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Michael Kuperstein a52ddfa930 [DAGCombine] Produce better code for constant splats 
This solves PR22276.
Splats of constants would sometimes produce redundant shuffles, sometimes ridiculously so (see the PR for details). Fold these shuffles into BUILD_VECTORs early on instead.

Differential Revision: http://reviews.llvm.org/D7093

Fixed recommit of r226811.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226816 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-22 13:07:28 +00:00
autoconf Trunk is now 3.7.0svn 2015-01-14 17:38:03 +00:00
bindings IR: Return unique_ptr from MDNode::getTemporary() 2015-01-19 21:30:18 +00:00
cmake Don't pass -Wl,z,defs for now. 2015-01-20 22:08:20 +00:00
docs Explicitly describe '///' versus '//' comment delimiters. 2015-01-22 00:19:56 +00:00
examples Reorder. 2015-01-19 00:35:33 +00:00
include Fixed a bug in type legalizer for masked load/store intrinsics. 2015-01-22 12:07:59 +00:00
lib [DAGCombine] Produce better code for constant splats 2015-01-22 13:07:28 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test [DAGCombine] Produce better code for constant splats 2015-01-22 13:07:28 +00:00
tools Assigning and copying command line option objects shouldn't be allowed. 2015-01-22 01:49:59 +00:00
unittests Adding a new cl::HideUnrelatedOptions API to allow clang to migrate off cl::getRegisteredOptions. 2015-01-21 22:45:52 +00:00
utils [lit] Format JSONMetricValue strings better. 2015-01-21 16:38:31 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format
.clang-tidy Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore .gitignore: add some rules for tagging programs 2015-01-10 19:11:29 +00:00
CMakeLists.txt Trunk is now 3.7.0svn 2015-01-14 17:38:03 +00:00
CODE_OWNERS.TXT Add myself as SystemZ code owner 2014-12-18 19:27:50 +00:00
configure Trunk is now 3.7.0svn 2015-01-14 17:38:03 +00:00
CREDITS.TXT Rise from the dead and update personal info 2014-08-25 17:51:04 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common
Makefile.config.in Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
Makefile.rules Add a check for misbehaving -Wcomment from gcc-4.7 and add 2014-11-05 00:35:15 +00:00
README.txt Check commit access 2015-01-16 19:23:34 +00:00

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