Move safepoint emission to llvm-final-gc-lowering #47393

vchuravy · 2022-10-30T23:12:28Z

Maybe slightly nicer-form since we now emit them regularly,
and makes them slightly easier to handle for Enzyme.

JeffBezanson · 2022-12-14T20:57:58Z

JIT session error: Symbols not found: [ julia.safepoint ]
JIT session error: Failed to materialize symbols: { (JuliaOJIT, { julia_dllist_7415 }) }
JIT session error: Failed to materialize symbols: { (JuliaOJIT, { julia_dllist_7415 }) }
JIT session error: Failed to materialize symbols: { (JuliaOJIT, { julia_dllist_7415 }) }
JIT session error: Failed to materialize symbols: { (JuliaOJIT, { julia_host_triplet_7284 }) }

JeffBezanson · 2022-12-15T04:02:58Z

OK I think at least this is needed, but it's not sufficient to fix the error:

diff --git a/src/codegen_shared.h b/src/codegen_shared.h
index 0c8e92ca88..fc9cb22735 100644
--- a/src/codegen_shared.h
+++ b/src/codegen_shared.h
@@ -257,9 +257,9 @@ static inline llvm::Value *emit_gc_state_set(llvm::IRBuilder<> &builder, llvm::V
 {
     using namespace llvm;
     Type *T_int8 = state->getType();
-    ptls = emit_bitcast_with_builder(builder, ptls, builder.getInt8PtrTy());
+    llvm::Value *ptls_i8 = emit_bitcast_with_builder(builder, ptls, builder.getInt8PtrTy());
     Constant *offset = ConstantInt::getSigned(builder.getInt32Ty(), offsetof(jl_tls_states_t, gc_state));
-    Value *gc_state = builder.CreateInBoundsGEP(T_int8, ptls, ArrayRef<Value*>(offset), "gc_state");
+    Value *gc_state = builder.CreateInBoundsGEP(T_int8, ptls_i8, ArrayRef<Value*>(offset), "gc_state");
     if (old_state == nullptr) {
         old_state = builder.CreateLoad(T_int8, gc_state);
         cast<LoadInst>(old_state)->setOrdering(AtomicOrdering::Monotonic);
diff --git a/src/llvm-pass-helpers.cpp b/src/llvm-pass-helpers.cpp
index 50ba3652e1..71512df741 100644
--- a/src/llvm-pass-helpers.cpp
+++ b/src/llvm-pass-helpers.cpp
@@ -232,7 +232,7 @@ namespace jl_intrinsics {
             auto intrinsic = Function::Create(
                 FunctionType::get(
                     Type::getVoidTy(context.getLLVMContext()),
-                    {},
+                    {JuliaType::get_ppjlvalue_ty(context.getLLVMContext())},
                     false),
                 Function::ExternalLinkage,
                 SAFEPOINT_NAME);

vchuravy · 2022-12-15T05:56:40Z

The error means we are not running final lowering over a function

gbaraldi · 2022-12-19T18:54:42Z

Could we also not emit this for smallish functions? So something like sin in a hot loop doesn't synchronize every iteration?

On my computer I did some very rough testing and a function call + return takes about 1ns and the safepoint takes about 2ns so it's not nothing.

vchuravy · 2022-12-21T15:27:17Z

Using JULIA_LLVM_ARGS="-debug-only=orc"

