[RISC-V] Print load immediate value in disassembly #114470

fuad1502 · 2025-04-10T04:31:14Z

Changes in this PR:

Grouped load immediate instructions into a single instrDesc (by introducing INS_OPTS_I & instrDescLoadImm)
Print immediate value on the last load immediate instruction.

See first note from @BruceForstall #113250 (comment) in the merged PR (although I decided to put the comment on the last instruction, is it better to put it at the first one as requested?)

C# source code:

[MethodImpl(MethodImplOptions.NoInlining)]
public ulong Fun13()
{
		return 0x07ffffc112312345;
}

Disassembly output:

G_M25971_IG02:  ;; offset=0x0010
            lui            a0, -515514
            addiw          a0, a0, 583
            slli           a0, a0, 12
            addi           a0, a0, -1888
            srli           a0, a0, 5            ;; load imm: hex=0x07FFFFC112312345 dec=576460482025694021
                                                ;; size=20 bbWeight=1 PerfScore 2.50

Part of #84834, cc @dotnet/samsung

…d print imm value in disasm

dotnet-policy-service · 2025-04-10T04:32:00Z

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

fuad1502 · 2025-04-10T04:33:35Z

Diffs are based on 12,502 contexts (10,177 MinOpts, 2,325 FullOpts).

Overall (+0 bytes)

Collection	Base size (bytes)	Diff size (bytes)	PerfScore in Diffs
test.mch	6,214,876	+0	-0.00%

MinOpts (+0 bytes)

Collection	Base size (bytes)	Diff size (bytes)	PerfScore in Diffs
test.mch	4,839,896	+0	0.00%

FullOpts (+0 bytes)

Collection	Base size (bytes)	Diff size (bytes)	PerfScore in Diffs
test.mch	1,374,980	+0	-0.00%

Example diffs

test.mch

+0 (0.00%) : 1.dasm - System.Runtime.CompilerServices.GenericsHelpers:ClassWithSlotAndModule(long,ulong):long (Instrumented Tier1)

@@ -119,7 +119,7 @@ RWD08  	dq	000074CB4BAB17D2h
 RWD16  	dq	000074CB4BEA4BECh
 
 
-; Total bytes of code 328, prolog size 60, PerfScore 163.50, instruction count 68, allocated bytes for code 328 (MethodHash=b5296683) for method System.Runtime.CompilerServices.GenericsHelpers:ClassWithSlotAndModule(long,ulong):long (Instrumented Tier1)
+; Total bytes of code 328, prolog size 60, PerfScore 163.50, instruction count 64, allocated bytes for code 328 (MethodHash=b5296683) for method System.Runtime.CompilerServices.GenericsHelpers:ClassWithSlotAndModule(long,ulong):long (Instrumented Tier1)
 ; ============================================================
 
 Unwind Info:

+0 (0.00%) : 17.dasm - __GeneratedMainWrapper:Main():int (Tier0)

@@ -104,7 +104,7 @@ G_M2004_IG09:        ; bbWeight=1, funclet epilog, nogc, extend
             addi           sp, sp, 32
             ret						;; size=16 bbWeight=1 PerfScore 7.50
 
-; Total bytes of code 260, prolog size 32, PerfScore 115.00, instruction count 61, allocated bytes for code 260 (MethodHash=2a2bf82b) for method __GeneratedMainWrapper:Main():int (Tier0)
+; Total bytes of code 260, prolog size 32, PerfScore 115.00, instruction count 49, allocated bytes for code 260 (MethodHash=2a2bf82b) for method __GeneratedMainWrapper:Main():int (Tier0)
 ; ============================================================
 
 Unwind Info:

+0 (0.00%) : 65.dasm - System.String:Ctor(ulong):System.String (Instrumented Tier1)

@@ -132,7 +132,7 @@ RWD00  	dq	00007323F4AD42ECh
 RWD08  	dq	00007323F4AD42E8h
 
 
-; Total bytes of code 340, prolog size 24, PerfScore 64.09, instruction count 83, allocated bytes for code 340 (MethodHash=0f67cbd1) for method System.String:Ctor(ulong):System.String (Instrumented Tier1)
+; Total bytes of code 340, prolog size 24, PerfScore 64.09, instruction count 52, allocated bytes for code 340 (MethodHash=0f67cbd1) for method System.String:Ctor(ulong):System.String (Instrumented Tier1)
 ; ============================================================
 
 Unwind Info:

