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clang-p2996/llvm/test/Transforms/OpenMP/spmdization_remarks.ll
Shilei Tian 10068cd654 [OpenMP] Introduce kernel environment 
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
2023-07-26 13:35:14 -04:00

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; RUN: opt -passes=openmp-opt -pass-remarks=openmp-opt -pass-remarks-missed=openmp-opt -pass-remarks-analysis=openmp-opt -disable-output < %s 2>&1 | FileCheck %s
target triple = "nvptx64"
; CHECK: remark: llvm/test/Transforms/OpenMP/spmdization_remarks.c:13:5: Value has potential side effects preventing SPMD-mode execution. Add `__attribute__((assume("ompx_spmd_amenable")))` to the called function to override.
; CHECK: remark: llvm/test/Transforms/OpenMP/spmdization_remarks.c:15:5: Value has potential side effects preventing SPMD-mode execution. Add `__attribute__((assume("ompx_spmd_amenable")))` to the called function to override.
; CHECK: remark: llvm/test/Transforms/OpenMP/spmdization_remarks.c:11:1: Generic-mode kernel is executed with a customized state machine that requires a fallback.
; CHECK: remark: llvm/test/Transforms/OpenMP/spmdization_remarks.c:13:5: Call may contain unknown parallel regions. Use `__attribute__((assume("omp_no_parallelism")))` to override.
; CHECK: remark: llvm/test/Transforms/OpenMP/spmdization_remarks.c:15:5: Call may contain unknown parallel regions. Use `__attribute__((assume("omp_no_parallelism")))` to override.
; CHECK: remark: llvm/test/Transforms/OpenMP/spmdization_remarks.c:20:1: Transformed generic-mode kernel to SPMD-mode.
;; void unknown(void);
;; void known(void) {
;; #pragma omp parallel
;; {
;; unknown();
;; }
;; }
;;
;; void test_fallback(void) {
;; #pragma omp target teams
;; {
;; unknown();
;; known();
;; unknown();
;; }
;; }
;;
;; void no_openmp(void) __attribute__((assume("omp_no_openmp")));
;; void test_no_fallback(void) {
;; #pragma omp target teams
;; {
;; known();
;; known();
;; known();
;; spmd_amenable();
;; }
;; }
%struct.ident_t = type { i32, i32, i32, i32, ptr }
%struct.ConfigurationEnvironmentTy = type { i8, i8, i8 }
%struct.KernelEnvironmentTy = type { %struct.ConfigurationEnvironmentTy, ptr, ptr }
@0 = private unnamed_addr constant [103 x i8] c";llvm/test/Transforms/OpenMP/spmdization_remarks.c;__omp_offloading_2a_d80d3d_test_fallback_l11;11;1;;\00", align 1
@1 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @0 }, align 8
@2 = private unnamed_addr constant [72 x i8] c";llvm/test/Transforms/OpenMP/spmdization_remarks.c;test_fallback;11;1;;\00", align 1
@3 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @2 }, align 8
@4 = private unnamed_addr constant [104 x i8] c";llvm/test/Transforms/OpenMP/spmdization_remarks.c;__omp_offloading_2a_d80d3d_test_fallback_l11;11;25;;\00", align 1
@5 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @4 }, align 8
@6 = private unnamed_addr constant [106 x i8] c";llvm/test/Transforms/OpenMP/spmdization_remarks.c;__omp_offloading_2a_d80d3d_test_no_fallback_l20;20;1;;\00", align 1
@7 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @6 }, align 8
@8 = private unnamed_addr constant [75 x i8] c";llvm/test/Transforms/OpenMP/spmdization_remarks.c;test_no_fallback;20;1;;\00", align 1
@9 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @8 }, align 8
@10 = private unnamed_addr constant [107 x i8] c";llvm/test/Transforms/OpenMP/spmdization_remarks.c;__omp_offloading_2a_d80d3d_test_no_fallback_l20;20;25;;\00", align 1
@11 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, ptr @10 }, align 8