Defining MU dllist for JuliaOJIT (tracker: default)  { ("jlcapi_dl_phdr_info_callback_7427", [Callable]), ("jfptr_dllist_7420", [Callable]), ("julia_dllist_7419", [Callable]) }
Looking up { (julia_dllist_7419, RequiredSymbol) } in [ ("JuliaOJIT", MatchExportedSymbolsOnly) ] (required state: Ready)
Dispatching MaterializationUnits...
Done dispatching MaterializationUnits.
Entering OL_applyQueryPhase1:
  Lookup kind: Static
  Search order: [ ("JuliaOJIT", MatchExportedSymbolsOnly) ], Current index = 0 (entering new JITDylib)
  Lookup set: { (julia_dllist_7419, RequiredSymbol) }
  Definition generator candidates: { (julia_dllist_7419, RequiredSymbol) }
  Definition generator non-candidates: { }
Visiting "JuliaOJIT" (MatchExportedSymbolsOnly) with lookup set { (julia_dllist_7419, RequiredSymbol) }:
  First time visiting JuliaOJIT, resetting candidate sets and building generator stack
  Updating candidate set...
    Remaining candidates = { }
  No generators to run for this JITDylib.
All symbols matched.
Phase 1 succeeded.
Entering OL_completeLookup:
  Lookup kind: Static
  Search order: [ ("JuliaOJIT", MatchExportedSymbolsOnly) ], Current index = 1
  Lookup set: { (julia_dllist_7419, RequiredSymbol) }
  Definition generator candidates: { }
  Definition generator non-candidates: { }
Visiting "JuliaOJIT" (MatchExportedSymbolsOnly) with lookup set { (julia_dllist_7419, RequiredSymbol) }:
  Attempting to match "julia_dllist_7419" (RequiredSymbol)... matched, preparing to dispatch MU@0x55f7b3fcdcd0 (dllist)
Stripping unmatched weakly-referenced symbols
Query successfully lodged
Adding MUs to dispatch:
  For JuliaOJIT: Adding 1 MUs.
No dependencies to register
Dispatching MaterializationUnits...
  Dispatching "dllist"
Dispatching: Materialization task: dllist in JuliaOJIT
Emitting, for JuliaOJIT, MU@0x55f7b3fcdcd0 ("dllist", { })
In JuliaOJIT resolving { ("jlcapi_dl_phdr_info_callback_7427": 0x00007f5729e75f00 [Callable]), ("jfptr_dllist_7420": 0x00007f5729e75ee0 [Callable]), ("julia_dllist_7419": 0x00007f5729e75cd0 [Callable]) }
Looking up { (__stack_chk_fail, RequiredSymbol), (__stack_chk_guard, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol), (ijl_apply_generic, RequiredSymbol), (ijl_bounds_error_ints, RequiredSymbol), (ijl_box_uint64, RequiredSymbol), (ijl_gc_pool_alloc, RequiredSymbol), (ijl_throw, RequiredSymbol), (ijl_type_error, RequiredSymbol), (jl_undefref_exception, RequiredSymbol), (jl_world_counter, RequiredSymbol), (jlplt_dl_iterate_phdr_7429_got, RequiredSymbol), (jlplt_ijl_alloc_array_1d_7079_got, RequiredSymbol), (jlplt_ijl_array_del_beg_7431_got, RequiredSymbol), (jlsys_ArgumentError_77, RequiredSymbol), (jlsys_dl_phdr_info_callback_236, RequiredSymbol), (julia.safepoint, RequiredSymbol), (julia_filter!_7433, RequiredSymbol) } in [ ("JuliaOJIT", MatchAllSymbols), ("JuliaGlobals", MatchExportedSymbolsOnly) ] (required state: Resolved)
Dispatching MaterializationUnits...
Done dispatching MaterializationUnits.
Entering OL_applyQueryPhase1:
  Lookup kind: Static
  Search order: [ ("JuliaOJIT", MatchAllSymbols), ("JuliaGlobals", MatchExportedSymbolsOnly) ], Current index = 0 (entering new JITDylib)
  Lookup set: { (__stack_chk_fail, RequiredSymbol), (__stack_chk_guard, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol), (ijl_apply_generic, RequiredSymbol), (ijl_bounds_error_ints, RequiredSymbol), (ijl_box_uint64, RequiredSymbol), (ijl_gc_pool_alloc, RequiredSymbol), (ijl_throw, RequiredSymbol), (ijl_type_error, RequiredSymbol), (jl_undefref_exception, RequiredSymbol), (jl_world_counter, RequiredSymbol), (jlplt_dl_iterate_phdr_7429_got, RequiredSymbol), (jlplt_ijl_alloc_array_1d_7079_got, RequiredSymbol), (jlplt_ijl_array_del_beg_7431_got, RequiredSymbol), (jlsys_ArgumentError_77, RequiredSymbol), (jlsys_dl_phdr_info_callback_236, RequiredSymbol), (julia.safepoint, RequiredSymbol), (julia_filter!_7433, RequiredSymbol) }
  Definition generator candidates: { (__stack_chk_fail, RequiredSymbol), (__stack_chk_guard, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol), (ijl_apply_generic, RequiredSymbol), (ijl_bounds_error_ints, RequiredSymbol), (ijl_box_uint64, RequiredSymbol), (ijl_gc_pool_alloc, RequiredSymbol), (ijl_throw, RequiredSymbol), (ijl_type_error, RequiredSymbol), (jl_undefref_exception, RequiredSymbol), (jl_world_counter, RequiredSymbol), (jlplt_dl_iterate_phdr_7429_got, RequiredSymbol), (jlplt_ijl_alloc_array_1d_7079_got, RequiredSymbol), (jlplt_ijl_array_del_beg_7431_got, RequiredSymbol), (jlsys_ArgumentError_77, RequiredSymbol), (jlsys_dl_phdr_info_callback_236, RequiredSymbol), (julia.safepoint, RequiredSymbol), (julia_filter!_7433, RequiredSymbol) }
  Definition generator non-candidates: { }
Visiting "JuliaOJIT" (MatchAllSymbols) with lookup set { (__stack_chk_fail, RequiredSymbol), (__stack_chk_guard, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol), (ijl_apply_generic, RequiredSymbol), (ijl_bounds_error_ints, RequiredSymbol), (ijl_box_uint64, RequiredSymbol), (ijl_gc_pool_alloc, RequiredSymbol), (ijl_throw, RequiredSymbol), (ijl_type_error, RequiredSymbol), (jl_undefref_exception, RequiredSymbol), (jl_world_counter, RequiredSymbol), (jlplt_dl_iterate_phdr_7429_got, RequiredSymbol), (jlplt_ijl_alloc_array_1d_7079_got, RequiredSymbol), (jlplt_ijl_array_del_beg_7431_got, RequiredSymbol), (jlsys_ArgumentError_77, RequiredSymbol), (jlsys_dl_phdr_info_callback_236, RequiredSymbol), (julia.safepoint, RequiredSymbol), (julia_filter!_7433, RequiredSymbol) }:
  First time visiting JuliaOJIT, resetting candidate sets and building generator stack
  Updating candidate set...
    Remaining candidates = { (julia.safepoint, RequiredSymbol), (jl_undefref_exception, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol), (ijl_gc_pool_alloc, RequiredSymbol) }
  No generators to run for this JITDylib.
Phase 1 moving to next JITDylib.
Visiting "JuliaGlobals" (MatchExportedSymbolsOnly) with lookup set { (__stack_chk_fail, RequiredSymbol), (__stack_chk_guard, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol), (ijl_apply_generic, RequiredSymbol), (ijl_bounds_error_ints, RequiredSymbol), (ijl_box_uint64, RequiredSymbol), (ijl_gc_pool_alloc, RequiredSymbol), (ijl_throw, RequiredSymbol), (ijl_type_error, RequiredSymbol), (jl_undefref_exception, RequiredSymbol), (jl_world_counter, RequiredSymbol), (jlplt_dl_iterate_phdr_7429_got, RequiredSymbol), (jlplt_ijl_alloc_array_1d_7079_got, RequiredSymbol), (jlplt_ijl_array_del_beg_7431_got, RequiredSymbol), (jlsys_ArgumentError_77, RequiredSymbol), (jlsys_dl_phdr_info_callback_236, RequiredSymbol), (julia.safepoint, RequiredSymbol), (julia_filter!_7433, RequiredSymbol) }:
  First time visiting JuliaGlobals, resetting candidate sets and building generator stack
  Updating candidate set...
    Remaining candidates = { (julia.safepoint, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol) }
  Running 2 remaining generators for 2 candidates
  Attempting to generate { (julia.safepoint, RequiredSymbol), (ijl_adopt_thread, RequiredSymbol) }
Defining MU <Absolute Symbols> for JuliaGlobals (tracker: 0x0, default will be used)
  { ("ijl_adopt_thread", [Data]) }
  Updating candidate set post-generation
  Attempting to generate { (julia.safepoint, RequiredSymbol) }
  Updating candidate set post-generation
Phase 1 moving to next JITDylib.
Phase 1 failed with unresolved symbols.
JIT session error: Symbols not found: [ julia.safepoint ]
In JuliaOJIT failing materialization for { ("jlcapi_dl_phdr_info_callback_7427", [Callable]), ("jfptr_dllist_7420", [Callable]), ("julia_dllist_7419", [Callable]) }

