mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92568 91177308-0d34-0410-b5e6-96231b3b80d8
2354 lines
95 KiB
C++
2354 lines
95 KiB
C++
//===----- LegalizeIntegerTypes.cpp - Legalization of integer types -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements integer type expansion and promotion for LegalizeTypes.
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// Promotion is the act of changing a computation in an illegal type into a
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// computation in a larger type. For example, implementing i8 arithmetic in an
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// i32 register (often needed on powerpc).
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// Expansion is the act of changing a computation in an illegal type into a
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// computation in two identical registers of a smaller type. For example,
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// implementing i64 arithmetic in two i32 registers (often needed on 32-bit
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// targets).
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//
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//===----------------------------------------------------------------------===//
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#include "LegalizeTypes.h"
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#include "llvm/CodeGen/PseudoSourceValue.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Integer Result Promotion
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//===----------------------------------------------------------------------===//
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/// PromoteIntegerResult - This method is called when a result of a node is
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/// found to be in need of promotion to a larger type. At this point, the node
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/// may also have invalid operands or may have other results that need
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/// expansion, we just know that (at least) one result needs promotion.
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void DAGTypeLegalizer::PromoteIntegerResult(SDNode *N, unsigned ResNo) {
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DEBUG(dbgs() << "Promote integer result: "; N->dump(&DAG); dbgs() << "\n");
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SDValue Res = SDValue();
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// See if the target wants to custom expand this node.
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if (CustomLowerNode(N, N->getValueType(ResNo), true))
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return;
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switch (N->getOpcode()) {
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default:
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#ifndef NDEBUG
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dbgs() << "PromoteIntegerResult #" << ResNo << ": ";
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N->dump(&DAG); dbgs() << "\n";
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#endif
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llvm_unreachable("Do not know how to promote this operator!");
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case ISD::AssertSext: Res = PromoteIntRes_AssertSext(N); break;
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case ISD::AssertZext: Res = PromoteIntRes_AssertZext(N); break;
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case ISD::BIT_CONVERT: Res = PromoteIntRes_BIT_CONVERT(N); break;
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case ISD::BSWAP: Res = PromoteIntRes_BSWAP(N); break;
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case ISD::BUILD_PAIR: Res = PromoteIntRes_BUILD_PAIR(N); break;
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case ISD::Constant: Res = PromoteIntRes_Constant(N); break;
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case ISD::CONVERT_RNDSAT:
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Res = PromoteIntRes_CONVERT_RNDSAT(N); break;
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case ISD::CTLZ: Res = PromoteIntRes_CTLZ(N); break;
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case ISD::CTPOP: Res = PromoteIntRes_CTPOP(N); break;
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case ISD::CTTZ: Res = PromoteIntRes_CTTZ(N); break;
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case ISD::EXTRACT_VECTOR_ELT:
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Res = PromoteIntRes_EXTRACT_VECTOR_ELT(N); break;
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case ISD::LOAD: Res = PromoteIntRes_LOAD(cast<LoadSDNode>(N));break;
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case ISD::SELECT: Res = PromoteIntRes_SELECT(N); break;
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case ISD::SELECT_CC: Res = PromoteIntRes_SELECT_CC(N); break;
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case ISD::SETCC: Res = PromoteIntRes_SETCC(N); break;
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case ISD::SHL: Res = PromoteIntRes_SHL(N); break;
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case ISD::SIGN_EXTEND_INREG:
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Res = PromoteIntRes_SIGN_EXTEND_INREG(N); break;
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case ISD::SRA: Res = PromoteIntRes_SRA(N); break;
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case ISD::SRL: Res = PromoteIntRes_SRL(N); break;
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case ISD::TRUNCATE: Res = PromoteIntRes_TRUNCATE(N); break;
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case ISD::UNDEF: Res = PromoteIntRes_UNDEF(N); break;
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case ISD::VAARG: Res = PromoteIntRes_VAARG(N); break;
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case ISD::SIGN_EXTEND:
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case ISD::ZERO_EXTEND:
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case ISD::ANY_EXTEND: Res = PromoteIntRes_INT_EXTEND(N); break;
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case ISD::FP_TO_SINT:
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case ISD::FP_TO_UINT: Res = PromoteIntRes_FP_TO_XINT(N); break;
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case ISD::AND:
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case ISD::OR:
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case ISD::XOR:
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case ISD::ADD:
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case ISD::SUB:
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case ISD::MUL: Res = PromoteIntRes_SimpleIntBinOp(N); break;
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case ISD::SDIV:
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case ISD::SREM: Res = PromoteIntRes_SDIV(N); break;
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case ISD::UDIV:
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case ISD::UREM: Res = PromoteIntRes_UDIV(N); break;
