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
132 lines
4.7 KiB
LLVM
132 lines
4.7 KiB
LLVM
; RUN: opt -passes=openmp-opt -debug-only=openmp-opt -disable-output < %s 2>&1 | FileCheck %s
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; RUN: opt -passes=openmp-opt -pass-remarks-analysis=openmp-opt -disable-output < %s 2>&1 | FileCheck %s --check-prefix=REMARKS
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; REQUIRES: asserts
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; ModuleID = 'single_threaded_exeuction.c'
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%struct.ident_t = type { i32, i32, i32, i32, ptr }
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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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@0 = private unnamed_addr constant [1 x i8] c"\00", align 1
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@1 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @0 }, align 8
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@kernel_kernel_environment = local_unnamed_addr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 0, i8 0, i8 1 }, ptr @1, ptr null }
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; CHECK-NOT: [openmp-opt] Basic block @kernel entry is executed by a single thread.
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; CHECK: [openmp-opt] Basic block @kernel if.then is executed by a single thread.
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; CHECK-NOT: [openmp-opt] Basic block @kernel if.else is executed by a single thread.
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; CHECK-NOT: [openmp-opt] Basic block @kernel if.end is executed by a single thread.
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define void @kernel() "kernel" {
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%call = call i32 @__kmpc_target_init(ptr @kernel_kernel_environment)
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%cmp = icmp eq i32 %call, -1
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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br label %if.end
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if.else:
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br label %if.end
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if.end:
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call void @__kmpc_target_deinit()
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ret void
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}
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; CHECK: [openmp-opt] Basic block @foo entry is executed by a single thread.
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; Function Attrs: noinline
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define internal void @foo() {
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entry:
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ret void
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}
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; CHECK: [openmp-opt] Basic block @bar.internalized entry is executed by a single thread.
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; Function Attrs: noinline
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define void @bar() {
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entry:
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ret void
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}
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; REMARKS: remark: single_threaded_execution.c:1:0: Could not internalize function. Some optimizations may not be possible.
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; REMARKS-NOT: remark: single_threaded_execution.c:1:0: Could not internalize function. Some optimizations may not be possible.
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; CHECK-NOT: [openmp-opt] Basic block @nvptx entry is executed by a single thread.
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; CHECK-DAG: [openmp-opt] Basic block @nvptx if.then is executed by a single thread.
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; CHECK-NOT: [openmp-opt] Basic block @nvptx if.end is executed by a single thread.
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; Function Attrs: noinline
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define void @nvptx() {
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entry:
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%call = call i32 @llvm.nvvm.read.ptx.sreg.tid.x()
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%cmp = icmp eq i32 %call, 0
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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call void @foo()
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call void @bar()
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call void @baz()
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call void @cold()
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br label %if.end
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if.end:
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ret void
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}
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; CHECK-NOT: [openmp-opt] Basic block @amdgcn entry is executed by a single thread.
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; CHECK-DAG: [openmp-opt] Basic block @amdgcn if.then is executed by a single thread.
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; CHECK-NOT: [openmp-opt] Basic block @amdgcn if.end is executed by a single thread.
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; Function Attrs: noinline
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define void @amdgcn() {
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entry:
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%call = call i32 @llvm.amdgcn.workitem.id.x()
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%cmp = icmp eq i32 %call, 0
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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call void @foo()
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call void @bar()
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call void @baz()
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call void @cold()
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br label %if.end
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if.end:
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ret void
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}
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; CHECK-NOT: [openmp-opt] Basic block @baz entry is executed by a single thread.
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; Function Attrs: noinline
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define weak void @baz() !dbg !8 {
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entry:
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ret void
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}
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; CHECK-NOT: [openmp-opt] Basic block @cold entry is executed by a single thread.
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; Function Attrs: cold convergent noinline nounwind optnone mustprogress
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define weak void @cold() #0 !dbg !9 {
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entry:
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ret void
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}
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declare i32 @llvm.nvvm.read.ptx.sreg.tid.x()
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declare i32 @llvm.amdgcn.workitem.id.x()
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declare void @__kmpc_kernel_prepare_parallel(ptr)
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declare i32 @__kmpc_target_init(ptr)
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declare void @__kmpc_target_deinit()
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attributes #0 = { cold noinline }
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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: "single_threaded_execution.c", directory: "/tmp/single_threaded_execution.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 @kernel, !"kernel", i32 1}
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!8 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 8, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!9 = distinct !DISubprogram(name: "cold", scope: !1, file: !1, line: 8, type: !10, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!10 = !DISubroutineType(types: !2)
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