Date: Wed, 17 Dec 2014 21:36:46 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r275872 - in stable: 10/contrib/llvm/tools/clang/lib/CodeGen 9/contrib/llvm/tools/clang/lib/CodeGen Message-ID: <201412172136.sBHLakDJ020834@svn.freebsd.org>
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Author: dim Date: Wed Dec 17 21:36:45 2014 New Revision: 275872 URL: https://svnweb.freebsd.org/changeset/base/275872 Log: MFC r275759: Pull in r221170 from upstream clang trunk (by Roman Divacky): Implement vaarg lowering for ppc32. Lowering of scalars and aggregates is supported. Complex numbers are not. This adds va_args support for PowerPC (32 bit) to clang. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D1308 Modified: stable/9/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.cpp Directory Properties: stable/9/contrib/llvm/ (props changed) stable/9/contrib/llvm/tools/clang/ (props changed) Changes in other areas also in this revision: Modified: stable/10/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.cpp Directory Properties: stable/10/ (props changed) Modified: stable/9/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.cpp ============================================================================== --- stable/9/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.cpp Wed Dec 17 21:27:27 2014 (r275871) +++ stable/9/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.cpp Wed Dec 17 21:36:45 2014 (r275872) @@ -2733,11 +2733,19 @@ llvm::Value *NaClX86_64ABIInfo::EmitVAAr // PowerPC-32 - namespace { -class PPC32TargetCodeGenInfo : public DefaultTargetCodeGenInfo { +/// PPC32_SVR4_ABIInfo - The 32-bit PowerPC ELF (SVR4) ABI information. +class PPC32_SVR4_ABIInfo : public DefaultABIInfo { public: - PPC32TargetCodeGenInfo(CodeGenTypes &CGT) : DefaultTargetCodeGenInfo(CGT) {} + PPC32_SVR4_ABIInfo(CodeGen::CodeGenTypes &CGT) : DefaultABIInfo(CGT) {} + + llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty, + CodeGenFunction &CGF) const; +}; + +class PPC32TargetCodeGenInfo : public TargetCodeGenInfo { +public: + PPC32TargetCodeGenInfo(CodeGenTypes &CGT) : TargetCodeGenInfo(new PPC32_SVR4_ABIInfo(CGT)) {} int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const { // This is recovered from gcc output. @@ -2750,6 +2758,96 @@ public: } +llvm::Value *PPC32_SVR4_ABIInfo::EmitVAArg(llvm::Value *VAListAddr, + QualType Ty, + CodeGenFunction &CGF) const { + if (const ComplexType *CTy = Ty->getAs<ComplexType>()) { + // TODO: Implement this. For now ignore. + (void)CTy; + return NULL; + } + + bool isI64 = Ty->isIntegerType() && getContext().getTypeSize(Ty) == 64; + bool isInt = Ty->isIntegerType() || Ty->isPointerType() || Ty->isAggregateType(); + llvm::Type *CharPtr = CGF.Int8PtrTy; + llvm::Type *CharPtrPtr = CGF.Int8PtrPtrTy; + + CGBuilderTy &Builder = CGF.Builder; + llvm::Value *GPRPtr = Builder.CreateBitCast(VAListAddr, CharPtr, "gprptr"); + llvm::Value *GPRPtrAsInt = Builder.CreatePtrToInt(GPRPtr, CGF.Int32Ty); + llvm::Value *FPRPtrAsInt = Builder.CreateAdd(GPRPtrAsInt, Builder.getInt32(1)); + llvm::Value *FPRPtr = Builder.CreateIntToPtr(FPRPtrAsInt, CharPtr); + llvm::Value *OverflowAreaPtrAsInt = Builder.CreateAdd(FPRPtrAsInt, Builder.getInt32(3)); + llvm::Value *OverflowAreaPtr = Builder.CreateIntToPtr(OverflowAreaPtrAsInt, CharPtrPtr); + llvm::Value *RegsaveAreaPtrAsInt = Builder.CreateAdd(OverflowAreaPtrAsInt, Builder.getInt32(4)); + llvm::Value *RegsaveAreaPtr = Builder.CreateIntToPtr(RegsaveAreaPtrAsInt, CharPtrPtr); + llvm::Value *GPR = Builder.CreateLoad(GPRPtr, false, "gpr"); + // Align GPR when TY is i64. + if (isI64) { + llvm::Value *GPRAnd = Builder.CreateAnd(GPR, Builder.getInt8(1)); + llvm::Value *CC64 = Builder.CreateICmpEQ(GPRAnd, Builder.getInt8(1)); + llvm::Value *GPRPlusOne = Builder.CreateAdd(GPR, Builder.getInt8(1)); + GPR = Builder.CreateSelect(CC64, GPRPlusOne, GPR); + } + llvm::Value *FPR = Builder.CreateLoad(FPRPtr, false, "fpr"); + llvm::Value *OverflowArea = Builder.CreateLoad(OverflowAreaPtr, false, "overflow_area"); + llvm::Value *OverflowAreaAsInt = Builder.CreatePtrToInt(OverflowArea, CGF.Int32Ty); + llvm::Value *RegsaveArea = Builder.CreateLoad(RegsaveAreaPtr, false, "regsave_area"); + llvm::Value *RegsaveAreaAsInt = Builder.CreatePtrToInt(RegsaveArea, CGF.Int32Ty); + + llvm::Value *CC = Builder.CreateICmpULT(isInt ? GPR : FPR, + Builder.getInt8(8), "cond"); + + llvm::Value *RegConstant = Builder.CreateMul(isInt ? GPR : FPR, + Builder.getInt8(isInt ? 4 : 8)); + + llvm::Value *OurReg = Builder.CreateAdd(RegsaveAreaAsInt, Builder.CreateSExt(RegConstant, CGF.Int32Ty)); + + if (Ty->isFloatingType()) + OurReg = Builder.CreateAdd(OurReg, Builder.getInt32(32)); + + llvm::BasicBlock *UsingRegs = CGF.createBasicBlock("using_regs"); + llvm::BasicBlock *UsingOverflow = CGF.createBasicBlock("using_overflow"); + llvm::BasicBlock *Cont = CGF.createBasicBlock("cont"); + + Builder.CreateCondBr(CC, UsingRegs, UsingOverflow); + + CGF.EmitBlock(UsingRegs); + + llvm::Type *PTy = llvm::PointerType::getUnqual(CGF.ConvertType(Ty)); + llvm::Value *Result1 = Builder.CreateIntToPtr(OurReg, PTy); + // Increase the GPR/FPR indexes. + if (isInt) { + GPR = Builder.CreateAdd(GPR, Builder.getInt8(isI64 ? 2 : 1)); + Builder.CreateStore(GPR, GPRPtr); + } else { + FPR = Builder.CreateAdd(FPR, Builder.getInt8(1)); + Builder.CreateStore(FPR, FPRPtr); + } + CGF.EmitBranch(Cont); + + CGF.EmitBlock(UsingOverflow); + + // Increase the overflow area. + llvm::Value *Result2 = Builder.CreateIntToPtr(OverflowAreaAsInt, PTy); + OverflowAreaAsInt = Builder.CreateAdd(OverflowAreaAsInt, Builder.getInt32(isInt ? 4 : 8)); + Builder.CreateStore(Builder.CreateIntToPtr(OverflowAreaAsInt, CharPtr), OverflowAreaPtr); + CGF.EmitBranch(Cont); + + CGF.EmitBlock(Cont); + + llvm::PHINode *Result = CGF.Builder.CreatePHI(PTy, 2, "vaarg.addr"); + Result->addIncoming(Result1, UsingRegs); + Result->addIncoming(Result2, UsingOverflow); + + if (Ty->isAggregateType()) { + llvm::Value *AGGPtr = Builder.CreateBitCast(Result, CharPtrPtr, "aggrptr") ; + return Builder.CreateLoad(AGGPtr, false, "aggr"); + } + + return Result; +} + bool PPC32TargetCodeGenInfo::initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, llvm::Value *Address) const {
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