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case ISD::SADDO:
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case ISD::SSUBO: Res = PromoteIntRes_SADDSUBO(N, ResNo); break;
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case ISD::UADDO:
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case ISD::USUBO: Res = PromoteIntRes_UADDSUBO(N, ResNo); break;
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case ISD::SMULO:
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case ISD::UMULO: Res = PromoteIntRes_XMULO(N, ResNo); break;
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case ISD::ATOMIC_LOAD_ADD:
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case ISD::ATOMIC_LOAD_SUB:
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case ISD::ATOMIC_LOAD_AND:
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case ISD::ATOMIC_LOAD_OR:
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case ISD::ATOMIC_LOAD_XOR:
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case ISD::ATOMIC_LOAD_NAND:
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case ISD::ATOMIC_LOAD_MIN:
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case ISD::ATOMIC_LOAD_MAX:
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case ISD::ATOMIC_LOAD_UMIN:
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case ISD::ATOMIC_LOAD_UMAX:
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case ISD::ATOMIC_SWAP:
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Res = PromoteIntRes_Atomic1(cast<AtomicSDNode>(N)); break;
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case ISD::ATOMIC_CMP_SWAP:
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Res = PromoteIntRes_Atomic2(cast<AtomicSDNode>(N)); break;
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}
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// If the result is null then the sub-method took care of registering it.
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if (Res.getNode())
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SetPromotedInteger(SDValue(N, ResNo), Res);
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_AssertSext(SDNode *N) {
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// Sign-extend the new bits, and continue the assertion.
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SDValue Op = SExtPromotedInteger(N->getOperand(0));
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return DAG.getNode(ISD::AssertSext, N->getDebugLoc(),
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Op.getValueType(), Op, N->getOperand(1));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_AssertZext(SDNode *N) {
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// Zero the new bits, and continue the assertion.
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SDValue Op = ZExtPromotedInteger(N->getOperand(0));
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return DAG.getNode(ISD::AssertZext, N->getDebugLoc(),
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Op.getValueType(), Op, N->getOperand(1));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_Atomic1(AtomicSDNode *N) {
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SDValue Op2 = GetPromotedInteger(N->getOperand(2));
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SDValue Res = DAG.getAtomic(N->getOpcode(), N->getDebugLoc(),
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N->getMemoryVT(),
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N->getChain(), N->getBasePtr(),
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Op2, N->getSrcValue(), N->getAlignment());
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// Legalized the chain result - switch anything that used the old chain to
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// use the new one.
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ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
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return Res;
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_Atomic2(AtomicSDNode *N) {
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SDValue Op2 = GetPromotedInteger(N->getOperand(2));
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SDValue Op3 = GetPromotedInteger(N->getOperand(3));
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SDValue Res = DAG.getAtomic(N->getOpcode(), N->getDebugLoc(),
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N->getMemoryVT(), N->getChain(), N->getBasePtr(),
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Op2, Op3, N->getSrcValue(), N->getAlignment());
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// Legalized the chain result - switch anything that used the old chain to
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// use the new one.
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ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
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return Res;
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_BIT_CONVERT(SDNode *N) {
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SDValue InOp = N->getOperand(0);
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EVT InVT = InOp.getValueType();
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EVT NInVT = TLI.getTypeToTransformTo(*DAG.getContext(), InVT);
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EVT OutVT = N->getValueType(0);
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EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
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DebugLoc dl = N->getDebugLoc();
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switch (getTypeAction(InVT)) {
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default:
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assert(false && "Unknown type action!");
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break;
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case Legal:
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break;
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case PromoteInteger:
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if (NOutVT.bitsEq(NInVT))
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// The input promotes to the same size. Convert the promoted value.
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return DAG.getNode(ISD::BIT_CONVERT, dl,
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NOutVT, GetPromotedInteger(InOp));
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break;
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case SoftenFloat:
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// Promote the integer operand by hand.
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return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT, GetSoftenedFloat(InOp));
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case ExpandInteger:
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case ExpandFloat:
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break;
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case ScalarizeVector:
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// Convert the element to an integer and promote it by hand.
