InRegOffs = 2,
StructReturn = 1<<3, ///< Hidden struct-return pointer
StructReturnOffs = 3,
+ ByVal = 1<<4, ///< Struct passed by value
+ ByValOffs = 4,
OrigAlignment = 0x1F<<27,
OrigAlignmentOffs = 27
};
InReg = 1 << 3, ///< force argument to be passed in register
StructRet = 1 << 4, ///< hidden pointer to structure to return
NoUnwind = 1 << 5, ///< Function doesn't unwind stack
- NoAlias = 1 << 6 ///< Considered to not alias after call.
+ NoAlias = 1 << 6, ///< Considered to not alias after call.
+ ByVal = 1 << 7 ///< Pass structure by value
};
}
nounwind { return NOUNWIND; }
noreturn { return NORETURN; }
noalias { return NOALIAS; }
+byval { return BYVAL; }
void { RET_TY(Type::VoidTy, VOID); }
float { RET_TY(Type::FloatTy, FLOAT); }
%token <OtherOpVal> EXTRACTELEMENT INSERTELEMENT SHUFFLEVECTOR
// Function Attributes
-%token NORETURN INREG SRET NOUNWIND NOALIAS
+%token NORETURN INREG SRET NOUNWIND NOALIAS BYVAL
// Visibility Styles
%token DEFAULT HIDDEN PROTECTED
| INREG { $$ = ParamAttr::InReg; }
| SRET { $$ = ParamAttr::StructRet; }
| NOALIAS { $$ = ParamAttr::NoAlias; }
+ | BYVAL { $$ = ParamAttr::ByVal; }
;
OptParamAttrs : /* empty */ { $$ = ParamAttr::None; }
Flags |= ISD::ParamFlags::InReg;
if (Attrs && Attrs->paramHasAttr(j, ParamAttr::StructRet))
Flags |= ISD::ParamFlags::StructReturn;
+ if (Attrs && Attrs->paramHasAttr(j, ParamAttr::ByVal))
+ Flags |= ISD::ParamFlags::ByVal;
Flags |= (OriginalAlignment << ISD::ParamFlags::OrigAlignmentOffs);
switch (getTypeAction(VT)) {
string Predicate = predicate;
}
+/// CCIfStruct - If the current argument is a struct, apply
+/// Action A.
+class CCIfStruct<CCAction A> : CCIf<"ArgFlags & ISD::ParamFlags::ByVal", A> {
+}
+
/// CCIfCC - Match of the current calling convention is 'CC'.
class CCIfCC<string CC, CCAction A>
: CCIf<!strconcat("State.getCallingConv() == ", CC), A> {}
int Align = align;
}
+/// CCStructAssign - This action always matches: it will use the C ABI and
+/// the register availability to decided whether to assign to a set of
+/// registers or to a stack slot.
+class CCStructAssign<list<Register> regList> : CCAction {
+ list<Register> RegList = regList;
+}
/// CCPromoteToType - If applied, this promotes the specified current value to
/// the specified type.
class CallingConv<list<CCAction> actions> {
list<CCAction> Actions = actions;
}
-
// Promote i8/i16 arguments to i32.
CCIfType<[i8, i16], CCPromoteToType<i32>>,
+ CCIfStruct<CCStructAssign<[RDI, RSI, RDX, RCX, R8, R9 ]>>,
+
// The first 6 integer arguments are passed in integer registers.
CCIfType<[i32], CCAssignToReg<[EDI, ESI, EDX, ECX, R8D, R9D]>>,
CCIfType<[i64], CCAssignToReg<[RDI, RSI, RDX, RCX, R8 , R9 ]>>,
// Otherwise, same as everything else.
CCDelegateTo<CC_X86_32_Common>
]>;
-
-
Result += "noalias ";
if (Attrs & ParamAttr::StructRet)
Result += "sret ";
+ if (Attrs & ParamAttr::ByVal)
+ Result += "byval ";
return Result;
}
if (Attrs->paramHasAttr(Idx, ParamAttr::NoAlias))
Assert1(isa<PointerType>(FT->getParamType(Idx-1)),
"Attribute NoAlias should only apply to Pointer type!", &F);
+ if (Attrs->paramHasAttr(Idx, ParamAttr::ByVal))
+ Assert1(isa<PointerType>(FT->getParamType(Idx-1)),
+ "Attribute ByVal should only apply to Pointer type!", &F);
}
}
<< IndentStr << IndentStr << "LocInfo = CCValAssign::ZExt;\n"
<< IndentStr << "else\n"
<< IndentStr << IndentStr << "LocInfo = CCValAssign::AExt;\n";
+ } else if (Action->isSubClassOf("CCStructAssign")) {
+ O << "assert(0 && \"Not Implemented\");\n";
} else {
Action->dump();
throw "Unknown CCAction!";
}
}
}
-