Craig Topper b955bf382c [LegalizeVectorTypes][X86][ARM][AArch64][PowerPC] Don't use SplitVecOp_TruncateHelper for FP_TO_SINT/UINT. ...

SplitVecOp_TruncateHelper tries to promote the result type while splitting FP_TO_SINT/UINT. It then concatenates the result and introduces a truncate to the original result type. But it does this without inserting the AssertZExt/AssertSExt that the regular result type promotion would insert. Nor does it turn FP_TO_UINT into FP_TO_SINT the way normal result type promotion for these operations does. This is bad on X86 which doesn't support FP_TO_SINT until AVX512.

This patch disables the use of SplitVecOp_TruncateHelper for these operations and just lets normal promotion handle it. I've tweaked a couple things in X86ISelLowering to avoid a few obvious regressions there. I believe all the changes on X86 are improvements. The other targets look neutral.

Differential Revision: https://reviews.llvm.org/D54906

llvm-svn: 347593

2018-11-26 21:12:39 +00:00

..

CMakeLists.txt

…

DAGCombiner.cpp

[x86] limit transform for select-of-fp-constants

2018-11-25 17:27:02 +00:00

FastISel.cpp

Add support for llvm.is.constant intrinsic (PR4898)

2018-11-07 15:24:12 +00:00

FunctionLoweringInfo.cpp

DAG: Add calling convention argument to calling convention funcs

2018-07-28 13:25:19 +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

[LegalizeTypes] Teach PromoteIntRes_BITCAST to better handle a bitcast with vector output type and a vector input type that needs to be widened

2018-10-30 03:27:15 +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

[Intrinsic] Signed and Unsigned Saturation Subtraction Intirnsics

2018-10-29 16:54:37 +00:00

LegalizeTypesGeneric.cpp

[LegalizeTypes] Fix bad indentation. NFC

2018-09-23 21:17:55 +00:00

LegalizeVectorOps.cpp

[LegalizeVectorOps] After custom legalizing an extending load or a truncating store, make sure the custom code is also legal.

2018-11-16 21:04:58 +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

…

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] move constant or splat functions to common location

2018-11-25 16:09:32 +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

[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

SelectionDAGPrinter.cpp

Rename DEBUG macro to LLVM_DEBUG.

2018-05-14 12:53:11 +00:00

SelectionDAGTargetInfo.cpp

…

StatepointLowering.cpp

Remove trailing space

2018-07-30 19:41:25 +00:00

StatepointLowering.h

…

TargetLowering.cpp

[TargetLowering] SimplifyDemandedBits - only reduce known bits for integer constants

2018-11-21 14:26:19 +00:00