caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
8fcb1263f42657ecbc355beff12500dfbcddee17
clang-p2996/llvm/test/Analysis/KernelInfo/openmp/amdgpu.ll
Joel E. Denny 18f8106f31 [KernelInfo] Implement new LLVM IR pass for GPU code analysis (#102944) 
This patch implements an LLVM IR pass, named kernel-info, that reports
various statistics for codes compiled for GPUs. The ultimate goal of
these statistics to help identify bad code patterns and ways to mitigate
them. The pass operates at the LLVM IR level so that it can, in theory,
support any LLVM-based compiler for programming languages supporting
GPUs. It has been tested so far with LLVM IR generated by Clang for
OpenMP offload codes targeting NVIDIA GPUs and AMD GPUs.

By default, the pass runs at the end of LTO, and options like
``-Rpass=kernel-info`` enable its remarks. Example `opt` and `clang`
command lines appear in `llvm/docs/KernelInfo.rst`. Remarks include
summary statistics (e.g., total size of static allocas) and individual
occurrences (e.g., source location of each alloca). Examples of its
output appear in tests in `llvm/test/Analysis/KernelInfo`.
2025-01-29 12:40:19 -05:00

226 lines
17 KiB
LLVM
Raw Blame History

; See ./README.md for how to maintain the LLVM IR in this test.
; REQUIRES: amdgpu-registered-target
; RUN: opt -pass-remarks=kernel-info -passes=kernel-info \
; RUN: -disable-output %s 2>&1 | \
; RUN: FileCheck -match-full-lines %s
; CHECK-NOT: remark:
; CHECK: remark: test.c:0:0: in artificial function '[[OFF_FUNC:__omp_offloading_[a-f0-9_]*_h_l12]]_debug__', artificial alloca ('%[[#]]') for 'dyn_ptr' with static size of 8 bytes
; CHECK-NEXT: remark: test.c:14:9: in artificial function '[[OFF_FUNC]]_debug__', alloca ('%[[#]]') for 'i' with static size of 4 bytes
; CHECK-NEXT: remark: test.c:15:9: in artificial function '[[OFF_FUNC]]_debug__', alloca ('%[[#]]') for 'a' with static size of 8 bytes
; CHECK-NEXT: remark: <unknown>:0:0: in artificial function '[[OFF_FUNC]]_debug__', 'store' instruction accesses memory in flat address space
; CHECK-NEXT: remark: test.c:13:3: in artificial function '[[OFF_FUNC]]_debug__', direct call, callee is '@__kmpc_target_init'
; CHECK-NEXT: remark: test.c:16:5: in artificial function '[[OFF_FUNC]]_debug__', direct call, callee is '@f'
; CHECK-NEXT: remark: test.c:17:5: in artificial function '[[OFF_FUNC]]_debug__', direct call to defined function, callee is 'g'
; CHECK-NEXT: remark: test.c:18:3: in artificial function '[[OFF_FUNC]]_debug__', direct call, callee is '@__kmpc_target_deinit'
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', ExternalNotKernel = 0
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', amdgpu-max-num-workgroups[0] = 4294967295
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', amdgpu-max-num-workgroups[1] = 4294967295
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', amdgpu-max-num-workgroups[2] = 4294967295
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', amdgpu-flat-work-group-size[0] = 1
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', amdgpu-flat-work-group-size[1] = 1024
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', amdgpu-waves-per-eu[0] = 4
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', amdgpu-waves-per-eu[1] = 10
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', Allocas = 3