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return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT,
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BitConvertToInteger(GetScalarizedVector(InOp)));
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case SplitVector: {
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// For example, i32 = BIT_CONVERT v2i16 on alpha. Convert the split
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// pieces of the input into integers and reassemble in the final type.
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SDValue Lo, Hi;
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GetSplitVector(N->getOperand(0), Lo, Hi);
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Lo = BitConvertToInteger(Lo);
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Hi = BitConvertToInteger(Hi);
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if (TLI.isBigEndian())
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std::swap(Lo, Hi);
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InOp = DAG.getNode(ISD::ANY_EXTEND, dl,
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EVT::getIntegerVT(*DAG.getContext(), NOutVT.getSizeInBits()),
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JoinIntegers(Lo, Hi));
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return DAG.getNode(ISD::BIT_CONVERT, dl, NOutVT, InOp);
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}
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case WidenVector:
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if (OutVT.bitsEq(NInVT))
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// The input is widened to the same size. Convert to the widened value.
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return DAG.getNode(ISD::BIT_CONVERT, dl, OutVT, GetWidenedVector(InOp));
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}
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return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT,
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CreateStackStoreLoad(InOp, OutVT));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_BSWAP(SDNode *N) {
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SDValue Op = GetPromotedInteger(N->getOperand(0));
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EVT OVT = N->getValueType(0);
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EVT NVT = Op.getValueType();
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DebugLoc dl = N->getDebugLoc();
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unsigned DiffBits = NVT.getSizeInBits() - OVT.getSizeInBits();
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return DAG.getNode(ISD::SRL, dl, NVT, DAG.getNode(ISD::BSWAP, dl, NVT, Op),
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DAG.getConstant(DiffBits, TLI.getPointerTy()));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_BUILD_PAIR(SDNode *N) {
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// The pair element type may be legal, or may not promote to the same type as
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// the result, for example i14 = BUILD_PAIR (i7, i7). Handle all cases.
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return DAG.getNode(ISD::ANY_EXTEND, N->getDebugLoc(),
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TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)),
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JoinIntegers(N->getOperand(0), N->getOperand(1)));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_Constant(SDNode *N) {
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EVT VT = N->getValueType(0);
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// FIXME there is no actual debug info here
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DebugLoc dl = N->getDebugLoc();
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// Zero extend things like i1, sign extend everything else. It shouldn't
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// matter in theory which one we pick, but this tends to give better code?
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unsigned Opc = VT.isByteSized() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
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SDValue Result = DAG.getNode(Opc, dl, TLI.getTypeToTransformTo(*DAG.getContext(), VT),
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SDValue(N, 0));
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assert(isa<ConstantSDNode>(Result) && "Didn't constant fold ext?");
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return Result;
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_CONVERT_RNDSAT(SDNode *N) {
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ISD::CvtCode CvtCode = cast<CvtRndSatSDNode>(N)->getCvtCode();
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assert ((CvtCode == ISD::CVT_SS || CvtCode == ISD::CVT_SU ||
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CvtCode == ISD::CVT_US || CvtCode == ISD::CVT_UU ||
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CvtCode == ISD::CVT_SF || CvtCode == ISD::CVT_UF) &&
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"can only promote integers");
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EVT OutVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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return DAG.getConvertRndSat(OutVT, N->getDebugLoc(), N->getOperand(0),
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N->getOperand(1), N->getOperand(2),
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N->getOperand(3), N->getOperand(4), CvtCode);
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_CTLZ(SDNode *N) {
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// Zero extend to the promoted type and do the count there.
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SDValue Op = ZExtPromotedInteger(N->getOperand(0));
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DebugLoc dl = N->getDebugLoc();
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EVT OVT = N->getValueType(0);
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EVT NVT = Op.getValueType();
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Op = DAG.getNode(ISD::CTLZ, dl, NVT, Op);
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// Subtract off the extra leading bits in the bigger type.
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return DAG.getNode(ISD::SUB, dl, NVT, Op,
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DAG.getConstant(NVT.getSizeInBits() -
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OVT.getSizeInBits(), NVT));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_CTPOP(SDNode *N) {
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// Zero extend to the promoted type and do the count there.