@12 = private unnamed_addr constant [63 x i8] c";llvm/test/Transforms/OpenMP/spmdization_remarks.c;known;4;1;;\00", align 1
@13 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 2, i32 0, ptr @12 }, align 8
@G = external global i32
@__omp_offloading_2a_d80d3d_test_fallback_l11_kernel_environment = local_unnamed_addr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 1, i8 0, i8 1 }, ptr @1, ptr null }
@__omp_offloading_2a_d80d3d_test_no_fallback_l20_kernel_environment = local_unnamed_addr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 1, i8 0, i8 1 }, ptr @1, ptr null }
; Function Attrs: convergent norecurse nounwind
define weak void @__omp_offloading_2a_d80d3d_test_fallback_l11() local_unnamed_addr #0 !dbg !15 {
entry:
%captured_vars_addrs.i.i = alloca [0 x ptr], align 8
%0 = call i32 @__kmpc_target_init(ptr nonnull @__omp_offloading_2a_d80d3d_test_fallback_l11_kernel_environment) #3, !dbg !18
%exec_user_code = icmp eq i32 %0, -1, !dbg !18
br i1 %exec_user_code, label %user_code.entry, label %common.ret, !dbg !18
common.ret: ; preds = %entry, %user_code.entry
ret void, !dbg !19
user_code.entry: ; preds = %entry
%1 = call i32 @__kmpc_global_thread_num(ptr nonnull @3) #3
call void @unknown() #6, !dbg !20
call void @llvm.lifetime.start.p0(i64 0, ptr nonnull %captured_vars_addrs.i.i) #3
%2 = call i32 @__kmpc_global_thread_num(ptr noundef nonnull @13) #3
call void @__kmpc_parallel_51(ptr noundef nonnull @13, i32 %2, i32 noundef 1, i32 noundef -1, i32 noundef -1, ptr noundef @__omp_outlined__2, ptr noundef @__omp_outlined__2_wrapper, ptr noundef nonnull %captured_vars_addrs.i.i, i64 noundef 0) #3, !dbg !23
call void @llvm.lifetime.end.p0(i64 0, ptr nonnull %captured_vars_addrs.i.i) #3, !dbg !26
call void @unknown() #6, !dbg !27
call void @__kmpc_target_deinit() #3, !dbg !28
br label %common.ret
}
define weak i32 @__kmpc_target_init(ptr) {
ret i32 0
}
; Function Attrs: convergent
declare void @unknown() local_unnamed_addr #1
; Function Attrs: nounwind
define hidden void @known() local_unnamed_addr #2 !dbg !29 {
entry:
%captured_vars_addrs = alloca [0 x ptr], align 8
%0 = call i32 @__kmpc_global_thread_num(ptr nonnull @13)
call void @__kmpc_parallel_51(ptr nonnull @13, i32 %0, i32 1, i32 -1, i32 -1, ptr @__omp_outlined__2, ptr @__omp_outlined__2_wrapper, ptr nonnull %captured_vars_addrs, i64 0) #3, !dbg !30
ret void, !dbg !31
}
; Function Attrs: nounwind
declare i32 @__kmpc_global_thread_num(ptr) local_unnamed_addr #3
declare void @__kmpc_target_deinit() local_unnamed_addr
; Function Attrs: norecurse nounwind
define weak void @__omp_offloading_2a_d80d3d_test_no_fallback_l20() local_unnamed_addr #4 !dbg !32 {
entry:
%captured_vars_addrs.i2.i = alloca [0 x ptr], align 8
%0 = call i32 @__kmpc_target_init(ptr nonnull @__omp_offloading_2a_d80d3d_test_no_fallback_l20_kernel_environment) #3, !dbg !33
%exec_user_code = icmp eq i32 %0, -1, !dbg !33
br i1 %exec_user_code, label %user_code.entry, label %common.ret, !dbg !33
common.ret: ; preds = %entry, %user_code.entry
ret void, !dbg !34
user_code.entry: ; preds = %entry
%1 = call i32 @__kmpc_global_thread_num(ptr nonnull @9) #3
call void @llvm.lifetime.start.p0(i64 0, ptr nonnull %captured_vars_addrs.i2.i) #3
%2 = call i32 @__kmpc_global_thread_num(ptr noundef nonnull @13) #3
call void @__kmpc_parallel_51(ptr noundef nonnull @13, i32 %2, i32 noundef 1, i32 noundef -1, i32 noundef -1, ptr noundef @__omp_outlined__2, ptr noundef @__omp_outlined__2_wrapper, ptr noundef nonnull %captured_vars_addrs.i2.i, i64 noundef 0) #3, !dbg !35
