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
126 lines
5.1 KiB
LLVM
126 lines
5.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
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; RUN: opt -S -passes=openmp-opt < %s | FileCheck %s
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; RUN: opt -passes=openmp-opt -pass-remarks=openmp-opt -pass-remarks-missed=openmp-opt -disable-output < %s 2>&1 | FileCheck %s -check-prefix=CHECK-REMARKS
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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-REMARKS: remark: remove_globalization.c:4:2: Could not move globalized variable to the stack as variable is potentially captured in call; mark parameter as `__attribute__((noescape))` to override.
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; CHECK-REMARKS: remark: remove_globalization.c:2:2: Moving globalized variable to the stack.
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; CHECK-REMARKS: remark: remove_globalization.c:6:2: Moving globalized variable to the stack.
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; CHECK-REMARKS: remark: remove_globalization.c:4:2: Found thread data sharing on the GPU. Expect degraded performance due to data globalization.
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@S = external local_unnamed_addr global i8*
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%struct.ident_t = type { i32, i32, i32, i32, i8* }
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declare i32 @__kmpc_target_init(%struct.ident_t*, i1, i1, i1)
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declare void @__kmpc_target_deinit(%struct.ident_t*, i1, i1)
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define void @kernel() {
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; CHECK-LABEL: define {{[^@]+}}@kernel() {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = call i32 @__kmpc_target_init(%struct.ident_t* nonnull null, i1 false, i1 false, i1 true)
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; CHECK-NEXT: call void @foo() #[[ATTR0:[0-9]+]]
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; CHECK-NEXT: call void @bar() #[[ATTR0]]
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; CHECK-NEXT: call void @__kmpc_target_deinit(%struct.ident_t* nonnull null, i1 false, i1 true)
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; CHECK-NEXT: ret void
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entry:
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%0 = call i32 @__kmpc_target_init(%struct.ident_t* nonnull null, i1 false, i1 true, i1 true)
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call void @foo()
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call void @bar()
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call void @__kmpc_target_deinit(%struct.ident_t* nonnull null, i1 false, i1 true)
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ret void
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}
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define internal void @foo() {
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; CHECK-LABEL: define {{[^@]+}}@foo
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; CHECK-SAME: () #[[ATTR0]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = alloca i8, i64 4, align 1
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = call i8* @__kmpc_alloc_shared(i64 4), !dbg !12
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call void @use(i8* %0)
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call void @__kmpc_free_shared(i8* %0)
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ret void
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}
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define internal void @bar() {
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; CHECK-LABEL: define {{[^@]+}}@bar
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; CHECK-SAME: () #[[ATTR0]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = call i8* @__kmpc_alloc_shared(i64 noundef 4) #[[ATTR0]], !dbg [[DBG8:![0-9]+]]
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; CHECK-NEXT: call void @share(i8* nofree writeonly [[TMP0]]) #[[ATTR3:[0-9]+]]
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; CHECK-NEXT: call void @__kmpc_free_shared(i8* [[TMP0]]) #[[ATTR0]]
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = call i8* @__kmpc_alloc_shared(i64 4), !dbg !13
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call void @share(i8* %0)
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call void @__kmpc_free_shared(i8* %0)
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ret void
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}
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define internal void @use(i8* %x) {
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; CHECK-LABEL: define {{[^@]+}}@use
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; CHECK-SAME: (i8* noalias nocapture nofree readnone [[X:%.*]]) #[[ATTR1:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret void
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;
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entry:
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ret void
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}
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define internal void @share(i8* %x) {
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; CHECK-LABEL: define {{[^@]+}}@share
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; CHECK-SAME: (i8* nofree writeonly [[X:%.*]]) #[[ATTR2:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i8* [[X]], i8** @S, align 8
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; CHECK-NEXT: ret void
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;
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entry:
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store i8* %x, i8** @S
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ret void
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}
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define void @unused() {
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; CHECK-LABEL: define {{[^@]+}}@unused() {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = alloca i8, i64 4, align 1
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; CHECK-NEXT: call void @use(i8* noalias readnone undef)
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = call i8* @__kmpc_alloc_shared(i64 4), !dbg !14
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call void @use(i8* %0)
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call void @__kmpc_free_shared(i8* %0)
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ret void
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}
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; CHECK: declare i8* @__kmpc_alloc_shared(i64)
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declare i8* @__kmpc_alloc_shared(i64)
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; CHECK: declare void @__kmpc_free_shared(i8* nocapture)
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declare void @__kmpc_free_shared(i8*)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !6, !7}
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!nvvm.annotations = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "remove_globalization.c", directory: "/tmp/remove_globalization.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 = !{void ()* @kernel, !"kernel", i32 1}
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!6 = !{i32 7, !"openmp", i32 50}
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!7 = !{i32 7, !"openmp-device", i32 50}
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!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !11, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!9 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 1, type: !11, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!10 = distinct !DISubprogram(name: "unused", scope: !1, file: !1, line: 1, type: !11, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!11 = !DISubroutineType(types: !2)
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!12 = !DILocation(line: 2, column: 2, scope: !8)
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!13 = !DILocation(line: 4, column: 2, scope: !9)
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!14 = !DILocation(line: 6, column: 2, scope: !9)
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