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LLVM backend for 6502
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1726e2ff15
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Andrea Di Biagio 1726e2ff15 [X86] Add two combine rules to simplify dag nodes introduced during type legalization when promoting nodes with illegal vector type. 
This patch teaches the backend how to simplify/canonicalize dag node
sequences normally introduced by the backend when promoting certain dag nodes
with illegal vector type.

This patch adds two new combine rules:
1) fold (shuffle (bitcast (BINOP A, B)), Undef, <Mask>) ->
        (shuffle (BINOP (bitcast A), (bitcast B)), Undef, <Mask>)

2) fold (BINOP (shuffle (A, Undef, <Mask>)), (shuffle (B, Undef, <Mask>))) ->
        (shuffle (BINOP A, B), Undef, <Mask>).

Both rules are only triggered on the type-legalized DAG.
In particular, rule 1. is a target specific combine rule that attempts
to sink a bitconvert into the operands of a binary operation.
Rule 2. is a target independet rule that attempts to move a shuffle
immediately after a binary operation.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209930 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-30 23:17:53 +00:00
autoconf Don't hard-code ld when extracting host linker version, use ${LD} if 2014-05-28 15:12:55 +00:00
bindings [OCaml] Add an ocamlfind package llvm.all_backends. 2014-05-01 21:00:52 +00:00
cmake AArch64/ARM64: move ARM64 into AArch64's place 2014-05-24 12:50:23 +00:00
docs fixed more typos 2014-05-30 21:18:13 +00:00
examples Try to fix the msvc build. 2014-04-29 23:37:02 +00:00
include MachO: support N_INDR aliases in assembly files. 2014-05-30 13:22:59 +00:00
lib [X86] Add two combine rules to simplify dag nodes introduced during type legalization when promoting nodes with illegal vector type. 2014-05-30 23:17:53 +00:00
projects
test [X86] Add two combine rules to simplify dag nodes introduced during type legalization when promoting nodes with illegal vector type. 2014-05-30 23:17:53 +00:00
tools MachO: support N_INDR aliases in assembly files. 2014-05-30 13:22:59 +00:00
unittests Use std::unique_ptr instead of OwningPtr in the MemoryBuffer unittests. 2014-05-18 21:01:46 +00:00
utils utils: Teach lldbDataFormatters to load automatically 2014-05-28 05:45:17 +00:00
.arcconfig
.clang-format
.gitignore
CMakeLists.txt AArch64/ARM64: move ARM64 into AArch64's place 2014-05-24 12:50:23 +00:00
CODE_OWNERS.TXT
configure Don't hard-code ld when extracting host linker version, use ${LD} if 2014-05-28 15:12:55 +00:00
CREDITS.TXT Update Credits. 2014-05-29 19:59:58 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in
Makefile.rules autoconf: Fix libLLVM-Major-Minor-Patch.so symlink 2014-05-15 19:50:25 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

README.txt 

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