https://github.com/yuxuanchen1997 updated
https://github.com/llvm/llvm-project/pull/94693
>From 4e4bcdc19268543a8348736dede46d8f8cad0066 Mon Sep 17 00:00:00 2001
From: Yuxuan Chen <yuxuanchen1...@outlook.com>
Date: Tue, 4 Jun 2024 23:22:00 -0700
Subject: [PATCH 1/3] [Clang] Introduce [[clang::coro_inplace_task]]
---
clang/include/clang/AST/ExprCXX.h | 26 ++++--
clang/include/clang/Basic/Attr.td | 8 ++
clang/include/clang/Basic/AttrDocs.td | 19 +++++
clang/lib/CodeGen/CGBlocks.cpp | 5 +-
clang/lib/CodeGen/CGCUDARuntime.cpp | 5 +-
clang/lib/CodeGen/CGCUDARuntime.h | 8 +-
clang/lib/CodeGen/CGCXXABI.h | 10 +--
clang/lib/CodeGen/CGClass.cpp | 16 ++--
clang/lib/CodeGen/CGCoroutine.cpp | 30 +++++--
clang/lib/CodeGen/CGExpr.cpp | 41 +++++----
clang/lib/CodeGen/CGExprCXX.cpp | 60 +++++++------
clang/lib/CodeGen/CodeGenFunction.h | 64 ++++++++------
clang/lib/CodeGen/ItaniumCXXABI.cpp | 16 ++--
clang/lib/CodeGen/MicrosoftCXXABI.cpp | 18 ++--
clang/lib/Sema/SemaCoroutine.cpp | 58 ++++++++++++-
clang/lib/Serialization/ASTReaderStmt.cpp | 10 ++-
clang/lib/Serialization/ASTWriterStmt.cpp | 3 +-
clang/test/CodeGenCoroutines/Inputs/utility.h | 13 +++
.../coro-structured-concurrency.cpp | 84 +++++++++++++++++++
...a-attribute-supported-attributes-list.test | 1 +
llvm/include/llvm/IR/Intrinsics.td | 3 +
.../lib/Transforms/Coroutines/CoroCleanup.cpp | 9 +-
llvm/lib/Transforms/Coroutines/CoroElide.cpp | 58 ++++++++++++-
llvm/lib/Transforms/Coroutines/Coroutines.cpp | 1 +
.../coro-elide-structured-concurrency.ll | 64 ++++++++++++++
25 files changed, 496 insertions(+), 134 deletions(-)
create mode 100644 clang/test/CodeGenCoroutines/Inputs/utility.h
create mode 100644 clang/test/CodeGenCoroutines/coro-structured-concurrency.cpp
create mode 100644
llvm/test/Transforms/Coroutines/coro-elide-structured-concurrency.ll
diff --git a/clang/include/clang/AST/ExprCXX.h
b/clang/include/clang/AST/ExprCXX.h
index c2feac525c1e..0cf62aee41b6 100644
--- a/clang/include/clang/AST/ExprCXX.h
+++ b/clang/include/clang/AST/ExprCXX.h
@@ -5082,7 +5082,8 @@ class CoroutineSuspendExpr : public Expr {
enum SubExpr { Operand, Common, Ready, Suspend, Resume, Count };
Stmt *SubExprs[SubExpr::Count];
- OpaqueValueExpr *OpaqueValue = nullptr;
+ OpaqueValueExpr *CommonExprOpaqueValue = nullptr;
+ OpaqueValueExpr *InplaceCallOpaqueValue = nullptr;
public:
// These types correspond to the three C++ 'await_suspend' return variants
@@ -5090,10 +5091,10 @@ class CoroutineSuspendExpr : public Expr {
CoroutineSuspendExpr(StmtClass SC, SourceLocation KeywordLoc, Expr *Operand,
Expr *Common, Expr *Ready, Expr *Suspend, Expr *Resume,
- OpaqueValueExpr *OpaqueValue)
+ OpaqueValueExpr *CommonExprOpaqueValue)
: Expr(SC, Resume->getType(), Resume->getValueKind(),
Resume->getObjectKind()),
- KeywordLoc(KeywordLoc), OpaqueValue(OpaqueValue) {
+ KeywordLoc(KeywordLoc), CommonExprOpaqueValue(CommonExprOpaqueValue) {
SubExprs[SubExpr::Operand] = Operand;
SubExprs[SubExpr::Common] = Common;
SubExprs[SubExpr::Ready] = Ready;
@@ -5128,7 +5129,16 @@ class CoroutineSuspendExpr : public Expr {
}
/// getOpaqueValue - Return the opaque value placeholder.
- OpaqueValueExpr *getOpaqueValue() const { return OpaqueValue; }
+ OpaqueValueExpr *getCommonExprOpaqueValue() const {
+ return CommonExprOpaqueValue;
+ }
+
+ OpaqueValueExpr *getInplaceCallOpaqueValue() const {
+ return InplaceCallOpaqueValue;
+ }
+ void setInplaceCallOpaqueValue(OpaqueValueExpr *E) {
+ InplaceCallOpaqueValue = E;
+ }
Expr *getReadyExpr() const {
return static_cast<Expr*>(SubExprs[SubExpr::Ready]);
@@ -5194,9 +5204,9 @@ class CoawaitExpr : public CoroutineSuspendExpr {
public:
CoawaitExpr(SourceLocation CoawaitLoc, Expr *Operand, Expr *Common,
Expr *Ready, Expr *Suspend, Expr *Resume,
- OpaqueValueExpr *OpaqueValue, bool IsImplicit = false)
+ OpaqueValueExpr *CommonExprOpaqueValue, bool IsImplicit = false)
: CoroutineSuspendExpr(CoawaitExprClass, CoawaitLoc, Operand, Common,
- Ready, Suspend, Resume, OpaqueValue) {
+ Ready, Suspend, Resume, CommonExprOpaqueValue) {
CoawaitBits.IsImplicit = IsImplicit;
}
@@ -5275,9 +5285,9 @@ class CoyieldExpr : public CoroutineSuspendExpr {
public:
CoyieldExpr(SourceLocation CoyieldLoc, Expr *Operand, Expr *Common,
Expr *Ready, Expr *Suspend, Expr *Resume,
- OpaqueValueExpr *OpaqueValue)
+ OpaqueValueExpr *CommonExprOpaqueValue)
: CoroutineSuspendExpr(CoyieldExprClass, CoyieldLoc, Operand, Common,
- Ready, Suspend, Resume, OpaqueValue) {}
+ Ready, Suspend, Resume, CommonExprOpaqueValue) {}
CoyieldExpr(SourceLocation CoyieldLoc, QualType Ty, Expr *Operand,
Expr *Common)
: CoroutineSuspendExpr(CoyieldExprClass, CoyieldLoc, Ty, Operand,
diff --git a/clang/include/clang/Basic/Attr.td
b/clang/include/clang/Basic/Attr.td
index d2d9dd24536c..2f02a1f9e3a0 100644
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -1217,6 +1217,14 @@ def CoroDisableLifetimeBound : InheritableAttr {
let SimpleHandler = 1;
}
+def CoroInplaceTask : InheritableAttr {
+ let Spellings = [Clang<"coro_inplace_task">];
+ let Subjects = SubjectList<[CXXRecord]>;
+ let LangOpts = [CPlusPlus];
+ let Documentation = [CoroInplaceTaskDoc];
+ let SimpleHandler = 1;
+}
+
// OSObject-based attributes.
def OSConsumed : InheritableParamAttr {
let Spellings = [Clang<"os_consumed">];
diff --git a/clang/include/clang/Basic/AttrDocs.td
b/clang/include/clang/Basic/AttrDocs.td
index ab4bd003541f..f8b3d1b0f19c 100644
--- a/clang/include/clang/Basic/AttrDocs.td
+++ b/clang/include/clang/Basic/AttrDocs.td
@@ -8013,6 +8013,25 @@ but do not pass them to the underlying coroutine or pass
them by value.
}];
}
+def CoroInplaceTaskDoc : Documentation {
+ let Category = DocCatDecl;
+ let Content = [{
+The ``[[clang::coro_inplace_task]]`` is a class attribute which can be applied
+to a coroutine return type.
+
+When a coroutine function that returns such a type calls another coroutine
function,
+the compiler performs heap allocation elision when the following conditions
are all met:
+- callee coroutine function returns a type that is annotated with
``[[clang::coro_inplace_task]]``.
+- The callee coroutine function is inlined.
+- In caller coroutine, the return value of the callee is a prvalue or an
xvalue, and
+- The temporary expression containing the callee coroutine object is
immediately co_awaited.
+
+The behavior is undefined if any of the following condition was met:
+- the caller coroutine is destroyed earlier than the callee coroutine.
+
+ }];
+}
+
def CountedByDocs : Documentation {
let Category = DocCatField;
let Content = [{
diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
index 066139b1c78c..684fda744073 100644
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/lib/CodeGen/CGBlocks.cpp
@@ -1163,7 +1163,8 @@ llvm::Type *CodeGenModule::getGenericBlockLiteralType() {
}
RValue CodeGenFunction::EmitBlockCallExpr(const CallExpr *E,
- ReturnValueSlot ReturnValue) {
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke) {
const auto *BPT = E->getCallee()->getType()->castAs<BlockPointerType>();
llvm::Value *BlockPtr = EmitScalarExpr(E->getCallee());
llvm::Type *GenBlockTy = CGM.getGenericBlockLiteralType();
@@ -1220,7 +1221,7 @@ RValue CodeGenFunction::EmitBlockCallExpr(const CallExpr
*E,
CGCallee Callee(CGCalleeInfo(), Func);
// And call the block.
- return EmitCall(FnInfo, Callee, ReturnValue, Args);
+ return EmitCall(FnInfo, Callee, ReturnValue, Args, CallOrInvoke);
}
Address CodeGenFunction::GetAddrOfBlockDecl(const VarDecl *variable) {
diff --git a/clang/lib/CodeGen/CGCUDARuntime.cpp
b/clang/lib/CodeGen/CGCUDARuntime.cpp
index c14a9d3f2bbb..1e1da1e2411a 100644
--- a/clang/lib/CodeGen/CGCUDARuntime.cpp
+++ b/clang/lib/CodeGen/CGCUDARuntime.cpp
@@ -25,7 +25,8 @@ CGCUDARuntime::~CGCUDARuntime() {}
RValue CGCUDARuntime::EmitCUDAKernelCallExpr(CodeGenFunction &CGF,
const CUDAKernelCallExpr *E,
- ReturnValueSlot ReturnValue) {
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke) {
llvm::BasicBlock *ConfigOKBlock = CGF.createBasicBlock("kcall.configok");
llvm::BasicBlock *ContBlock = CGF.createBasicBlock("kcall.end");
@@ -35,7 +36,7 @@ RValue CGCUDARuntime::EmitCUDAKernelCallExpr(CodeGenFunction
&CGF,
eval.begin(CGF);
CGF.EmitBlock(ConfigOKBlock);
- CGF.EmitSimpleCallExpr(E, ReturnValue);
+ CGF.EmitSimpleCallExpr(E, ReturnValue, CallOrInvoke);
CGF.EmitBranch(ContBlock);
CGF.EmitBlock(ContBlock);
diff --git a/clang/lib/CodeGen/CGCUDARuntime.h
b/clang/lib/CodeGen/CGCUDARuntime.h
index 8030d632cc3d..86f776004ee7 100644
--- a/clang/lib/CodeGen/CGCUDARuntime.h
+++ b/clang/lib/CodeGen/CGCUDARuntime.h
@@ -21,6 +21,7 @@
#include "llvm/IR/GlobalValue.h"
namespace llvm {
+class CallBase;
class Function;
class GlobalVariable;
}
@@ -82,9 +83,10 @@ class CGCUDARuntime {
CGCUDARuntime(CodeGenModule &CGM) : CGM(CGM) {}
virtual ~CGCUDARuntime();
- virtual RValue EmitCUDAKernelCallExpr(CodeGenFunction &CGF,
- const CUDAKernelCallExpr *E,
- ReturnValueSlot ReturnValue);
+ virtual RValue
+ EmitCUDAKernelCallExpr(CodeGenFunction &CGF, const CUDAKernelCallExpr *E,
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke = nullptr);
/// Emits a kernel launch stub.
virtual void emitDeviceStub(CodeGenFunction &CGF, FunctionArgList &Args) = 0;
diff --git a/clang/lib/CodeGen/CGCXXABI.h b/clang/lib/CodeGen/CGCXXABI.h
index 7dcc53911199..687ff7fb8444 100644
--- a/clang/lib/CodeGen/CGCXXABI.h
+++ b/clang/lib/CodeGen/CGCXXABI.h
@@ -485,11 +485,11 @@ class CGCXXABI {
llvm::PointerUnion<const CXXDeleteExpr *, const CXXMemberCallExpr *>;
/// Emit the ABI-specific virtual destructor call.