call void @llvm.lifetime.end.p0(i64 0, ptr nonnull %captured_vars_addrs.i2.i) #3, !dbg !39
call void @llvm.lifetime.start.p0(i64 0, ptr nonnull %captured_vars_addrs.i2.i) #3
%3 = call i32 @__kmpc_global_thread_num(ptr noundef nonnull @13) #3
call void @__kmpc_parallel_51(ptr noundef nonnull @13, i32 %3, i32 noundef 1, i32 noundef -1, i32 noundef -1, ptr noundef @__omp_outlined__2, ptr noundef @__omp_outlined__2_wrapper, ptr noundef nonnull %captured_vars_addrs.i2.i, i64 noundef 0) #3, !dbg !40
call void @llvm.lifetime.end.p0(i64 0, ptr nonnull %captured_vars_addrs.i2.i) #3, !dbg !42
call void @llvm.lifetime.start.p0(i64 0, ptr nonnull %captured_vars_addrs.i2.i) #3
%4 = call i32 @__kmpc_global_thread_num(ptr noundef nonnull @13) #3
call void @__kmpc_parallel_51(ptr noundef nonnull @13, i32 %4, i32 noundef 1, i32 noundef -1, i32 noundef -1, ptr noundef @__omp_outlined__2, ptr noundef @__omp_outlined__2_wrapper, ptr noundef nonnull %captured_vars_addrs.i2.i, i64 noundef 0) #3, !dbg !43
call void @llvm.lifetime.end.p0(i64 0, ptr nonnull %captured_vars_addrs.i2.i) #3, !dbg !45
call void @spmd_amenable()
call void @__kmpc_target_deinit() #3, !dbg !46
br label %common.ret
}
; Function Attrs: convergent norecurse nounwind
define internal void @__omp_outlined__2(ptr noalias nocapture nofree readnone %.global_tid., ptr noalias nocapture nofree readnone %.bound_tid.) #0 !dbg !47 {
entry:
call void @unknown() #6, !dbg !48
ret void, !dbg !49
}
; Function Attrs: convergent norecurse nounwind
define internal void @__omp_outlined__2_wrapper(i16 zeroext %0, i32 %1) #0 !dbg !50 {
entry:
%global_args = alloca ptr, align 8
call void @__kmpc_get_shared_variables(ptr nonnull %global_args) #3, !dbg !51
call void @unknown() #6, !dbg !52
ret void, !dbg !51
}
declare void @__kmpc_get_shared_variables(ptr) local_unnamed_addr
declare void @__kmpc_parallel_51(ptr, i32, i32, i32, i32, ptr, ptr, ptr, i64) local_unnamed_addr
; Function Attrs: argmemonly nofree nosync nounwind willreturn
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #5
; Function Attrs: argmemonly nofree nosync nounwind willreturn
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #5
declare void @spmd_amenable() #7
attributes #0 = { convergent norecurse nounwind "kernel" "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="sm_53" "target-features"="+ptx32,+sm_53" }
attributes #1 = { convergent "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="sm_53" "target-features"="+ptx32,+sm_53" }
attributes #2 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="sm_53" "target-features"="+ptx32,+sm_53" }
attributes #3 = { nounwind }
attributes #4 = { norecurse nounwind "kernel" "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="sm_53" "target-features"="+ptx32,+sm_53" }
attributes #5 = { argmemonly nofree nosync nounwind willreturn }
attributes #6 = { convergent nounwind }
attributes #7 = { "llvm.assume"="ompx_spmd_amenable" }
!llvm.dbg.cu = !{!0}
!omp_offload.info = !{!3, !4}
!nvvm.annotations = !{!5, !6}
!llvm.module.flags = !{!7, !8, !9, !10, !11, !12, !13}
!llvm.ident = !{!14}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: DebugDirectivesOnly, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "spmdization_remarks.c", directory: "/data/src/llvm-project")
!2 = !{}
!3 = !{i32 0, i32 42, i32 14159165, !"test_no_fallback", i32 20, i32 1}
!4 = !{i32 0, i32 42, i32 14159165, !"test_fallback", i32 11, i32 0}
!5 = !{ptr @__omp_offloading_2a_d80d3d_test_fallback_l11, !"kernel", i32 1}
!6 = !{ptr @__omp_offloading_2a_d80d3d_test_no_fallback_l20, !"kernel", i32 1}