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SDValue Op = ZExtPromotedInteger(N->getOperand(0));
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return DAG.getNode(ISD::CTPOP, N->getDebugLoc(), Op.getValueType(), Op);
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_CTTZ(SDNode *N) {
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SDValue Op = GetPromotedInteger(N->getOperand(0));
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EVT OVT = N->getValueType(0);
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EVT NVT = Op.getValueType();
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DebugLoc dl = N->getDebugLoc();
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// The count is the same in the promoted type except if the original
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// value was zero. This can be handled by setting the bit just off
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// the top of the original type.
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APInt TopBit(NVT.getSizeInBits(), 0);
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TopBit.set(OVT.getSizeInBits());
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Op = DAG.getNode(ISD::OR, dl, NVT, Op, DAG.getConstant(TopBit, NVT));
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return DAG.getNode(ISD::CTTZ, dl, NVT, Op);
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N) {
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DebugLoc dl = N->getDebugLoc();
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NVT, N->getOperand(0),
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N->getOperand(1));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_FP_TO_XINT(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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unsigned NewOpc = N->getOpcode();
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DebugLoc dl = N->getDebugLoc();
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// If we're promoting a UINT to a larger size and the larger FP_TO_UINT is
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// not Legal, check to see if we can use FP_TO_SINT instead. (If both UINT
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// and SINT conversions are Custom, there is no way to tell which is preferable.
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// We choose SINT because that's the right thing on PPC.)
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if (N->getOpcode() == ISD::FP_TO_UINT &&
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!TLI.isOperationLegal(ISD::FP_TO_UINT, NVT) &&
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TLI.isOperationLegalOrCustom(ISD::FP_TO_SINT, NVT))
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NewOpc = ISD::FP_TO_SINT;
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SDValue Res = DAG.getNode(NewOpc, dl, NVT, N->getOperand(0));
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// Assert that the converted value fits in the original type. If it doesn't
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// (eg: because the value being converted is too big), then the result of the
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// original operation was undefined anyway, so the assert is still correct.
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return DAG.getNode(N->getOpcode() == ISD::FP_TO_UINT ?
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ISD::AssertZext : ISD::AssertSext, dl,
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NVT, Res, DAG.getValueType(N->getValueType(0)));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_INT_EXTEND(SDNode *N) {
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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DebugLoc dl = N->getDebugLoc();
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if (getTypeAction(N->getOperand(0).getValueType()) == PromoteInteger) {
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SDValue Res = GetPromotedInteger(N->getOperand(0));
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assert(Res.getValueType().bitsLE(NVT) && "Extension doesn't make sense!");
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// If the result and operand types are the same after promotion, simplify
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// to an in-register extension.
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if (NVT == Res.getValueType()) {
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// The high bits are not guaranteed to be anything. Insert an extend.
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if (N->getOpcode() == ISD::SIGN_EXTEND)
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return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NVT, Res,
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DAG.getValueType(N->getOperand(0).getValueType()));
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if (N->getOpcode() == ISD::ZERO_EXTEND)
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return DAG.getZeroExtendInReg(Res, dl, N->getOperand(0).getValueType());
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assert(N->getOpcode() == ISD::ANY_EXTEND && "Unknown integer extension!");
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return Res;
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}
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}
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// Otherwise, just extend the original operand all the way to the larger type.
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return DAG.getNode(N->getOpcode(), dl, NVT, N->getOperand(0));
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_LOAD(LoadSDNode *N) {
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assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
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ISD::LoadExtType ExtType =
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ISD::isNON_EXTLoad(N) ? ISD::EXTLOAD : N->getExtensionType();
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DebugLoc dl = N->getDebugLoc();
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SDValue Res = DAG.getExtLoad(ExtType, dl, NVT, N->getChain(), N->getBasePtr(),
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N->getSrcValue(), N->getSrcValueOffset(),
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N->getMemoryVT(), N->isVolatile(),
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N->getAlignment());
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// Legalized the chain result - switch anything that used the old chain to
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// use the new one.
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ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
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return Res;
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}
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/// Promote the overflow flag of an overflowing arithmetic node.
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SDValue DAGTypeLegalizer::PromoteIntRes_Overflow(SDNode *N) {
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// Simply change the return type of the boolean result.
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EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(1));
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EVT ValueVTs[] = { N->getValueType(0), NVT };
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SDValue Ops[] = { N->getOperand(0), N->getOperand(1) };
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SDValue Res = DAG.getNode(N->getOpcode(), N->getDebugLoc(),
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DAG.getVTList(ValueVTs, 2), Ops, 2);
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// Modified the sum result - switch anything that used the old sum to use
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// the new one.
