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liaolucy (Liao Chunyu)
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User Since
Sep 17 2020, 7:09 AM (93 w, 4 d)

Recent Activity

Yesterday

liaolucy added a comment to D129072: [RISCV] Fix the scale of getIntMatCost and also need adjust for getIntImmCost.

I would like to ask a question, is this patch to reduce code size?

Mon, Jul 4, 5:55 PM · Restricted Project, Restricted Project

Wed, Jun 29

liaolucy added a comment to D128250: [LLDB][RISCV]Add initial support for lldb-server..

Thanks all.

Wed, Jun 29, 6:36 PM · Restricted Project, Restricted Project

Tue, Jun 28

liaolucy added a comment to D128250: [LLDB][RISCV]Add initial support for lldb-server..

I try to build lldb with the patch, but fail:

The environment:

cat /proc/cpuinfo 
processor       : 0
hart            : 2
isa             : rv64imafdc
mmu             : sv39
uarch           : sifive,u74-mc

llvm commit: d1b098fc

Command: cmake -DLLVM_TARGETS_TO_BUILD="RISCV" -DLLVM_ENABLE_PROJECTS="lldb" -DCMAKE_BUILD_TYPE="Release" -G Ninja ../llvm

Error:

CMake Error at /home/liaochunyu/llvm-project/lldb/cmake/modules/LLDBConfig.cmake:289 (message):
  Expected directory for clang-resource headers not found:
Call Stack (most recent call first):
  /home/liaochunyu/llvm-project/lldb/CMakeLists.txt:28 (include)


-- Configuring incomplete, errors occurred!

The most convenient way to handle clang dependencies is adding clang to LLVM_ENABLE_PROJECTS

-DLLVM_ENABLE_PROJECTS="lldb;clang"

Tue, Jun 28, 11:47 PM · Restricted Project, Restricted Project
liaolucy added a comment to D128250: [LLDB][RISCV]Add initial support for lldb-server..

I try to build lldb with the patch, but fail:

Tue, Jun 28, 6:29 PM · Restricted Project, Restricted Project

Mon, Jun 27

liaolucy committed rG1178992c72b0: [RISCV] Optimize 2x SELECT for floating-point types (authored by liaolucy).
[RISCV] Optimize 2x SELECT for floating-point types
Mon, Jun 27, 9:02 PM · Restricted Project, Restricted Project
liaolucy closed D127871: [RISCV] Optimize 2x SELECT for floating-point types.
Mon, Jun 27, 9:02 PM · Restricted Project, Restricted Project
liaolucy abandoned D128613: Add explicit index type for llvm.vector.extract.
Mon, Jun 27, 6:31 PM · Restricted Project, Restricted Project, Restricted Project
liaolucy accepted D128624: [RISCV] Zero extend immediate for vget/vset builtins to match vector.insert/extract intrinsics..

LGTM, thanks

Mon, Jun 27, 6:21 PM · Restricted Project, Restricted Project

Sun, Jun 26

liaolucy added a comment to D128613: Add explicit index type for llvm.vector.extract.

The patch : fix crash for rv32 vget intrinsics

Sun, Jun 26, 8:32 AM · Restricted Project, Restricted Project, Restricted Project
liaolucy requested review of D128613: Add explicit index type for llvm.vector.extract.
Sun, Jun 26, 8:31 AM · Restricted Project, Restricted Project, Restricted Project

Mon, Jun 20

liaolucy added a comment to D127447: [RISCV] Cost model for scalable reductions.

Don't we need to qualify Opcode?

D126372, I tried to implement a preliminary support, referring to other architectures limiting some opcode

Isn't the opcode checked on line 356?

if (ISD != ISD::ADD && ISD != ISD::OR && ISD != ISD::XOR && ISD != ISD::AND &&
      ISD != ISD::FADD)
Mon, Jun 20, 12:22 AM · Restricted Project, Restricted Project

Sun, Jun 19

liaolucy updated the diff for D127871: [RISCV] Optimize 2x SELECT for floating-point types.

address craig.topper's comments and thanks

Sun, Jun 19, 11:59 PM · Restricted Project, Restricted Project

Thu, Jun 16

liaolucy added a comment to D127447: [RISCV] Cost model for scalable reductions.

Don't we need to qualify Opcode?

