimental target error message 2017-12-18 19:15:15 +00:00
CODE_OWNERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00
configure
CREDITS.TXT Add myself to CREDITS.txt 2017-09-18 14:33:39 +00:00
LICENSE.TXT
llvm.spec.in
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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