d9659bf6a0
In the spirit of TRegions [0], this patch creates a custom state machine for a generic target region based on the potentially called parallel regions. The code analysis is done interprocedurally via an abstract attribute (AAKernelInfo). All outermost parallel regions are collected and we check if there might be unknown outermost parallel regions for which we need an indirect call. Other AAKernelInfo extensions are expected. [0] https://link.springer.com/chapter/10.1007/978-3-030-28596-8_11 Differential Revision: https://reviews.llvm.org/D101977
54 lines
2.3 KiB
LLVM
54 lines
2.3 KiB
LLVM
; RUN: opt -O2 -pass-remarks-missed=openmp-opt -enable-new-pm < %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.ident_t = type { i32, i32, i32, i32, i8* }
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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 i8*
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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() {
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entry:
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%i = call i32 @__kmpc_target_init(%struct.ident_t* null, i1 false, i1 true, i1 true)
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%x = call i8* @__kmpc_alloc_shared(i64 4), !dbg !10
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%x_on_stack = bitcast i8* %x to i32*
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%0 = bitcast i32* %x_on_stack to i8*
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call void @use(i8* %0)
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call void @__kmpc_free_shared(i8* %x)
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call void @__kmpc_target_deinit(%struct.ident_t* null, i1 false, i1 true)
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ret void
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}
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declare void @use(i8* %0)
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define weak i8* @__kmpc_alloc_shared(i64 %DataSize) {
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entry:
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%call = call i8* @_Z10SafeMallocmPKc(i64 %DataSize, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0)) #11
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ret i8* %call
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}
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; Function Attrs: convergent nounwind mustprogress
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declare i8* @_Z10SafeMallocmPKc(i64 %size, i8* nocapture readnone %msg)
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declare void @__kmpc_free_shared(i8*)
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declare i32 @__kmpc_target_init(%struct.ident_t*, i1, i1 %use_generic_state_machine, i1)
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declare void @__kmpc_target_deinit(%struct.ident_t*, i1, i1)
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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 = !{void ()* @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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