Thu, Jun 16, 7:32 PM · Restricted Project, Restricted Project
liaolucy abandoned D121677: [RISCV] Return Invalid cost in getGatherScatterOpCost instead of crashing for scalable vectors.

After a series of @reames's patches, no crash, thanks.

Thu, Jun 16, 7:13 PM · Restricted Project, Restricted Project
liaolucy committed rG6181c192837d: [AMDGPU][NFC] Remove isConstantAddr (authored by liaolucy).
[AMDGPU][NFC] Remove isConstantAddr
Thu, Jun 16, 5:49 PM · Restricted Project, Restricted Project
liaolucy closed D127959: [AMDGPU][NFC] Remove isConstantAddr.
Thu, Jun 16, 5:49 PM · Restricted Project, Restricted Project
liaolucy added a comment to D127959: [AMDGPU][NFC] Remove isConstantAddr.

warning:

llvm-project/llvm/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.cpp:339:6: warning: ‘bool {anonymous}::AMDGPUPerfHint::isConstantAddr(const llvm::Value*) const’ defined but not used [-Wunused-function]
  339 | bool AMDGPUPerfHint::isConstantAddr(const Value *V) const {
      |      ^~~~~~~~~~~~~~
Thu, Jun 16, 5:58 AM · Restricted Project, Restricted Project
liaolucy requested review of D127959: [AMDGPU][NFC] Remove isConstantAddr.
Thu, Jun 16, 5:58 AM · Restricted Project, Restricted Project
liaolucy added a comment to D127944: [llvm-c][NFC] fix build warning for reinterpret_cast.

warning:

llvm-project/llvm/lib/IR/Core.cpp:90:18: warning: cast between incompatible function types from ‘LLVMDiagnosticHandler’ {aka ‘void (*)(LLVMOpaqueDiagnosticInfo*, void*)’} to ‘llvm::DiagnosticHandler::DiagnosticHandlerTy’ {aka ‘void (*)(const llvm::DiagnosticInfo&, void*)’} [-Wcast-function-type]
   90 |           Handler),
      |                  ^
Thu, Jun 16, 12:00 AM · Restricted Project, Restricted Project
liaolucy requested review of D127944: [llvm-c][NFC] fix build warning for reinterpret_cast.
Thu, Jun 16, 12:00 AM · Restricted Project, Restricted Project

Wed, Jun 15

liaolucy added a comment to D127871: [RISCV] Optimize 2x SELECT for floating-point types.

The asm of testcase before this patch:

Wed, Jun 15, 7:48 PM · Restricted Project, Restricted Project
liaolucy requested review of D127871: [RISCV] Optimize 2x SELECT for floating-point types.
Wed, Jun 15, 9:10 AM · Restricted Project, Restricted Project

Jun 3 2022

liaolucy committed rGf14d18c7a954: [RISCV] Add more patterns for FNMADD (authored by liaolucy).
[RISCV] Add more patterns for FNMADD
Jun 3 2022, 9:32 PM · Restricted Project, Restricted Project
liaolucy closed D126852: [RISCV] Add more patterns for FNMADD.
Jun 3 2022, 9:31 PM · Restricted Project, Restricted Project

Jun 2 2022

liaolucy updated the summary of D126852: [RISCV] Add more patterns for FNMADD.
Jun 2 2022, 3:02 AM · Restricted Project, Restricted Project
liaolucy updated the diff for D126852: [RISCV] Add more patterns for FNMADD.

Address @craig.topper's comment.

Jun 2 2022, 3:01 AM · Restricted Project, Restricted Project

Jun 1 2022

liaolucy requested review of D126852: [RISCV] Add more patterns for FNMADD.
Jun 1 2022, 8:52 PM · Restricted Project, Restricted Project

May 27 2022

liaolucy added a comment to D123799: [RISCV] Mark FSIN and other math functions as Expand for scalable vectors..

I would like to ask a question:

What are the benefits of illegal costs? Is there a problem that illegal costs are trying to solve?

It prevents the vectorizer from creating llvm.sin, etc. with scalable vector types since they will crash in the backend.

