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LLVM backend for 6502
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Juergen Ributzka 4eced19c50 SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. 
The Type Legalizer recognizes that VSELECT needs to be split, because the type
is to wide for the given target. The same does not always apply to SETCC,
because less space is required to encode the result of a comparison. As a result
VSELECT is split and SETCC is unrolled into scalar comparisons.

This commit fixes the issue by checking for VSELECT-SETCC patterns in the DAG
Combiner. If a matching pattern is found, then the result mask of SETCC is
promoted to the expected vector mask type for the given target. This mask has
usually the same size as the VSELECT return type (except for Intel KNL). Now the
type legalizer will split both VSELECT and SETCC.

This allows the following X86 DAG Combine code to sucessfully detect the MIN/MAX
pattern. This fixes PR16695, PR17002, and <rdar://problem/14594431>.

Reviewed by Nadav

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193676 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-30 05:48:18 +00:00
autoconf Update so that it uses the `-V' command line option and supports Python 3.x. 2013-10-12 08:42:59 +00:00
bindings [python-bindings] Added support for getting/setting operands of values and getting the number of operands of a value. 2013-09-11 01:38:12 +00:00
cmake Remove NDBEUG from all release types compile flags. 2013-10-19 07:30:37 +00:00
docs Fix common typos in the docs. 2013-10-29 17:53:27 +00:00
examples Add missing #include's to cctype when using isdigit/alpha/etc. 2013-10-12 00:55:57 +00:00
include Reformat code with clang-format. 2013-10-30 02:25:14 +00:00
lib SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. 2013-10-30 05:48:18 +00:00
projects Revert "Revert "Windows: Add support for unicode command lines"" 2013-10-07 01:00:07 +00:00
test SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. 2013-10-30 05:48:18 +00:00
tools Support names like llvm-ar-3.4 and llvm-ranlib-3.4. 2013-10-29 14:25:43 +00:00
unittests DWARF parser: propery handle DW_FORM_ref_sig8 and fix Windows build. 2013-10-29 16:32:19 +00:00
utils TableGen: remove unused variable. 2013-10-28 18:19:04 +00:00
.arcconfig Add .arcconfig to the repository. Useful if someone wants to use phabricator's command line tool. 2012-12-01 12:07:58 +00:00
.clang-format Add a clang-format file so that the tool can automatically detect the 2013-09-02 07:19:04 +00:00
.gitignore Add extra vim swap file pattern 2012-10-09 23:48:34 +00:00
CMakeLists.txt Remove 2.4 from the list of supported Python versions. 2013-10-28 21:22:23 +00:00
CODE_OWNERS.TXT Add more owners to CODE_OWNERS.TXT (Kostya Serebryany: AddressSanitizer and ThreadSanitizer; Evgeniy Stepanov: MemorySanitizer) 2013-06-27 08:47:12 +00:00
configure Update so that it uses the `-V' command line option and supports Python 3.x. 2013-10-12 08:42:59 +00:00
CREDITS.TXT Update. 2013-09-27 20:40:40 +00:00
LICENSE.TXT Be more specific and capitalize filenames. 2013-05-21 21:22:34 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile.common Makefile.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
Makefile.config.in Add an autoconf option for turning on -gsplit-dwarf by default 2013-06-25 01:12:25 +00:00
Makefile.rules Makefile.rules: Avoid -fomit-frame-pointer also on cygwin due to PR14646. 2013-08-18 03:38:40 +00:00
README.txt Revert "Test commit to check e-mail address. Please discard this." 2013-10-04 10:59:13 +00:00

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