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Add ABIArgInfo::Direct kind, which passes arguments using whatever the 

native IRgen type is. This is like Default, but without any extra
semantics (like automatic tweaking of structures or void).

llvm-svn: 63615
This commit is contained in:
Daniel Dunbar 2009-02-03 06:17:37 +00:00
parent 5b0de55045
commit 67dace890f
2 changed files with 26 additions and 1 deletions
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8
clang/lib/CodeGen/ABIInfo.h
View File

@ -27,6 +27,10 @@ namespace clang {
public:
enum Kind {
Default,
Direct, /// Pass the argument directly using the normal
/// converted LLVM type.
StructRet, /// Only valid for return values. The return value
/// should be passed through a pointer to a caller
/// allocated location passed as an implicit first
@ -68,6 +72,9 @@ namespace clang {
static ABIArgInfo getDefault() {
return ABIArgInfo(Default);
}
static ABIArgInfo getDirect() {
return ABIArgInfo(Direct);
}
static ABIArgInfo getStructRet() {
return ABIArgInfo(StructRet);
}
@ -86,6 +93,7 @@ namespace clang {
Kind getKind() const { return TheKind; }
bool isDefault() const { return TheKind == Default; }
bool isDirect() const { return TheKind == Direct; }
bool isStructRet() const { return TheKind == StructRet; }
bool isIgnore() const { return TheKind == Ignore; }
bool isCoerce() const { return TheKind == Coerce; }

19
clang/lib/CodeGen/CGCall.cpp
View File

@ -897,6 +897,10 @@ CodeGenTypes::GetFunctionType(const CGFunctionInfo &FI, bool IsVariadic) {
}
break;
case ABIArgInfo::Direct:
ResultType = ConvertType(RetTy);
break;
case ABIArgInfo::StructRet: {
ResultType = llvm::Type::VoidTy;
const llvm::Type *STy = ConvertType(RetTy);
@ -933,6 +937,7 @@ CodeGenTypes::GetFunctionType(const CGFunctionInfo &FI, bool IsVariadic) {
break;
case ABIArgInfo::Default:
case ABIArgInfo::Direct:
ArgTys.push_back(Ty);
break;
@ -967,6 +972,7 @@ void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI,
const ABIArgInfo &RetAI = FI.getReturnInfo();
switch (RetAI.getKind()) {
case ABIArgInfo::Default:
case ABIArgInfo::Direct:
if (RetTy->isPromotableIntegerType()) {
if (RetTy->isSignedIntegerType()) {
RetAttrs |= llvm::Attribute::SExt;
@ -1011,6 +1017,7 @@ void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI,
break;
case ABIArgInfo::Default:
case ABIArgInfo::Direct:
if (ParamType->isPromotableIntegerType()) {
if (ParamType->isSignedIntegerType()) {
Attributes |= llvm::Attribute::SExt;
@ -1068,7 +1075,8 @@ void CodeGenFunction::EmitFunctionProlog(const CGFunctionInfo &FI,
switch (ArgI.getKind()) {
case ABIArgInfo::ByVal:
case ABIArgInfo::Default: {
case ABIArgInfo::Default:
case ABIArgInfo::Direct: {
assert(AI != Fn->arg_end() && "Argument mismatch!");
llvm::Value* V = AI;
if (!getContext().typesAreCompatible(Ty, Arg->getType())) {
@ -1136,6 +1144,7 @@ void CodeGenFunction::EmitFunctionEpilog(const CGFunctionInfo &FI,
break;
case ABIArgInfo::Default:
case ABIArgInfo::Direct:
RV = Builder.CreateLoad(ReturnValue);
break;
@ -1178,6 +1187,7 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
break;
case ABIArgInfo::Default:
case ABIArgInfo::Direct:
case ABIArgInfo::Ignore:
case ABIArgInfo::Coerce:
break;
@ -1196,6 +1206,7 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
switch (ArgInfo.getKind()) {
case ABIArgInfo::ByVal: // Default is byval
case ABIArgInfo::Default:
case ABIArgInfo::Direct:
if (RV.isScalar()) {
Args.push_back(RV.getScalarVal());
} else if (RV.isComplex()) {
@ -1246,6 +1257,12 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
case ABIArgInfo::Default:
return RValue::get(RetTy->isVoidType() ? 0 : CI);
case ABIArgInfo::Direct:
assert((!RetTy->isAnyComplexType() &&
CodeGenFunction::hasAggregateLLVMType(RetTy)) &&
"FIXME: Implemented return for non-scalar direct types.");
return RValue::get(CI);
case ABIArgInfo::Ignore:
if (RetTy->isVoidType())
return RValue::get(0);