May 27 2022, 3:21 AM · Restricted Project, Restricted Project
liaolucy added inline comments to D126372: [RISCV]Add basic cost model for vector reduce for scalable vector.
May 27 2022, 1:38 AM · Restricted Project, Restricted Project
liaolucy updated the diff for D126372: [RISCV]Add basic cost model for vector reduce for scalable vector.
  1. Add a illegal checks. Invalid types will crash.
if(!isTypeLegal(VTy))
  return BaseT::getArithmeticReductionCost(Opcode, VTy, FMF, CostKind);
  1. Remove deadcode.
May 27 2022, 1:37 AM · Restricted Project, Restricted Project

May 25 2022

liaolucy added a comment to D126440: [RISCV] Return an invalid cost for memory ops with unsupported types.

Maybe we can not return invalid costs. Just reference D123799.

May 25 2022, 8:33 PM · Restricted Project, Restricted Project
liaolucy updated the summary of D126372: [RISCV]Add basic cost model for vector reduce for scalable vector.
May 25 2022, 5:38 AM · Restricted Project, Restricted Project
liaolucy requested review of D126372: [RISCV]Add basic cost model for vector reduce for scalable vector.
May 25 2022, 5:36 AM · Restricted Project, Restricted Project

May 24 2022

Herald added a project to D92086: Generalized PatternMatch & InstSimplify: Restricted Project.
May 24 2022, 7:49 PM · Restricted Project, Restricted Project
liaolucy added a comment to D126273: [DAGCombiner][VP] Add DAGCombine for merging VP_FADD and VP_FMUL to VP_FMA..

When I test tsvc.

The IR is:

@llvm.fmuladd.nxv2f32(<vscale x 2 x float>.....

Not

@llvm.riscv.vfmul.nxv2f32.nxv2f32(<vscale x 2 x float> ......
@llvm.riscv.vfadd.nxv2f32.nxv2f32(<vscale x 2 x float> ......

So I am not sure, we need merge vp.fmul and vp.fadd to vp.fma. maybe vp.fma is enough?

fmuladd is use with -ffp-contract=on(the default). fmul+fadd is used with -ffast-math or -ffp-contract=fast or -Ofast.

May 24 2022, 8:46 AM · Restricted Project, Restricted Project
liaolucy added a comment to D126273: [DAGCombiner][VP] Add DAGCombine for merging VP_FADD and VP_FMUL to VP_FMA..

When I test tsvc.

The IR is:

@llvm.fmuladd.nxv2f32(<vscale x 2 x float>.....

Not

@llvm.riscv.vfmul.nxv2f32.nxv2f32(<vscale x 2 x float> ......
@llvm.riscv.vfadd.nxv2f32.nxv2f32(<vscale x 2 x float> ......

So I am not sure, we need merge vp.fmul and vp.fadd to vp.fma. maybe vp.fma is enough?

I am not sure what is tscv. Could you tell its full name?
But I think the case may happen when loop vectorizer generates vector prediction intrinsics.

tsvc:
https://github.com/llvm/llvm-test-suite/blob/main/MultiSource/Benchmarks/TSVC/tsc.inc

May 24 2022, 5:56 AM · Restricted Project, Restricted Project
liaolucy added a comment to D126273: [DAGCombiner][VP] Add DAGCombine for merging VP_FADD and VP_FMUL to VP_FMA..

When I test tsvc.

May 24 2022, 1:11 AM · Restricted Project, Restricted Project
liaolucy added inline comments to D126060: [RISCV] Add basic cost modelling for fixed length vector arithmetic.
May 24 2022, 12:21 AM · Restricted Project, Restricted Project
liaolucy updated the diff for D126060: [RISCV] Add basic cost modelling for fixed length vector arithmetic.

thanks craig.topper, testcases add +experimental-zvfh.
change LT.first + 1 to LT.first * 2

May 24 2022, 12:16 AM · Restricted Project, Restricted Project

May 23 2022

liaolucy updated the diff for D126060: [RISCV] Add basic cost modelling for fixed length vector arithmetic.

Address reames's comments. rebase

May 23 2022, 9:16 PM · Restricted Project, Restricted Project
liaolucy committed rG8e9528cb544a: [RISCV][NFC] Test cases for fmuladd intrinsic (authored by liaolucy).
[RISCV][NFC] Test cases for fmuladd intrinsic
May 23 2022, 2:04 AM · Restricted Project, Restricted Project
liaolucy closed D126049: [RISCV][NFC] Test cases for fmuladd intrinsic.
May 23 2022, 2:04 AM · Restricted Project, Restricted Project
liaolucy updated the diff for D126049: [RISCV][NFC] Test cases for fmuladd intrinsic.

