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LLVM backend for 6502
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e9c0b5aba6
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Andrea Di Biagio e9c0b5aba6 [DAGCombiner] Teach how to fold sext/aext/zext of constant build vectors. 
This patch teaches the DAGCombiner how to fold a sext/aext/zext dag node when
the operand in input is a build vector of constants (or UNDEFs).

The inability to fold a sext/zext of a constant build_vector was the root
cause of some pcg bugs affecting vselect expansion on x86-64 with AVX support.

Before this change, the DAGCombiner only knew how to fold a sext/zext/aext of a
ConstantSDNode.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200234 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-27 18:45:30 +00:00
autoconf Use a heavier hammer when --enable-libcpp is passed to bypass the tests 2014-01-15 21:21:48 +00:00
bindings
cmake [CMake] Put *_exports into "Misc" folder. 2014-01-27 17:39:38 +00:00
docs Updating the getting started guide for Visual Studio a smidge. 2014-01-23 20:46:44 +00:00
examples
include Silence MSVC warning on 'uint16_t |= bool' with a cast 2014-01-27 17:47:11 +00:00
lib [DAGCombiner] Teach how to fold sext/aext/zext of constant build vectors. 2014-01-27 18:45:30 +00:00
projects llvm/projects/CMakeLists.txt: Add dragonegg. 2014-01-24 12:53:08 +00:00
test [DAGCombiner] Teach how to fold sext/aext/zext of constant build vectors. 2014-01-27 18:45:30 +00:00
tools Do not reference llvm-gcc from bugpoint 2014-01-27 13:44:58 +00:00
unittests Roll back the ConstStringRef change for now 2014-01-27 05:24:39 +00:00
utils Don't use EnforceSmallerThan for EnforceVectorSubVectorTypeIs. EnforceSmallerThan doesn't handle vectors quite right and should really enforce that vectors have the same number of elements. Add explicit checks for vector element count differing in EnforceVectorSubVectorTypeIs instead. This removes some unnecessary type checks in X86GenDAGISel.inc. 2014-01-25 17:40:33 +00:00
.arcconfig
.clang-format
.gitignore Added .DS_Store entry in .gitignore for ignoring .DS_Store files in the source 2014-01-25 15:15:16 +00:00
CMakeLists.txt [CMake] Introduce new scheme of LLVM_TOOLS_BINARY_DIR and LLVM_LIBRARY_DIR 2014-01-19 12:52:10 +00:00
CODE_OWNERS.TXT
configure Use a heavier hammer when --enable-libcpp is passed to bypass the tests 2014-01-15 21:21:48 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile Fix bad variable syntax in r199413 2014-01-17 00:40:39 +00:00
Makefile.common
Makefile.config.in
Makefile.rules
README.txt

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