- virtual llvm::Value *EmitVirtualDestructorCall(CodeGenFunction &CGF,
- const CXXDestructorDecl *Dtor,
- CXXDtorType DtorType,
- Address This,
- DeleteOrMemberCallExpr E) = 0;
+ virtual llvm::Value *
+ EmitVirtualDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl
*Dtor,
+ CXXDtorType DtorType, Address This,
+ DeleteOrMemberCallExpr E,
+ llvm::CallBase **CallOrInvoke) = 0;
virtual void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF,
GlobalDecl GD,
diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp
index 0a595bb998d2..c56716fbd059 100644
--- a/clang/lib/CodeGen/CGClass.cpp
+++ b/clang/lib/CodeGen/CGClass.cpp
@@ -2191,15 +2191,11 @@ static bool canEmitDelegateCallArgs(CodeGenFunction
&CGF,
return true;
}
-void CodeGenFunction::EmitCXXConstructorCall(const CXXConstructorDecl *D,
- CXXCtorType Type,
- bool ForVirtualBase,
- bool Delegating,
- Address This,
- CallArgList &Args,
- AggValueSlot::Overlap_t Overlap,
- SourceLocation Loc,
- bool NewPointerIsChecked) {
+void CodeGenFunction::EmitCXXConstructorCall(
+ const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase,
+ bool Delegating, Address This, CallArgList &Args,
+ AggValueSlot::Overlap_t Overlap, SourceLocation Loc,
+ bool NewPointerIsChecked, llvm::CallBase **CallOrInvoke) {
const CXXRecordDecl *ClassDecl = D->getParent();
if (!NewPointerIsChecked)
@@ -2247,7 +2243,7 @@ void CodeGenFunction::EmitCXXConstructorCall(const
CXXConstructorDecl *D,
const CGFunctionInfo &Info = CGM.getTypes().arrangeCXXConstructorCall(
Args, D, Type, ExtraArgs.Prefix, ExtraArgs.Suffix, PassPrototypeArgs);
CGCallee Callee = CGCallee::forDirect(CalleePtr, GlobalDecl(D, Type));
- EmitCall(Info, Callee, ReturnValueSlot(), Args, nullptr, false, Loc);
+ EmitCall(Info, Callee, ReturnValueSlot(), Args, CallOrInvoke, false, Loc);
// Generate vtable assumptions if we're constructing a complete object
// with a vtable. We don't do this for base subobjects for two reasons:
diff --git a/clang/lib/CodeGen/CGCoroutine.cpp
b/clang/lib/CodeGen/CGCoroutine.cpp
index a8a70186c2c5..656c1e905317 100644
--- a/clang/lib/CodeGen/CGCoroutine.cpp
+++ b/clang/lib/CodeGen/CGCoroutine.cpp
@@ -12,9 +12,11 @@
#include "CGCleanup.h"
#include "CodeGenFunction.h"
-#include "llvm/ADT/ScopeExit.h"
+#include "clang/AST/ExprCXX.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtVisitor.h"
+#include "llvm/ADT/ScopeExit.h"
+#include "llvm/IR/Intrinsics.h"
using namespace clang;
using namespace CodeGen;
@@ -223,12 +225,22 @@ static LValueOrRValue
emitSuspendExpression(CodeGenFunction &CGF, CGCoroData &Co
CoroutineSuspendExpr const &S,
AwaitKind Kind, AggValueSlot aggSlot,
bool ignoreResult, bool forLValue) {
- auto *E = S.getCommonExpr();
+ auto &Builder = CGF.Builder;
- auto CommonBinder =
- CodeGenFunction::OpaqueValueMappingData::bind(CGF, S.getOpaqueValue(),
E);
- auto UnbindCommonOnExit =
- llvm::make_scope_exit([&] { CommonBinder.unbind(CGF); });
+ // If S.getInplaceCallOpaqueValue() is null, we don't have a nested opaque
+ // value for common expression.
+ std::optional<CodeGenFunction::OpaqueValueMapping> OperandMapping;
+ if (auto *CallOV = S.getInplaceCallOpaqueValue()) {
+ auto *CE = cast<CallExpr>(CallOV->getSourceExpr());
+ // TODO: don't use the intrisic coro_safe_elide in the next version.
+ LValue CallResult = CGF.EmitCallExprLValue(CE, nullptr);
+ OperandMapping.emplace(CGF, CallOV, CallResult);
+ llvm::Value *Value = CallResult.getPointer(CGF);
+ auto SafeElide = CGF.CGM.getIntrinsic(llvm::Intrinsic::coro_safe_elide);
+ Builder.CreateCall(SafeElide, Value);
+ }
+ CodeGenFunction::OpaqueValueMapping BindCommon(CGF,
+ S.getCommonExprOpaqueValue());
auto Prefix = buildSuspendPrefixStr(Coro, Kind);
BasicBlock *ReadyBlock = CGF.createBasicBlock(Prefix + Twine(".ready"));
@@ -241,7 +253,6 @@ static LValueOrRValue emitSuspendExpression(CodeGenFunction
&CGF, CGCoroData &Co
// Otherwise, emit suspend logic.
CGF.EmitBlock(SuspendBlock);
- auto &Builder = CGF.Builder;
llvm::Function *CoroSave = CGF.CGM.getIntrinsic(llvm::Intrinsic::coro_save);
auto *NullPtr = llvm::ConstantPointerNull::get(CGF.CGM.Int8PtrTy);
auto *SaveCall = Builder.CreateCall(CoroSave, {NullPtr});
@@ -256,7 +267,8 @@ static LValueOrRValue emitSuspendExpression(CodeGenFunction
&CGF, CGCoroData &Co
SmallVector<llvm::Value *, 3> SuspendIntrinsicCallArgs;
SuspendIntrinsicCallArgs.push_back(
- CGF.getOrCreateOpaqueLValueMapping(S.getOpaqueValue()).getPointer(CGF));
+ CGF.getOrCreateOpaqueLValueMapping(S.getCommonExprOpaqueValue())
+ .getPointer(CGF));
SuspendIntrinsicCallArgs.push_back(CGF.CurCoro.Data->CoroBegin);
SuspendIntrinsicCallArgs.push_back(SuspendWrapper);
@@ -455,7 +467,7 @@ CodeGenFunction::generateAwaitSuspendWrapper(Twine const
&CoroName,
Builder.CreateLoad(GetAddrOfLocalVar(&FrameDecl));
auto AwaiterBinder = CodeGenFunction::OpaqueValueMappingData::bind(
- *this, S.getOpaqueValue(), AwaiterLValue);
+ *this, S.getCommonExprOpaqueValue(), AwaiterLValue);
auto *SuspendRet = EmitScalarExpr(S.getSuspendExpr());
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 039f60c77459..a4ff896fca6a 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -5429,16 +5429,17 @@ RValue CodeGenFunction::EmitRValueForField(LValue LV,
//===--------------------------------------------------------------------===//
RValue CodeGenFunction::EmitCallExpr(const CallExpr *E,
- ReturnValueSlot ReturnValue) {
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke) {
// Builtins never have block type.
if (E->getCallee()->getType()->isBlockPointerType())
- return EmitBlockCallExpr(E, ReturnValue);
+ return EmitBlockCallExpr(E, ReturnValue, CallOrInvoke);
if (const auto *CE = dyn_cast<CXXMemberCallExpr>(E))
- return EmitCXXMemberCallExpr(CE, ReturnValue);
+ return EmitCXXMemberCallExpr(CE, ReturnValue, CallOrInvoke);
if (const auto *CE = dyn_cast<CUDAKernelCallExpr>(E))
- return EmitCUDAKernelCallExpr(CE, ReturnValue);
+ return EmitCUDAKernelCallExpr(CE, ReturnValue, CallOrInvoke);
// A CXXOperatorCallExpr is created even for explicit object methods, but
// these should be treated like static function call.
@@ -5446,7 +5447,7 @@ RValue CodeGenFunction::EmitCallExpr(const CallExpr *E,
if (const auto *MD =
dyn_cast_if_present<CXXMethodDecl>(CE->getCalleeDecl());
MD && MD->isImplicitObjectMemberFunction())
- return EmitCXXOperatorMemberCallExpr(CE, MD, ReturnValue);
+ return EmitCXXOperatorMemberCallExpr(CE, MD, ReturnValue, CallOrInvoke);
CGCallee callee = EmitCallee(E->getCallee());
@@ -5459,14 +5460,17 @@ RValue CodeGenFunction::EmitCallExpr(const CallExpr *E,
return EmitCXXPseudoDestructorExpr(callee.getPseudoDestructorExpr());
}
- return EmitCall(E->getCallee()->getType(), callee, E, ReturnValue);
+ return EmitCall(E->getCallee()->getType(), callee, E, ReturnValue,
+ /*Chain=*/nullptr, CallOrInvoke);
}
/// Emit a CallExpr without considering whether it might be a subclass.
RValue CodeGenFunction::EmitSimpleCallExpr(const CallExpr *E,
- ReturnValueSlot ReturnValue) {
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke) {
CGCallee Callee = EmitCallee(E->getCallee());
- return EmitCall(E->getCallee()->getType(), Callee, E, ReturnValue);
+ return EmitCall(E->getCallee()->getType(), Callee, E, ReturnValue,
+ /*Chain=*/nullptr, CallOrInvoke);
}
// Detect the unusual situation where an inline version is shadowed by a
@@ -5670,8 +5674,9 @@ LValue CodeGenFunction::EmitBinaryOperatorLValue(const
BinaryOperator *E) {
llvm_unreachable("bad evaluation kind");
}
-LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) {
- RValue RV = EmitCallExpr(E);
+LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E,
+ llvm::CallBase **CallOrInvoke) {
+ RValue RV = EmitCallExpr(E, ReturnValueSlot(), CallOrInvoke);
if (!RV.isScalar())
return MakeAddrLValue(RV.getAggregateAddress(), E->getType(),
@@ -5794,9 +5799,11 @@ LValue CodeGenFunction::EmitStmtExprLValue(const
StmtExpr *E) {
AlignmentSource::Decl);
}
-RValue CodeGenFunction::EmitCall(QualType CalleeType, const CGCallee
&OrigCallee,
- const CallExpr *E, ReturnValueSlot
ReturnValue,
- llvm::Value *Chain) {
+RValue CodeGenFunction::EmitCall(QualType CalleeType,
+ const CGCallee &OrigCallee, const CallExpr *E,
+ ReturnValueSlot ReturnValue,
+ llvm::Value *Chain,
+ llvm::CallBase **CallOrInvoke) {
// Get the actual function type. The callee type will always be a pointer to
// function type or a block pointer type.
