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
..
ADT	Add ArrayRef constructor from None, and do the cleanups that this constructor enables	2013-05-05 00:40:33 +00:00
Analysis	RegionInfo: Add helpers to replace entry/exit recursively	2013-04-10 06:54:49 +00:00
Assembly	Enable *BasicBlockPass::createPrinterPass()	2013-02-08 23:37:41 +00:00
Bitcode	Whitespace cleanup	2013-04-01 02:28:07 +00:00
CodeGen	Add ArrayRef constructor from None, and do the cleanups that this constructor enables	2013-05-05 00:40:33 +00:00
Config	Allow host triple to be correctly overridden in CMake builds	2013-05-04 07:36:23 +00:00
DebugInfo	Create a stub for DWARF parser unittests	2013-04-17 08:29:02 +00:00
ExecutionEngine	This patch breaks up Wrap.h so that it does not have to include all of	2013-05-01 20:59:00 +00:00
IR	Add ArrayRef constructor from None, and do the cleanups that this constructor enables	2013-05-05 00:40:33 +00:00
IRReader	Split out the IRReader header and the utility functions it provides into	2013-03-26 02:25:37 +00:00
MC	Add ArrayRef constructor from None, and do the cleanups that this constructor enables	2013-05-05 00:40:33 +00:00
Object	Revert r181009.	2013-05-03 23:57:17 +00:00
Option	Use LLVM_DELETED_FUNCTION rather than '// do not implement' comments.	2013-02-18 23:11:17 +00:00
Support	PatternMatch: Matcher for (un)ordered floating point min/max	2013-05-05 01:54:46 +00:00
TableGen	Make sure TableGen exits with an error code after printing errors.	2013-03-20 20:43:11 +00:00
Target	Move C++ code out of the C headers and into either C++ headers	2013-04-22 22:47:22 +00:00
Transforms	fix a typo that due to cu&paste quadrupled itself	2013-04-26 18:10:50 +00:00
AutoUpgrade.h
CMakeLists.txt	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
DebugInfo.h	Revert "Revert "PR14606: debug info imported_module support""	2013-04-22 06:12:31 +00:00
DIBuilder.h	Make doxygen comment match declaration.	2013-04-22 15:21:03 +00:00
GVMaterializer.h	Fix include guards so they exactly match file names.	2013-01-10 00:45:19 +00:00
InitializePasses.h	Add support for bottom-up SLP vectorization infrastructure.	2013-04-09 19:44:35 +00:00
InstVisitor.h	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
LinkAllIR.h	Rename LinkAllVMCore.h to LinkAllIR.h since VMCore directory was renamed to IR.	2013-01-10 21:55:02 +00:00
LinkAllPasses.h	Add support for bottom-up SLP vectorization infrastructure.	2013-04-09 19:44:35 +00:00
Linker.h	Fix a performance bug in the Linker.	2013-05-04 05:05:18 +00:00
Pass.h	moves doInitialization and doFinalization to the Pass class and removes some unreachable code in MachineModuleInfo	2012-12-03 21:56:57 +00:00
PassAnalysisSupport.h	Fix include guards so they exactly match file names.	2013-01-10 00:45:19 +00:00
PassManager.h	This patch breaks up Wrap.h so that it does not have to include all of	2013-05-01 20:59:00 +00:00
PassManagers.h	Use a DenseMap instead of a std::map for AnalysisID -> Pass* maps. This reduces the pass-manager overhead from FPPassManager::runOnFunction() by about 10%.	2013-02-26 01:31:59 +00:00
PassRegistry.h	This patch breaks up Wrap.h so that it does not have to include all of	2013-05-01 20:59:00 +00:00
PassSupport.h	Fix include guards so they exactly match file names.	2013-01-10 00:45:19 +00:00