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LLVM backend for 6502
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98726c311b
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Evgeniy Stepanov 98726c311b [LICM] Don't create more than one copy of an instruction per loop exit block when sinking. 
Fixes exponential compilation complexity in PR19835, caused by
LICM::sink not handling the following pattern well:

f = op g
e = op f, g
d = op e
c = op d, e
b = op c
a = op b, c

When an instruction with N uses is sunk, each of its operands gets N
new uses (all of them - phi nodes). In the example above, if a had 1
use, c would have 2, e would have 4, and g would have 8.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211673 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-25 07:54:58 +00:00
autoconf
bindings
cmake
docs Revert r211287, "Remove support for LLVM runtime multi-threading." 2014-06-24 13:36:31 +00:00
examples
include Move some trivial methods up to MCStreamer. 2014-06-25 00:27:53 +00:00
lib [LICM] Don't create more than one copy of an instruction per loop exit block when sinking. 2014-06-25 07:54:58 +00:00
projects
test [LICM] Don't create more than one copy of an instruction per loop exit block when sinking. 2014-06-25 07:54:58 +00:00
tools Pass a unique_ptr<MemoryBuffer> to the constructors in the Binary hierarchy. 2014-06-24 13:56:32 +00:00
unittests Revert r211287, "Remove support for LLVM runtime multi-threading." 2014-06-24 13:36:31 +00:00
utils Use SourceMgr::getMemoryBuffer() in a couple of places 2014-06-25 00:41:15 +00:00
.arcconfig
.clang-format
.gitignore
CMakeLists.txt Delete utils/FileUpdate. 2014-06-23 17:58:39 +00:00
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