Sanjay Patel 597d03ba90 [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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@348090 91177308-0d34-0410-b5e6-96231b3b80d8

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

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

LLVMBuild.txt

…

ResourcePriorityQueue.cpp

Silence a bunch of implicit fallthrough warnings

2017-12-19 22:05:25 +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

SDNodeDbgValue.h

SelectionDAG: Add compact SDDbgValue representation to -dag-dump-verbose output

2018-09-14 17:08:02 +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