These new testcases are placed to the end of the file, and rebase

May 23 2022, 1:19 AM · Restricted Project, Restricted Project

May 20 2022

liaolucy requested review of D126060: [RISCV] Add basic cost modelling for fixed length vector arithmetic.
May 20 2022, 3:56 AM · Restricted Project, Restricted Project
liaolucy added reviewers for D126049: [RISCV][NFC] Test cases for fmuladd intrinsic: craig.topper, frasercrmck, kito-cheng.
May 20 2022, 1:36 AM · Restricted Project, Restricted Project
liaolucy requested review of D126049: [RISCV][NFC] Test cases for fmuladd intrinsic.
May 20 2022, 1:33 AM · Restricted Project, Restricted Project

May 19 2022

liaolucy added a comment to D125856: [RISCV] Add cost model for SK_Reverse.

Why do D125866 need loop vectorization? Is the performance improved?

May 19 2022, 9:52 PM · Restricted Project, Restricted Project

May 17 2022

Herald added a project to D57059: [SLP] Initial support for the vectorization of the non-power-of-2 vectors.: Restricted Project.
May 17 2022, 7:18 PM · Restricted Project, Restricted Project

May 9 2022

liaolucy accepted D124655: [IR][CostModel] A scalable vector shuffle can't be an identity or reverse shuffle..

LGTM, thanks

May 9 2022, 6:30 PM · Restricted Project, Restricted Project
liaolucy added a comment to D125204: [RISCV] Use RISCVISAInfo to parse arch string from ELF build attribute..

The testcase already has arch attribute, so assemble disassemble are work fine as past, the difference is disassembler using RISCVISAInfo to parse arch string from ELF attribute.

May 9 2022, 12:20 AM · Restricted Project, Restricted Project

May 8 2022

liaolucy added a comment to D125204: [RISCV] Use RISCVISAInfo to parse arch string from ELF build attribute..

Does this test case need to be updated? llvm/test/MC/RISCV/attribute-with-insts.s

May 8 2022, 11:55 PM · Restricted Project, Restricted Project

Apr 28 2022

liaolucy committed rG03a3654203bb: [RISCV] Add cost model for SK_Broadcast (authored by liaolucy).
[RISCV] Add cost model for SK_Broadcast
Apr 28 2022, 10:28 PM · Restricted Project, Restricted Project
liaolucy closed D124101: [RISCV] Add cost model for SK_Broadcast.
Apr 28 2022, 10:28 PM · Restricted Project, Restricted Project
liaolucy updated the diff for D124101: [RISCV] Add cost model for SK_Broadcast.

Thanks craig.topper for the quick fix. rebase

Apr 28 2022, 10:27 PM · Restricted Project, Restricted Project

Apr 27 2022

liaolucy added inline comments to D124101: [RISCV] Add cost model for SK_Broadcast.
Apr 27 2022, 11:30 PM · Restricted Project, Restricted Project

Apr 20 2022

liaolucy retitled D124101: [RISCV] Add cost model for SK_Broadcast from Add cost model for SK_Broadcast to [RISCV] Add cost model for SK_Broadcast.
Apr 20 2022, 9:25 AM · Restricted Project, Restricted Project
liaolucy requested review of D124101: [RISCV] Add cost model for SK_Broadcast.
Apr 20 2022, 9:21 AM · Restricted Project, Restricted Project

Apr 18 2022

liaolucy added a comment to D123799: [RISCV] Mark FSIN and other math functions as Expand for scalable vectors..

I would like to ask a question:

Apr 18 2022, 6:52 PM · Restricted Project, Restricted Project

Apr 10 2022

liaolucy committed rG505fce5a9e5f: [RISCV] Add basic code modeling for llvm.experimental.stepvector intrinsic (authored by liaolucy).
[RISCV] Add basic code modeling for llvm.experimental.stepvector intrinsic
Apr 10 2022, 7:19 PM · Restricted Project, Restricted Project
liaolucy closed D122782: [RISCV] Add basic code modeling for llvm.experimental.stepvector intrinsic.
Apr 10 2022, 7:19 PM · Restricted Project, Restricted Project
liaolucy updated the diff for D122782: [RISCV] Add basic code modeling for llvm.experimental.stepvector intrinsic.