assert(CalleeType->isFunctionPointerType() &&
@@ -6007,8 +6014,8 @@ RValue CodeGenFunction::EmitCall(QualType CalleeType,
const CGCallee &OrigCallee
Address(Handle, Handle->getType(), CGM.getPointerAlign()));
Callee.setFunctionPointer(Stub);
}
- llvm::CallBase *CallOrInvoke = nullptr;
- RValue Call = EmitCall(FnInfo, Callee, ReturnValue, Args, &CallOrInvoke,
+ llvm::CallBase *LocalCallOrInvoke = nullptr;
+ RValue Call = EmitCall(FnInfo, Callee, ReturnValue, Args, &LocalCallOrInvoke,
E == MustTailCall, E->getExprLoc());
// Generate function declaration DISuprogram in order to be used
@@ -6017,11 +6024,13 @@ RValue CodeGenFunction::EmitCall(QualType CalleeType,
const CGCallee &OrigCallee
if (auto *CalleeDecl = dyn_cast_or_null<FunctionDecl>(TargetDecl)) {
FunctionArgList Args;
QualType ResTy = BuildFunctionArgList(CalleeDecl, Args);
- DI->EmitFuncDeclForCallSite(CallOrInvoke,
+ DI->EmitFuncDeclForCallSite(LocalCallOrInvoke,
DI->getFunctionType(CalleeDecl, ResTy, Args),
CalleeDecl);
}
}
+ if (CallOrInvoke)
+ *CallOrInvoke = LocalCallOrInvoke;
return Call;
}
diff --git a/clang/lib/CodeGen/CGExprCXX.cpp b/clang/lib/CodeGen/CGExprCXX.cpp
index 8eb6ab7381ac..1214bb054fb8 100644
--- a/clang/lib/CodeGen/CGExprCXX.cpp
+++ b/clang/lib/CodeGen/CGExprCXX.cpp
@@ -84,23 +84,24 @@ commonEmitCXXMemberOrOperatorCall(CodeGenFunction &CGF,
GlobalDecl GD,
RValue CodeGenFunction::EmitCXXMemberOrOperatorCall(
const CXXMethodDecl *MD, const CGCallee &Callee,
- ReturnValueSlot ReturnValue,
- llvm::Value *This, llvm::Value *ImplicitParam, QualType ImplicitParamTy,
- const CallExpr *CE, CallArgList *RtlArgs) {
+ ReturnValueSlot ReturnValue, llvm::Value *This, llvm::Value *ImplicitParam,
+ QualType ImplicitParamTy, const CallExpr *CE, CallArgList *RtlArgs,
+ llvm::CallBase **CallOrInvoke) {
const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>();
CallArgList Args;
MemberCallInfo CallInfo = commonEmitCXXMemberOrOperatorCall(
*this, MD, This, ImplicitParam, ImplicitParamTy, CE, Args, RtlArgs);
auto &FnInfo = CGM.getTypes().arrangeCXXMethodCall(
Args, FPT, CallInfo.ReqArgs, CallInfo.PrefixSize);
- return EmitCall(FnInfo, Callee, ReturnValue, Args, nullptr,
+ return EmitCall(FnInfo, Callee, ReturnValue, Args, CallOrInvoke,
CE && CE == MustTailCall,
CE ? CE->getExprLoc() : SourceLocation());
}
RValue CodeGenFunction::EmitCXXDestructorCall(
GlobalDecl Dtor, const CGCallee &Callee, llvm::Value *This, QualType
ThisTy,
- llvm::Value *ImplicitParam, QualType ImplicitParamTy, const CallExpr *CE) {
+ llvm::Value *ImplicitParam, QualType ImplicitParamTy, const CallExpr *CE,
+ llvm::CallBase **CallOrInvoke) {
const CXXMethodDecl *DtorDecl = cast<CXXMethodDecl>(Dtor.getDecl());
assert(!ThisTy.isNull());
@@ -120,7 +121,8 @@ RValue CodeGenFunction::EmitCXXDestructorCall(
commonEmitCXXMemberOrOperatorCall(*this, Dtor, This, ImplicitParam,
ImplicitParamTy, CE, Args, nullptr);
return EmitCall(CGM.getTypes().arrangeCXXStructorDeclaration(Dtor), Callee,
- ReturnValueSlot(), Args, nullptr, CE && CE == MustTailCall,
+ ReturnValueSlot(), Args, CallOrInvoke,
+ CE && CE == MustTailCall,
CE ? CE->getExprLoc() : SourceLocation{});
}
@@ -186,11 +188,12 @@ static CXXRecordDecl *getCXXRecord(const Expr *E) {
// Note: This function also emit constructor calls to support a MSVC
// extensions allowing explicit constructor function call.
RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
- ReturnValueSlot ReturnValue) {
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke) {
const Expr *callee = CE->getCallee()->IgnoreParens();
if (isa<BinaryOperator>(callee))
- return EmitCXXMemberPointerCallExpr(CE, ReturnValue);
+ return EmitCXXMemberPointerCallExpr(CE, ReturnValue, CallOrInvoke);
const MemberExpr *ME = cast<MemberExpr>(callee);
const CXXMethodDecl *MD = cast<CXXMethodDecl>(ME->getMemberDecl());
@@ -200,7 +203,7 @@ RValue CodeGenFunction::EmitCXXMemberCallExpr(const
CXXMemberCallExpr *CE,
CGCallee callee =
CGCallee::forDirect(CGM.GetAddrOfFunction(MD), GlobalDecl(MD));
return EmitCall(getContext().getPointerType(MD->getType()), callee, CE,
- ReturnValue);
+ ReturnValue, /*Chain=*/nullptr, CallOrInvoke);
}
bool HasQualifier = ME->hasQualifier();
@@ -208,14 +211,15 @@ RValue CodeGenFunction::EmitCXXMemberCallExpr(const
CXXMemberCallExpr *CE,
bool IsArrow = ME->isArrow();
const Expr *Base = ME->getBase();
- return EmitCXXMemberOrOperatorMemberCallExpr(
- CE, MD, ReturnValue, HasQualifier, Qualifier, IsArrow, Base);
+ return EmitCXXMemberOrOperatorMemberCallExpr(CE, MD, ReturnValue,
+ HasQualifier, Qualifier,
IsArrow,
+ Base, CallOrInvoke);
}
RValue CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(
const CallExpr *CE, const CXXMethodDecl *MD, ReturnValueSlot ReturnValue,
bool HasQualifier, NestedNameSpecifier *Qualifier, bool IsArrow,
- const Expr *Base) {
+ const Expr *Base, llvm::CallBase **CallOrInvoke) {
assert(isa<CXXMemberCallExpr>(CE) || isa<CXXOperatorCallExpr>(CE));
// Compute the object pointer.
@@ -300,7 +304,7 @@ RValue
CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(
EmitCXXConstructorCall(Ctor, Ctor_Complete, /*ForVirtualBase=*/false,
/*Delegating=*/false, This.getAddress(), Args,
AggValueSlot::DoesNotOverlap, CE->getExprLoc(),
- /*NewPointerIsChecked=*/false);
+ /*NewPointerIsChecked=*/false, CallOrInvoke);
return RValue::get(nullptr);
}
@@ -374,9 +378,9 @@ RValue
CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(
"Destructor shouldn't have explicit parameters");
assert(ReturnValue.isNull() && "Destructor shouldn't have return value");
if (UseVirtualCall) {
- CGM.getCXXABI().EmitVirtualDestructorCall(*this, Dtor, Dtor_Complete,
- This.getAddress(),
- cast<CXXMemberCallExpr>(CE));
+ CGM.getCXXABI().EmitVirtualDestructorCall(
+ *this, Dtor, Dtor_Complete, This.getAddress(),
+ cast<CXXMemberCallExpr>(CE), CallOrInvoke);
} else {
GlobalDecl GD(Dtor, Dtor_Complete);
CGCallee Callee;
@@ -393,7 +397,7 @@ RValue
CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(
IsArrow ? Base->getType()->getPointeeType() : Base->getType();
EmitCXXDestructorCall(GD, Callee, This.getPointer(*this), ThisTy,
/*ImplicitParam=*/nullptr,
- /*ImplicitParamTy=*/QualType(), CE);
+ /*ImplicitParamTy=*/QualType(), CE, CallOrInvoke);
}
return RValue::get(nullptr);
}
@@ -435,12 +439,13 @@ RValue
CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(
return EmitCXXMemberOrOperatorCall(
CalleeDecl, Callee, ReturnValue, This.getPointer(*this),
- /*ImplicitParam=*/nullptr, QualType(), CE, RtlArgs);
+ /*ImplicitParam=*/nullptr, QualType(), CE, RtlArgs, CallOrInvoke);
}
RValue
CodeGenFunction::EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
- ReturnValueSlot ReturnValue) {
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke) {
const BinaryOperator *BO =
cast<BinaryOperator>(E->getCallee()->IgnoreParens());
const Expr *BaseExpr = BO->getLHS();
@@ -484,24 +489,25 @@ CodeGenFunction::EmitCXXMemberPointerCallExpr(const
CXXMemberCallExpr *E,
EmitCallArgs(Args, FPT, E->arguments());
return EmitCall(CGM.getTypes().arrangeCXXMethodCall(Args, FPT, required,
/*PrefixSize=*/0),
- Callee, ReturnValue, Args, nullptr, E == MustTailCall,
+ Callee, ReturnValue, Args, CallOrInvoke, E == MustTailCall,
E->getExprLoc());
}
-RValue
-CodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
- const CXXMethodDecl *MD,
- ReturnValueSlot ReturnValue) {
+RValue CodeGenFunction::EmitCXXOperatorMemberCallExpr(
+ const CXXOperatorCallExpr *E, const CXXMethodDecl *MD,
+ ReturnValueSlot ReturnValue, llvm::CallBase **CallOrInvoke) {
assert(MD->isImplicitObjectMemberFunction() &&
"Trying to emit a member call expr on a static method!");
return EmitCXXMemberOrOperatorMemberCallExpr(
E, MD, ReturnValue, /*HasQualifier=*/false, /*Qualifier=*/nullptr,
- /*IsArrow=*/false, E->getArg(0));
+ /*IsArrow=*/false, E->getArg(0), CallOrInvoke);
}
RValue CodeGenFunction::EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E,
- ReturnValueSlot ReturnValue) {
- return CGM.getCUDARuntime().EmitCUDAKernelCallExpr(*this, E, ReturnValue);
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke) {
+ return CGM.getCUDARuntime().EmitCUDAKernelCallExpr(*this, E, ReturnValue,
+ CallOrInvoke);
}
static void EmitNullBaseClassInitialization(CodeGenFunction &CGF,
diff --git a/clang/lib/CodeGen/CodeGenFunction.h
b/clang/lib/CodeGen/CodeGenFunction.h
index 13f12b5d878a..883504c10927 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -3142,7 +3142,8 @@ class CodeGenFunction : public CodeGenTypeCache {
bool ForVirtualBase, bool Delegating,
Address This, CallArgList &Args,
AggValueSlot::Overlap_t Overlap,
- SourceLocation Loc, bool NewPointerIsChecked);
+ SourceLocation Loc, bool NewPointerIsChecked,
+ llvm::CallBase **CallOrInvoke = nullptr);
/// Emit assumption load for all bases. Requires to be called only on
/// most-derived class and not under construction of the object.
@@ -4256,7 +4257,8 @@ class CodeGenFunction : public CodeGenTypeCache {
LValue EmitBinaryOperatorLValue(const BinaryOperator *E);
LValue EmitCompoundAssignmentLValue(const CompoundAssignOperator *E);
// Note: only available for agg return types
- LValue EmitCallExprLValue(const CallExpr *E);
+ LValue EmitCallExprLValue(const CallExpr *E,
+ llvm::CallBase **CallOrInvoke = nullptr);
// Note: only available for agg return types
LValue EmitVAArgExprLValue(const VAArgExpr *E);
LValue EmitDeclRefLValue(const DeclRefExpr *E);
@@ -4366,20 +4368,26 @@ class CodeGenFunction : public CodeGenTypeCache {
/// LLVM arguments and the types they were derived from.
