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clang-p2996/llvm/test/Transforms/OpenMP/replace_globalization.ll
Shilei Tian 10068cd654 [OpenMP] Introduce kernel environment 
This patch introduces per kernel environment. Previously, flags such as execution mode are set through global variables with name like `__kernel_name_exec_mode`. They are accessible on the host by reading the corresponding global variable, but not from the device. Besides, some assumptions, such as no nested parallelism, are not per kernel basis, preventing us applying per kernel optimization in the device runtime.

This is a combination and refinement of patch series D116908, D116909, and D116910.

Depend on D155886.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D142569
2023-07-26 13:35:14 -04:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals --include-generated-funcs
; RUN: opt -S -passes='openmp-opt' < %s | FileCheck %s
; RUN: opt -passes=openmp-opt -pass-remarks=openmp-opt -disable-output < %s 2>&1 | FileCheck %s -check-prefix=CHECK-REMARKS
; RUN: opt -passes=openmp-opt -pass-remarks=openmp-opt -pass-remarks-missed=openmp-opt -disable-output -openmp-opt-shared-limit=4 < %s 2>&1 | FileCheck %s -check-prefix=CHECK-LIMIT
target datalayout = "e-i64:64-i128:128-v16:16-v32:32-n16:32:64"
target triple = "nvptx64"
; UTC_ARGS: --disable
; CHECK-REMARKS: remark: replace_globalization.c:5:7: Replaced globalized variable with 16 bytes of shared memory
; CHECK-REMARKS: remark: replace_globalization.c:5:14: Replaced globalized variable with 4 bytes of shared memory
; CHECK-REMARKS-NOT: 6 bytes
; CHECK-LIMIT: remark: replace_globalization.c:5:14: Replaced globalized variable with 4 bytes of shared memory
; CHECK-LIMIT: remark: replace_globalization.c:5:7: Found thread data sharing on the GPU. Expect degraded performance due to data globalization
; UTC_ARGS: --enable
%struct.ident_t = type { i32, i32, i32, i32, ptr }
%struct.KernelEnvironmentTy = type { %struct.ConfigurationEnvironmentTy, ptr, ptr }
%struct.ConfigurationEnvironmentTy = type { i8, i8, i8 }
@S = external local_unnamed_addr global ptr
@0 = private unnamed_addr constant [113 x i8] c";llvm/test/Transforms/OpenMP/custom_state_machines_remarks.c;__omp_offloading_2a_d80d3d_test_fallback_l11;11;1;;\00", align 1
@1 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @0 }, align 8
@foo_kernel_environment = local_unnamed_addr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 0, i8 0, i8 1 }, ptr @1, ptr null }
@bar_kernel_environment = local_unnamed_addr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 0, i8 0, i8 1 }, ptr @1, ptr null }
@baz_kernel_environment = local_unnamed_addr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 0, i8 0, i8 2 }, ptr @1, ptr null }
define dso_local void @foo() "kernel" {
entry:
%c = call i32 @__kmpc_target_init(ptr @foo_kernel_environment)
%x = call align 4 ptr @__kmpc_alloc_shared(i64 4)
call void @unknown_no_openmp()
call void @use(ptr %x)
call void @__kmpc_free_shared(ptr %x, i64 4)
call void @__kmpc_target_deinit()
ret void
}
define void @bar() "kernel" {
%c = call i32 @__kmpc_target_init(ptr @bar_kernel_environment)
call void @unknown_no_openmp()
%cmp = icmp eq i32 %c, -1
br i1 %cmp, label %master1, label %exit
master1:
%x = call align 4 ptr @__kmpc_alloc_shared(i64 16), !dbg !11
call void @use(ptr %x)
call void @__kmpc_free_shared(ptr %x, i64 16)
br label %next
next:
call void @unknown_no_openmp()
%b0 = icmp eq i32 %c, -1
br i1 %b0, label %master2, label %exit
master2:
%y = call align 4 ptr @__kmpc_alloc_shared(i64 4), !dbg !12
call void @use(ptr %y)
call void @__kmpc_free_shared(ptr %y, i64 4)
br label %exit
exit:
call void @__kmpc_target_deinit()
ret void
}
define void @baz_spmd() "kernel" {
%c = call i32 @__kmpc_target_init(ptr @baz_kernel_environment)
call void @unknown_no_openmp()
%c0 = icmp eq i32 %c, -1
br i1 %c0, label %master3, label %exit
master3:
%z = call align 4 ptr @__kmpc_alloc_shared(i64 24), !dbg !12
call void @use(ptr %z)
call void @__kmpc_free_shared(ptr %z, i64 24)
br label %exit
exit:
call void @__kmpc_target_deinit()
ret void
}
define void @use(ptr %x) {
entry:
store ptr %x, ptr @S
ret void
}
@offset =global i32 undef
@stack = internal addrspace(3) global [1024 x i8] undef
define private ptr @__kmpc_alloc_shared(i64) {
%ac = addrspacecast ptr addrspace(3) @stack to ptr
%l = load i32, ptr @offset
%gep = getelementptr i8, ptr %ac, i32 %l
ret ptr %gep
}
declare void @__kmpc_free_shared(ptr, i64)
declare i32 @llvm.nvvm.read.ptx.sreg.tid.x()
declare i32 @llvm.nvvm.read.ptx.sreg.ntid.x()
declare i32 @llvm.nvvm.read.ptx.sreg.warpsize()
; Make it a weak definition so we will apply custom state machine rewriting but can't use the body in the reasoning.
