diff options
Diffstat (limited to 'clang/lib/CodeGen')
| -rw-r--r-- | clang/lib/CodeGen/TargetInfo.cpp | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp index 3870f72487d..ca99ba580a5 100644 --- a/clang/lib/CodeGen/TargetInfo.cpp +++ b/clang/lib/CodeGen/TargetInfo.cpp @@ -5560,7 +5560,39 @@ void MipsABIInfo::computeInfo(CGFunctionInfo &FI) const { llvm::Value* MipsABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty, CodeGenFunction &CGF) const { - return nullptr; + llvm::Type *BP = CGF.Int8PtrTy; + llvm::Type *BPP = CGF.Int8PtrPtrTy; + + CGBuilderTy &Builder = CGF.Builder; + llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr, BPP, "ap"); + llvm::Value *Addr = Builder.CreateLoad(VAListAddrAsBPP, "ap.cur"); + int64_t TypeAlign = getContext().getTypeAlign(Ty) / 8; + llvm::Type *PTy = llvm::PointerType::getUnqual(CGF.ConvertType(Ty)); + llvm::Value *AddrTyped; + unsigned PtrWidth = getTarget().getPointerWidth(0); + llvm::IntegerType *IntTy = (PtrWidth == 32) ? CGF.Int32Ty : CGF.Int64Ty; + + if (TypeAlign > MinABIStackAlignInBytes) { + llvm::Value *AddrAsInt = CGF.Builder.CreatePtrToInt(Addr, IntTy); + llvm::Value *Inc = llvm::ConstantInt::get(IntTy, TypeAlign - 1); + llvm::Value *Mask = llvm::ConstantInt::get(IntTy, -TypeAlign); + llvm::Value *Add = CGF.Builder.CreateAdd(AddrAsInt, Inc); + llvm::Value *And = CGF.Builder.CreateAnd(Add, Mask); + AddrTyped = CGF.Builder.CreateIntToPtr(And, PTy); + } + else + AddrTyped = Builder.CreateBitCast(Addr, PTy); + + llvm::Value *AlignedAddr = Builder.CreateBitCast(AddrTyped, BP); + TypeAlign = std::max((unsigned)TypeAlign, MinABIStackAlignInBytes); + uint64_t Offset = + llvm::RoundUpToAlignment(CGF.getContext().getTypeSize(Ty) / 8, TypeAlign); + llvm::Value *NextAddr = + Builder.CreateGEP(AlignedAddr, llvm::ConstantInt::get(IntTy, Offset), + "ap.next"); + Builder.CreateStore(NextAddr, VAListAddrAsBPP); + + return AddrTyped; } bool |