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ReplaceValueWith(SDValue(N, 0), Res);
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return SDValue(Res.getNode(), 1);
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}
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SDValue DAGTypeLegalizer::PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo) {
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if (ResNo == 1)
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return PromoteIntRes_Overflow(N);
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// The operation overflowed iff the result in the larger type is not the
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// sign extension of its truncation to the original type.
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SDValue LHS = SExtPromotedInteger(N->getOperand(0));
|
|
SDValue RHS = SExtPromotedInteger(N->getOperand(1));
|
|
EVT OVT = N->getOperand(0).getValueType();
|
|
EVT NVT = LHS.getValueType();
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
// Do the arithmetic in the larger type.
|
|
unsigned Opcode = N->getOpcode() == ISD::SADDO ? ISD::ADD : ISD::SUB;
|
|
SDValue Res = DAG.getNode(Opcode, dl, NVT, LHS, RHS);
|
|
|
|
// Calculate the overflow flag: sign extend the arithmetic result from
|
|
// the original type.
|
|
SDValue Ofl = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NVT, Res,
|
|
DAG.getValueType(OVT));
|
|
// Overflowed if and only if this is not equal to Res.
|
|
Ofl = DAG.getSetCC(dl, N->getValueType(1), Ofl, Res, ISD::SETNE);
|
|
|
|
// Use the calculated overflow everywhere.
|
|
ReplaceValueWith(SDValue(N, 1), Ofl);
|
|
|
|
return Res;
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SDIV(SDNode *N) {
|
|
// Sign extend the input.
|
|
SDValue LHS = SExtPromotedInteger(N->getOperand(0));
|
|
SDValue RHS = SExtPromotedInteger(N->getOperand(1));
|
|
return DAG.getNode(N->getOpcode(), N->getDebugLoc(),
|
|
LHS.getValueType(), LHS, RHS);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SELECT(SDNode *N) {
|
|
SDValue LHS = GetPromotedInteger(N->getOperand(1));
|
|
SDValue RHS = GetPromotedInteger(N->getOperand(2));
|
|
return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
|
|
LHS.getValueType(), N->getOperand(0),LHS,RHS);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SELECT_CC(SDNode *N) {
|
|
SDValue LHS = GetPromotedInteger(N->getOperand(2));
|
|
SDValue RHS = GetPromotedInteger(N->getOperand(3));
|
|
return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
|
|
LHS.getValueType(), N->getOperand(0),
|
|
N->getOperand(1), LHS, RHS, N->getOperand(4));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SETCC(SDNode *N) {
|
|
EVT SVT = TLI.getSetCCResultType(N->getOperand(0).getValueType());
|
|
assert(isTypeLegal(SVT) && "Illegal SetCC type!");
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
// Get the SETCC result using the canonical SETCC type.
|
|
SDValue SetCC = DAG.getNode(ISD::SETCC, dl, SVT, N->getOperand(0),
|
|
N->getOperand(1), N->getOperand(2));
|
|
|
|
// Convert to the expected type.
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
assert(NVT.bitsLE(SVT) && "Integer type overpromoted?");
|
|
return DAG.getNode(ISD::TRUNCATE, dl, NVT, SetCC);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SHL(SDNode *N) {
|
|
return DAG.getNode(ISD::SHL, N->getDebugLoc(),
|
|
TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)),
|
|
GetPromotedInteger(N->getOperand(0)), N->getOperand(1));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N) {
|
|
SDValue Op = GetPromotedInteger(N->getOperand(0));
|
|
return DAG.getNode(ISD::SIGN_EXTEND_INREG, N->getDebugLoc(),
|
|
Op.getValueType(), Op, N->getOperand(1));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SimpleIntBinOp(SDNode *N) {
|
|
// The input may have strange things in the top bits of the registers, but
|
|
// these operations don't care. They may have weird bits going out, but
|
|
// that too is okay if they are integer operations.
|
|
SDValue LHS = GetPromotedInteger(N->getOperand(0));
|
|
SDValue RHS = GetPromotedInteger(N->getOperand(1));
|
|
return DAG.getNode(N->getOpcode(), N->getDebugLoc(),
|
|
LHS.getValueType(), LHS, RHS);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SRA(SDNode *N) {
|
|
// The input value must be properly sign extended.