define weak i32 @__kmpc_target_init(ptr) {
ret i32 0
}
declare void @__kmpc_target_deinit()
declare void @unknown_no_openmp() "llvm.assume"="omp_no_openmp"
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!nvvm.annotations = !{!7, !8, !13}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "replace_globalization.c", directory: "/tmp/replace_globalization.c")
!2 = !{}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{i32 1, !"wchar_size", i32 4}
!5 = !{i32 7, !"openmp", i32 50}
!6 = !{i32 7, !"openmp-device", i32 50}
!7 = !{ptr @foo, !"kernel", i32 1}
!8 = !{ptr @bar, !"kernel", i32 1}
!13 = !{ptr @baz_spmd, !"kernel", i32 1}
!9 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 1, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!10 = !DISubroutineType(types: !2)
!11 = !DILocation(line: 5, column: 7, scope: !9)
!12 = !DILocation(line: 5, column: 14, scope: !9)
;.
; CHECK: @[[S:[a-zA-Z0-9_$"\\.-]+]] = external local_unnamed_addr global ptr
; CHECK: @[[GLOB0:[0-9]+]] = private unnamed_addr constant [113 x i8] c"
; CHECK: @[[GLOB1:[0-9]+]] = private unnamed_addr constant [[STRUCT_IDENT_T:%.*]] { i32 0, i32 2, i32 0, i32 0, ptr @[[GLOB0]] }, align 8
; CHECK: @[[FOO_KERNEL_ENVIRONMENT:[a-zA-Z0-9_$"\\.-]+]] = local_unnamed_addr constant [[STRUCT_KERNELENVIRONMENTTY:%.*]] { [[STRUCT_CONFIGURATIONENVIRONMENTTY:%.*]] { i8 0, i8 0, i8 1 }, ptr @[[GLOB1]], ptr null }
; CHECK: @[[BAR_KERNEL_ENVIRONMENT:[a-zA-Z0-9_$"\\.-]+]] = local_unnamed_addr constant [[STRUCT_KERNELENVIRONMENTTY:%.*]] { [[STRUCT_CONFIGURATIONENVIRONMENTTY:%.*]] { i8 0, i8 0, i8 1 }, ptr @[[GLOB1]], ptr null }
; CHECK: @[[BAZ_KERNEL_ENVIRONMENT:[a-zA-Z0-9_$"\\.-]+]] = local_unnamed_addr constant [[STRUCT_KERNELENVIRONMENTTY:%.*]] { [[STRUCT_CONFIGURATIONENVIRONMENTTY:%.*]] { i8 0, i8 0, i8 2 }, ptr @[[GLOB1]], ptr null }
; CHECK: @[[OFFSET:[a-zA-Z0-9_$"\\.-]+]] = global i32 undef
; CHECK: @[[STACK:[a-zA-Z0-9_$"\\.-]+]] = internal addrspace(3) global [1024 x i8] undef
; CHECK: @[[X_SHARED:[a-zA-Z0-9_$"\\.-]+]] = internal addrspace(3) global [16 x i8] poison, align 4
; CHECK: @[[Y_SHARED:[a-zA-Z0-9_$"\\.-]+]] = internal addrspace(3) global [4 x i8] poison, align 4
;.
