diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp index 6f26fc402a6..a5ce6c063f5 100644 --- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp @@ -807,130 +807,145 @@ void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const { // Print out the specified constant, without a storage class. Only the // constants valid in constant expressions can occur here. void AsmPrinter::EmitConstantValueOnly(const Constant *CV) { - if (CV->isNullValue() || isa(CV)) + if (CV->isNullValue() || isa(CV)) { O << '0'; - else if (const ConstantInt *CI = dyn_cast(CV)) { + return; + } + + if (const ConstantInt *CI = dyn_cast(CV)) { O << CI->getZExtValue(); - } else if (const GlobalValue *GV = dyn_cast(CV)) { + return; + } + + if (const GlobalValue *GV = dyn_cast(CV)) { // This is a constant address for a global variable or function. Use the // name of the variable or function as the address value. O << Mang->getMangledName(GV); - } else if (const ConstantExpr *CE = dyn_cast(CV)) { - const TargetData *TD = TM.getTargetData(); - unsigned Opcode = CE->getOpcode(); - switch (Opcode) { - case Instruction::ZExt: - case Instruction::SExt: - case Instruction::FPTrunc: - case Instruction::FPExt: - case Instruction::UIToFP: - case Instruction::SIToFP: - case Instruction::FPToUI: - case Instruction::FPToSI: - llvm_unreachable("FIXME: Don't support this constant cast expr"); - case Instruction::GetElementPtr: { - // generate a symbolic expression for the byte address - const Constant *ptrVal = CE->getOperand(0); - SmallVector idxVec(CE->op_begin()+1, CE->op_end()); - if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], - idxVec.size())) { - // Truncate/sext the offset to the pointer size. - if (TD->getPointerSizeInBits() != 64) { - int SExtAmount = 64-TD->getPointerSizeInBits(); - Offset = (Offset << SExtAmount) >> SExtAmount; - } - - if (Offset) - O << '('; - EmitConstantValueOnly(ptrVal); - if (Offset > 0) - O << ") + " << Offset; - else if (Offset < 0) - O << ") - " << -Offset; - } else { - EmitConstantValueOnly(ptrVal); - } - break; - } - case Instruction::BitCast: - return EmitConstantValueOnly(CE->getOperand(0)); - - case Instruction::IntToPtr: { - // Handle casts to pointers by changing them into casts to the appropriate - // integer type. This promotes constant folding and simplifies this code. - Constant *Op = CE->getOperand(0); - Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(CV->getContext()), - false/*ZExt*/); - return EmitConstantValueOnly(Op); - } - - case Instruction::PtrToInt: { - // Support only foldable casts to/from pointers that can be eliminated by - // changing the pointer to the appropriately sized integer type. - Constant *Op = CE->getOperand(0); - const Type *Ty = CE->getType(); - - // We can emit the pointer value into this slot if the slot is an - // integer slot greater or equal to the size of the pointer. - if (TD->getTypeAllocSize(Ty) == TD->getTypeAllocSize(Op->getType())) - return EmitConstantValueOnly(Op); - - O << "(("; - EmitConstantValueOnly(Op); - APInt ptrMask = - APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Op->getType())); - - SmallString<40> S; - ptrMask.toStringUnsigned(S); - O << ") & " << S.str() << ')'; - break; - } - - case Instruction::Trunc: - // We emit the value and depend on the assembler to truncate the generated - // expression properly. This is important for differences between - // blockaddress labels. Since the two labels are in the same function, it - // is reasonable to treat their delta as a 32-bit value. - return EmitConstantValueOnly(CE->getOperand(0)); - - case Instruction::Add: - case Instruction::Sub: - case Instruction::And: - case Instruction::Or: - case Instruction::Xor: - O << '('; - EmitConstantValueOnly(CE->getOperand(0)); - O << ')'; - switch (Opcode) { - case Instruction::Add: - O << " + "; - break; - case Instruction::Sub: - O << " - "; - break; - case Instruction::And: - O << " & "; - break; - case Instruction::Or: - O << " | "; - break; - case Instruction::Xor: - O << " ^ "; - break; - default: - break; - } - O << '('; - EmitConstantValueOnly(CE->getOperand(1)); - O << ')'; - break; - default: - llvm_unreachable("Unsupported operator!"); - } - } else if (const BlockAddress *BA = dyn_cast(CV)) { + return; + } + + if (const BlockAddress *BA = dyn_cast(CV)) { GetBlockAddressSymbol(BA)->print(O, MAI); - } else { + return; + } + + const ConstantExpr *CE = dyn_cast(CV); + if (CE == 0) { llvm_unreachable("Unknown constant value!"); + O << '0'; + return; + } + + switch (CE->getOpcode()) { + case Instruction::ZExt: + case Instruction::SExt: + case Instruction::FPTrunc: + case Instruction::FPExt: + case Instruction::UIToFP: + case Instruction::SIToFP: + case Instruction::FPToUI: + case Instruction::FPToSI: + default: + llvm_unreachable("FIXME: Don't support this constant cast expr"); + case Instruction::GetElementPtr: { + // generate a symbolic expression for the byte address + const TargetData *TD = TM.getTargetData(); + const Constant *ptrVal = CE->getOperand(0); + SmallVector idxVec(CE->op_begin()+1, CE->op_end()); + int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], + idxVec.size()); + if (Offset == 0) + return EmitConstantValueOnly(ptrVal); + + // Truncate/sext the offset to the pointer size. + if (TD->getPointerSizeInBits() != 64) { + int SExtAmount = 64-TD->getPointerSizeInBits(); + Offset = (Offset << SExtAmount) >> SExtAmount; + } + + if (Offset) + O << '('; + EmitConstantValueOnly(ptrVal); + if (Offset > 0) + O << ") + " << Offset; + else + O << ") - " << -Offset; + return; + } + case Instruction::BitCast: + return EmitConstantValueOnly(CE->getOperand(0)); + + case Instruction::IntToPtr: { + // Handle casts to pointers by changing them into casts to the appropriate + // integer type. This promotes constant folding and simplifies this code. + const TargetData *TD = TM.getTargetData(); + Constant *Op = CE->getOperand(0); + Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(CV->getContext()), + false/*ZExt*/); + return EmitConstantValueOnly(Op); + } + + case Instruction::PtrToInt: { + // Support only foldable casts to/from pointers that can be eliminated by + // changing the pointer to the appropriately sized integer type. + Constant *Op = CE->getOperand(0); + const Type *Ty = CE->getType(); + const TargetData *TD = TM.getTargetData(); + + // We can emit the pointer value into this slot if the slot is an + // integer slot greater or equal to the size of the pointer. + if (TD->getTypeAllocSize(Ty) == TD->getTypeAllocSize(Op->getType())) + return EmitConstantValueOnly(Op); + + O << "(("; + EmitConstantValueOnly(Op); + APInt ptrMask = + APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Op->getType())); + + SmallString<40> S; + ptrMask.toStringUnsigned(S); + O << ") & " << S.str() << ')'; + return; + } + + case Instruction::Trunc: + // We emit the value and depend on the assembler to truncate the generated + // expression properly. This is important for differences between + // blockaddress labels. Since the two labels are in the same function, it + // is reasonable to treat their delta as a 32-bit value. + return EmitConstantValueOnly(CE->getOperand(0)); + + case Instruction::Add: + case Instruction::Sub: + case Instruction::And: + case Instruction::Or: + case Instruction::Xor: + O << '('; + EmitConstantValueOnly(CE->getOperand(0)); + O << ')'; + switch (CE->getOpcode()) { + case Instruction::Add: + O << " + "; + break; + case Instruction::Sub: + O << " - "; + break; + case Instruction::And: + O << " & "; + break; + case Instruction::Or: + O << " | "; + break; + case Instruction::Xor: + O << " ^ "; + break; + default: + break; + } + O << '('; + EmitConstantValueOnly(CE->getOperand(1)); + O << ')'; + break; } }