Sanjay Patel c36b1d69e0 [DAGCombiner] eliminate shuffle of insert element ...

I noticed this pattern in D38316 / D38388. We failed to combine a shuffle that is either 
repeating a scalar insertion at the same position in a vector or translated to a different 
element index.

Like the earlier patch, this could be an instcombine too, but since we opted to make this 
a DAG transform earlier, I've made this one a DAG patch too.

We do not need any legality checking because the new insert is identical to the existing 
insert except that it may have a different constant insertion operand.

The constant insertion test in test/CodeGen/X86/vector-shuffle-combining.ll was the 
motivation for D38756.

Differential Revision: https://reviews.llvm.org/D40209


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320050 91177308-0d34-0410-b5e6-96231b3b80d8

2017-12-07 15:17:58 +00:00

..

CMakeLists.txt

Remove trailing whitespace to trigger re-cmaking

2017-10-02 21:54:38 +00:00

DAGCombiner.cpp

[DAGCombiner] eliminate shuffle of insert element

2017-12-07 15:17:58 +00:00

FastISel.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

FunctionLoweringInfo.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

InstrEmitter.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

InstrEmitter.h

…

LegalizeDAG.cpp

DAG: Legalize truncstores to illegal int types

2017-11-28 17:11:30 +00:00

LegalizeFloatTypes.cpp

[legalize-types] Clean up softening machinery.

2017-07-04 01:08:55 +00:00

LegalizeIntegerTypes.cpp

[SelectionDAG] Don't promote the condition operand of VSELECT when promoting the result.

2017-12-05 23:08:32 +00:00

LegalizeTypes.cpp

[SelectionDAG] Don't promote mask operand when widening mstore and mscatter.

2017-12-05 23:08:30 +00:00

LegalizeTypes.h

[SelectionDAG] Don't promote mask operand when widening mstore and mscatter.

2017-12-05 23:08:30 +00:00

LegalizeTypesGeneric.cpp

DAG: Add nuw when splitting loads and stores

2017-11-29 01:25:12 +00:00

LegalizeVectorOps.cpp

[SelectionDAG][X86] Teach promotion legalization for fp_to_sint/fp_to_uint to insert an assertsext/assertzext based on the original type

2017-11-29 22:15:43 +00:00

LegalizeVectorTypes.cpp

[SelectionDAG] In SplitVecOp_EXTRACT_VECTOR_ELT, simplify the code that makes the type byte addressable.

2017-12-07 08:04:34 +00:00

LLVMBuild.txt

…

ResourcePriorityQueue.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

ScheduleDAGFast.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

ScheduleDAGRRList.cpp

[CodeGen] Unify MBB reference format in both MIR and debug output

2017-12-04 17:18:51 +00:00

ScheduleDAGSDNodes.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

ScheduleDAGSDNodes.h

[Target] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

2017-01-11 01:45:03 +00:00

ScheduleDAGVLIW.cpp

[CodeGen] Unify MBB reference format in both MIR and debug output

2017-12-04 17:18:51 +00:00

SDNodeDbgValue.h

Doxygenify comments.

2017-10-24 17:23:40 +00:00

SelectionDAG.cpp

[SelectionDAG] Teach computeKnownBits some improvements to ISD::SRL with a non-splat constant shift amount.

2017-12-04 05:38:42 +00:00

SelectionDAGAddressAnalysis.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

SelectionDAGBuilder.cpp

Re-commit r319490 "XOR the frame pointer with the stack cookie when protecting the stack"

2017-12-05 20:22:20 +00:00

SelectionDAGBuilder.h

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +00:00

SelectionDAGDumper.cpp

[CodeGen] Rename functions PrintReg* to printReg*

2017-11-28 12:42:37 +00:00

SelectionDAGISel.cpp

[CodeGen] Unify MBB reference format in both MIR and debug output

2017-12-04 17:18:51 +00:00

SelectionDAGPrinter.cpp

Fix a bunch more layering of CodeGen headers that are in Target

2017-11-17 01:07:10 +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

Use getStoreSize() in various places instead of 'BitSize >> 3'.

2017-11-28 14:44:32 +00:00

StatepointLowering.h

[CodeGen] Fix some Clang-tidy modernize-use-default-member-init and Include What You Use warnings; other minor fixes (NFC).

2017-09-27 23:26:01 +00:00

TargetLowering.cpp

CodeGen: Fix pointer info in SplitVecOp_EXTRACT_VECTOR_ELT/SplitVecRes_INSERT_VECTOR_ELT

2017-12-02 22:13:22 +00:00