|
|
SDValue Res = SExtPromotedInteger(N->getOperand(0));
|
|
return DAG.getNode(ISD::SRA, N->getDebugLoc(),
|
|
Res.getValueType(), Res, N->getOperand(1));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_SRL(SDNode *N) {
|
|
// The input value must be properly zero extended.
|
|
EVT VT = N->getValueType(0);
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
|
|
SDValue Res = ZExtPromotedInteger(N->getOperand(0));
|
|
return DAG.getNode(ISD::SRL, N->getDebugLoc(), NVT, Res, N->getOperand(1));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_TRUNCATE(SDNode *N) {
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
SDValue Res;
|
|
|
|
switch (getTypeAction(N->getOperand(0).getValueType())) {
|
|
default: llvm_unreachable("Unknown type action!");
|
|
case Legal:
|
|
case ExpandInteger:
|
|
Res = N->getOperand(0);
|
|
break;
|
|
case PromoteInteger:
|
|
Res = GetPromotedInteger(N->getOperand(0));
|
|
break;
|
|
}
|
|
|
|
// Truncate to NVT instead of VT
|
|
return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), NVT, Res);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo) {
|
|
if (ResNo == 1)
|
|
return PromoteIntRes_Overflow(N);
|
|
|
|
// The operation overflowed iff the result in the larger type is not the
|
|
// zero extension of its truncation to the original type.
|
|
SDValue LHS = ZExtPromotedInteger(N->getOperand(0));
|
|
SDValue RHS = ZExtPromotedInteger(N->getOperand(1));
|
|
EVT OVT = N->getOperand(0).getValueType();
|
|
EVT NVT = LHS.getValueType();
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
// Do the arithmetic in the larger type.
|
|
unsigned Opcode = N->getOpcode() == ISD::UADDO ? ISD::ADD : ISD::SUB;
|
|
SDValue Res = DAG.getNode(Opcode, dl, NVT, LHS, RHS);
|
|
|
|
// Calculate the overflow flag: zero extend the arithmetic result from
|
|
// the original type.
|
|
SDValue Ofl = DAG.getZeroExtendInReg(Res, dl, OVT);
|
|
// Overflowed if and only if this is not equal to Res.
|
|
Ofl = DAG.getSetCC(dl, N->getValueType(1), Ofl, Res, ISD::SETNE);
|
|
|
|
// Use the calculated overflow everywhere.
|
|
ReplaceValueWith(SDValue(N, 1), Ofl);
|
|
|
|
return Res;
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_UDIV(SDNode *N) {
|
|
// Zero extend the input.
|
|
SDValue LHS = ZExtPromotedInteger(N->getOperand(0));
|
|
SDValue RHS = ZExtPromotedInteger(N->getOperand(1));
|
|
return DAG.getNode(N->getOpcode(), N->getDebugLoc(),
|
|
LHS.getValueType(), LHS, RHS);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_UNDEF(SDNode *N) {
|
|
return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_VAARG(SDNode *N) {
|
|
SDValue Chain = N->getOperand(0); // Get the chain.
|
|
SDValue Ptr = N->getOperand(1); // Get the pointer.
|
|
EVT VT = N->getValueType(0);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
EVT RegVT = TLI.getRegisterType(*DAG.getContext(), VT);
|
|
unsigned NumRegs = TLI.getNumRegisters(*DAG.getContext(), VT);
|
|
// The argument is passed as NumRegs registers of type RegVT.
|
|
|
|
SmallVector<SDValue, 8> Parts(NumRegs);
|
|
for (unsigned i = 0; i < NumRegs; ++i) {
|
|
Parts[i] = DAG.getVAArg(RegVT, dl, Chain, Ptr, N->getOperand(2));
|
|
Chain = Parts[i].getValue(1);
|
|
}
|
|
|
|
// Handle endianness of the load.
|
|
if (TLI.isBigEndian())
|
|
std::reverse(Parts.begin(), Parts.end());
|
|
|
|
// Assemble the parts in the promoted type.
