3de645efe3
Before we tracked the size of the teams reduction buffer in order to allocate it at runtime per kernel launch. This patch splits the number into two parts, the size of the reduction data (=all reduction variables) and the (maximal) length of the buffer. This will allow us to allocate less if we need less, e.g., if we have less teams than the maximal length. It also allows us to move code from clangs codegen into the runtime as we now know how large the reduction data is.
53 lines
2.3 KiB
LLVM
53 lines
2.3 KiB
LLVM
; RUN: opt -passes='default<O2>' -pass-remarks-missed=openmp-opt < %s 2>&1 | FileCheck %s --check-prefix=MODULE
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target datalayout = "e-i64:64-i128:128-v16:16-v32:32-n16:32:64"
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%struct.ConfigurationEnvironmentTy = type { i8, i8, i8, i32, i32, i32, i32, i32, i32 }
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%struct.KernelEnvironmentTy = type { %struct.ConfigurationEnvironmentTy, ptr, ptr }
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@.str = private unnamed_addr constant [13 x i8] c"Alloc Shared\00", align 1
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@S = external local_unnamed_addr global ptr
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@foo_kernel_environment = local_unnamed_addr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 1, i8 0, i8 1, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0 }, ptr null, ptr null }
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; MODULE: remark: openmp_opt_module.c:5:7: Found thread data sharing on the GPU. Expect degraded performance due to data globalization.
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define void @foo() "kernel" {
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entry:
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%i = call i32 @__kmpc_target_init(ptr @foo_kernel_environment)
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%x = call ptr @__kmpc_alloc_shared(i64 4), !dbg !10
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call void @use(ptr %x)
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call void @__kmpc_free_shared(ptr %x)
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call void @__kmpc_target_deinit()
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ret void
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}
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declare void @use(ptr %x)
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define weak ptr @__kmpc_alloc_shared(i64 %DataSize) {
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entry:
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%call = call ptr @_Z10SafeMallocmPKc(i64 %DataSize, ptr @.str) #11
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ret ptr %call
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}
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; Function Attrs: convergent nounwind mustprogress
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declare ptr @_Z10SafeMallocmPKc(i64 %size, ptr nocapture readnone %msg)
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declare void @__kmpc_free_shared(ptr)
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declare i32 @__kmpc_target_init(ptr)
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declare void @__kmpc_target_deinit()
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!nvvm.annotations = !{!7}
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!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)
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!1 = !DIFile(filename: "openmp_opt_module.c", directory: "/tmp/openmp_opt_module.c")
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!2 = !{}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"openmp", i32 50}
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!6 = !{i32 7, !"openmp-device", i32 50}
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!7 = !{ptr @foo, !"kernel", i32 1}
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!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!9 = !DISubroutineType(types: !2)
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!10 = !DILocation(line: 5, column: 7, scope: !8)
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