10068cd654
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
55 lines
2.4 KiB
LLVM
55 lines
2.4 KiB
LLVM
; RUN: opt -passes=openmp-opt -pass-remarks-missed=openmp-opt -disable-output < %s 2>&1 | FileCheck %s
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; ModuleID = 'declare_target_codegen_globalization.cpp'
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source_filename = "declare_target_codegen_globalization.cpp"
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target datalayout = "e-i64:64-i128:128-v16:16-v32:32-n16:32:64"
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target triple = "nvptx64"
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; CHECK: remark: globalization_remarks.c:5:7: Could not move globalized variable to the stack. Variable is potentially captured in call. Mark parameter as `__attribute__((noescape))` to override.
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; CHECK: remark: globalization_remarks.c:5:7: Found thread data sharing on the GPU. Expect degraded performance due to data globalization.
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%struct.KernelEnvironmentTy = type { %struct.ConfigurationEnvironmentTy, ptr, ptr }
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%struct.ConfigurationEnvironmentTy = type { i8, i8, i8 }
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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 0, i8 0, i8 1 }, ptr null, ptr null }
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define void @foo() "kernel" {
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entry:
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%c = call i32 @__kmpc_target_init(ptr @foo_kernel_environment)
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%0 = call ptr @__kmpc_alloc_shared(i64 4), !dbg !10
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call void @share(ptr %0), !dbg !10
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call void @__kmpc_free_shared(ptr %0)
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call void @__kmpc_target_deinit()
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ret void
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}
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define internal void @share(ptr %x) {
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entry:
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store ptr %x, ptr @S
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ret void
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}
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declare ptr @__kmpc_alloc_shared(i64)
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declare void @__kmpc_free_shared(ptr nocapture)
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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, !8}
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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: "globalization_remarks.c", directory: "/tmp/globalization_remarks.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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