Looks like this is our first @cfunction? But looking at the last calls to FinalLowerGC::runFunction

(rr) p F.getParent()->dump()
; ModuleID = 'dllist'
source_filename = "dllist"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@"+Core.Array48" = private unnamed_addr constant {}* inttoptr (i64 140083731563600 to {}*), !julia.constgv !0
@jlplt_ijl_alloc_array_1d_7079_got = external global void ()*
@jl_world_counter = external global i64
@"jl_global#541" = private unnamed_addr constant {}* inttoptr (i64 140083567395392 to {}*), !julia.constgv !0
@"jl_global#542" = private unnamed_addr constant {}* inttoptr (i64 140083758686808 to {}*), !julia.constgv !0
@"+Main.Base.Libc.Libdl.dl_phdr_info543" = private unnamed_addr constant {}* inttoptr (i64 140083741189072 to {}*), !julia.constgv !0
@"+Core.Int32416" = private unnamed_addr constant {}* inttoptr (i64 140083660482112 to {}*), !julia.constgv !0
@_j_str50 = private unnamed_addr constant [10 x i8] c"cfunction\00"
@"*Core.Intrinsics.bitcast32" = private unnamed_addr constant {}* inttoptr (i64 140083661392080 to {}*), !julia.constgv !0
@jlplt_dl_iterate_phdr_7429_got = external global void ()*
@"*Core.Intrinsics.arraylen30" = private unnamed_addr constant {}* inttoptr (i64 140083661388624 to {}*), !julia.constgv !0
@"*Core.===37" = private unnamed_addr constant {}* inttoptr (i64 140083660467216 to {}*), !julia.constgv !0
@"*Core.ArgumentError17" = private unnamed_addr constant {}* inttoptr (i64 140083660457296 to {}*), !julia.constgv !0
@"jl_global#544" = private unnamed_addr constant {}* inttoptr (i64 140083733353768 to {}*), !julia.constgv !0
@"*Core.throw19" = private unnamed_addr constant {}* inttoptr (i64 140083660472720 to {}*), !julia.constgv !0
@"+Core.ArgumentError18" = private unnamed_addr constant {}* inttoptr (i64 140083661191360 to {}*), !julia.constgv !0
@"*Core.arrayref50" = private unnamed_addr constant {}* inttoptr (i64 140083660466640 to {}*), !julia.constgv !0
@jl_undefref_exception = external constant {}*
@jlplt_ijl_array_del_beg_7431_got = external global void ()*
@"*Main.Base.filter!545" = private unnamed_addr constant {}* inttoptr (i64 140083720891344 to {}*), !julia.constgv !0
@llvm.compiler.used = appending global [4 x i8*] [i8* bitcast (void ({} addrspace(10)*)* @ijl_gc_queue_root to i8*), i8* bitcast (void ({} addrspace(10)*)* @jl_gc_queue_binding to i8*), i8* bitcast ({} addrspace(10)* (i8*, i32, i32)* @ijl_gc_pool_alloc to i8*), i8* bitcast ({} addrspace(10)* (i8*, i64)* @ijl_gc_big_alloc to i8*)], section "llvm.metadata"