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', AllocasStaticSizeSum = 20
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', AllocasDyn = 0
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', DirectCalls = 4
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', IndirectCalls = 0
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', DirectCallsToDefinedFunctions = 1
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', InlineAssemblyCalls = 0
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', Invokes = 0
; CHECK-NEXT: remark: test.c:13:0: in artificial function '[[OFF_FUNC]]_debug__', FlatAddrspaceAccesses = 1
; CHECK-NEXT: remark: test.c:0:0: in artificial function '[[OFF_FUNC]]', artificial alloca ('%[[#]]') for 'dyn_ptr' with static size of 8 bytes
; CHECK-NEXT: remark: <unknown>:0:0: in artificial function '[[OFF_FUNC]]', 'store' instruction accesses memory in flat address space
; CHECK-NEXT: remark: test.c:12:1: in artificial function '[[OFF_FUNC]]', 'load' instruction ('%[[#]]') accesses memory in flat address space
; CHECK-NEXT: remark: test.c:12:1: in artificial function '[[OFF_FUNC]]', direct call to defined function, callee is artificial '[[OFF_FUNC]]_debug__'
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', ExternalNotKernel = 0
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', omp_target_thread_limit = 256
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', amdgpu-max-num-workgroups[0] = 4294967295
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', amdgpu-max-num-workgroups[1] = 4294967295
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', amdgpu-max-num-workgroups[2] = 4294967295
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', amdgpu-flat-work-group-size[0] = 1
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', amdgpu-flat-work-group-size[1] = 256
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', amdgpu-waves-per-eu[0] = 1
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', amdgpu-waves-per-eu[1] = 10
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', Allocas = 1
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', AllocasStaticSizeSum = 8
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', AllocasDyn = 0
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', DirectCalls = 1
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', IndirectCalls = 0
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', DirectCallsToDefinedFunctions = 1
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', InlineAssemblyCalls = 0
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', Invokes = 0
; CHECK-NEXT: remark: test.c:12:0: in artificial function '[[OFF_FUNC]]', FlatAddrspaceAccesses = 2
; CHECK-NEXT: remark: test.c:4:7: in function 'g', alloca ('%[[#]]') for 'i' with static size of 4 bytes
; CHECK-NEXT: remark: test.c:5:7: in function 'g', alloca ('%[[#]]') for 'a' with static size of 8 bytes
; CHECK-NEXT: remark: test.c:6:3: in function 'g', direct call, callee is '@f'
; CHECK-NEXT: remark: test.c:7:3: in function 'g', direct call to defined function, callee is 'g'
; CHECK-NEXT: remark: test.c:3:0: in function 'g', ExternalNotKernel = 1
; CHECK-NEXT: remark: test.c:3:0: in function 'g', amdgpu-max-num-workgroups[0] = 4294967295
; CHECK-NEXT: remark: test.c:3:0: in function 'g', amdgpu-max-num-workgroups[1] = 4294967295
