Daniel Sanders ea28aafa83 Fix illegal DAG produced by SelectionDAG::getConstant() for v2i64 type ... Summary: When getConstant() is called for an expanded vector type, it is split into multiple scalar constants which are then combined using appropriate build_vector and bitcast operations. In addition to the usual big/little endian differences, the case where the element-order of the vector does not have the same endianness as the elements themselves is also accounted for. For example, for v4i32 on big-endian MIPS, the byte-order of the vector is <3210,7654,BA98,FEDC>. For little-endian, it is <0123,4567,89AB,CDEF>. Handling this case turns out to be a nop since getConstant() returns a splatted vector (so reversing the element order doesn't change the value) This fixes a number of cases in MIPS MSA where calling getConstant() during operation legalization introduces illegal types (e.g. to legalize v2i64 UNDEF into a v2i64 BUILD_VECTOR of illegal i64 zeros). It should also handle bigger differences between illegal and legal types such as legalizing v2i64 into v8i16. lowerMSASplatImm() in the MIPS backend no longer needs to avoid calling getConstant() so this function has been updated in the same patch. For the sake of transparency, the steps I've taken since the review are: * Added 'virtual' to isVectorEltOrderLittleEndian() as requested. This revealed that the MIPS tests were falsely passing because a polymorphic function was not actually polymorphic in the reviewed patch. * Fixed the tests that were now failing. This involved deleting the code to handle the MIPS MSA element-order (which was previously doing an byte-order swap instead of an element-order swap). This left isVectorEltOrderLittleEndian() unused and it was deleted. * Fixed build failures caused by rebasing beyond r194467-r194472. These build failures involved the bset, bneg, and bclr instructions added in these commits using lowerMSASplatImm() in a way that was no longer valid after this patch. Some of these were fixed by calling SelectionDAG::getConstant() instead, others were fixed by a new function getBuildVectorSplat() that provided the removed functionality of lowerMSASplatImm() in a more sensible way. Reviewers: bkramer Reviewed By: bkramer CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D1973 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194811 91177308-0d34-0410-b5e6-96231b3b80d8		2013-11-15 12:56:49 +00:00
..
ADT	Fix a null pointer dereference when copying a null polymorphic pointer.	2013-11-13 02:48:20 +00:00
Analysis	Added BlockFrequencyInfo::view for displaying the block frequency propagation graph via graphviz.	2013-11-14 02:27:46 +00:00
Assembly	Enable *BasicBlockPass::createPrinterPass()	2013-02-08 23:37:41 +00:00
Bitcode	Add addrspacecast instruction.	2013-11-15 01:34:59 +00:00
CodeGen	Fix illegal DAG produced by SelectionDAG::getConstant() for v2i64 type	2013-11-15 12:56:49 +00:00
Config	Fix symbol defines in config.h.cmake	2013-11-05 07:27:18 +00:00
DebugInfo	DWARF parser: Use ArrayRef to represent form sizes and simplify DWARFDIE::extractFast() interface. No functionality change.	2013-10-28 23:41:49 +00:00
ExecutionEngine	Optimizing MCJIT module state tracking	2013-10-24 00:19:14 +00:00
IR	Add addrspacecast instruction.	2013-11-15 01:34:59 +00:00
IRReader	Split out the IRReader header and the utility functions it provides into	2013-03-26 02:25:37 +00:00
LTO	Protect user-supplied runtime library functions in LTO	2013-11-12 21:44:01 +00:00
MC	Remove AllowQuotesInName and friends from MCAsmInfo.	2013-11-13 14:01:59 +00:00
Object	move getSymbolNMTypeChar to the one program that needs it: nm.	2013-11-02 21:16:09 +00:00
Option	Option parsing: support case-insensitive option matching.	2013-08-28 20:04:31 +00:00
Support	Include raw_ostream.h.	2013-11-15 01:25:34 +00:00
TableGen	Speling fixes.	2013-10-22 15:18:03 +00:00
Target	Add target hook to prevent folding some bitcasted loads.	2013-11-15 04:42:23 +00:00
Transforms	SampleProfileLoader pass. Initial setup.	2013-11-13 12:22:21 +00:00
AutoUpgrade.h	Add addrspacecast instruction.	2013-11-15 01:34:59 +00:00
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	Reformat.	2013-10-15 21:22:12 +00:00
DIBuilder.h	fix two typos.	2013-10-21 23:55:19 +00:00
GVMaterializer.h	Use error_code in GVMaterializer.	2013-11-05 19:36:34 +00:00
InitializePasses.h	SampleProfileLoader pass. Initial setup.	2013-11-13 12:22:21 +00:00
InstVisitor.h	Add addrspacecast instruction.	2013-11-15 01:34:59 +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	Remove the very substantial, largely unmaintained legacy PGO	2013-10-02 15:42:23 +00:00
Linker.h	Add a 'deleteModule' method to the Linker class.	2013-10-16 08:59:57 +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	Move the old pass manager infrastructure into a legacy namespace and	2013-11-09 12:26:54 +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