; Function Attrs: sspstrong
define nonnull {} addrspace(10)* @julia_dllist_7419() #0 !dbg !6 {
top:
  %gcframe = alloca {} addrspace(10)*, i32 3, align 16
  %0 = bitcast {} addrspace(10)** %gcframe to i8*
  call void @llvm.memset.p0i8.i32(i8* align 16 %0, i8 0, i32 24, i1 false), !tbaa !8
  %1 = call {}*** @julia.get_pgcstack()
  %2 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %gcframe, i32 0
  %3 = bitcast {} addrspace(10)** %2 to i64*
  store i64 4, i64* %3, align 8, !tbaa !8
  %4 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %gcframe, i32 1
  %5 = bitcast {} addrspace(10)** %4 to {}***
  %6 = load {}**, {}*** %1, align 8
  store {}** %6, {}*** %5, align 8, !tbaa !8
  %7 = bitcast {}*** %1 to {} addrspace(10)***
  store {} addrspace(10)** %gcframe, {} addrspace(10)*** %7, align 8
  %8 = bitcast {}*** %1 to {}**
  %current_task = getelementptr inbounds {}*, {}** %8, i64 -13
  %9 = bitcast {}** %current_task to i64*
  %world_age = getelementptr inbounds i64, i64* %9, i64 14
  %10 = bitcast {}*** %1 to {}**
  %current_task1 = getelementptr inbounds {}*, {}** %10, i64 -13
  %ptls_field = getelementptr inbounds {}*, {}** %current_task1, i64 15
  %ptls_load = load {}*, {}** %ptls_field, align 8, !tbaa !8
  %ptls = bitcast {}* %ptls_load to {}**
  fence syncscope("singlethread") seq_cst
  %11 = bitcast {}** %ptls to i64**, !dbg !12
  %12 = getelementptr inbounds i64*, i64** %11, i64 2, !dbg !12
  %safepoint = load i64*, i64** %12, align 8, !dbg !12
  %13 = load volatile i64, i64* %safepoint, align 8, !dbg !12
  fence syncscope("singlethread") seq_cst
  %14 = load {}*, {}** @"+Core.Array48", align 8, !dbg !13, !tbaa !18, !nonnull !0, !dereferenceable !20, !align !21
  %15 = addrspacecast {}* %14 to {} addrspace(10)*, !dbg !13
  %16 = load atomic void ()*, void ()** @jlplt_ijl_alloc_array_1d_7079_got unordered, align 8, !dbg !13
  %17 = bitcast void ()* %16 to {} addrspace(10)* ({} addrspace(10)*, i64)*, !dbg !13
  %18 = call nonnull {} addrspace(10)* %17({} addrspace(10)* %15, i64 0), !dbg !13
  %19 = addrspacecast {} addrspace(10)* %18 to {} addrspace(11)*, !dbg !22
  %20 = addrspacecast {} addrspace(11)* %19 to {}*
  %21 = load {}*, {}** @"*Core.Intrinsics.bitcast32", align 8, !dbg !32, !tbaa !18
  %22 = bitcast {}* %21 to {} addrspace(10)**, !dbg !32
  %23 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %22, i64 1, !dbg !32
  %24 = ptrtoint {}* %20 to i64, !dbg !32
  %25 = bitcast {}* %20 to i8*, !dbg !31
  %26 = load atomic void ()*, void ()** @jlplt_dl_iterate_phdr_7429_got unordered, align 8, !dbg !31
  %27 = bitcast void ()* %26 to i32 (i64, i8*)*, !dbg !31
  %28 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %gcframe, i32 2
  store {} addrspace(10)* %18, {} addrspace(10)** %28, align 8
  %29 = call i32 %27(i64 ptrtoint (i32 (i8*, i64, i8*)* @jlcapi_dl_phdr_info_callback_7427 to i64), i8* %25), !dbg !31
  %30 = load {}*, {}** @"*Core.Intrinsics.arraylen30", align 8, !dbg !35, !tbaa !18
  %31 = bitcast {}* %30 to {} addrspace(10)**, !dbg !35
  %32 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %31, i64 1, !dbg !35
  %33 = addrspacecast {} addrspace(10)* %18 to {} addrspace(11)*, !dbg !35
  %34 = bitcast {} addrspace(11)* %33 to { i8 addrspace(13)*, i64, i16, i16, i32 } addrspace(11)*, !dbg !35
  %35 = getelementptr inbounds { i8 addrspace(13)*, i64, i16, i16, i32 }, { i8 addrspace(13)*, i64, i16, i16, i32 } addrspace(11)* %34, i32 0, i32 1, !dbg !35
  %36 = load i64, i64 addrspace(11)* %35, align 8, !dbg !35, !tbaa !45, !range !48
  %37 = load {}*, {}** @"*Core.===37", align 8, !dbg !49, !tbaa !18
  %38 = bitcast {}* %37 to {} addrspace(10)**, !dbg !49
  %39 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %38, i64 1, !dbg !49
  %40 = icmp eq i64 %36, 0, !dbg !49
  %41 = zext i1 %40 to i8, !dbg !49
  %42 = trunc i8 %41 to i1, !dbg !41
  %43 = xor i1 %42, true, !dbg !41
  br i1 %43, label %L12, label %L9, !dbg !41

L9:                                               ; preds = %top
  %44 = load {}*, {}** @"*Core.ArgumentError17", align 8, !dbg !52, !tbaa !18
  %45 = bitcast {}* %44 to {} addrspace(10)**, !dbg !52
  %46 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %45, i64 1, !dbg !52
  %47 = load {}*, {}** @"jl_global#544", align 8, !dbg !52, !tbaa !18, !nonnull !0
  %48 = addrspacecast {}* %47 to {} addrspace(10)*, !dbg !52
  %49 = call [1 x {} addrspace(10)*] @jlsys_ArgumentError_77({} addrspace(10)* %48) #1, !dbg !52
  %50 = load {}*, {}** @"*Core.throw19", align 8, !dbg !52, !tbaa !18
  %51 = bitcast {}* %50 to {} addrspace(10)**, !dbg !52
  %52 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %51, i64 1, !dbg !52
  %53 = load {}*, {}** @"+Core.ArgumentError18", align 8, !dbg !52, !tbaa !18, !nonnull !0, !dereferenceable !20, !align !21
  %54 = bitcast {}*** %1 to {}**, !dbg !52
  %current_task2 = getelementptr inbounds {}*, {}** %54, i64 -13, !dbg !52
  %55 = addrspacecast {}* %53 to {} addrspace(10)*, !dbg !52
  %56 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %gcframe, i32 2
  %57 = extractvalue [1 x {} addrspace(10)*] %49, 0
  store {} addrspace(10)* %57, {} addrspace(10)** %56, align 8
  %ptls_field4 = getelementptr inbounds {}*, {}** %current_task2, i64 15, !dbg !52
  %ptls_load5 = load {}*, {}** %ptls_field4, align 8, !dbg !52, !tbaa !8
  %ptls6 = bitcast {}* %ptls_load5 to {}**, !dbg !52
  %58 = bitcast {}** %ptls6 to i8*, !dbg !52
  %59 = call noalias nonnull {} addrspace(10)* @ijl_gc_pool_alloc(i8* %58, i32 1392, i32 16) #3, !dbg !52
  %60 = bitcast {} addrspace(10)* %59 to {}* addrspace(10)*, !dbg !52
  %61 = getelementptr inbounds {}*, {}* addrspace(10)* %60, i64 -1, !dbg !52
  store atomic {}* %53, {}* addrspace(10)* %61 unordered, align 8, !dbg !52, !tbaa !53
  %62 = bitcast {} addrspace(10)* %59 to [1 x {} addrspace(10)*] addrspace(10)*, !dbg !52
  store [1 x {} addrspace(10)*] %49, [1 x {} addrspace(10)*] addrspace(10)* %62, align 8, !dbg !52, !tbaa !56
  %63 = addrspacecast {} addrspace(10)* %59 to {} addrspace(12)*, !dbg !52
  call void @ijl_throw({} addrspace(12)* %63), !dbg !52
  unreachable, !dbg !52

