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LLVM backend for 6502
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1241b83d61
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Jingyue Wu 1241b83d61 [NVPTX] enable SpeculativeExecution in NVPTX 
Summary:
SpeculativeExecution enables a series straight line optimizations (such
as SLSR and NaryReassociate) on conditional code. For example,

  if (...)
    ... b * s ...
  if (...)
    ... (b + 1) * s ...

speculative execution can hoist b * s and (b + 1) * s from then-blocks,
so that we have

  ... b * s ...
  if (...)
    ...
  ... (b + 1) * s ...
  if (...)
    ...

Then, SLSR can rewrite (b + 1) * s to (b * s + s) because after
speculative execution b * s dominates (b + 1) * s.

The performance impact of this change is significant. It speeds up the
benchmarks running EigenFloatContractionKernelInternal16x16
(ba68f42fa6/unsupported/Eigen/CXX11/src/Tensor/TensorContractionCuda.h (cl-526))
by roughly 2%. Some internal benchmarks that have the above code pattern
are improved by up to 40%. No significant slowdowns are observed on
Eigen CUDA microbenchmarks.

Reviewers: jholewinski, broune, eliben

Subscribers: llvm-commits, jholewinski

Differential Revision: http://reviews.llvm.org/D11201

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242437 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-16 20:13:48 +00:00
autoconf Update the trunk version to 3.8.0svn. 2015-07-14 22:35:57 +00:00
bindings Revert "Update LLVM bindings after r239940. ..." 2015-07-16 01:16:39 +00:00
cmake [CMake] Unbreak add_llvm_external_project when external projects are specified. 2015-07-14 05:12:53 +00:00
docs [Codegen] Add intrinsics 'absdiff' and corresponding SDNodes for absolute difference operation 2015-07-16 15:22:46 +00:00
examples Fix Kaleidoscope tuto: ExecutionEngine->getDataLayout() returns a ref 2015-07-16 16:47:18 +00:00
include LiveInterval: Document and enforce rules about empty subranges. 2015-07-16 18:55:35 +00:00
lib [NVPTX] enable SpeculativeExecution in NVPTX 2015-07-16 20:13:48 +00:00
projects build: make libunwind a proper project 2015-04-25 01:47:39 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
test [NVPTX] enable SpeculativeExecution in NVPTX 2015-07-16 20:13:48 +00:00
tools Delete an unused function. 2015-07-16 18:41:41 +00:00
unittests [ExecutionEngine] Re-apply r241962 with fixes for ARM. 2015-07-14 22:11:10 +00:00
utils Move most user of TargetMachine::getDataLayout to the Module one 2015-07-16 06:11:10 +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 Minor updates to gitignore so that symlinks are ignored in the projects dir. 2015-07-07 20:24:58 +00:00
CMakeLists.txt Update the trunk version to 3.8.0svn. 2015-07-14 22:35:57 +00:00
CODE_OWNERS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
configure Update the trunk version to 3.8.0svn. 2015-07-14 22:35:57 +00:00
CREDITS.TXT [WebAssembly] Initial WebAssembly backend 2015-06-29 23:51:55 +00:00
LICENSE.TXT Update for a new year. 2015-03-12 01:25:29 +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 Disallow in-source builds (as we already do for the cmake build). 2015-07-01 18:09:21 +00:00
Makefile.rules Add support for SunOS function/data sections and associated 2015-03-03 20:54:29 +00:00
README.txt Revert test commit at revision 233535. 2015-03-30 12:39:03 +00:00

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