RValue EmitCall(const CGFunctionInfo &CallInfo, const CGCallee &Callee,
ReturnValueSlot ReturnValue, const CallArgList &Args,
- llvm::CallBase **callOrInvoke, bool IsMustTail,
+ llvm::CallBase **CallOrInvoke, bool IsMustTail,
SourceLocation Loc);
RValue EmitCall(const CGFunctionInfo &CallInfo, const CGCallee &Callee,
ReturnValueSlot ReturnValue, const CallArgList &Args,
- llvm::CallBase **callOrInvoke = nullptr,
+ llvm::CallBase **CallOrInvoke = nullptr,
bool IsMustTail = false) {
- return EmitCall(CallInfo, Callee, ReturnValue, Args, callOrInvoke,
+ return EmitCall(CallInfo, Callee, ReturnValue, Args, CallOrInvoke,
IsMustTail, SourceLocation());
}
RValue EmitCall(QualType FnType, const CGCallee &Callee, const CallExpr *E,
- ReturnValueSlot ReturnValue, llvm::Value *Chain = nullptr);
+ ReturnValueSlot ReturnValue, llvm::Value *Chain = nullptr,
+ llvm::CallBase **CallOrInvoke = nullptr);
+
+ // If a Call or Invoke instruction was emitted for this CallExpr, this method
+ // writes the pointer to `CallOrInvoke` if it's not null.
RValue EmitCallExpr(const CallExpr *E,
- ReturnValueSlot ReturnValue = ReturnValueSlot());
- RValue EmitSimpleCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);
+ ReturnValueSlot ReturnValue = ReturnValueSlot(),
+ llvm::CallBase **CallOrInvoke = nullptr);
+ RValue EmitSimpleCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke = nullptr);
CGCallee EmitCallee(const Expr *E);
void checkTargetFeatures(const CallExpr *E, const FunctionDecl *TargetDecl);
@@ -4467,25 +4475,23 @@ class CodeGenFunction : public CodeGenTypeCache {
void callCStructCopyAssignmentOperator(LValue Dst, LValue Src);
void callCStructMoveAssignmentOperator(LValue Dst, LValue Src);
- RValue
- EmitCXXMemberOrOperatorCall(const CXXMethodDecl *Method,
- const CGCallee &Callee,
- ReturnValueSlot ReturnValue, llvm::Value *This,
- llvm::Value *ImplicitParam,
- QualType ImplicitParamTy, const CallExpr *E,
- CallArgList *RtlArgs);
+ RValue EmitCXXMemberOrOperatorCall(
+ const CXXMethodDecl *Method, const CGCallee &Callee,
+ ReturnValueSlot ReturnValue, llvm::Value *This,
+ llvm::Value *ImplicitParam, QualType ImplicitParamTy, const CallExpr *E,
+ CallArgList *RtlArgs, llvm::CallBase **CallOrInvoke);
RValue EmitCXXDestructorCall(GlobalDecl Dtor, const CGCallee &Callee,
llvm::Value *This, QualType ThisTy,
llvm::Value *ImplicitParam,
- QualType ImplicitParamTy, const CallExpr *E);
+ QualType ImplicitParamTy, const CallExpr *E,
+ llvm::CallBase **CallOrInvoke = nullptr);
RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E,
- ReturnValueSlot ReturnValue);
- RValue EmitCXXMemberOrOperatorMemberCallExpr(const CallExpr *CE,
- const CXXMethodDecl *MD,
- ReturnValueSlot ReturnValue,
- bool HasQualifier,
- NestedNameSpecifier *Qualifier,
- bool IsArrow, const Expr *Base);
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke = nullptr);
+ RValue EmitCXXMemberOrOperatorMemberCallExpr(
+ const CallExpr *CE, const CXXMethodDecl *MD, ReturnValueSlot ReturnValue,
+ bool HasQualifier, NestedNameSpecifier *Qualifier, bool IsArrow,
+ const Expr *Base, llvm::CallBase **CallOrInvoke);
// Compute the object pointer.
Address EmitCXXMemberDataPointerAddress(const Expr *E, Address base,
llvm::Value *memberPtr,
@@ -4493,15 +4499,18 @@ class CodeGenFunction : public CodeGenTypeCache {
LValueBaseInfo *BaseInfo = nullptr,
TBAAAccessInfo *TBAAInfo = nullptr);
RValue EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
- ReturnValueSlot ReturnValue);
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke);
RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
const CXXMethodDecl *MD,
- ReturnValueSlot ReturnValue);
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke);
RValue EmitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *E);
RValue EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E,
- ReturnValueSlot ReturnValue);
+ ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke);
RValue EmitNVPTXDevicePrintfCallExpr(const CallExpr *E);
RValue EmitAMDGPUDevicePrintfCallExpr(const CallExpr *E);
@@ -4524,7 +4533,8 @@ class CodeGenFunction : public CodeGenTypeCache {
const analyze_os_log::OSLogBufferLayout &Layout,
CharUnits BufferAlignment);
- RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);
+ RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue,
+ llvm::CallBase **CallOrInvoke);
/// EmitTargetBuiltinExpr - Emit the given builtin call. Returns 0 if the
call
/// is unhandled by the current target.
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp
b/clang/lib/CodeGen/ItaniumCXXABI.cpp
index e1d056765a86..8c2ad7e03cea 100644
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -315,10 +315,11 @@ class ItaniumCXXABI : public CodeGen::CGCXXABI {
Address This, llvm::Type *Ty,
SourceLocation Loc) override;
- llvm::Value *EmitVirtualDestructorCall(CodeGenFunction &CGF,
- const CXXDestructorDecl *Dtor,
- CXXDtorType DtorType, Address This,
- DeleteOrMemberCallExpr E) override;
+ llvm::Value *
+ EmitVirtualDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl
*Dtor,
+ CXXDtorType DtorType, Address This,
+ DeleteOrMemberCallExpr E,
+ llvm::CallBase **CallOrInvoke) override;
void emitVirtualInheritanceTables(const CXXRecordDecl *RD) override;
@@ -1257,7 +1258,8 @@ void
ItaniumCXXABI::emitVirtualObjectDelete(CodeGenFunction &CGF,
// FIXME: Provide a source location here even though there's no
// CXXMemberCallExpr for dtor call.
CXXDtorType DtorType = UseGlobalDelete ? Dtor_Complete : Dtor_Deleting;
- EmitVirtualDestructorCall(CGF, Dtor, DtorType, Ptr, DE);
+ EmitVirtualDestructorCall(CGF, Dtor, DtorType, Ptr, DE,
+ /*CallOrInvoke=*/nullptr);
if (UseGlobalDelete)
CGF.PopCleanupBlock();
@@ -2086,7 +2088,7 @@ CGCallee
ItaniumCXXABI::getVirtualFunctionPointer(CodeGenFunction &CGF,
llvm::Value *ItaniumCXXABI::EmitVirtualDestructorCall(
CodeGenFunction &CGF, const CXXDestructorDecl *Dtor, CXXDtorType DtorType,
- Address This, DeleteOrMemberCallExpr E) {
+ Address This, DeleteOrMemberCallExpr E, llvm::CallBase **CallOrInvoke) {
auto *CE = E.dyn_cast<const CXXMemberCallExpr *>();
auto *D = E.dyn_cast<const CXXDeleteExpr *>();
assert((CE != nullptr) ^ (D != nullptr));
@@ -2107,7 +2109,7 @@ llvm::Value *ItaniumCXXABI::EmitVirtualDestructorCall(
}
CGF.EmitCXXDestructorCall(GD, Callee, This.emitRawPointer(CGF), ThisTy,
- nullptr, QualType(), nullptr);
+ nullptr, QualType(), nullptr, CallOrInvoke);
return nullptr;
}
diff --git a/clang/lib/CodeGen/MicrosoftCXXABI.cpp
b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
index cc6740edabcd..24ae0ece4d70 100644
--- a/clang/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -334,10 +334,11 @@ class MicrosoftCXXABI : public CGCXXABI {
Address This, llvm::Type *Ty,
SourceLocation Loc) override;
- llvm::Value *EmitVirtualDestructorCall(CodeGenFunction &CGF,
- const CXXDestructorDecl *Dtor,
- CXXDtorType DtorType, Address This,
- DeleteOrMemberCallExpr E) override;
+ llvm::Value *
+ EmitVirtualDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl
*Dtor,
+ CXXDtorType DtorType, Address This,
+ DeleteOrMemberCallExpr E,
+ llvm::CallBase **CallOrInvoke) override;
void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF, GlobalDecl GD,
CallArgList &CallArgs) override {
@@ -901,7 +902,8 @@ void
MicrosoftCXXABI::emitVirtualObjectDelete(CodeGenFunction &CGF,
// CXXMemberCallExpr for dtor call.
bool UseGlobalDelete = DE->isGlobalDelete();
CXXDtorType DtorType = UseGlobalDelete ? Dtor_Complete : Dtor_Deleting;
- llvm::Value *MDThis = EmitVirtualDestructorCall(CGF, Dtor, DtorType, Ptr,
DE);
+ llvm::Value *MDThis = EmitVirtualDestructorCall(CGF, Dtor, DtorType, Ptr, DE,
+ /*CallOrInvoke=*/nullptr);
if (UseGlobalDelete)
CGF.EmitDeleteCall(DE->getOperatorDelete(), MDThis, ElementType);
}
@@ -1685,7 +1687,7 @@ void MicrosoftCXXABI::EmitDestructorCall(CodeGenFunction
&CGF,
CGF.EmitCXXDestructorCall(GD, Callee, CGF.getAsNaturalPointerTo(This,
ThisTy),
ThisTy,
/*ImplicitParam=*/Implicit,
- /*ImplicitParamTy=*/QualType(), nullptr);
+ /*ImplicitParamTy=*/QualType(), /*E=*/nullptr);
if (BaseDtorEndBB) {
// Complete object handler should continue to be the remaining
CGF.Builder.CreateBr(BaseDtorEndBB);
@@ -2001,7 +2003,7 @@ CGCallee
MicrosoftCXXABI::getVirtualFunctionPointer(CodeGenFunction &CGF,
llvm::Value *MicrosoftCXXABI::EmitVirtualDestructorCall(
CodeGenFunction &CGF, const CXXDestructorDecl *Dtor, CXXDtorType DtorType,
- Address This, DeleteOrMemberCallExpr E) {
+ Address This, DeleteOrMemberCallExpr E, llvm::CallBase **CallOrInvoke) {
auto *CE = E.dyn_cast<const CXXMemberCallExpr *>();
auto *D = E.dyn_cast<const CXXDeleteExpr *>();
assert((CE != nullptr) ^ (D != nullptr));
@@ -2031,7 +2033,7 @@ llvm::Value *MicrosoftCXXABI::EmitVirtualDestructorCall(
This = adjustThisArgumentForVirtualFunctionCall(CGF, GD, This, true);
RValue RV =
CGF.EmitCXXDestructorCall(GD, Callee, This.emitRawPointer(CGF), ThisTy,
- ImplicitParam, Context.IntTy, CE);
+ ImplicitParam, Context.IntTy, CE,
CallOrInvoke);
return RV.getScalarVal();
}
diff --git a/clang/lib/Sema/SemaCoroutine.cpp b/clang/lib/Sema/SemaCoroutine.cpp
index 81334c817b2a..726138577620 100644
--- a/clang/lib/Sema/SemaCoroutine.cpp
+++ b/clang/lib/Sema/SemaCoroutine.cpp
@@ -15,6 +15,7 @@
#include "CoroutineStmtBuilder.h"
#include "clang/AST/ASTLambda.h"
+#include "clang/AST/ComputeDependence.h"
#include "clang/AST/Decl.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
@@ -825,6 +826,32 @@ ExprResult Sema::BuildOperatorCoawaitLookupExpr(Scope *S,
SourceLocation Loc) {
return CoawaitOp;
}
+static bool isAttributedCoroInplaceTask(const QualType &QT) {
+ auto *Record = QT->getAsCXXRecordDecl();
+ return Record && Record->hasAttr<CoroInplaceTaskAttr>();
+}
+
+static bool isCoroInplaceCall(Expr *Operand) {
+ if (!Operand->isPRValue()) {
+ return false;
+ }
+
+ return isAttributedCoroInplaceTask(Operand->getType());
+}
+
+template <typename DesiredExpr>
+DesiredExpr *getExprWrappedByTemporary(Expr *E) {
+ if (auto *BTE = dyn_cast<CXXBindTemporaryExpr>(E)) {
+ E = BTE->getSubExpr();
+ }
+
+ if (auto *S = dyn_cast<DesiredExpr>(E)) {
+ return S;
+ }
+
+ return nullptr;
+}
+
// Attempts to resolve and build a CoawaitExpr from "raw" inputs, bailing out
to
// DependentCoawaitExpr if needed.