L12:                                              ; preds = %top
  %64 = load {}*, {}** @"*Core.arrayref50", align 8, !dbg !59, !tbaa !18
  %65 = bitcast {}* %64 to {} addrspace(10)**, !dbg !59
  %66 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %65, i64 1, !dbg !59
  %67 = addrspacecast {} addrspace(10)* %18 to {} addrspace(11)*, !dbg !59
  %68 = bitcast {} addrspace(11)* %67 to { i8 addrspace(13)*, i64, i16, i16, i32 } addrspace(11)*, !dbg !59
  %69 = getelementptr inbounds { i8 addrspace(13)*, i64, i16, i16, i32 }, { i8 addrspace(13)*, i64, i16, i16, i32 } addrspace(11)* %68, i32 0, i32 1, !dbg !59
  %70 = load i64, i64 addrspace(11)* %69, align 8, !dbg !59, !tbaa !45, !range !48
  %71 = icmp ult i64 0, %70, !dbg !59
  br i1 %71, label %idxend, label %oob, !dbg !59

oob:                                              ; preds = %L12
  %72 = alloca i64, i64 1, align 8, !dbg !59
  %73 = getelementptr inbounds i64, i64* %72, i64 0, !dbg !59
  store i64 1, i64* %73, align 8, !dbg !59
  %74 = addrspacecast {} addrspace(10)* %18 to {} addrspace(12)*, !dbg !59
  call void @ijl_bounds_error_ints({} addrspace(12)* %74, i64* %72, i64 1), !dbg !59
  unreachable, !dbg !59

idxend:                                           ; preds = %L12
  %75 = addrspacecast {} addrspace(10)* %18 to {} addrspace(11)*, !dbg !59
  %76 = bitcast {} addrspace(11)* %75 to { i8 addrspace(13)*, i64, i16, i16, i32 } addrspace(11)*, !dbg !59
  %77 = getelementptr inbounds { i8 addrspace(13)*, i64, i16, i16, i32 }, { i8 addrspace(13)*, i64, i16, i16, i32 } addrspace(11)* %76, i32 0, i32 0, !dbg !59
  %78 = load i8 addrspace(13)*, i8 addrspace(13)* addrspace(11)* %77, align 8, !dbg !59, !tbaa !62, !nonnull !0
  %79 = bitcast i8 addrspace(13)* %78 to {} addrspace(10)* addrspace(13)*, !dbg !59
  %80 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)* addrspace(13)* %79, i64 0, !dbg !59
  %81 = load {} addrspace(10)*, {} addrspace(10)* addrspace(13)* %80, align 8, !dbg !59, !tbaa !64
  %82 = load {}*, {}** @jl_undefref_exception, align 8, !dbg !59, !tbaa !18, !nonnull !0
  %83 = icmp ne {} addrspace(10)* %81, null, !dbg !59
  br i1 %83, label %pass, label %fail, !dbg !59

fail:                                             ; preds = %idxend
  %84 = addrspacecast {}* %82 to {} addrspace(12)*, !dbg !59
  call void @ijl_throw({} addrspace(12)* %84), !dbg !59
  unreachable, !dbg !59

pass:                                             ; preds = %idxend
  %85 = load atomic void ()*, void ()** @jlplt_ijl_array_del_beg_7431_got unordered, align 8, !dbg !66
  %86 = bitcast void ()* %85 to void ({} addrspace(10)*, i64)*, !dbg !66
  call void %86({} addrspace(10)* %18, i64 1), !dbg !66
  %87 = load {}*, {}** @"*Main.Base.filter!545", align 8, !dbg !69, !tbaa !18
  %88 = bitcast {}* %87 to {} addrspace(10)**, !dbg !69
  %89 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %88, i64 1, !dbg !69
  %90 = call nonnull {} addrspace(10)* @"julia_filter!_7433"({} addrspace(10)* %18) #1, !dbg !69
  %91 = getelementptr inbounds {} addrspace(10)*, {} addrspace(10)** %gcframe, i32 1
  %92 = load {} addrspace(10)*, {} addrspace(10)** %91, align 8, !tbaa !8
  %93 = bitcast {}*** %1 to {} addrspace(10)**
  store {} addrspace(10)* %92, {} addrspace(10)** %93, align 8, !tbaa !8
  ret {} addrspace(10)* %18, !dbg !70
}

define nonnull {} addrspace(10)* @jfptr_dllist_7420({} addrspace(10)* %0, {} addrspace(10)** noalias nocapture noundef readonly %1, i32 %2) #1 {
top:
  %3 = call {}*** @julia.get_pgcstack()
  %4 = call nonnull {} addrspace(10)* @julia_dllist_7419() #1
  ret {} addrspace(10)* %4
}

declare {}*** @julia.get_pgcstack()