Thanks Kito. Rebase

Apr 10 2022, 7:17 PM · Restricted Project, Restricted Project

Mar 31 2022

Herald added a project to D119529: [BasicTTI] Set scalarization cost of getCommonMaskedMemoryOpCost to Invalid.: Restricted Project.

This function assumes fixed-width vectors and cannot be used for scalable vectors. I'm not sure what returning 'Invalid' here would really fix, other than the compiler not crashing for a use-case that should not have occurred in the first place, because an overloaded cost function should have been implemented. Whether the compiler falls into the assert from cast<FixedVectorType>, or whether it returns an Invalid cost, in either case you'll need to implement a memory-op-cost function for your target. And because you'll need to implement a cost-function anyway, returning Invalid doesn't really make a difference, because then this code will never be hit. Otherwise, you would have been able to write a test-case for it.

Mar 31 2022, 6:57 PM · Restricted Project, Restricted Project

Mar 30 2022

liaolucy added a comment to D121677: [RISCV] Return Invalid cost in getGatherScatterOpCost instead of crashing for scalable vectors.

I actually hit this same issue the day you posted this, which is fun. But I fear this is quite a lot of work to get watertight. I've left some comments showing where we'd still crash. I've also seen us crash on getIntrinsicInstrCost when given, e.g., llvm.cttz.nxv1i8.

Can adding a cost model for llvm.cttz.nxv1i8 solve this problem? I would like to try.

Mar 30 2022, 11:26 PM · Restricted Project, Restricted Project
liaolucy requested review of D122782: [RISCV] Add basic code modeling for llvm.experimental.stepvector intrinsic.
Mar 30 2022, 11:19 PM · Restricted Project, Restricted Project

Mar 15 2022

liaolucy added reviewers for D121677: [RISCV] Return Invalid cost in getGatherScatterOpCost instead of crashing for scalable vectors: Jim, sdesmalen.

https://reviews.llvm.org/D119529 maybe this patch , try to fix the same issue

Mar 15 2022, 2:39 AM · Restricted Project, Restricted Project
liaolucy added a comment to D121677: [RISCV] Return Invalid cost in getGatherScatterOpCost instead of crashing for scalable vectors.

I try to support scalable vectors in getGatherScatterOpCost, but I don't know how to support scalable vectors.

Mar 15 2022, 2:14 AM · Restricted Project, Restricted Project
liaolucy requested review of D121677: [RISCV] Return Invalid cost in getGatherScatterOpCost instead of crashing for scalable vectors.
Mar 15 2022, 2:13 AM · Restricted Project, Restricted Project

Mar 8 2022

liaolucy added a comment to D121199: [RISCV] Don't enable loop vectorizer interleaving if the V extension is scalable.
Mar 8 2022, 2:26 AM · Restricted Project, Restricted Project
liaolucy requested review of D121199: [RISCV] Don't enable loop vectorizer interleaving if the V extension is scalable.
Mar 8 2022, 2:07 AM · Restricted Project, Restricted Project

Mar 2 2022

Herald added a project to D104979: [VPlan, VP] WIP: Build and execute VP recipes: Restricted Project.
Mar 2 2022, 3:48 AM · Restricted Project, Restricted Project, Restricted Project
Herald added a project to D104673: [LV, VP] Add CLI option to support predicated vectorization: Restricted Project.
Mar 2 2022, 3:48 AM · Restricted Project, Restricted Project, Restricted Project
Herald added a project to D104610: [VPlan, VP] Introduce new live-in values and refactoring to support EVL recipe: Restricted Project.
Mar 2 2022, 3:48 AM · Restricted Project, Restricted Project, Restricted Project

Feb 23 2022

liaolucy added inline comments to D120287: [RISCV] Add isel patterns for masked RISCVISD::FMA_VL with RISCVISD::FNEG_VL..
Feb 23 2022, 5:41 PM · Restricted Project, Restricted Project

Jan 27 2022

liaolucy added a comment to D112774: [RISCV] Support k-ext clang intrinsics.

The scalar crypto v1.0 builtins/intrinsics is still under discussion. Maybe we should wait for the final results?