; CHECK-NEXT: remark: test.c:3:0: in function 'g', amdgpu-max-num-workgroups[2] = 4294967295
; CHECK-NEXT: remark: test.c:3:0: in function 'g', amdgpu-flat-work-group-size[0] = 1
; CHECK-NEXT: remark: test.c:3:0: in function 'g', amdgpu-flat-work-group-size[1] = 1024
; CHECK-NEXT: remark: test.c:3:0: in function 'g', amdgpu-waves-per-eu[0] = 4
; CHECK-NEXT: remark: test.c:3:0: in function 'g', amdgpu-waves-per-eu[1] = 10
; CHECK-NEXT: remark: test.c:3:0: in function 'g', Allocas = 2
; CHECK-NEXT: remark: test.c:3:0: in function 'g', AllocasStaticSizeSum = 12
; CHECK-NEXT: remark: test.c:3:0: in function 'g', AllocasDyn = 0
; CHECK-NEXT: remark: test.c:3:0: in function 'g', DirectCalls = 2
; CHECK-NEXT: remark: test.c:3:0: in function 'g', IndirectCalls = 0
; CHECK-NEXT: remark: test.c:3:0: in function 'g', DirectCallsToDefinedFunctions = 1
; CHECK-NEXT: remark: test.c:3:0: in function 'g', InlineAssemblyCalls = 0
; CHECK-NEXT: remark: test.c:3:0: in function 'g', Invokes = 0
; CHECK-NEXT: remark: test.c:3:0: in function 'g', FlatAddrspaceAccesses = 0
; CHECK-NOT: {{.}}
; ModuleID = 'test-openmp-amdgcn-amd-amdhsa-gfx906.bc'
source_filename = "test.c"
target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-p7:160:256:256:32-p8:128:128-p9:192:256:256:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5-G1-ni:7:8:9"
target triple = "amdgcn-amd-amdhsa"
%struct.ident_t = type { i32, i32, i32, i32, ptr }
%struct.DynamicEnvironmentTy = type { i16 }
%struct.KernelEnvironmentTy = type { %struct.ConfigurationEnvironmentTy, ptr, ptr }
%struct.ConfigurationEnvironmentTy = type { i8, i8, i8, i32, i32, i32, i32, i32, i32 }
@__omp_rtl_debug_kind = weak_odr hidden addrspace(1) constant i32 0
@__omp_rtl_assume_teams_oversubscription = weak_odr hidden addrspace(1) constant i32 0
@__omp_rtl_assume_threads_oversubscription = weak_odr hidden addrspace(1) constant i32 0
@__omp_rtl_assume_no_thread_state = weak_odr hidden addrspace(1) constant i32 0
@__omp_rtl_assume_no_nested_parallelism = weak_odr hidden addrspace(1) constant i32 0
@0 = private unnamed_addr constant [57 x i8] c";test.c;__omp_offloading_fd02_727e9_h_l12_debug__;13;3;;\00", align 1
@1 = private unnamed_addr addrspace(1) constant %struct.ident_t { i32 0, i32 2, i32 0, i32 56, ptr @0 }, align 8
@__omp_offloading_fd02_727e9_h_l12_dynamic_environment = weak_odr protected addrspace(1) global %struct.DynamicEnvironmentTy zeroinitializer
@__omp_offloading_fd02_727e9_h_l12_kernel_environment = weak_odr protected addrspace(1) constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 1, i8 1, i8 1, i32 1, i32 256, i32 -1, i32 -1, i32 0, i32 0 }, ptr addrspacecast (ptr addrspace(1) @1 to ptr), ptr addrspacecast (ptr addrspace(1) @__omp_offloading_fd02_727e9_h_l12_dynamic_environment to ptr) }
@__oclc_ABI_version = weak_odr hidden local_unnamed_addr addrspace(4) constant i32 500
; Function Attrs: convergent noinline norecurse nounwind optnone
define internal void @__omp_offloading_fd02_727e9_h_l12_debug__(ptr noalias noundef %0) #0 !dbg !15 {
%2 = alloca ptr, align 8, addrspace(5)
%3 = alloca i32, align 4, addrspace(5)
%4 = alloca [2 x i32], align 4, addrspace(5)
%5 = addrspacecast ptr addrspace(5) %2 to ptr
%6 = addrspacecast ptr addrspace(5) %3 to ptr
%7 = addrspacecast ptr addrspace(5) %4 to ptr
store ptr %0, ptr %5, align 8
#dbg_declare(ptr addrspace(5) %2, !23, !DIExpression(), !24)