; Function Attrs: inaccessiblemem_or_argmemonly
declare void @julia.safepoint({}** %0) #2

define i32 @jlcapi_dl_phdr_info_callback_7427(i8* %0, i64 %1, i8* %2) #1 {
top:
  %gcframe = call {} addrspace(10)** @julia.new_gc_frame(i32 1)
  %3 = alloca { i32, i64, i64, i16 }, align 8
  %4 = call {}*** @julia.get_pgcstack_or_new()
  call void @julia.push_gc_frame({} addrspace(10)** %gcframe, i32 1)
  %5 = bitcast {}*** %4 to {}**
  %current_task = getelementptr inbounds {}*, {}** %5, i64 -13
  %6 = bitcast {}** %current_task to i64*
  %world_age = getelementptr inbounds i64, i64* %6, i64 14
  %7 = load i64, i64* %world_age, align 8, !tbaa !8
  %8 = load atomic i64, i64* @jl_world_counter acquire, align 8
  %9 = load {}*, {}** @"jl_global#541", align 8, !tbaa !18, !nonnull !0, !dereferenceable !71, !align !72
  %10 = bitcast {}* %9 to i64*
  %11 = getelementptr inbounds i64, i64* %10, i32 3
  %12 = load i64, i64* %11, align 8
  %13 = icmp uge i64 %12, %8
  store i64 %8, i64* %world_age, align 8
  %14 = bitcast i8* %0 to { i32, i64, i64, i16 }*
  %15 = bitcast { i32, i64, i64, i16 }* %3 to i8*
  %16 = bitcast { i32, i64, i64, i16 }* %14 to i8*
  call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %15, i8* align 1 %16, i64 32, i1 false)
  %17 = bitcast i8* %2 to {}*
  %18 = addrspacecast {}* %17 to {} addrspace(10)*
  %19 = addrspacecast { i32, i64, i64, i16 }* %3 to { i32, i64, i64, i16 } addrspace(11)*
  %20 = select i1 %13, i32 ({ i32, i64, i64, i16 } addrspace(11)*, i64, {} addrspace(10)*)* @jlsys_dl_phdr_info_callback_236, i32 ({ i32, i64, i64, i16 } addrspace(11)*, i64, {} addrspace(10)*)* @jlcapi_dl_phdr_info_callback_7427_gfthunk
  %21 = call {} addrspace(10)** @julia.get_gc_frame_slot({} addrspace(10)** %gcframe, i32 0)
  store {} addrspace(10)* %18, {} addrspace(10)** %21, align 8
  %22 = call i32 %20({ i32, i64, i64, i16 } addrspace(11)* nocapture readonly %19, i64 zeroext %1, {} addrspace(10)* %18) #1
  store i64 %7, i64* %world_age, align 8
  call void @julia.pop_gc_frame({} addrspace(10)** %gcframe)
  ret i32 %22
}

declare {}*** @julia.get_pgcstack_or_new()

declare i32 @jlsys_dl_phdr_info_callback_236({ i32, i64, i64, i16 } addrspace(11)* nocapture readonly %0, i64 zeroext %1, {} addrspace(10)* %2) #1

define internal i32 @jlcapi_dl_phdr_info_callback_7427_gfthunk({ i32, i64, i64, i16 } addrspace(11)* nocapture readonly %0, i64 zeroext %1, {} addrspace(10)* %2) #1 {
top:
  %3 = call {}*** @julia.get_pgcstack()
  %4 = load {}*, {}** @"jl_global#542", align 8, !tbaa !73, !invariant.load !0, !nonnull !0
  %5 = addrspacecast {}* %4 to {} addrspace(10)*
  %6 = load {}*, {}** @"+Main.Base.Libc.Libdl.dl_phdr_info543", align 8, !tbaa !73, !invariant.load !0, !nonnull !0, !dereferenceable !20, !align !21
  %7 = bitcast {}*** %3 to {}**
  %current_task = getelementptr inbounds {}*, {}** %7, i64 -13
  %8 = addrspacecast {}* %6 to {} addrspace(10)*
  %9 = call noalias nonnull {} addrspace(10)* @julia.gc_alloc_obj({}** %current_task, i64 32, {} addrspace(10)* %8) #3
  %10 = bitcast {} addrspace(10)* %9 to i8 addrspace(10)*
  %11 = bitcast { i32, i64, i64, i16 } addrspace(11)* %0 to i8 addrspace(11)*
  call void @llvm.memcpy.p10i8.p11i8.i64(i8 addrspace(10)* align 8 %10, i8 addrspace(11)* %11, i64 32, i1 false), !tbaa !74
  %12 = call nonnull {} addrspace(10)* @ijl_box_uint64(i64 zeroext %1)
  %13 = call nonnull {} addrspace(10)* ({} addrspace(10)* ({} addrspace(10)*, {} addrspace(10)**, i32)*, {} addrspace(10)*, ...) @julia.call({} addrspace(10)* ({} addrspace(10)*, {} addrspace(10)**, i32)* @ijl_apply_generic, {} addrspace(10)* %5, {} addrspace(10)* %9, {} addrspace(10)* %12, {} addrspace(10)* %2)
  %14 = load {}*, {}** @"+Core.Int32416", align 8, !tbaa !73, !invariant.load !0, !nonnull !0, !dereferenceable !20, !align !21
  %15 = addrspacecast {}* %14 to {} addrspace(10)*
  %16 = call {} addrspace(10)* @julia.typeof({} addrspace(10)* %13)
  %17 = icmp eq {} addrspace(10)* %16, %15
  br i1 %17, label %pass, label %fail

fail:                                             ; preds = %top
  %18 = load {}*, {}** @"+Core.Int32416", align 8, !tbaa !73, !invariant.load !0, !nonnull !0, !dereferenceable !20, !align !21
  %19 = addrspacecast {}* %18 to {} addrspace(10)*
  %20 = addrspacecast {} addrspace(10)* %13 to {} addrspace(12)*
  call void @ijl_type_error(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @_j_str50, i32 0, i32 0), {} addrspace(10)* %19, {} addrspace(12)* %20)
  unreachable

pass:                                             ; preds = %top
  %21 = bitcast {} addrspace(10)* %13 to i32 addrspace(10)*
  %22 = load i32, i32 addrspace(10)* %21, align 4
  ret i32 %22
}

declare nonnull {} addrspace(10)* @ijl_apply_generic({} addrspace(10)* %0, {} addrspace(10)** noalias nocapture noundef readonly %1, i32 %2)

declare nonnull {} addrspace(10)* @julia.call({} addrspace(10)* ({} addrspace(10)*, {} addrspace(10)**, i32)* %0, {} addrspace(10)* %1, ...)