ExprResult Sema::BuildUnresolvedCoawaitExpr(SourceLocation Loc, Expr *Operand,
@@ -848,10 +875,31 @@ ExprResult
Sema::BuildUnresolvedCoawaitExpr(SourceLocation Loc, Expr *Operand,
}
auto *RD = Promise->getType()->getAsCXXRecordDecl();
+ bool InplaceCall =
+ isCoroInplaceCall(Operand) &&
+ isAttributedCoroInplaceTask(
+ getCurFunctionDecl(/*AllowLambda=*/true)->getReturnType());
+
+ OpaqueValueExpr *OpaqueCallExpr = nullptr;
+
auto *Transformed = Operand;
+
+ if (InplaceCall) {
+ if (auto *Temporary = dyn_cast<CXXBindTemporaryExpr>(Operand)) {
+ auto *SubExpr = Temporary->getSubExpr();
+ if (CallExpr *Call = dyn_cast<CallExpr>(SubExpr)) {
+ OpaqueCallExpr = new (Context)
+ OpaqueValueExpr(Call->getRParenLoc(), Call->getType(),
+ Call->getValueKind(), Call->getObjectKind(), Call);
+ Transformed = CXXBindTemporaryExpr::Create(
+ Context, Temporary->getTemporary(), OpaqueCallExpr);
+ }
+ }
+ }
+
if (lookupMember(*this, "await_transform", RD, Loc)) {
ExprResult R =
- buildPromiseCall(*this, Promise, Loc, "await_transform", Operand);
+ buildPromiseCall(*this, Promise, Loc, "await_transform", Transformed);
if (R.isInvalid()) {
Diag(Loc,
diag::note_coroutine_promise_implicit_await_transform_required_here)
@@ -864,7 +912,13 @@ ExprResult Sema::BuildUnresolvedCoawaitExpr(SourceLocation
Loc, Expr *Operand,
if (Awaiter.isInvalid())
return ExprError();
- return BuildResolvedCoawaitExpr(Loc, Operand, Awaiter.get());
+ auto Res = BuildResolvedCoawaitExpr(Loc, Operand, Awaiter.get());
+ if (!Res.isInvalid() && InplaceCall) {
+ // BuildResolvedCoawaitExpr must return a CoawaitExpr, if valid.
+ CoawaitExpr *CE = Res.getAs<CoawaitExpr>();
+ CE->setInplaceCallOpaqueValue(OpaqueCallExpr);
+ }
+ return Res;
}
ExprResult Sema::BuildResolvedCoawaitExpr(SourceLocation Loc, Expr *Operand,
diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp
b/clang/lib/Serialization/ASTReaderStmt.cpp
index e23ceffb10bf..4986360651a1 100644
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -483,7 +483,10 @@ void ASTStmtReader::VisitCoawaitExpr(CoawaitExpr *E) {
E->KeywordLoc = readSourceLocation();
for (auto &SubExpr: E->SubExprs)
SubExpr = Record.readSubStmt();
- E->OpaqueValue = cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
+ E->CommonExprOpaqueValue =
+ cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
+ E->InplaceCallOpaqueValue =
+ cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
E->setIsImplicit(Record.readInt() != 0);
}
@@ -492,7 +495,10 @@ void ASTStmtReader::VisitCoyieldExpr(CoyieldExpr *E) {
E->KeywordLoc = readSourceLocation();
for (auto &SubExpr: E->SubExprs)
SubExpr = Record.readSubStmt();
- E->OpaqueValue = cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
+ E->CommonExprOpaqueValue =
+ cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
+ E->InplaceCallOpaqueValue =
+ cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
}
void ASTStmtReader::VisitDependentCoawaitExpr(DependentCoawaitExpr *E) {
diff --git a/clang/lib/Serialization/ASTWriterStmt.cpp
b/clang/lib/Serialization/ASTWriterStmt.cpp
index ea499019c9d1..57084125a851 100644
--- a/clang/lib/Serialization/ASTWriterStmt.cpp
+++ b/clang/lib/Serialization/ASTWriterStmt.cpp
@@ -444,7 +444,8 @@ void
ASTStmtWriter::VisitCoroutineSuspendExpr(CoroutineSuspendExpr *E) {
Record.AddSourceLocation(E->getKeywordLoc());
for (Stmt *S : E->children())
Record.AddStmt(S);
- Record.AddStmt(E->getOpaqueValue());
+ Record.AddStmt(E->getCommonExprOpaqueValue());
+ Record.AddStmt(E->getInplaceCallOpaqueValue());
}
void ASTStmtWriter::VisitCoawaitExpr(CoawaitExpr *E) {
diff --git a/clang/test/CodeGenCoroutines/Inputs/utility.h
b/clang/test/CodeGenCoroutines/Inputs/utility.h
new file mode 100644
index 000000000000..43c6d27823bd
--- /dev/null
+++ b/clang/test/CodeGenCoroutines/Inputs/utility.h
@@ -0,0 +1,13 @@
+// This is a mock file for <utility>
+
+namespace std {
+
+template <typename T> struct remove_reference { using type = T; };
+template <typename T> struct remove_reference<T &> { using type = T; };
+template <typename T> struct remove_reference<T &&> { using type = T; };
+
+template <typename T>
+constexpr typename std::remove_reference<T>::type&& move(T &&t) noexcept {
+ return static_cast<typename std::remove_reference<T>::type &&>(t);
+}
+}
diff --git a/clang/test/CodeGenCoroutines/coro-structured-concurrency.cpp
b/clang/test/CodeGenCoroutines/coro-structured-concurrency.cpp
new file mode 100644
index 000000000000..2569643221da
--- /dev/null
+++ b/clang/test/CodeGenCoroutines/coro-structured-concurrency.cpp
@@ -0,0 +1,84 @@
+// This file tests the coro_structured_concurrency attribute semantics.
+// RUN: %clang_cc1 -std=c++20 -disable-llvm-passes -emit-llvm %s -o - |
FileCheck %s
+
+#include "Inputs/coroutine.h"
+#include "Inputs/utility.h"
+
+template <typename T>
+struct [[clang::coro_inplace_task]] Task {
+ struct promise_type {
+ struct FinalAwaiter {
+ bool await_ready() const noexcept { return false; }
+
+ template <typename P>
+ std::coroutine_handle<> await_suspend(std::coroutine_handle<P> coro)
noexcept {
+ if (!coro)
+ return std::noop_coroutine();
+ return coro.promise().continuation;
+ }
+ void await_resume() noexcept {}
+ };
+
+ Task get_return_object() noexcept {
+ return std::coroutine_handle<promise_type>::from_promise(*this);
+ }
+
+ std::suspend_always initial_suspend() noexcept { return {}; }
+ FinalAwaiter final_suspend() noexcept { return {}; }
+ void unhandled_exception() noexcept {}
+ void return_value(T x) noexcept {
+ value = x;
+ }
+
+ std::coroutine_handle<> continuation;
+ T value;
+ };
+
+ Task(std::coroutine_handle<promise_type> handle) : handle(handle) {}
+ ~Task() {
+ if (handle)
+ handle.destroy();
+ }
+
+ struct Awaiter {
+ Awaiter(Task *t) : task(t) {}
+ bool await_ready() const noexcept { return false; }
+ void await_suspend(std::coroutine_handle<void> continuation) noexcept {}
+ T await_resume() noexcept {
+ return task->handle.promise().value;
+ }
+
+ Task *task;
+ };
+
+ auto operator co_await() {
+ return Awaiter{this};
+ }
+
+private:
+ std::coroutine_handle<promise_type> handle;
+};
+
+// CHECK-LABEL: define{{.*}} @_Z6calleev
+Task<int> callee() {
+ co_return 1;
+}
+
+// CHECK-LABEL: define{{.*}} @_Z8elidablev
+Task<int> elidable() {
+ // CHECK: %[[TARK_OBJ:.+]] = alloca %struct.Task
+ // CHECK: call void @llvm.coro.safe.elide(ptr %[[TARK_OBJ:.+]])
+ co_return co_await callee();
+}
+
+// CHECK-LABEL: define{{.*}} @_Z11nonelidablev
+Task<int> nonelidable() {
+ // CHECK: %[[TARK_OBJ:.+]] = alloca %struct.Task
+ auto t = callee();
+ // Because we aren't co_awaiting a prvalue, we cannot elide here.
+ // CHECK-NOT: call void @llvm.coro.safe.elide(ptr %[[TARK_OBJ:.+]])
+ co_await t;
+ co_await std::move(t);
+
+ co_return 1;
+}
diff --git a/clang/test/Misc/pragma-attribute-supported-attributes-list.test
b/clang/test/Misc/pragma-attribute-supported-attributes-list.test
index 28df04c5e33e..c9c14a29843f 100644
--- a/clang/test/Misc/pragma-attribute-supported-attributes-list.test
+++ b/clang/test/Misc/pragma-attribute-supported-attributes-list.test
@@ -59,6 +59,7 @@
// CHECK-NEXT: ConsumableSetOnRead (SubjectMatchRule_record)
// CHECK-NEXT: Convergent (SubjectMatchRule_function)
// CHECK-NEXT: CoroDisableLifetimeBound (SubjectMatchRule_function)
+// CHECK-NEXT: CoroInplaceTask (SubjectMatchRule_record)
// CHECK-NEXT: CoroLifetimeBound (SubjectMatchRule_record)
// CHECK-NEXT: CoroOnlyDestroyWhenComplete (SubjectMatchRule_record)
// CHECK-NEXT: CoroReturnType (SubjectMatchRule_record)
diff --git a/llvm/include/llvm/IR/Intrinsics.td
b/llvm/include/llvm/IR/Intrinsics.td
index 01e379dfcebc..09cdf5e4fd7e 100644
--- a/llvm/include/llvm/IR/Intrinsics.td
+++ b/llvm/include/llvm/IR/Intrinsics.td
@@ -1758,6 +1758,9 @@ def int_coro_subfn_addr : DefaultAttrsIntrinsic<
[IntrReadMem, IntrArgMemOnly, ReadOnly<ArgIndex<0>>,
NoCapture<ArgIndex<0>>]>;
+def int_coro_safe_elide : DefaultAttrsIntrinsic<
+ [], [llvm_ptr_ty], []>;
+
///===-------------------------- Other Intrinsics
--------------------------===//
//
// TODO: We should introduce a new memory kind fo traps (and other side effects
diff --git a/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
b/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
index dd92b3593af9..35455ea87ae1 100644
--- a/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
+++ b/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
@@ -11,6 +11,7 @@
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/InstIterator.h"
+#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/PassManager.h"
#include "llvm/Transforms/Scalar/SimplifyCFG.h"
@@ -81,7 +82,7 @@ bool Lowerer::lower(Function &F) {
} else
continue;
break;
- case Intrinsic::coro_async_size_replace:
+ case Intrinsic::coro_async_size_replace: {
auto *Target = cast<ConstantStruct>(
cast<GlobalVariable>(II->getArgOperand(0)->stripPointerCasts())
->getInitializer());
@@ -99,6 +100,9 @@ bool Lowerer::lower(Function &F) {
Target->replaceAllUsesWith(NewFuncPtrStruct);
break;
}
+ case Intrinsic::coro_safe_elide:
+ break;
+ }
II->eraseFromParent();
Changed = true;
}
@@ -112,7 +116,8 @@ static bool declaresCoroCleanupIntrinsics(const Module &M) {
M, {"llvm.coro.alloc", "llvm.coro.begin", "llvm.coro.subfn.addr",
"llvm.coro.free", "llvm.coro.id", "llvm.coro.id.retcon",
"llvm.coro.id.async", "llvm.coro.id.retcon.once",
- "llvm.coro.async.size.replace", "llvm.coro.async.resume"});
+ "llvm.coro.async.size.replace", "llvm.coro.async.resume",
+ "llvm.coro.safe.elide"});
}
PreservedAnalyses CoroCleanupPass::run(Module &M,
diff --git a/llvm/lib/Transforms/Coroutines/CoroElide.cpp
b/llvm/lib/Transforms/Coroutines/CoroElide.cpp
index 598ef7779d77..20e4fb176a19 100644
--- a/llvm/lib/Transforms/Coroutines/CoroElide.cpp
+++ b/llvm/lib/Transforms/Coroutines/CoroElide.cpp
@@ -7,12 +7,14 @@
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Coroutines/CoroElide.h"
+#include "CoroInstr.h"
#include "CoroInternal.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
+#include "llvm/Analysis/PostDominators.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/Support/ErrorHandling.h"
@@ -56,7 +58,8 @@ class FunctionElideInfo {
class CoroIdElider {
public:
CoroIdElider(CoroIdInst *CoroId, FunctionElideInfo &FEI, AAResults &AA,
- DominatorTree &DT, OptimizationRemarkEmitter &ORE);
+ DominatorTree &DT, PostDominatorTree &PDT,
+ OptimizationRemarkEmitter &ORE);
void elideHeapAllocations(uint64_t FrameSize, Align FrameAlign);
bool lifetimeEligibleForElide() const;
bool attemptElide();
@@ -68,6 +71,7 @@ class CoroIdElider {
FunctionElideInfo &FEI;
AAResults &AA;
DominatorTree &DT;
+ PostDominatorTree &PDT;
OptimizationRemarkEmitter &ORE;
SmallVector<CoroBeginInst *, 1> CoroBegins;
@@ -183,8 +187,9 @@ void FunctionElideInfo::collectPostSplitCoroIds() {
CoroIdElider::CoroIdElider(CoroIdInst *CoroId, FunctionElideInfo &FEI,
AAResults &AA, DominatorTree &DT,
+ PostDominatorTree &PDT,
OptimizationRemarkEmitter &ORE)
- : CoroId(CoroId), FEI(FEI), AA(AA), DT(DT), ORE(ORE) {
+ : CoroId(CoroId), FEI(FEI), AA(AA), DT(DT), PDT(PDT), ORE(ORE) {
// Collect all coro.begin and coro.allocs associated with this coro.id.
