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LLVM backend for 6502
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c7e77f91fe
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Juergen Ributzka c7e77f91fe SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. 
This patch reapplies r193676 with an additional fix for the Hexagon backend. The
SystemZ backend has already been fixed by r194148.

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. 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@194542 91177308-0d34-0410-b5e6-96231b3b80d8
2013-11-13 01:57:54 +00:00
autoconf [autoconf] Prune "runtime" stuff in configure, corresponding to r191835. 2013-11-11 13:53:52 +00:00
bindings [OCaml] Dynamically link LLVM on --enable-shared builds 2013-11-12 20:55:49 +00:00
cmake Remove NDBEUG from all release types compile flags. 2013-10-19 07:30:37 +00:00
docs Add new FileCheck feature to 3.4 release notes 2013-11-12 08:05:30 +00:00
examples Add missing #include's to cctype when using isdigit/alpha/etc. 2013-10-12 00:55:57 +00:00
include Give folks a reference to some material on the fundamental design 2013-11-13 01:51:36 +00:00
lib SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. 2013-11-13 01:57:54 +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. 2013-11-13 01:57:54 +00:00
tools Add support for DT_VERxxx and DT_MIPS_xxx .dynamic section entries to the 2013-11-11 20:51:48 +00:00
unittests Introduce an AnalysisManager which is like a pass manager but with a lot 2013-11-13 01:12:08 +00:00
utils Allow multiple check prefixes in FileCheck. 2013-11-10 02:04:09 +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 Modify CMakeLists.txt to work around pr17763 and bring some bots back. 2013-10-31 22:13:41 +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 [autoconf] Prune "runtime" stuff in configure, corresponding to r191835. 2013-11-11 13:53:52 +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 Rules adjustments in order to build on DragonFly BSD. 2013-10-31 14:35:00 +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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