; Function Attrs: allocsize(1)
declare noalias nonnull {} addrspace(10)* @julia.gc_alloc_obj({}** %0, i64 %1, {} addrspace(10)* %2) #3

; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p10i8.p11i8.i64(i8 addrspace(10)* noalias nocapture writeonly %0, i8 addrspace(11)* noalias nocapture readonly %1, i64 %2, i1 immarg %3) #4

declare nonnull {} addrspace(10)* @ijl_box_uint64(i64 zeroext %0)

; Function Attrs: norecurse nounwind readnone
declare nonnull {} addrspace(10)* @julia.typeof({} addrspace(10)* %0) #5

; Function Attrs: noreturn
declare void @ijl_type_error(i8* %0, {} addrspace(10)* %1, {} addrspace(12)* %2) #6

; Function Attrs: nounwind readnone
declare nonnull {}* @julia.pointer_from_objref({} addrspace(11)* %0) #7

declare [1 x {} addrspace(10)*] @jlsys_ArgumentError_77({} addrspace(10)* %0) #1

; Function Attrs: noreturn
declare void @ijl_throw({} addrspace(12)* %0) #6

; Function Attrs: cold noreturn nounwind
declare void @llvm.trap() #8

; Function Attrs: noreturn
declare void @ijl_bounds_error_ints({} addrspace(12)* %0, i64* %1, i64 %2) #6

declare nonnull {} addrspace(10)* @"julia_filter!_7433"({} addrspace(10)* %0) #1

; Function Attrs: inaccessiblemem_or_argmemonly
declare void @ijl_gc_queue_root({} addrspace(10)* %0) #2

; Function Attrs: inaccessiblemem_or_argmemonly
declare void @jl_gc_queue_binding({} addrspace(10)* %0) #2

; Function Attrs: allocsize(1)
declare noalias nonnull {} addrspace(10)* @ijl_gc_pool_alloc(i8* %0, i32 %1, i32 %2) #3

; Function Attrs: allocsize(1)
declare noalias nonnull {} addrspace(10)* @ijl_gc_big_alloc(i8* %0, i64 %1) #3

; Function Attrs: argmemonly nofree nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly %0, i8* noalias nocapture readonly %1, i64 %2, i1 immarg %3) #4

declare noalias nonnull {} addrspace(10)** @julia.new_gc_frame(i32 %0)

declare void @julia.push_gc_frame({} addrspace(10)** %0, i32 %1)

declare {} addrspace(10)** @julia.get_gc_frame_slot({} addrspace(10)** %0, i32 %1)

declare void @julia.pop_gc_frame({} addrspace(10)** %0)

; Function Attrs: allocsize(1)
declare noalias nonnull {} addrspace(10)* @julia.gc_alloc_bytes(i8* %0, i64 %1) #3

; Function Attrs: argmemonly nofree nounwind willreturn writeonly
declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly %0, i8 %1, i32 %2, i1 immarg %3) #9

attributes #0 = { sspstrong "probe-stack"="inline-asm" }
attributes #1 = { "probe-stack"="inline-asm" }
attributes #2 = { inaccessiblemem_or_argmemonly }
attributes #3 = { allocsize(1) }
attributes #4 = { argmemonly nofree nounwind willreturn }
attributes #5 = { norecurse nounwind readnone }
attributes #6 = { noreturn }
attributes #7 = { nounwind readnone }
attributes #8 = { cold noreturn nounwind }
attributes #9 = { argmemonly nofree nounwind willreturn writeonly }

