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LLVM backend for 6502
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Dan Gohman 43873d4f73 Use range metadata instead of introducing selects. 
When GlobalOpt has determined that a GlobalVariable only ever has two values,
it would convert the GlobalVariable to a boolean, and introduce SelectInsts
at every load, to choose between the two possible values. These SelectInsts
introduce overhead and other unpleasantness.

This patch makes GlobalOpt just add range metadata to loads from such
GlobalVariables instead. This enables the same main optimization (as seen in
test/Transforms/GlobalOpt/integer-bool.ll), without introducing selects.

The main downside is that it doesn't get the memory savings of shrinking such
GlobalVariables, but this is expected to be negligible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204076 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-17 19:57:04 +00:00
autoconf Remove projects/sample. 2014-03-12 22:40:22 +00:00
bindings
cmake [CMake][cygming] Disable --out-implib from executables. 2014-03-16 13:51:24 +00:00
docs [docs] Add links to XMOS XCore documentation. 2014-03-14 15:53:50 +00:00
examples Fix warnings about an variable only used in asserts. 2014-03-06 06:35:46 +00:00
include Really REALLY finish adding const to the MachineRegisterInfo iterator range methods. 2014-03-17 19:34:51 +00:00
lib Use range metadata instead of introducing selects. 2014-03-17 19:57:04 +00:00
projects Remove projects/sample. 2014-03-12 22:40:22 +00:00
test Use range metadata instead of introducing selects. 2014-03-17 19:57:04 +00:00
tools [C++11] Introduce ObjectFile::symbols() to use range-based loops. 2014-03-17 07:28:19 +00:00
unittests [PM] As was pointed out in review, I need to define a custom swap in 2014-03-13 10:42:18 +00:00
utils Replace ValueTypes.h with MachineValueType.h if possible. 2014-03-15 09:11:41 +00:00
.arcconfig
.clang-format
.gitignore Remove projects/sample. 2014-03-12 22:40:22 +00:00
CMakeLists.txt static link polly into tools 2014-03-14 04:04:14 +00:00
CODE_OWNERS.TXT Update my e-mail address in CODE_OWNERS.TXT 2014-03-13 18:04:41 +00:00
configure Remove projects/sample. 2014-03-12 22:40:22 +00:00
CREDITS.TXT
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Add a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
Makefile.rules Use -std=gnu++11 on cygwin and mingw. 2014-03-12 20:01:15 +00:00
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