for (User *U : CoroId->users()) {
if (auto *CB = dyn_cast<CoroBeginInst>(U))
@@ -336,6 +341,41 @@ bool CoroIdElider::canCoroBeginEscape(
return false;
}
+// FIXME: This is not accounting for the stores to tasks whose handle is not
+// zero offset.
+static const StoreInst *getPostDominatingStoreToTask(const CoroBeginInst *CB,
+ PostDominatorTree &PDT) {
+ const StoreInst *OnlyStore = nullptr;
+
+ for (auto *U : CB->users()) {
+ auto *Store = dyn_cast<StoreInst>(U);
+ if (Store && Store->getValueOperand() == CB) {
+ if (OnlyStore) {
+ // Store must be unique. one coro begin getting stored to multiple
+ // stores is not accepted.
+ return nullptr;
+ }
+ OnlyStore = Store;
+ }
+ }
+
+ if (!OnlyStore || !PDT.dominates(OnlyStore, CB)) {
+ return nullptr;
+ }
+
+ return OnlyStore;
+}
+
+static bool isMarkedSafeElide(const llvm::Value *V) {
+ for (auto *U : V->users()) {
+ auto *II = dyn_cast<IntrinsicInst>(U);
+ if (II && (II->getIntrinsicID() == Intrinsic::coro_safe_elide)) {
+ return true;
+ }
+ }
+ return false;
+}
+
bool CoroIdElider::lifetimeEligibleForElide() const {
// If no CoroAllocs, we cannot suppress allocation, so elision is not
// possible.
@@ -364,6 +404,17 @@ bool CoroIdElider::lifetimeEligibleForElide() const {
// Filter out the coro.destroy that lie along exceptional paths.
for (const auto *CB : CoroBegins) {
+ // This might be too strong of a condition but should be very safe.
+ // If the CB is unconditionally stored into a "Task Like Object",
+ // and such object is "safe elide".
+ if (FEI.ContainingFunction->isPresplitCoroutine()) {
+ if (auto *MaybeStoreToTask = getPostDominatingStoreToTask(CB, PDT)) {
+ auto Dest = MaybeStoreToTask->getPointerOperand();
+ if (isMarkedSafeElide(Dest))
+ continue;
+ }
+ }
+
auto It = DestroyAddr.find(CB);
// FIXME: If we have not found any destroys for this coro.begin, we
@@ -476,11 +527,12 @@ PreservedAnalyses CoroElidePass::run(Function &F,
FunctionAnalysisManager &AM) {
AAResults &AA = AM.getResult<AAManager>(F);
DominatorTree &DT = AM.getResult<DominatorTreeAnalysis>(F);
+ PostDominatorTree &PDT = AM.getResult<PostDominatorTreeAnalysis>(F);
auto &ORE = AM.getResult<OptimizationRemarkEmitterAnalysis>(F);
bool Changed = false;
for (auto *CII : FEI.getCoroIds()) {
- CoroIdElider CIE(CII, FEI, AA, DT, ORE);
+ CoroIdElider CIE(CII, FEI, AA, DT, PDT, ORE);
Changed |= CIE.attemptElide();
}
diff --git a/llvm/lib/Transforms/Coroutines/Coroutines.cpp
b/llvm/lib/Transforms/Coroutines/Coroutines.cpp
index 1a92bc163625..48c02e5406b7 100644
--- a/llvm/lib/Transforms/Coroutines/Coroutines.cpp
+++ b/llvm/lib/Transforms/Coroutines/Coroutines.cpp
@@ -86,6 +86,7 @@ static const char *const CoroIntrinsics[] = {
"llvm.coro.prepare.retcon",
"llvm.coro.promise",
"llvm.coro.resume",
+ "llvm.coro.safe.elide",
"llvm.coro.save",
"llvm.coro.size",
"llvm.coro.subfn.addr",
diff --git
a/llvm/test/Transforms/Coroutines/coro-elide-structured-concurrency.ll
b/llvm/test/Transforms/Coroutines/coro-elide-structured-concurrency.ll
new file mode 100644
index 000000000000..b19886d549d9
--- /dev/null
+++ b/llvm/test/Transforms/Coroutines/coro-elide-structured-concurrency.ll
@@ -0,0 +1,64 @@
+; Testing elide performed its job for calls to coroutines marked safe.
+; RUN: opt < %s -S -passes='inline,coro-elide' | FileCheck %s
+
+%struct.Task = type { ptr }
+
+declare void @print(i32) nounwind
+
+; resume part of the coroutine
+define fastcc void @callee.resume(ptr dereferenceable(1)) {
+ tail call void @print(i32 0)
+ ret void
+}
+
+; destroy part of the coroutine
+define fastcc void @callee.destroy(ptr) {
+ tail call void @print(i32 1)
+ ret void
+}
+
+; cleanup part of the coroutine
+define fastcc void @callee.cleanup(ptr) {
+ tail call void @print(i32 2)
+ ret void
+}
+
+@callee.resumers = internal constant [3 x ptr] [
+ ptr @callee.resume, ptr @callee.destroy, ptr @callee.cleanup]
+
+declare void @alloc(i1) nounwind
+
+; CHECK: define ptr @callee()
+define ptr @callee() {
+entry:
+ %task = alloca %struct.Task, align 8
+ %id = call token @llvm.coro.id(i32 0, ptr null,
+ ptr @callee,
+ ptr @callee.resumers)
+ %alloc = call i1 @llvm.coro.alloc(token %id)
+ %hdl = call ptr @llvm.coro.begin(token %id, ptr null)
+ store ptr %hdl, ptr %task
+ ret ptr %task
+}
+
+; CHECK: define ptr @caller()
+; Function Attrs: presplitcoroutine
+define ptr @caller() #0 {
+entry:
+ %task = call ptr @callee()
+
+ ; CHECK: %[[id:.+]] = call token @llvm.coro.id(i32 0, ptr null, ptr @callee,
ptr @callee.resumers)
+ ; CHECK-NOT: call i1 @llvm.coro.alloc(token %[[id]])
+ call void @llvm.coro.safe.elide(ptr %task)
+
+ ret ptr %task
+}
+
+attributes #0 = { presplitcoroutine }
+
+declare token @llvm.coro.id(i32, ptr, ptr, ptr)
+declare ptr @llvm.coro.begin(token, ptr)
+declare ptr @llvm.coro.frame()
+declare ptr @llvm.coro.subfn.addr(ptr, i8)
+declare i1 @llvm.coro.alloc(token)
+declare void @llvm.coro.safe.elide(ptr)
>From 1543f3ed1b3c6b1ad5a00f3e6b6eb251ef7b4d83 Mon Sep 17 00:00:00 2001
From: Yuxuan Chen <y...@meta.com>
Date: Tue, 9 Jul 2024 17:12:09 -0700
Subject: [PATCH 2/3] Implement noalloc copy
---
clang/lib/CodeGen/CGCoroutine.cpp | 7 +-
llvm/lib/Transforms/Coroutines/CoroElide.cpp | 12 +-
llvm/lib/Transforms/Coroutines/CoroInternal.h | 4 +
llvm/lib/Transforms/Coroutines/CoroSplit.cpp | 105 ++++++++++++++----
llvm/lib/Transforms/Coroutines/Coroutines.cpp | 27 +++++
5 files changed, 119 insertions(+), 36 deletions(-)
diff --git a/clang/lib/CodeGen/CGCoroutine.cpp
b/clang/lib/CodeGen/CGCoroutine.cpp
index 656c1e905317..7ad1470b52f4 100644
--- a/clang/lib/CodeGen/CGCoroutine.cpp
+++ b/clang/lib/CodeGen/CGCoroutine.cpp
@@ -232,8 +232,11 @@ static LValueOrRValue
emitSuspendExpression(CodeGenFunction &CGF, CGCoroData &Co
std::optional<CodeGenFunction::OpaqueValueMapping> OperandMapping;
if (auto *CallOV = S.getInplaceCallOpaqueValue()) {
auto *CE = cast<CallExpr>(CallOV->getSourceExpr());
- // TODO: don't use the intrisic coro_safe_elide in the next version.
- LValue CallResult = CGF.EmitCallExprLValue(CE, nullptr);
+ llvm::CallBase *CallOrInvoke = nullptr;
+ LValue CallResult = CGF.EmitCallExprLValue(CE, &CallOrInvoke);
+ if (CallOrInvoke)
+ CallOrInvoke->addAnnotationMetadata("coro_must_elide");
+
OperandMapping.emplace(CGF, CallOV, CallResult);
llvm::Value *Value = CallResult.getPointer(CGF);
auto SafeElide = CGF.CGM.getIntrinsic(llvm::Intrinsic::coro_safe_elide);
diff --git a/llvm/lib/Transforms/Coroutines/CoroElide.cpp
b/llvm/lib/Transforms/Coroutines/CoroElide.cpp
index 20e4fb176a19..467cdf491e5d 100644
--- a/llvm/lib/Transforms/Coroutines/CoroElide.cpp
+++ b/llvm/lib/Transforms/Coroutines/CoroElide.cpp
@@ -225,17 +225,7 @@ void CoroIdElider::elideHeapAllocations(uint64_t
FrameSize, Align FrameAlign) {
BasicBlock::iterator InsertPt =
getFirstNonAllocaInTheEntryBlock(FEI.ContainingFunction)->getIterator();
- // Replacing llvm.coro.alloc with false will suppress dynamic
- // allocation as it is expected for the frontend to generate the code that
- // looks like:
- // id = coro.id(...)
