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llvm-project/llvm/lib/CodeGen/SelectionDAG
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Sanjay Patel b205606d3e [SelectionDAG] fold constant with undef vector per element 
This makes the SDAG behavior consistent with the way we do this in IR.
It's possible that we were getting the wrong answer before. For example,
'xor undef, undef --> 0' but 'xor undef, C' --> undef. 

But the most practical improvement is likely as shown in the tests here - 
for FP, we were overconstraining undef lanes to NaN, and that can prevent 
vector simplifications/narrowing (see D51553).

llvm-svn: 348090
 		2018-12-02 13:48:42 +00:00
..
CMakeLists.txt Remove trailing whitespace to trigger re-cmaking 2017-10-02 21:54:38 +00:00
DAGCombiner.cpp [DAGCombiner] guard against an oversized shift crash 2018-12-02 13:33:56 +00:00
FastISel.cpp Add support for llvm.is.constant intrinsic (PR4898) 2018-11-07 15:24:12 +00:00
FunctionLoweringInfo.cpp AMDGPU: Fix various issues around the VirtReg2Value mapping 2018-11-30 22:55:29 +00:00
InstrEmitter.cpp [ARM] Make InstrEmitter mark CPSR defs dead for Thumb1. 2018-10-26 19:32:24 +00:00
InstrEmitter.h [DebugInfo] Convert intrinsic llvm.dbg.label to MachineInstr. 2018-05-09 02:41:08 +00:00
LLVMBuild.txt
…
LegalizeDAG.cpp [FPEnv] Add constrained CEIL/FLOOR/ROUND/TRUNC intrinsics 2018-11-05 15:59:49 +00:00
LegalizeFloatTypes.cpp [NFC] Rename minnan and maxnan to minimum and maximum 2018-10-24 22:49:55 +00:00
LegalizeIntegerTypes.cpp [SelectionDAG] Support result type promotion for FLT_ROUNDS_ 2018-11-30 13:18:33 +00:00
LegalizeTypes.cpp [DAG] Don't map a TableId to itself in the ReplacedValues map 2018-06-20 16:06:09 +00:00
LegalizeTypes.h [SelectionDAG] Support result type promotion for FLT_ROUNDS_ 2018-11-30 13:18:33 +00:00
LegalizeTypesGeneric.cpp [LegalizeTypes] Fix bad indentation. NFC 2018-09-23 21:17:55 +00:00
LegalizeVectorOps.cpp [SelectionDAG][AArch64][X86] Move legalization of vector MULHS/MULHU from LegalizeDAG to LegalizeVectorOps 2018-11-29 19:36:17 +00:00
LegalizeVectorTypes.cpp [LegalizeVectorTypes][X86][ARM][AArch64][PowerPC] Don't use SplitVecOp_TruncateHelper for FP_TO_SINT/UINT. 2018-11-26 21:12:39 +00:00
ResourcePriorityQueue.cpp Silence a bunch of implicit fallthrough warnings 2017-12-19 22:05:25 +00:00
SDNodeDbgValue.h SelectionDAG: Add compact SDDbgValue representation to -dag-dump-verbose output 2018-09-14 17:08:02 +00:00
ScheduleDAGFast.cpp ScheduleDAG: Cleanup dumping code; NFC 2018-09-19 00:23:35 +00:00
ScheduleDAGRRList.cpp ScheduleDAG: Cleanup dumping code; NFC 2018-09-19 00:23:35 +00:00
ScheduleDAGSDNodes.cpp llvm::sort(C.begin(), C.end(), ...) -> llvm::sort(C, ...) 2018-09-27 02:13:45 +00:00
ScheduleDAGSDNodes.h ScheduleDAG: Cleanup dumping code; NFC 2018-09-19 00:23:35 +00:00
ScheduleDAGVLIW.cpp ScheduleDAG: Cleanup dumping code; NFC 2018-09-19 00:23:35 +00:00
SelectionDAG.cpp [SelectionDAG] fold constant with undef vector per element 2018-12-02 13:48:42 +00:00
SelectionDAGAddressAnalysis.cpp [SelectionDAG] Teach BaseIndexOffset::match to unwrap the base after looking through an add/or 2018-11-26 20:16:33 +00:00
SelectionDAGBuilder.cpp [SelectionDAG] Compute known bits and num sign bits for live out vector registers. Use it to add AssertZExt/AssertSExt in the live in basic blocks 2018-11-20 04:30:26 +00:00
SelectionDAGBuilder.h [IR] Add a dedicated FNeg IR Instruction 2018-11-13 18:15:47 +00:00
SelectionDAGDumper.cpp [FPEnv] Add constrained CEIL/FLOOR/ROUND/TRUNC intrinsics 2018-11-05 15:59:49 +00:00
SelectionDAGISel.cpp TableGen/ISel: Allow PatFrag predicate code to access captured operands 2018-11-30 14:15:13 +00:00
SelectionDAGPrinter.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
SelectionDAGTargetInfo.cpp [CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). 2017-09-13 21:15:20 +00:00
StatepointLowering.cpp [CodeGen] Prefer static frame index for STATEPOINT liveness args 2018-11-30 16:22:41 +00:00
StatepointLowering.h [IR][CodeGen] Remove dependency on EVT from IR/Function.cpp. Move EVT to CodeGen layer. 2018-03-29 17:21:10 +00:00
TargetLowering.cpp [SelectionDAG] Improve SimplifyDemandedBits to SimplifyDemandedVectorElts simplification 2018-12-01 12:08:55 +00:00