+0 (0.00%) : 12496.dasm - Microsoft.CodeAnalysis.CSharp.Symbols.SourceMethodSymbolWithAttributes:get_DeclaringSyntaxReferences():System.Collections.Immutable.ImmutableArray`1[Microsoft.CodeAnalysis.SyntaxReference]:this (Instrumented Tier0)

@@ -25,11 +25,11 @@ G_M22631_IG02:        ; bbWeight=1, gcrefRegs=0000 {}, byrefRegs=0000 {}, byref
             ld             a0, 0xD1FFAB1E(a0)
             beqz           a0, G_M22631_IG04
             lui            a0, 0xD1FFAB1E
-            ; gcrRegs -[a0]
             addiw          a0, a0, 0xD1FFAB1E
             slli           a0, a0, 13
             addi           a0, a0, 0xD1FFAB1E
             slli           a0, a0, 3
+            ; gcrRegs -[a0]
             lui            a1, 0xD1FFAB1E
             addiw          a1, a1, 0xD1FFAB1E
             slli           a1, a1, 12
@@ -85,7 +85,7 @@ RWD00  	dq	00007CAB40B89C78h
 RWD08  	dq	00007CAB41E7390Ch
 
 
-; Total bytes of code 212, prolog size 16, PerfScore 71.00, instruction count 51, allocated bytes for code 212 (MethodHash=428ca798) for method Microsoft.CodeAnalysis.CSharp.Symbols.SourceMethodSymbolWithAttributes:get_DeclaringSyntaxReferences():System.Collections.Immutable.ImmutableArray`1[Microsoft.CodeAnalysis.SyntaxReference]:this (Instrumented Tier0)
+; Total bytes of code 212, prolog size 16, PerfScore 71.00, instruction count 31, allocated bytes for code 212 (MethodHash=428ca798) for method Microsoft.CodeAnalysis.CSharp.Symbols.SourceMethodSymbolWithAttributes:get_DeclaringSyntaxReferences():System.Collections.Immutable.ImmutableArray`1[Microsoft.CodeAnalysis.SyntaxReference]:this (Instrumented Tier0)
 ; ============================================================
 
 Unwind Info:

+0 (0.00%) : 12384.dasm - Microsoft.CodeAnalysis.CSharp.Symbols.SymbolExtensions:ShouldCheckRequiredMembers(Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol):ubyte (Tier1)

@@ -218,7 +218,7 @@ G_M22420_IG19:        ; bbWeight=0.50, epilog, nogc, extend
 RWD00  	dq	00007CAB3FC1BDC8h
 
 
-; Total bytes of code 504, prolog size 28, PerfScore 103.30, instruction count 125, allocated bytes for code 504 (MethodHash=9bdfa86b) for method Microsoft.CodeAnalysis.CSharp.Symbols.SymbolExtensions:ShouldCheckRequiredMembers(Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol):ubyte (Tier1)
+; Total bytes of code 504, prolog size 28, PerfScore 103.30, instruction count 97, allocated bytes for code 504 (MethodHash=9bdfa86b) for method Microsoft.CodeAnalysis.CSharp.Symbols.SymbolExtensions:ShouldCheckRequiredMembers(Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol):ubyte (Tier1)
 ; ============================================================
 
 Unwind Info:

+0 (0.00%) : 12288.dasm - Microsoft.CodeAnalysis.Collections.OrderPreservingMultiDictionary`2[System.__Canon,System.__Canon]:Free():this (Instrumented Tier0)

@@ -342,10 +342,10 @@ G_M52571_IG25:        ; bbWeight=1, gcrefRegs=0000 {}, byrefRegs=0000 {}, byref
             ld             a0, -88(fp)
             bnez           a0, G_M52571_IG27
             lui            a0, 0xD1FFAB1E
-            ; gcrRegs -[a0]
             addiw          a0, a0, 0xD1FFAB1E
             slli           a0, a0, 16
             addi           a0, a0, 0xD1FFAB1E
+            ; gcrRegs -[a0]
             lui            a1, 0xD1FFAB1E
             addiw          a1, a1, 0xD1FFAB1E
             slli           a1, a1, 12
@@ -461,7 +461,7 @@ RWD08  	dq	00007CAB41DCB3E8h
 RWD16  	dq	00007CABBA41EBC6h
 
 
-; Total bytes of code 1248, prolog size 60, PerfScore 453.26, instruction count 308, allocated bytes for code 1248 (MethodHash=8e8b32a4) for method Microsoft.CodeAnalysis.Collections.OrderPreservingMultiDictionary`2[System.__Canon,System.__Canon]:Free():this (Instrumented Tier0)
+; Total bytes of code 1248, prolog size 60, PerfScore 453.26, instruction count 217, allocated bytes for code 1248 (MethodHash=8e8b32a4) for method Microsoft.CodeAnalysis.Collections.OrderPreservingMultiDictionary`2[System.__Canon,System.__Canon]:Free():this (Instrumented Tier0)
 ; ============================================================
 