Jan 27 2022, 12:32 AM · Restricted Project, Restricted Project

Jan 25 2022

liaolucy added inline comments to D118160: [RISCV] Implement a basic version of AArch64RedundantCopyElimination pass..
Jan 25 2022, 8:25 PM · Restricted Project

Jan 24 2022

liaolucy added a comment to D118011: [RISCV] Adjust predicates and update intrinsic for clmul and clmulh in Zbkc extension .

clang Zbkc patch: https://reviews.llvm.org/D112774, If there are any mistakes, you can help to point them out

Jan 24 2022, 5:13 AM · Restricted Project, Restricted Project

Jan 23 2022

liaolucy added a comment to D118011: [RISCV] Adjust predicates and update intrinsic for clmul and clmulh in Zbkc extension .

Do you add intrinsic?

Jan 23 2022, 6:55 PM · Restricted Project, Restricted Project

Jan 4 2022

liaolucy added inline comments to D98136: [RISCV] Initially support the K-extension instructions on the LLVM MC layer.
Jan 4 2022, 5:19 AM · Restricted Project
liaolucy added inline comments to D98136: [RISCV] Initially support the K-extension instructions on the LLVM MC layer.
Jan 4 2022, 5:08 AM · Restricted Project

Dec 9 2021

liaolucy added inline comments to D98136: [RISCV] Initially support the K-extension instructions on the LLVM MC layer.
Dec 9 2021, 1:14 AM · Restricted Project

Oct 10 2021

liaolucy commandeered D102310: [RISCV][CodeGen] Implement IR Intrinsic support for K extension.
Oct 10 2021, 6:23 PM · Restricted Project

Mar 31 2021

liaolucy added a comment to D99668: [RISCV][Clang] Add some RVV Floating-Point intrinsic functions..

LGTM

Mar 31 2021, 4:45 PM · Restricted Project

Mar 29 2021

liaolucy added a comment to D99151: [RISCV][Clang] Add RVV vleff intrinsic functions..

LGTM, thanks

Mar 29 2021, 7:57 PM · Restricted Project

Mar 25 2021

liaolucy added inline comments to D99189: [RISCV][Clang] Update new overloading rules for RVV intrinsics..
Mar 25 2021, 6:57 PM · Restricted Project, Restricted Project

Mar 24 2021

liaolucy added inline comments to D99189: [RISCV][Clang] Update new overloading rules for RVV intrinsics..
Mar 24 2021, 12:01 AM · Restricted Project, Restricted Project

Mar 23 2021

liaolucy added a comment to D98848: [RISCV][Clang] Add RVV Vector Indexed Load intrinsic functions..

LGTM, thanks

Mar 23 2021, 7:30 AM · Restricted Project

Mar 4 2021

liaolucy added a comment to D90738: [RISCV] Support Zfh half-precision floating-point extension..

Is there a missing test for fcvt.h.d in the test case?

Mar 4 2021, 7:15 AM · Restricted Project

Jan 20 2021

liaolucy added inline comments to D95016: [Clang][RISCV] Add custom TableGen backend for riscv-vector intrinsics..
Jan 20 2021, 6:32 PM · Restricted Project, Restricted Project

Jan 13 2021

liaolucy added a comment to D92715: [Clang][RISCV] Define RISC-V V builtin types.

@liaolucy RISC-V vector types are sizeless types. Sizeless is kind of characteristic for builtin types. If we use attribute to declare RISC-V vector types, the frontend does not know anything about it. I still think to define RISC-V vector types as builtin types is a better way.

Jan 13 2021, 6:02 PM · Restricted Project

Dec 15 2020

liaolucy added inline comments to D93359: [RISCV] Define vle/vse intrinsics..
Dec 15 2020, 9:36 PM · Restricted Project

Dec 14 2020

liaolucy added inline comments to D93006: [RISCV] Initial support for RVV intrinsic.
Dec 14 2020, 12:40 AM · Restricted Project

Dec 8 2020

liaolucy added inline comments to D92715: [Clang][RISCV] Define RISC-V V builtin types.
Dec 8 2020, 12:26 AM · Restricted Project

Dec 7 2020

liaolucy added inline comments to D92715: [Clang][RISCV] Define RISC-V V builtin types.
Dec 7 2020, 3:17 AM · Restricted Project