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Daniel Sanders fe6bd52bf2 [mips] BSEL's and BINS[RL] operands are reversed compared to the vselect node used in the pattern. 
Summary:
Correct the match patterns and the lowerings that made the CodeGen tests pass despite the mistakes.

The original testcase that discovered the problem was SingleSource/UnitTests/SignlessType/factor.c in test-suite.
During review, we also found that some of the existing CodeGen tests were incorrect and fixed them:
* bitwise.ll: In bsel_v16i8 the IfSet/IfClear were reversed because bsel and bmnz have different operand orders and the test didn't correctly account for this. bmnz goes 'IfClear, IfSet, CondMask', while bsel goes 'CondMask, IfClear, IfSet'.
* vec.ll: In the cases where a bsel is emitted as a bmnz (they are the same operation with a different input tied to the result) the operands were in the wrong order.
* compare.ll and compare_float.ll: The bsel operand order was correct for a greater-than comparison, but a greater-than comparison instruction doesn't exist. Lowering this operation inverts the condition so the IfSet/IfClear need to be swapped to match.

The differences between BSEL, BMNZ, and BMZ and how they map to/from vselect are rather confusing. I've therefore added a note to MSA.txt to explain this in a single place in addition to the comments that explain each case.

Reviewers: matheusalmeida, jacksprat

Reviewed By: matheusalmeida

Differential Revision: http://llvm-reviews.chandlerc.com/D3028

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203657 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-12 11:54:00 +00:00
autoconf Add a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
bindings [python-bindings] Remove some cruft that snuck in. 2014-02-23 04:43:26 +00:00
cmake [CMake] add_llvm_target(): No need to include TABLEGEN_OUTPUT in source list. 2014-03-04 17:05:28 +00:00
docs IR: add a second ordering operand to cmpxhg for failure 2014-03-11 10:48:52 +00:00
examples Fix warnings about an variable only used in asserts. 2014-03-06 06:35:46 +00:00
include Replace '#include ValueTypes.h' with forward declarations. 2014-03-12 08:00:24 +00:00
lib [mips] BSEL's and BINS[RL] operands are reversed compared to the vselect node used in the pattern. 2014-03-12 11:54:00 +00:00
projects "Mac OS/X" -> "Mac OS X" spelling fixes for llvm. 2014-03-07 18:08:54 +00:00
test [mips] BSEL's and BINS[RL] operands are reversed compared to the vselect node used in the pattern. 2014-03-12 11:54:00 +00:00
tools Object: rename ARMV7 to ARMNT 2014-03-11 03:08:37 +00:00
unittests support: add a utility function to normalise path separators 2014-03-11 22:05:42 +00:00
utils [lit] Fix non-function style print statement. 2014-03-11 14:05:49 +00:00
.arcconfig
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.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 move WITH_POLLY option before add_subdirectory(tools) 2014-03-11 22:42:07 +00:00
CODE_OWNERS.TXT Add myself as owner for libc++ 2014-02-18 14:03:17 +00:00
configure Add a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
CREDITS.TXT Fix documentation typos 2013-12-20 00:33:39 +00:00
LICENSE.TXT Update the copyright credits -- Happy new year 2014! 2014-01-01 08:27:31 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile Provide CMake package modules in install tree 2014-02-09 16:37:02 +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 a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
Makefile.rules "Mac OS/X" -> "Mac OS X" spelling fixes for llvm. 2014-03-07 18:08:54 +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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