 Unwind Info:

Details

Size improvements/regressions per collection

Collection	Contexts with diffs	Improvements	Regressions	Same size	Improvements (bytes)	Regressions (bytes)
test.mch	4,361	0	0	4,361	-0	+0

PerfScore improvements/regressions per collection

Collection	Contexts with diffs	Improvements	Regressions	Same PerfScore	Improvements (PerfScore)	Regressions (PerfScore)	PerfScore Overall in FullOpts
test.mch	4,361	0	0	4,361	0.00%	0.00%	-0.0000%

Context information

Collection	Diffed contexts	MinOpts	FullOpts	Missed, base	Missed, diff
test.mch	12,502	10,177	2,325	0 (0.00%)	0 (0.00%)

jit-analyze output

risc-vv · 2025-04-10T04:36:05Z

RISC-V Release-CLR-VF2: 9532 / 9552 (99.79%)

=======================
      passed: 9532
      failed: 3
     skipped: 107
      killed: 17
------------------------
  TOTAL libs: 9659
 TOTAL tests: 9659
   REAL time: 2h 12min 43s 565ms
=======================

Release-CLR-VF2.md, Release-CLR-VF2.xml, testclr_output.tar.gz

Build information and commands

GIT: d2ced94133f4e10972ae1845734aa0a204e6d6ae
CI: 09909bfe3d23ad26455327811013bcbb48915255
REPO: dotnet/runtime
BRANCH: main
CONFIG: Release
LIB_CONFIG: Release

RISC-V Release-CLR-QEMU: 9532 / 9552 (99.79%)

=======================
      passed: 9532
      failed: 3
     skipped: 107
      killed: 17
------------------------
  TOTAL libs: 9659
 TOTAL tests: 9659
   REAL time: 2h 47min 38s 229ms
=======================

Release-CLR-QEMU.md, Release-CLR-QEMU.xml, testclr_output.tar.gz

Build information and commands

GIT: d2ced94133f4e10972ae1845734aa0a204e6d6ae
CI: 09909bfe3d23ad26455327811013bcbb48915255
REPO: dotnet/runtime
BRANCH: main
CONFIG: Release
LIB_CONFIG: Release

src/coreclr/jit/emitriscv64.cpp

risc-vv · 2025-04-10T14:06:05Z

5331560 is being scheduled for building and testing

GIT: 533156096ae6d63f280324ee8a81a0299beb2ca5
REPO: dotnet/runtime
BRANCH: main

{CONFIG}-CLR-tests FAILED

buildinfo.json
coreCLR tests failed for unknown reason. Check buildinfo.json or gocd for more details.

src/coreclr/jit/emitriscv64.cpp

risc-vv · 2025-04-11T09:31:06Z

RISC-V Release-CLR-QEMU: 9532 / 9552 (99.79%)

=======================
      passed: 9532
      failed: 3
     skipped: 107
      killed: 17
------------------------
  TOTAL libs: 9659
 TOTAL tests: 9659
   REAL time: 2h 47min 56s 343ms
=======================

Release-CLR-QEMU.md, Release-CLR-QEMU.xml, testclr_output.tar.gz

Build information and commands

GIT: 96b8a19dd6411ef3eb6643537218cd6164280f06
CI: 09909bfe3d23ad26455327811013bcbb48915255
REPO: dotnet/runtime
BRANCH: main
CONFIG: Release
LIB_CONFIG: Release

RISC-V Release-FX-QEMU: 626054 / 651127 (96.15%)

=======================
      passed: 626054
      failed: 1534
     skipped: 1456
      killed: 23539
------------------------
  TOTAL libs: 259
 TOTAL tests: 652583
   REAL time: 2h 31min 55s 461ms
=======================

Release-FX-QEMU.md, Release-FX-QEMU.xml, testfx_output.tar.gz

Build information and commands

GIT: 96b8a19dd6411ef3eb6643537218cd6164280f06
CI: 09909bfe3d23ad26455327811013bcbb48915255
REPO: dotnet/runtime
BRANCH: main
CONFIG: Release
LIB_CONFIG: Release

fuad1502 · 2025-04-11T10:01:29Z

Somehow the "Format jit codebase" check failed after pushing 96b8a19. Looking at the logs, it looks like an issue with the CI:

Formatting jit directory.
Can't find compile_commands.json file. Running configure.
Running: /__w/runtime/runtime/runtime/src/coreclr/build-runtime.sh x64 Release configureonly -cmakeargs -DCMAKE_EXPORT_COMPILE_COMMANDS=1
There was an error running CMake to generate compile_commands.json. Please run build-runtime.sh configureonly

The attached patch file is also empty.

am11 · 2025-04-11T13:41:15Z

This is a regression from #113899. I've opened #114538.