!llvm.module.flags = !{!1, !2, !3}
!llvm.dbg.cu = !{!4}

!0 = !{}
!1 = !{i32 2, !"Dwarf Version", i32 4}
!2 = !{i32 2, !"Debug Info Version", i32 3}
!3 = !{i32 1, !"stack-protector-guard", !"global"}
!4 = distinct !DICompileUnit(language: DW_LANG_Julia, file: !5, producer: "julia", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, nameTableKind: GNU)
!5 = !DIFile(filename: "libdl.jl", directory: ".")
!6 = distinct !DISubprogram(name: "dllist", linkageName: "julia_dllist_7419", scope: null, file: !5, line: 291, type: !7, scopeLine: 291, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!7 = !DISubroutineType(types: !0)
!8 = !{!9, !9, i64 0}
!9 = !{!"jtbaa_gcframe", !10, i64 0}
!10 = !{!"jtbaa", !11, i64 0}
!11 = !{!"jtbaa"}
!12 = !DILocation(line: 291, scope: !6)
!13 = !DILocation(line: 477, scope: !14, inlinedAt: !16)
!14 = distinct !DISubprogram(name: "Array;", linkageName: "Array", scope: !15, file: !15, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!15 = !DIFile(filename: "boot.jl", directory: ".")
!16 = !DILocation(line: 496, scope: !14, inlinedAt: !17)
!17 = !DILocation(line: 292, scope: !6)
!18 = !{!19, !19, i64 0}
!19 = !{!"jtbaa_const", !10, i64 0}
!20 = !{i64 56}
!21 = !{i64 16}
!22 = !DILocation(line: 155, scope: !23, inlinedAt: !25)
!23 = distinct !DISubprogram(name: "pointer_from_objref;", linkageName: "pointer_from_objref", scope: !24, file: !24, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!24 = !DIFile(filename: "pointer.jl", directory: ".")
!25 = !DILocation(line: 42, scope: !26, inlinedAt: !28)
!26 = distinct !DISubprogram(name: "unsafe_convert;", linkageName: "unsafe_convert", scope: !27, file: !27, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!27 = !DIFile(filename: "refvalue.jl", directory: ".")
!28 = !DILocation(line: 101, scope: !29, inlinedAt: !31)
!29 = distinct !DISubprogram(name: "unsafe_convert;", linkageName: "unsafe_convert", scope: !30, file: !30, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!30 = !DIFile(filename: "refpointer.jl", directory: ".")
!31 = !DILocation(line: 305, scope: !6)
!32 = !DILocation(line: 30, scope: !33, inlinedAt: !34)
!33 = distinct !DISubprogram(name: "convert;", linkageName: "convert", scope: !24, file: !24, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!34 = !DILocation(line: 50, scope: !26, inlinedAt: !28)
!35 = !DILocation(line: 10, scope: !36, inlinedAt: !38)
!36 = distinct !DISubprogram(name: "length;", linkageName: "length", scope: !37, file: !37, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!37 = !DIFile(filename: "essentials.jl", directory: ".")
!38 = !DILocation(line: 1215, scope: !39, inlinedAt: !41)
!39 = distinct !DISubprogram(name: "isempty;", linkageName: "isempty", scope: !40, file: !40, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!40 = !DIFile(filename: "abstractarray.jl", directory: ".")
!41 = !DILocation(line: 1462, scope: !42, inlinedAt: !44)
!42 = distinct !DISubprogram(name: "popfirst!;", linkageName: "popfirst!", scope: !43, file: !43, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!43 = !DIFile(filename: "array.jl", directory: ".")
!44 = !DILocation(line: 306, scope: !6)
!45 = !{!46, !46, i64 0}
!46 = !{!"jtbaa_arraylen", !47, i64 0}
!47 = !{!"jtbaa_array", !10, i64 0}
!48 = !{i64 0, i64 9223372036854775807}
!49 = !DILocation(line: 499, scope: !50, inlinedAt: !38)
!50 = distinct !DISubprogram(name: "==;", linkageName: "==", scope: !51, file: !51, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!51 = !DIFile(filename: "promotion.jl", directory: ".")
!52 = !DILocation(line: 1463, scope: !42, inlinedAt: !44)
!53 = !{!54, !54, i64 0}
!54 = !{!"jtbaa_tag", !55, i64 0}
!55 = !{!"jtbaa_data", !10, i64 0}
!56 = !{!57, !57, i64 0}
!57 = !{!"jtbaa_immut", !58, i64 0}
!58 = !{!"jtbaa_value", !55, i64 0}
!59 = !DILocation(line: 13, scope: !60, inlinedAt: !61)
!60 = distinct !DISubprogram(name: "getindex;", linkageName: "getindex", scope: !37, file: !37, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!61 = !DILocation(line: 1465, scope: !42, inlinedAt: !44)
!62 = !{!63, !63, i64 0}
!63 = !{!"jtbaa_arrayptr", !47, i64 0}
!64 = !{!65, !65, i64 0}
!65 = !{!"jtbaa_ptrarraybuf", !55, i64 0}
!66 = !DILocation(line: 1021, scope: !67, inlinedAt: !68)
!67 = distinct !DISubprogram(name: "_deletebeg!;", linkageName: "_deletebeg!", scope: !43, file: !43, type: !7, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !0)
!68 = !DILocation(line: 1466, scope: !42, inlinedAt: !44)
!69 = !DILocation(line: 307, scope: !6)
!70 = !DILocation(line: 314, scope: !6)
!71 = !{i64 96}
!72 = !{i64 8}
!73 = !{!19, !19, i64 0, i64 1}
!74 = !{!10, !10, i64 0}
$8 = void

We elimated the reference to julia.safepoint, but ofc the declaration is still around, that shouldn't cause Orc to search for it though...

vchuravy · 2022-12-28T14:47:26Z

@nanosoldier runtests()

nanosoldier · 2022-12-29T01:29:50Z

Your package evaluation job has completed - possible new issues were detected. A full report can be found here.

vchuravy added GC Garbage collector backport 1.9 Change should be backported to release-1.9 compiler:llvm For issues that relate to LLVM labels Oct 30, 2022

vchuravy requested review from pchintalapudi and vtjnash October 30, 2022 23:12

Keno approved these changes Oct 31, 2022

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KristofferC mentioned this pull request Nov 17, 2022

release-1.9: Backports for julia 1.9.0-alpha2 / 1.9.0-beta1 #47602

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vtjnash mentioned this pull request Dec 13, 2022

Segmentation fault with threads #47826

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KristofferC mentioned this pull request Dec 14, 2022

Backports for Julia 1.8.4 #47488

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vchuravy force-pushed the vc/safepoint branch from 7a42638 to 3ef7a67 Compare December 28, 2022 11:51

vchuravy marked this pull request as ready for review December 28, 2022 12:55

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KristofferC mentioned this pull request Dec 28, 2022

Backports for 1.9.0-beta2 #48026

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KristofferC mentioned this pull request Jan 2, 2023

Backports for julia 1.9.0-beta3 #48075

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Move safepoint emission to late-lowering

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vchuravy force-pushed the vc/safepoint branch from 351e578 to 5c2b098 Compare January 6, 2023 12:40

vchuravy added the merge me PR is reviewed. Merge when all tests are passing label Jan 6, 2023

giordano merged commit db7d762 into master Jan 8, 2023

giordano deleted the vc/safepoint branch January 8, 2023 15:03

giordano removed the merge me PR is reviewed. Merge when all tests are passing label Jan 8, 2023

giordano mentioned this pull request Jan 10, 2023

Change default output of [@]code_native to intel syntax #48103

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vchuravy removed the backport 1.9 Change should be backported to release-1.9 label Jan 13, 2023

kpamnany mentioned this pull request Sep 27, 2023

Stop running finalizers on exit #51466

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kpamnany pushed a commit to RelationalAI/julia that referenced this pull request Sep 27, 2023

Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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kpamnany mentioned this pull request Sep 27, 2023

Backport safepoints at function entry RelationalAI/julia#83

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Move safepoint emission to llvm-final-gc-lowering (JuliaLang#47393)

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Rare freeze on exit #50038

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