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LLVM backend for 6502
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Bruno Cardoso Lopes 807360ab08 [x86] Combine x86mmx/i64 to v2i64 conversion to use scalar_to_vector 
Handle the poor codegen for i64/x86xmm->v2i64 (%mm -> %xmm) moves. Instead of
using stack store/load pair to do the job, use scalar_to_vector directly, which
in the MMX case can use movq2dq. This was the current behavior prior to
improvements for vector legalization of extloads in r213897.

This commit fixes the regression and as a side-effect also remove some
unnecessary shuffles.

In the new attached testcase, we go from:

pshufw  $-18, (%rdi), %mm0
movq    %mm0, -8(%rsp)
movq    -8(%rsp), %xmm0
pshufd  $-44, %xmm0, %xmm0
movd    %xmm0, %eax
...

To:

pshufw  $-18, (%rdi), %mm0
movq2dq %mm0, %xmm0
movd    %xmm0, %eax
...

Differential Revision: http://reviews.llvm.org/D7126
rdar://problem/19413324

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226953 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-23 22:44:16 +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 lit: Make MCJIT's supported arch check case insensitive 2015-01-23 21:11:40 +00:00
docs Intrinsics: introduce llvm_any_ty aka ValueType Any 2015-01-22 20:14:38 +00:00
examples Reorder. 2015-01-19 00:35:33 +00:00
include llvm-cov: clang-format the GCOV files (NFC) 2015-01-23 22:38:01 +00:00
lib [x86] Combine x86mmx/i64 to v2i64 conversion to use scalar_to_vector 2015-01-23 22:44:16 +00:00
projects [cmake] Use the external project machinery for libcxxabi so that it can 2014-07-25 10:27:40 +00:00
test [x86] Combine x86mmx/i64 to v2i64 conversion to use scalar_to_vector 2015-01-23 22:44:16 +00:00
tools [Orc] New JIT APIs. 2015-01-23 21:25:00 +00:00
unittests [ADT] Add move operations to SmallVector<T,N> from SmallVectorImpl<T>. 2015-01-23 06:25:17 +00:00
utils [emacs] llvm-mode: fix parens, font-lock i* 2015-01-23 19:45:35 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.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 Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
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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