BruceForstall · 2025-04-11T23:40:29Z

I'm going to re-run the CI to ensure the format jobs aren't broken.

BruceForstall

LGTM. I'm worried there might be assumptions around the compiler than an instrDesc represents one instruction. I think there are already one or two exceptions (loop alignment and arm32 large branches come to mind) so maybe it's ok.

[RISC-V] Group load immediate instructions into a single instrDesc an…

d2ced94

…d print imm value in disasm

ghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Apr 10, 2025

dotnet-policy-service bot added the community-contribution Indicates that the PR has been added by a community member label Apr 10, 2025

fuad1502 commented Apr 10, 2025

View reviewed changes

src/coreclr/jit/emitriscv64.cpp Outdated Show resolved Hide resolved

am11 added the arch-riscv Related to the RISC-V architecture label Apr 10, 2025

build-analysis bot mentioned this pull request Apr 10, 2025

System.Diagnostics.Tests.ProcessTests.ProcessStart_OnLinux_UsesSpecifiedProgram [FAIL] #106595

Open

[RISC-V] Correct performance score for instrDescLoadImm

5331560

tomeksowi reviewed Apr 11, 2025

View reviewed changes

src/coreclr/jit/emitriscv64.cpp Outdated Show resolved Hide resolved

tomeksowi reviewed Apr 11, 2025

View reviewed changes

src/coreclr/jit/emitriscv64.cpp Outdated Show resolved Hide resolved

tomeksowi approved these changes Apr 11, 2025

View reviewed changes

[RISC-V] Fix typos

96b8a19

build-analysis bot mentioned this pull request Apr 11, 2025

The Operation will be canceled. The next steps may not contain expected logs. dotnet/dnceng#3008

Open

3 tasks

BruceForstall closed this Apr 11, 2025

BruceForstall reopened this Apr 11, 2025

BruceForstall approved these changes Apr 11, 2025

View reviewed changes

BruceForstall merged commit b8f318d into dotnet:main Apr 12, 2025
112 of 114 checks passed

github-actions bot locked and limited conversation to collaborators May 13, 2025

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

[RISC-V] Print load immediate value in disassembly #114470

[RISC-V] Print load immediate value in disassembly #114470

Uh oh!

fuad1502 commented Apr 10, 2025

Uh oh!

dotnet-policy-service bot commented Apr 10, 2025

Uh oh!

fuad1502 commented Apr 10, 2025

Size improvements/regressions per collection

PerfScore improvements/regressions per collection

Context information

jit-analyze output

Uh oh!

risc-vv commented Apr 10, 2025 •

edited

Loading

Uh oh!

Uh oh!

risc-vv commented Apr 10, 2025 •

edited

Loading

Uh oh!

Uh oh!

Uh oh!

risc-vv commented Apr 11, 2025 •

edited

Loading

Uh oh!

fuad1502 commented Apr 11, 2025

Uh oh!

am11 commented Apr 11, 2025

Uh oh!

BruceForstall commented Apr 11, 2025

Uh oh!

BruceForstall left a comment

Uh oh!

Uh oh!

Uh oh!

[RISC-V] Print load immediate value in disassembly #114470

[RISC-V] Print load immediate value in disassembly #114470

Uh oh!

Conversation

fuad1502 commented Apr 10, 2025

Uh oh!

dotnet-policy-service bot commented Apr 10, 2025

Uh oh!

fuad1502 commented Apr 10, 2025

Size improvements/regressions per collection

PerfScore improvements/regressions per collection

Context information

jit-analyze output

Uh oh!

risc-vv commented Apr 10, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

Uh oh!

risc-vv commented Apr 10, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

Uh oh!

Uh oh!

risc-vv commented Apr 11, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

fuad1502 commented Apr 11, 2025

Uh oh!

am11 commented Apr 11, 2025

Uh oh!

BruceForstall commented Apr 11, 2025

Uh oh!

BruceForstall left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

risc-vv commented Apr 10, 2025 •

edited

Loading

risc-vv commented Apr 10, 2025 •

edited

Loading

risc-vv commented Apr 11, 2025 •

edited

Loading