- // mem = coro.alloc(id) ? malloc(coro.size()) : 0;
- // coro.begin(id, mem)
- auto *False = ConstantInt::getFalse(C);
- for (auto *CA : CoroAllocs) {
- CA->replaceAllUsesWith(False);
- CA->eraseFromParent();
- }
+ coro::suppressCoroAllocs(C, CoroAllocs);
// FIXME: Design how to transmit alignment information for every alloca that
// is spilled into the coroutine frame and recreate the alignment information
diff --git a/llvm/lib/Transforms/Coroutines/CoroInternal.h
b/llvm/lib/Transforms/Coroutines/CoroInternal.h
index 5716fd0ea4ab..d91cccd99a70 100644
--- a/llvm/lib/Transforms/Coroutines/CoroInternal.h
+++ b/llvm/lib/Transforms/Coroutines/CoroInternal.h
@@ -26,6 +26,10 @@ bool declaresIntrinsics(const Module &M,
const std::initializer_list<StringRef>);
void replaceCoroFree(CoroIdInst *CoroId, bool Elide);
+void suppressCoroAllocs(CoroIdInst *CoroId);
+void suppressCoroAllocs(LLVMContext &Context,
+ ArrayRef<CoroAllocInst *> CoroAllocs);
+
/// Attempts to rewrite the location operand of debug intrinsics in terms of
/// the coroutine frame pointer, folding pointer offsets into the DIExpression
/// of the intrinsic.
diff --git a/llvm/lib/Transforms/Coroutines/CoroSplit.cpp
b/llvm/lib/Transforms/Coroutines/CoroSplit.cpp
index 0b52d1e4490c..5b994573336f 100644
--- a/llvm/lib/Transforms/Coroutines/CoroSplit.cpp
+++ b/llvm/lib/Transforms/Coroutines/CoroSplit.cpp
@@ -25,6 +25,7 @@
#include "llvm/ADT/PriorityWorklist.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Analysis/CFG.h"
@@ -1179,6 +1180,14 @@ static void
updateAsyncFuncPointerContextSize(coro::Shape &Shape) {
Shape.AsyncLowering.AsyncFuncPointer->setInitializer(NewFuncPtrStruct);
}
+static TypeSize getFrameSizeForShape(coro::Shape &Shape) {
+ // In the same function all coro.sizes should have the same result type.
+ auto *SizeIntrin = Shape.CoroSizes.back();
+ Module *M = SizeIntrin->getModule();
+ const DataLayout &DL = M->getDataLayout();
+ return DL.getTypeAllocSize(Shape.FrameTy);
+}
+
static void replaceFrameSizeAndAlignment(coro::Shape &Shape) {
if (Shape.ABI == coro::ABI::Async)
updateAsyncFuncPointerContextSize(Shape);
@@ -1194,10 +1203,8 @@ static void replaceFrameSizeAndAlignment(coro::Shape
&Shape) {
// In the same function all coro.sizes should have the same result type.
auto *SizeIntrin = Shape.CoroSizes.back();
- Module *M = SizeIntrin->getModule();
- const DataLayout &DL = M->getDataLayout();
- auto Size = DL.getTypeAllocSize(Shape.FrameTy);
- auto *SizeConstant = ConstantInt::get(SizeIntrin->getType(), Size);
+ auto *SizeConstant =
+ ConstantInt::get(SizeIntrin->getType(), getFrameSizeForShape(Shape));
for (CoroSizeInst *CS : Shape.CoroSizes) {
CS->replaceAllUsesWith(SizeConstant);
@@ -1248,6 +1255,7 @@ static void handleNoSuspendCoroutine(coro::Shape &Shape) {
}
CoroBegin->eraseFromParent();
+ Shape.CoroBegin = nullptr;
}
// SimplifySuspendPoint needs to check that there is no calls between
@@ -1970,9 +1978,17 @@ splitCoroutine(Function &F, SmallVectorImpl<Function *>
&Clones,
}
/// Remove calls to llvm.coro.end in the original function.
-static void removeCoroEnds(const coro::Shape &Shape) {
- for (auto *End : Shape.CoroEnds) {
- replaceCoroEnd(End, Shape, Shape.FramePtr, /*in resume*/ false, nullptr);
+static void removeCoroEndsFromRampFunction(const coro::Shape &Shape) {
+ if (Shape.ABI != coro::ABI::Switch) {
+ for (auto *End : Shape.CoroEnds) {
+ replaceCoroEnd(End, Shape, Shape.FramePtr, /*in resume*/ false, nullptr);
+ }
+ } else {
+ for (llvm::AnyCoroEndInst *End : Shape.CoroEnds) {
+ auto &Context = End->getContext();
+ End->replaceAllUsesWith(ConstantInt::getFalse(Context));
+ End->eraseFromParent();
+ }
}
}
@@ -1981,18 +1997,6 @@ static void updateCallGraphAfterCoroutineSplit(
const SmallVectorImpl<Function *> &Clones, LazyCallGraph::SCC &C,
LazyCallGraph &CG, CGSCCAnalysisManager &AM, CGSCCUpdateResult &UR,
FunctionAnalysisManager &FAM) {
- if (!Shape.CoroBegin)
- return;
-
- if (Shape.ABI != coro::ABI::Switch)
- removeCoroEnds(Shape);
- else {
- for (llvm::AnyCoroEndInst *End : Shape.CoroEnds) {
- auto &Context = End->getContext();
- End->replaceAllUsesWith(ConstantInt::getFalse(Context));
- End->eraseFromParent();
- }
- }
if (!Clones.empty()) {
switch (Shape.ABI) {
@@ -2080,6 +2084,45 @@ static void addPrepareFunction(const Module &M,
Fns.push_back(PrepareFn);
}
+static Function *createNoAllocVariant(Function &F, ValueToValueMapTy &VMap,
+ coro::Shape &Shape) {
+ auto *OrigFnTy = F.getFunctionType();
+ auto OldParams = OrigFnTy->params();
+
+ SmallVector<Type *> NewParams;
+ NewParams.reserve(OldParams.size() + 1);
+ NewParams.push_back(PointerType::getUnqual(Shape.FrameTy));
+ for (Type *T : OldParams) {
+ NewParams.push_back(T);
+ }
+ auto *NewFnTy = FunctionType::get(OrigFnTy->getReturnType(), NewParams,
+ OrigFnTy->isVarArg());
+ Function *NoAllocF =
+ Function::Create(NewFnTy, F.getLinkage(), F.getName() + ".noalloc");
+ unsigned int Idx = 1;
+ for (const auto &I : F.args()) {
+ VMap[&I] = NoAllocF->getArg(Idx++);
+ }
+ SmallVector<ReturnInst *, 4> Returns;
+ CloneFunctionInto(NoAllocF, &F, VMap,
+ CloneFunctionChangeType::LocalChangesOnly, Returns);
+
+ if (Shape.CoroBegin) {
+ auto *NewCoroBegin = cast_if_present<CoroBeginInst>(VMap[Shape.CoroBegin]);
+ auto *NewCoroId = cast<CoroIdInst>(NewCoroBegin->getId());
+ coro::replaceCoroFree(NewCoroId, /*Elide=*/true);
+ coro::suppressCoroAllocs(NewCoroId);
+ NewCoroBegin->replaceAllUsesWith(NoAllocF->getArg(0));
+ NewCoroBegin->eraseFromParent();
+ }
+
+ Module *M = F.getParent();
+ M->getFunctionList().insert(M->end(), NoAllocF);
+
+ removeUnreachableBlocks(*NoAllocF);
+ return NoAllocF;
+}
+
CoroSplitPass::CoroSplitPass(bool OptimizeFrame)
: MaterializableCallback(coro::defaultMaterializable),
OptimizeFrame(OptimizeFrame) {}
@@ -2111,15 +2154,19 @@ PreservedAnalyses CoroSplitPass::run(LazyCallGraph::SCC
&C,
// Split all the coroutines.
for (LazyCallGraph::Node *N : Coroutines) {
Function &F = N->getFunction();
+
+
LLVM_DEBUG(dbgs() << "CoroSplit: Processing coroutine '" << F.getName()
<< "\n");
F.setSplittedCoroutine();
SmallVector<Function *, 4> Clones;
auto &ORE = FAM.getResult<OptimizationRemarkEmitterAnalysis>(F);
- const coro::Shape Shape =
+ coro::Shape Shape =
splitCoroutine(F, Clones, FAM.getResult<TargetIRAnalysis>(F),
OptimizeFrame, MaterializableCallback);
+
+ removeCoroEndsFromRampFunction(Shape);
updateCallGraphAfterCoroutineSplit(*N, Shape, Clones, C, CG, AM, UR, FAM);
ORE.emit([&]() {
@@ -2135,11 +2182,23 @@ PreservedAnalyses CoroSplitPass::run(LazyCallGraph::SCC
&C,
for (Function *Clone : Clones)
UR.CWorklist.insert(CG.lookupSCC(CG.get(*Clone)));
}
- }
- for (auto *PrepareFn : PrepareFns) {
- replaceAllPrepares(PrepareFn, CG, C);
+ if (Shape.ABI == coro::ABI::Switch) {
+ ValueToValueMapTy VMap;
+ auto *NoAllocF = createNoAllocVariant(F, VMap, Shape);
+ NoAllocF->addFnAttr("elided-coro");
+ auto NewAttrs = NoAllocF->getAttributes();
+
+ addFramePointerAttrs(NewAttrs, NoAllocF->getContext(), 0,
Shape.FrameSize,
+ Shape.FrameAlign, /*NoAlias=*/false);
+
+ NoAllocF->setAttributes(NewAttrs);
}
+ }
+
+ for (auto *PrepareFn : PrepareFns) {
+ replaceAllPrepares(PrepareFn, CG, C);
+ }
return PreservedAnalyses::none();
}
diff --git a/llvm/lib/Transforms/Coroutines/Coroutines.cpp
b/llvm/lib/Transforms/Coroutines/Coroutines.cpp
index 48c02e5406b7..36869316a35a 100644
--- a/llvm/lib/Transforms/Coroutines/Coroutines.cpp
+++ b/llvm/lib/Transforms/Coroutines/Coroutines.cpp
@@ -146,6 +146,33 @@ void coro::replaceCoroFree(CoroIdInst *CoroId, bool Elide)
{
}
}
+void coro::suppressCoroAllocs(CoroIdInst *CoroId) {
+ SmallVector<CoroAllocInst *, 4> CoroAllocs;
+ for (User *U : CoroId->users())
+ if (auto *CA = dyn_cast<CoroAllocInst>(U))
+ CoroAllocs.push_back(CA);
+
+ if (CoroAllocs.empty())
+ return;
+
+ coro::suppressCoroAllocs(CoroId->getContext(), CoroAllocs);
+}
+
+// Replacing llvm.coro.alloc with false will suppress dynamic
+// allocation as it is expected for the frontend to generate the code that
+// looks like:
+// id = coro.id(...)