%8 = call i32 @__kmpc_target_init(ptr addrspacecast (ptr addrspace(1) @__omp_offloading_fd02_727e9_h_l12_kernel_environment to ptr), ptr %0), !dbg !25
%9 = icmp eq i32 %8, -1, !dbg !25
br i1 %9, label %10, label %11, !dbg !25
10: ; preds = %1
#dbg_declare(ptr addrspace(5) %3, !26, !DIExpression(), !29)
#dbg_declare(ptr addrspace(5) %4, !30, !DIExpression(), !34)
call void @f() #4, !dbg !35
call void @g() #4, !dbg !36
call void @__kmpc_target_deinit(), !dbg !37
ret void, !dbg !38
11: ; preds = %1
ret void, !dbg !25
}
; Function Attrs: convergent mustprogress noinline norecurse nounwind optnone
define weak_odr protected amdgpu_kernel void @__omp_offloading_fd02_727e9_h_l12(ptr noalias noundef %0) #1 !dbg !39 {
%2 = alloca ptr, align 8, addrspace(5)
%3 = addrspacecast ptr addrspace(5) %2 to ptr
store ptr %0, ptr %3, align 8
#dbg_declare(ptr addrspace(5) %2, !40, !DIExpression(), !41)
%4 = load ptr, ptr %3, align 8, !dbg !42
call void @__omp_offloading_fd02_727e9_h_l12_debug__(ptr %4) #5, !dbg !42
ret void, !dbg !42
}
declare i32 @__kmpc_target_init(ptr, ptr)
; Function Attrs: convergent
declare void @f(...) #2
declare void @__kmpc_target_deinit()
; Function Attrs: convergent noinline nounwind optnone
define hidden void @g() #3 !dbg !43 {
%1 = alloca i32, align 4, addrspace(5)
%2 = alloca [2 x i32], align 4, addrspace(5)
%3 = addrspacecast ptr addrspace(5) %1 to ptr
%4 = addrspacecast ptr addrspace(5) %2 to ptr
#dbg_declare(ptr addrspace(5) %1, !46, !DIExpression(), !47)
#dbg_declare(ptr addrspace(5) %2, !48, !DIExpression(), !49)
call void @f() #4, !dbg !50
call void @g() #4, !dbg !51
ret void, !dbg !52
}
attributes #0 = { convergent noinline norecurse nounwind optnone "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="gfx906" "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot10-insts,+dot2-insts,+dot7-insts,+dpp,+gfx8-insts,+gfx9-insts,+s-memrealtime,+s-memtime-inst,+wavefrontsize64" }
attributes #1 = { convergent mustprogress noinline norecurse nounwind optnone "amdgpu-flat-work-group-size"="1,256" "frame-pointer"="all" "kernel" "no-trapping-math"="true" "omp_target_thread_limit"="256" "stack-protector-buffer-size"="8" "target-cpu"="gfx906" "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot10-insts,+dot2-insts,+dot7-insts,+dpp,+gfx8-insts,+gfx9-insts,+s-memrealtime,+s-memtime-inst,+wavefrontsize64" "uniform-work-group-size"="true" }
attributes #2 = { convergent "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="gfx906" "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot10-insts,+dot2-insts,+dot7-insts,+dpp,+gfx8-insts,+gfx9-insts,+s-memrealtime,+s-memtime-inst,+wavefrontsize64" }
attributes #3 = { convergent noinline nounwind optnone "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="gfx906" "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot10-insts,+dot2-insts,+dot7-insts,+dpp,+gfx8-insts,+gfx9-insts,+s-memrealtime,+s-memtime-inst,+wavefrontsize64" }
attributes #4 = { convergent }
attributes #5 = { nounwind }
!llvm.dbg.cu = !{!0}
!omp_offload.info = !{!2}
!llvm.module.flags = !{!3, !4, !5, !6, !7, !8, !9, !10, !11}
!llvm.ident = !{!12, !13, !13, !13, !13, !13, !13, !13, !13, !13, !13, !13, !13, !13, !13, !13, !13}
!opencl.ocl.version = !{!14, !14, !14, !14, !14, !14, !14, !14, !14, !14, !14, !14, !14, !14, !14, !14}