; CHECK-LABEL: define {{[^@]+}}@foo
; CHECK-SAME: () #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C:%.*]] = call i32 @__kmpc_target_init(ptr @foo_kernel_environment)
; CHECK-NEXT: [[X:%.*]] = call align 4 ptr @__kmpc_alloc_shared(i64 4) #[[ATTR6:[0-9]+]]
; CHECK-NEXT: call void @unknown_no_openmp() #[[ATTR5:[0-9]+]]
; CHECK-NEXT: call void @use.internalized(ptr nofree [[X]]) #[[ATTR7:[0-9]+]]
; CHECK-NEXT: call void @__kmpc_free_shared(ptr [[X]], i64 4) #[[ATTR8:[0-9]+]]
; CHECK-NEXT: call void @__kmpc_target_deinit()
; CHECK-NEXT: ret void
;
;
; CHECK-LABEL: define {{[^@]+}}@bar
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: [[C:%.*]] = call i32 @__kmpc_target_init(ptr @bar_kernel_environment)
; CHECK-NEXT: call void @unknown_no_openmp() #[[ATTR5]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C]], -1
; CHECK-NEXT: br i1 [[CMP]], label [[MASTER1:%.*]], label [[EXIT:%.*]]
; CHECK: master1:
; CHECK-NEXT: call void @use.internalized(ptr nofree addrspacecast (ptr addrspace(3) @x_shared to ptr)) #[[ATTR7]]
; CHECK-NEXT: br label [[NEXT:%.*]]
; CHECK: next:
; CHECK-NEXT: call void @unknown_no_openmp() #[[ATTR5]]
; CHECK-NEXT: [[B0:%.*]] = icmp eq i32 [[C]], -1
; CHECK-NEXT: br i1 [[B0]], label [[MASTER2:%.*]], label [[EXIT]]
; CHECK: master2:
; CHECK-NEXT: call void @use.internalized(ptr nofree addrspacecast (ptr addrspace(3) @y_shared to ptr)) #[[ATTR7]]
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: call void @__kmpc_target_deinit()
; CHECK-NEXT: ret void
;
;
; CHECK-LABEL: define {{[^@]+}}@baz_spmd
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: [[C:%.*]] = call i32 @__kmpc_target_init(ptr @baz_kernel_environment)
; CHECK-NEXT: call void @unknown_no_openmp() #[[ATTR5]]
; CHECK-NEXT: [[C0:%.*]] = icmp eq i32 [[C]], -1
; CHECK-NEXT: br i1 [[C0]], label [[MASTER3:%.*]], label [[EXIT:%.*]]
; CHECK: master3:
; CHECK-NEXT: [[Z:%.*]] = call align 4 ptr @__kmpc_alloc_shared(i64 24) #[[ATTR6]], !dbg [[DBG10:![0-9]+]]
; CHECK-NEXT: call void @use.internalized(ptr nofree [[Z]]) #[[ATTR7]]
; CHECK-NEXT: call void @__kmpc_free_shared(ptr [[Z]], i64 24) #[[ATTR8]]
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: call void @__kmpc_target_deinit()
; CHECK-NEXT: ret void
;
;
; CHECK: Function Attrs: nofree norecurse nosync nounwind memory(write)
; CHECK-LABEL: define {{[^@]+}}@use.internalized
; CHECK-SAME: (ptr nofree [[X:%.*]]) #[[ATTR1:[0-9]+]] {
; CHECK-NEXT: entry:
; CHECK-NEXT: store ptr [[X]], ptr @S, align 8
; CHECK-NEXT: ret void
;
;
; CHECK-LABEL: define {{[^@]+}}@use
; CHECK-SAME: (ptr [[X:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: store ptr [[X]], ptr @S, align 8
; CHECK-NEXT: ret void
;
;
; CHECK: Function Attrs: norecurse nosync nounwind allocsize(0) memory(read)
; CHECK-LABEL: define {{[^@]+}}@__kmpc_alloc_shared
; CHECK-SAME: (i64 [[TMP0:%.*]]) #[[ATTR2:[0-9]+]] {
; CHECK-NEXT: [[L:%.*]] = load i32, ptr @offset, align 4
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, ptr addrspacecast (ptr addrspace(3) @stack to ptr), i32 [[L]]
; CHECK-NEXT: ret ptr [[GEP]]
;
;
; CHECK-LABEL: define {{[^@]+}}@__kmpc_target_init
; CHECK-SAME: (ptr [[TMP0:%.*]]) {
; CHECK-NEXT: ret i32 0
;
;.
; CHECK: attributes #[[ATTR0]] = { "kernel" }
; CHECK: attributes #[[ATTR1]] = { nofree norecurse nosync nounwind memory(write) }
; CHECK: attributes #[[ATTR2]] = { norecurse nosync nounwind allocsize(0) memory(read) }
; CHECK: attributes #[[ATTR3:[0-9]+]] = { nosync nounwind }
; CHECK: attributes #[[ATTR4:[0-9]+]] = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
; CHECK: attributes #[[ATTR5]] = { "llvm.assume"="omp_no_openmp" }
; CHECK: attributes #[[ATTR6]] = { nounwind memory(read) }
; CHECK: attributes #[[ATTR7]] = { nosync nounwind memory(write) }
; CHECK: attributes #[[ATTR8]] = { nounwind }
;.
; CHECK: [[META0:![0-9]+]] = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
; CHECK: [[META1:![0-9]+]] = !DIFile(filename: "replace_globalization.c", directory: "/tmp/replace_globalization.c")
; CHECK: [[META2:![0-9]+]] = !{}
; CHECK: [[META3:![0-9]+]] = !{i32 2, !"Debug Info Version", i32 3}
; CHECK: [[META4:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
; CHECK: [[META5:![0-9]+]] = !{i32 7, !"openmp", i32 50}
; CHECK: [[META6:![0-9]+]] = !{i32 7, !"openmp-device", i32 50}
; CHECK: [[META7:![0-9]+]] = !{ptr @foo, !"kernel", i32 1}
; CHECK: [[META8:![0-9]+]] = !{ptr @bar, !"kernel", i32 1}
; CHECK: [[META9:![0-9]+]] = !{ptr @baz_spmd, !"kernel", i32 1}
; CHECK: [[DBG10]] = !DILocation(line: 5, column: 14, scope: !11)
; CHECK: [[META11:![0-9]+]] = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 1, type: !12, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
; CHECK: [[META12:![0-9]+]] = !DISubroutineType(types: !2)
;.
;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
; CHECK-LIMIT: {{.*}}
; CHECK-REMARKS: {{.*}}
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