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LLVM backend for 6502
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19e39c6f12
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Andrea Di Biagio 19e39c6f12 [DAGCombiner] Improve the shuffle-vector folding logic. 
Canonicalize shuffles according to rules:
 *  shuffle(A, shuffle(A, B)) -> shuffle(shuffle(A,B), A)
 *  shuffle(B, shuffle(A, B)) -> shuffle(shuffle(A,B), B)
 *  shuffle(B, shuffle(A, Undef)) -> shuffle(shuffle(A, Undef), B)

This patch helps identifying more shuffle pairs that could be combined reusing
the already existing rules in the DAGCombiner.

Added new test 'combine-vec-shuffle-5.ll' to verify that the canonicalized
shuffles are now folded into a single shuffle node by the DAGCombiner.
Added more test cases to 'combine-vec-shuffle-4.ll'.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213504 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-21 07:30:54 +00:00
autoconf Drop the udis86 wrapper from llvm::sys 2014-07-17 20:05:29 +00:00
bindings MergedLoadStoreMotion pass 2014-07-18 19:13:09 +00:00
cmake CMake: avoid a reconfigure loop from r213091 2014-07-15 22:11:54 +00:00
docs [C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges. 2014-07-20 09:10:11 +00:00
examples [CMake] Update libdeps. 2014-07-14 05:01:53 +00:00
include [DAG] Refactor some logic. No functional change. 2014-07-21 07:28:51 +00:00
lib [DAGCombiner] Improve the shuffle-vector folding logic. 2014-07-21 07:30:54 +00:00
projects
test [DAGCombiner] Improve the shuffle-vector folding logic. 2014-07-21 07:30:54 +00:00
tools [C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges. 2014-07-20 09:10:11 +00:00
unittests unittests: Actually test reverse iterators in Path tests 2014-07-16 08:18:58 +00:00
utils Remove uses of the redundant ".reset(nullptr)" of unique_ptr, in favor of ".reset()" 2014-07-19 01:05:11 +00:00
.arcconfig
.clang-format
.gitignore Add Polly to the ignored trees. 2014-06-25 13:13:36 +00:00
CMakeLists.txt [CMake] Introduce LLVM_SHLIB_OUTPUT_INTDIR. 2014-07-04 04:23:26 +00:00
CODE_OWNERS.TXT Make myself code owner of MCJIT. 2014-07-17 20:23:31 +00:00
configure
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Track clang r213171 2014-07-16 16:50:34 +00:00
Makefile.rules [Make] Fix dependencies for td.expanded 2014-06-20 19:00:41 +00:00
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