!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 20.0.0git (/tmp/llvm/clang b9447c03a9ef2eed55b685a33511df86f7f94e89)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: "/tmp", checksumkind: CSK_MD5, checksum: "27a878d5e894ab6d41bfe96f997f8821")
!2 = !{i32 0, i32 64770, i32 468969, !"h", i32 12, i32 0, i32 0}
!3 = !{i32 1, !"amdhsa_code_object_version", i32 500}
!4 = !{i32 7, !"Dwarf Version", i32 5}
!5 = !{i32 2, !"Debug Info Version", i32 3}
!6 = !{i32 1, !"wchar_size", i32 4}
!7 = !{i32 7, !"openmp", i32 51}
!8 = !{i32 7, !"openmp-device", i32 51}
!9 = !{i32 8, !"PIC Level", i32 2}
!10 = !{i32 7, !"frame-pointer", i32 2}
!11 = !{i32 4, !"amdgpu_hostcall", i32 1}
!12 = !{!"clang version 20.0.0git (/tmp/llvm/clang b9447c03a9ef2eed55b685a33511df86f7f94e89)"}
!13 = !{!"AMD clang version 17.0.0 (https://github.com/RadeonOpenCompute/llvm-project roc-6.0.2 24012 af27734ed982b52a9f1be0f035ac91726fc697e4)"}
!14 = !{i32 2, i32 0}
!15 = distinct !DISubprogram(name: "__omp_offloading_fd02_727e9_h_l12_debug__", scope: !16, file: !16, line: 13, type: !17, scopeLine: 13, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !0, retainedNodes: !22)
!16 = !DIFile(filename: "test.c", directory: "/tmp")
!17 = !DISubroutineType(types: !18)
!18 = !{null, !19}
!19 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !20)
!20 = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: !21)
!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
!22 = !{}
!23 = !DILocalVariable(name: "dyn_ptr", arg: 1, scope: !15, type: !19, flags: DIFlagArtificial)
!24 = !DILocation(line: 0, scope: !15)
!25 = !DILocation(line: 13, column: 3, scope: !15)
!26 = !DILocalVariable(name: "i", scope: !27, file: !16, line: 14, type: !28)
!27 = distinct !DILexicalBlock(scope: !15, file: !16, line: 13, column: 3)
!28 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!29 = !DILocation(line: 14, column: 9, scope: !27)
!30 = !DILocalVariable(name: "a", scope: !27, file: !16, line: 15, type: !31)
!31 = !DICompositeType(tag: DW_TAG_array_type, baseType: !28, size: 64, elements: !32)
!32 = !{!33}
!33 = !DISubrange(count: 2)
!34 = !DILocation(line: 15, column: 9, scope: !27)
!35 = !DILocation(line: 16, column: 5, scope: !27)
!36 = !DILocation(line: 17, column: 5, scope: !27)
!37 = !DILocation(line: 18, column: 3, scope: !27)
!38 = !DILocation(line: 18, column: 3, scope: !15)
!39 = distinct !DISubprogram(name: "__omp_offloading_fd02_727e9_h_l12", scope: !16, file: !16, line: 12, type: !17, scopeLine: 12, flags: DIFlagArtificial | DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !0, retainedNodes: !22)
!40 = !DILocalVariable(name: "dyn_ptr", arg: 1, scope: !39, type: !19, flags: DIFlagArtificial)
!41 = !DILocation(line: 0, scope: !39)
!42 = !DILocation(line: 12, column: 1, scope: !39)
!43 = distinct !DISubprogram(name: "g", scope: !16, file: !16, line: 3, type: !44, scopeLine: 3, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !22)
!44 = !DISubroutineType(types: !45)
!45 = !{null}
!46 = !DILocalVariable(name: "i", scope: !43, file: !16, line: 4, type: !28)
!47 = !DILocation(line: 4, column: 7, scope: !43)
!48 = !DILocalVariable(name: "a", scope: !43, file: !16, line: 5, type: !31)
!49 = !DILocation(line: 5, column: 7, scope: !43)
!50 = !DILocation(line: 6, column: 3, scope: !43)
!51 = !DILocation(line: 7, column: 3, scope: !43)
!52 = !DILocation(line: 8, column: 1, scope: !43)
Reference in New Issue View Git Blame Copy Permalink