Arnold Schwaighofer e79d92c592 PatternMatch: Matcher for (un)ordered floating point min/max ... Add support for matching 'ordered' and 'unordered' floating point min/max constructs. In LLVM we can express min/max functions as a combination of compare and select. We have support for matching such constructs for integers but not for floating point. In floating point math there is no total order because of the presence of 'NaN'. Therefore, we have to be careful to preserve the original fcmp semantics when interpreting floating point compare select combinations as a minimum or maximum function. The resulting 'ordered/unordered' floating point maximum function has to select the same value as the select/fcmp combination it is based on. ordered_max(x,y) = max(x,y) iff x and y are not NaN, y otherwise unordered_max(x,y) = max(x,y) iff x and y are not NaN, x otherwise ordered_min(x,y) = min(x,y) iff x and y are not NaN, y otherwise unordered_min(x,y) = min(x,y) iff x and y are not NaN, x otherwise This matches the behavior of the underlying select(fcmp(olt/ult/.., L, R), L, R) construct. Any code using this predicate has to preserve this semantics. A follow-up patch will use this to implement floating point min/max reductions in the vectorizer. radar://13723044 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181143 91177308-0d34-0410-b5e6-96231b3b80d8		2013-05-05 01:54:46 +00:00
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ADT	SmallVector and SmallPtrSet allocations now power-of-two aligned.	2013-03-29 22:07:12 +00:00
Analysis	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
Bitcode	llvm/unittests: Use OwningPtr to fix --vg-leak.	2013-01-23 08:33:13 +00:00
DebugInfo	Create a stub for DWARF parser unittests	2013-04-17 08:29:02 +00:00
ExecutionEngine	This exposes more MCJIT options via the C API:	2013-05-01 22:58:00 +00:00
IR	PatternMatch: Matcher for (un)ordered floating point min/max	2013-05-05 01:54:46 +00:00
Option	llvm/unittests: Use OwningPtr to fix --vg-leak.	2013-01-23 08:33:13 +00:00
Support	Try to fix ProgramTest on FreeBSD	2013-04-30 04:30:41 +00:00
Transforms	Delete the functions F1 and F2 to appease the valgrind bot.	2013-04-10 23:21:26 +00:00
CMakeLists.txt	Create a stub for DWARF parser unittests	2013-04-17 08:29:02 +00:00
Makefile	Create a stub for DWARF parser unittests	2013-04-17 08:29:02 +00:00
Makefile.unittest