Nikita Popov b2fae5b3c7
[Mips] Remove custom "original type" handling (#154082)
Replace Mips custom logic for retaining information about original types
in calling convention lowering by directly querying the OrigTy that is
now available.

There is one change in behavior here: If the return type is a struct
containing fp128 plus additional members, the result is now different,
as we no longer special case to a single fp128 member. I believe this is
fine, because this is a fake ABI anyway: Such cases should actually use
sret, and as such are a frontend responsibility, and Clang will indeed
emit these as sret, not as a return value struct. So this only impacts
manually written IR tests.
2025-08-19 09:26:38 +02:00

45 lines
1.5 KiB
C++

//===---- MipsCCState.h - CCState with Mips specific extensions -----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef MIPSCCSTATE_H
#define MIPSCCSTATE_H
#include "MipsISelLowering.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/CallingConvLower.h"
namespace llvm {
class SDNode;
class MipsSubtarget;
class MipsCCState : public CCState {
public:
enum SpecialCallingConvType { Mips16RetHelperConv, NoSpecialCallingConv };
/// Determine the SpecialCallingConvType for the given callee
static SpecialCallingConvType
getSpecialCallingConvForCallee(const SDNode *Callee,
const MipsSubtarget &Subtarget);
private:
// Used to handle MIPS16-specific calling convention tweaks.
// FIXME: This should probably be a fully fledged calling convention.
SpecialCallingConvType SpecialCallingConv;
public:
MipsCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
SmallVectorImpl<CCValAssign> &locs, LLVMContext &C,
SpecialCallingConvType SpecialCC = NoSpecialCallingConv)
: CCState(CC, isVarArg, MF, locs, C), SpecialCallingConv(SpecialCC) {}
SpecialCallingConvType getSpecialCallingConv() { return SpecialCallingConv; }
};
}
#endif