+// mem = coro.alloc(id) ? malloc(coro.size()) : 0;
+// coro.begin(id, mem)
+void coro::suppressCoroAllocs(LLVMContext &Context,
+ ArrayRef<CoroAllocInst *> CoroAllocs) {
+ auto *False = ConstantInt::getFalse(Context);
+ for (auto *CA : CoroAllocs) {
+ CA->replaceAllUsesWith(False);
+ CA->eraseFromParent();
+ }
+}
+
static void clear(coro::Shape &Shape) {
Shape.CoroBegin = nullptr;
Shape.CoroEnds.clear();
>From d2af7a470774f20df0ec54380e4af7f3584956cf Mon Sep 17 00:00:00 2001
From: Yuxuan Chen <y...@meta.com>
Date: Thu, 11 Jul 2024 19:02:25 -0700
Subject: [PATCH 3/3] add CoroAnnotationElidePass
---
llvm/include/llvm/IR/Instruction.h | 4 +
.../Coroutines/CoroAnnotationElide.h | 34 ++++++
llvm/lib/IR/Metadata.cpp | 16 +++
llvm/lib/Passes/PassBuilder.cpp | 1 +
llvm/lib/Passes/PassBuilderPipelines.cpp | 3 +-
llvm/lib/Passes/PassRegistry.def | 1 +
llvm/lib/Transforms/Coroutines/CMakeLists.txt | 1 +
.../Coroutines/CoroAnnotationElide.cpp | 108 ++++++++++++++++++
8 files changed, 167 insertions(+), 1 deletion(-)
create mode 100644
llvm/include/llvm/Transforms/Coroutines/CoroAnnotationElide.h
create mode 100644 llvm/lib/Transforms/Coroutines/CoroAnnotationElide.cpp
diff --git a/llvm/include/llvm/IR/Instruction.h
b/llvm/include/llvm/IR/Instruction.h
index 7a9b95f23465..8d22d4cbf8ad 100644
--- a/llvm/include/llvm/IR/Instruction.h
+++ b/llvm/include/llvm/IR/Instruction.h
@@ -455,6 +455,10 @@ class Instruction : public User,
/// !annotation metadata, append the tuple to
/// the existing node.
void addAnnotationMetadata(SmallVector<StringRef> Annotations);
+
+ /// Returns true if an !annotation metadata is set to this instruction.
+ bool hasAnnotationMetadata(StringRef Name) const;
+
/// Returns the AA metadata for this instruction.
AAMDNodes getAAMetadata() const;
diff --git a/llvm/include/llvm/Transforms/Coroutines/CoroAnnotationElide.h
b/llvm/include/llvm/Transforms/Coroutines/CoroAnnotationElide.h
new file mode 100644
index 000000000000..dae1cc0c689a
--- /dev/null
+++ b/llvm/include/llvm/Transforms/Coroutines/CoroAnnotationElide.h
@@ -0,0 +1,34 @@
+//===- CoroAnnotationElide.h - Optimizing a coro_must_elide call
----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// \file
+// This pass transforms all Call or Invoke instructions that are annotated
+// "coro_must_elide" to call the `.noalloc` variant of coroutine instead.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_COROUTINES_COROANNOTATIONELIDE_H
+#define LLVM_TRANSFORMS_COROUTINES_COROANNOTATIONELIDE_H
+
+#include "llvm/Analysis/CGSCCPassManager.h"
+#include "llvm/Analysis/LazyCallGraph.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+struct CoroAnnotationElidePass : PassInfoMixin<CoroAnnotationElidePass> {
+ CoroAnnotationElidePass() {}
+
+ PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
+ LazyCallGraph &CG, CGSCCUpdateResult &UR);
+
+ static bool isRequired() { return false; }
+};
+} // end namespace llvm
+
+#endif // LLVM_TRANSFORMS_COROUTINES_COROANNOTATIONELIDE_H
diff --git a/llvm/lib/IR/Metadata.cpp b/llvm/lib/IR/Metadata.cpp
index 5f42ce22f72f..ba2b7850c364 100644
--- a/llvm/lib/IR/Metadata.cpp
+++ b/llvm/lib/IR/Metadata.cpp
@@ -1703,6 +1703,22 @@ void Instruction::addAnnotationMetadata(StringRef Name) {
setMetadata(LLVMContext::MD_annotation, MD);
}
+bool Instruction::hasAnnotationMetadata(StringRef Name) const {
+ auto *Metadata = getMetadata(LLVMContext::MD_annotation);
+ if (!Metadata)
+ return false;
+
+ auto *Tuple = cast<MDTuple>(Metadata);
+ for (auto &N : Tuple->operands()) {
+ if (auto *S = dyn_cast<MDString>(N.get())) {
+ if (S->getString() == Name) {
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
AAMDNodes Instruction::getAAMetadata() const {
AAMDNodes Result;
// Not using Instruction::hasMetadata() because we're not interested in
diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
index 219e8b75450e..2b2ace1330fc 100644
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -130,6 +130,7 @@
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/AggressiveInstCombine/AggressiveInstCombine.h"
#include "llvm/Transforms/CFGuard.h"
+#include "llvm/Transforms/Coroutines/CoroAnnotationElide.h"
#include "llvm/Transforms/Coroutines/CoroCleanup.h"
#include "llvm/Transforms/Coroutines/CoroConditionalWrapper.h"
#include "llvm/Transforms/Coroutines/CoroEarly.h"
diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp
b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 4fd5ee1946bb..2d5a6e6861f2 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -32,6 +32,7 @@
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/AggressiveInstCombine/AggressiveInstCombine.h"
+#include "llvm/Transforms/Coroutines/CoroAnnotationElide.h"
#include "llvm/Transforms/Coroutines/CoroCleanup.h"
#include "llvm/Transforms/Coroutines/CoroConditionalWrapper.h"
#include "llvm/Transforms/Coroutines/CoroEarly.h"
@@ -968,8 +969,8 @@ PassBuilder::buildInlinerPipeline(OptimizationLevel Level,
// it's been modified since.
MainCGPipeline.addPass(createCGSCCToFunctionPassAdaptor(
RequireAnalysisPass<ShouldNotRunFunctionPassesAnalysis, Function>()));
-
MainCGPipeline.addPass(CoroSplitPass(Level != OptimizationLevel::O0));
+ MainCGPipeline.addPass(CoroAnnotationElidePass());
// Make sure we don't affect potential future NoRerun CGSCC adaptors.
MIWP.addLateModulePass(createModuleToFunctionPassAdaptor(
diff --git a/llvm/lib/Passes/PassRegistry.def b/llvm/lib/Passes/PassRegistry.def
index 3b92823cd283..f3d77f8def4a 100644
--- a/llvm/lib/Passes/PassRegistry.def
+++ b/llvm/lib/Passes/PassRegistry.def
@@ -234,6 +234,7 @@ CGSCC_PASS("attributor-light-cgscc",
AttributorLightCGSCCPass())
CGSCC_PASS("invalidate<all>", InvalidateAllAnalysesPass())
CGSCC_PASS("no-op-cgscc", NoOpCGSCCPass())
CGSCC_PASS("openmp-opt-cgscc", OpenMPOptCGSCCPass())
+CGSCC_PASS("coro-annotation-elide", CoroAnnotationElidePass())
#undef CGSCC_PASS
#ifndef CGSCC_PASS_WITH_PARAMS
diff --git a/llvm/lib/Transforms/Coroutines/CMakeLists.txt
b/llvm/lib/Transforms/Coroutines/CMakeLists.txt
index 2139446e5ff9..b4b5812d97d8 100644
--- a/llvm/lib/Transforms/Coroutines/CMakeLists.txt
+++ b/llvm/lib/Transforms/Coroutines/CMakeLists.txt
@@ -1,5 +1,6 @@
add_llvm_component_library(LLVMCoroutines
Coroutines.cpp
+ CoroAnnotationElide.cpp
CoroCleanup.cpp
CoroConditionalWrapper.cpp
CoroEarly.cpp
diff --git a/llvm/lib/Transforms/Coroutines/CoroAnnotationElide.cpp
b/llvm/lib/Transforms/Coroutines/CoroAnnotationElide.cpp
new file mode 100644
index 000000000000..e380af2cc3a3
--- /dev/null
+++ b/llvm/lib/Transforms/Coroutines/CoroAnnotationElide.cpp
@@ -0,0 +1,108 @@
+//===- CoroSplit.cpp - Converts a coroutine into a state machine
----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Coroutines/CoroAnnotationElide.h"
+
+#include "llvm/Analysis/LazyCallGraph.h"
+#include "llvm/IR/Analysis.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/InstIterator.h"
+#include "llvm/IR/Instruction.h"
+#include "llvm/IR/Module.h"
+
+#include <cassert>
+
+using namespace llvm;
+
+#define DEBUG_TYPE "coro-annotation-elide"
+
+#define CORO_MUST_ELIDE_ANNOTATION "coro_must_elide"
+
+static Instruction *getFirstNonAllocaInTheEntryBlock(Function *F) {
+ for (Instruction &I : F->getEntryBlock())
+ if (!isa<AllocaInst>(&I))
+ return &I;
+ llvm_unreachable("no terminator in the entry block");
+}
+
+static Value *allocateFrameInCaller(Function *Caller, uint64_t FrameSize,
+ Align FrameAlign) {
+ LLVMContext &C = Caller->getContext();
+ BasicBlock::iterator InsertPt =
+ getFirstNonAllocaInTheEntryBlock(Caller)->getIterator();
+ const DataLayout &DL = Caller->getDataLayout();
+ auto FrameTy = ArrayType::get(Type::getInt8Ty(C), FrameSize);
+ auto *Frame = new AllocaInst(FrameTy, DL.getAllocaAddrSpace(), "", InsertPt);
+ Frame->setAlignment(FrameAlign);
+ return new BitCastInst(Frame, PointerType::getUnqual(C), "vFrame", InsertPt);
+}
+
+static void processCall(CallBase *CB, Function *Caller, Function *NewCallee,
+ uint64_t FrameSize, Align FrameAlign) {
+ auto *FramePtr = allocateFrameInCaller(Caller, FrameSize, FrameAlign);
+ CB->setCalledFunction(NewCallee->getFunctionType(), NewCallee);
+ CB->setArgOperand(0, FramePtr);
+ auto NewCBInsertPt = CB->getIterator();
+ llvm::CallBase *NewCB = nullptr;
+ SmallVector<Value *, 4> NewArgs;
+ NewArgs.push_back(FramePtr);
+ NewArgs.append(CB->arg_begin(), CB->arg_end());
+
+ // TODO: bundles?
+ if (auto *CI = dyn_cast<CallInst>(CB)) {
+ NewCB = CallInst::Create(NewCallee->getFunctionType(), NewCallee, NewArgs,
+ "", NewCBInsertPt);
+ } else if (auto *II = dyn_cast<InvokeInst>(CB)) {
+ NewCB = InvokeInst::Create(NewCallee->getFunctionType(), NewCallee,
+ II->getNormalDest(), II->getUnwindDest(),
+ NewArgs, std::nullopt, "", NewCBInsertPt);
+ } else {
+ llvm_unreachable("CallBase should either be Call or Invoke!");
+ }
+
+ CB->replaceAllUsesWith(NewCB);
+ CB->eraseFromParent();
+}
+
+PreservedAnalyses CoroAnnotationElidePass::run(LazyCallGraph::SCC &C,
+ CGSCCAnalysisManager &AM,
+ LazyCallGraph &CG,
+ CGSCCUpdateResult &UR) {
+ // NB: One invariant of a valid LazyCallGraph::SCC is that it must contain a
+ // non-zero number of nodes, so we assume that here and grab the first
+ // node's function's module.
+ Module &M = *C.begin()->getFunction().getParent();
+ bool Changed = false;
+ // Find coroutines for processing.
+ SmallVector<LazyCallGraph::Node *> Coroutines;
+ for (LazyCallGraph::Node &N : C) {
+ Function *Callee = &N.getFunction();
+ Function *NewCallee = Callee->getParent()->getFunction(
+ (Callee->getName() + ".noalloc").getSingleStringRef());
+ if (!NewCallee) {
+ continue;
+ }
+
+ auto FrameSize = NewCallee->getParamDereferenceableBytes(0);
+ auto FrameAlign = NewCallee->getParamAlign(0).valueOrOne();
+
+ for (auto *U : Callee->users()) {
+ if (auto *CB = dyn_cast<CallBase>(U)) {
+ auto *Caller = CB->getFunction();
+ if (Caller && Caller->isPresplitCoroutine() &&
+ CB->hasAnnotationMetadata(CORO_MUST_ELIDE_ANNOTATION)) {
+ processCall(CB, Caller, NewCallee, FrameSize, FrameAlign);
+ Changed = true;
+ }
+ }
+ }
+ }
+ return Changed ? PreservedAnalyses::none() : PreservedAnalyses::all();
+}
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