!7 = !{i32 7, !"Dwarf Version", i32 2}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{i32 1, !"wchar_size", i32 4}
!10 = !{i32 7, !"openmp", i32 50}
!11 = !{i32 7, !"openmp-device", i32 50}
!12 = !{i32 7, !"PIC Level", i32 2}
!13 = !{i32 7, !"frame-pointer", i32 2}
!14 = !{!"clang version 13.0.0"}
!15 = distinct !DISubprogram(name: "__omp_offloading_2a_d80d3d_test_fallback_l11", scope: !16, file: !16, line: 11, type: !17, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!16 = !DIFile(filename: "llvm/test/Transforms/OpenMP/spmdization_remarks.c", directory: "/data/src/llvm-project")
!17 = !DISubroutineType(types: !2)
!18 = !DILocation(line: 11, column: 1, scope: !15)
!19 = !DILocation(line: 0, scope: !15)
!20 = !DILocation(line: 13, column: 5, scope: !21, inlinedAt: !22)
!21 = distinct !DISubprogram(name: "__omp_outlined__", scope: !16, file: !16, line: 11, type: !17, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!22 = distinct !DILocation(line: 11, column: 1, scope: !15)
!23 = !DILocation(line: 4, column: 1, scope: !24, inlinedAt: !25)
!24 = distinct !DISubprogram(name: "known", scope: !16, file: !16, line: 3, type: !17, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!25 = distinct !DILocation(line: 14, column: 5, scope: !21, inlinedAt: !22)
!26 = !DILocation(line: 8, column: 1, scope: !24, inlinedAt: !25)
!27 = !DILocation(line: 15, column: 5, scope: !21, inlinedAt: !22)
!28 = !DILocation(line: 11, column: 25, scope: !15)
!29 = distinct !DISubprogram(name: "known", scope: !16, file: !16, line: 3, type: !17, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!30 = !DILocation(line: 4, column: 1, scope: !29)
!31 = !DILocation(line: 8, column: 1, scope: !29)
!32 = distinct !DISubprogram(name: "__omp_offloading_2a_d80d3d_test_no_fallback_l20", scope: !16, file: !16, line: 20, type: !17, scopeLine: 20, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!33 = !DILocation(line: 20, column: 1, scope: !32)
!34 = !DILocation(line: 0, scope: !32)
!35 = !DILocation(line: 4, column: 1, scope: !24, inlinedAt: !36)
!36 = distinct !DILocation(line: 22, column: 5, scope: !37, inlinedAt: !38)
!37 = distinct !DISubprogram(name: "__omp_outlined__1", scope: !16, file: !16, line: 20, type: !17, scopeLine: 20, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!38 = distinct !DILocation(line: 20, column: 1, scope: !32)
!39 = !DILocation(line: 8, column: 1, scope: !24, inlinedAt: !36)
!40 = !DILocation(line: 4, column: 1, scope: !24, inlinedAt: !41)
!41 = distinct !DILocation(line: 23, column: 5, scope: !37, inlinedAt: !38)
!42 = !DILocation(line: 8, column: 1, scope: !24, inlinedAt: !41)
!43 = !DILocation(line: 4, column: 1, scope: !24, inlinedAt: !44)
!44 = distinct !DILocation(line: 24, column: 5, scope: !37, inlinedAt: !38)
!45 = !DILocation(line: 8, column: 1, scope: !24, inlinedAt: !44)
!46 = !DILocation(line: 20, column: 25, scope: !32)
!47 = distinct !DISubprogram(name: "__omp_outlined__2", scope: !16, file: !16, line: 4, type: !17, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!48 = !DILocation(line: 6, column: 5, scope: !47)
!49 = !DILocation(line: 7, column: 3, scope: !47)
!50 = distinct !DISubprogram(linkageName: "__omp_outlined__2_wrapper", scope: !16, file: !16, line: 4, type: !17, scopeLine: 4, flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!51 = !DILocation(line: 4, column: 1, scope: !50)
!52 = !DILocation(line: 6, column: 5, scope: !47, inlinedAt: !53)
!53 = distinct !DILocation(line: 4, column: 1, scope: !50)
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