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
SDValue Res = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, Parts[0]);
|
|
for (unsigned i = 1; i < NumRegs; ++i) {
|
|
SDValue Part = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, Parts[i]);
|
|
// Shift it to the right position and "or" it in.
|
|
Part = DAG.getNode(ISD::SHL, dl, NVT, Part,
|
|
DAG.getConstant(i * RegVT.getSizeInBits(),
|
|
TLI.getPointerTy()));
|
|
Res = DAG.getNode(ISD::OR, dl, NVT, Res, Part);
|
|
}
|
|
|
|
// Modified the chain result - switch anything that used the old chain to
|
|
// use the new one.
|
|
ReplaceValueWith(SDValue(N, 1), Chain);
|
|
|
|
return Res;
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntRes_XMULO(SDNode *N, unsigned ResNo) {
|
|
assert(ResNo == 1 && "Only boolean result promotion currently supported!");
|
|
return PromoteIntRes_Overflow(N);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Integer Operand Promotion
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// PromoteIntegerOperand - This method is called when the specified operand of
|
|
/// the specified node is found to need promotion. At this point, all of the
|
|
/// result types of the node are known to be legal, but other operands of the
|
|
/// node may need promotion or expansion as well as the specified one.
|
|
bool DAGTypeLegalizer::PromoteIntegerOperand(SDNode *N, unsigned OpNo) {
|
|
DEBUG(dbgs() << "Promote integer operand: "; N->dump(&DAG); dbgs() << "\n");
|
|
SDValue Res = SDValue();
|
|
|
|
if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
|
|
return false;
|
|
|
|
switch (N->getOpcode()) {
|
|
default:
|
|
#ifndef NDEBUG
|
|
dbgs() << "PromoteIntegerOperand Op #" << OpNo << ": ";
|
|
N->dump(&DAG); dbgs() << "\n";
|
|
#endif
|
|
llvm_unreachable("Do not know how to promote this operator's operand!");
|
|
|
|
case ISD::ANY_EXTEND: Res = PromoteIntOp_ANY_EXTEND(N); break;
|
|
case ISD::BIT_CONVERT: Res = PromoteIntOp_BIT_CONVERT(N); break;
|
|
case ISD::BR_CC: Res = PromoteIntOp_BR_CC(N, OpNo); break;
|
|
case ISD::BRCOND: Res = PromoteIntOp_BRCOND(N, OpNo); break;
|
|
case ISD::BUILD_PAIR: Res = PromoteIntOp_BUILD_PAIR(N); break;
|
|
case ISD::BUILD_VECTOR: Res = PromoteIntOp_BUILD_VECTOR(N); break;
|
|
case ISD::CONVERT_RNDSAT:
|
|
Res = PromoteIntOp_CONVERT_RNDSAT(N); break;
|
|
case ISD::INSERT_VECTOR_ELT:
|
|
Res = PromoteIntOp_INSERT_VECTOR_ELT(N, OpNo);break;
|
|
case ISD::MEMBARRIER: Res = PromoteIntOp_MEMBARRIER(N); break;
|
|
case ISD::SCALAR_TO_VECTOR:
|
|
Res = PromoteIntOp_SCALAR_TO_VECTOR(N); break;
|
|
case ISD::SELECT: Res = PromoteIntOp_SELECT(N, OpNo); break;
|
|
case ISD::SELECT_CC: Res = PromoteIntOp_SELECT_CC(N, OpNo); break;
|
|
case ISD::SETCC: Res = PromoteIntOp_SETCC(N, OpNo); break;
|
|
case ISD::SIGN_EXTEND: Res = PromoteIntOp_SIGN_EXTEND(N); break;
|
|
case ISD::SINT_TO_FP: Res = PromoteIntOp_SINT_TO_FP(N); break;
|
|
case ISD::STORE: Res = PromoteIntOp_STORE(cast<StoreSDNode>(N),
|
|
OpNo); break;
|
|
case ISD::TRUNCATE: Res = PromoteIntOp_TRUNCATE(N); break;
|
|
case ISD::UINT_TO_FP: Res = PromoteIntOp_UINT_TO_FP(N); break;
|
|
case ISD::ZERO_EXTEND: Res = PromoteIntOp_ZERO_EXTEND(N); break;
|
|
|
|
case ISD::SHL:
|
|
case ISD::SRA:
|
|
case ISD::SRL:
|
|
case ISD::ROTL:
|
|
case ISD::ROTR: Res = PromoteIntOp_Shift(N); break;
|
|
}
|
|
|
|
// If the result is null, the sub-method took care of registering results etc.
|
|
if (!Res.getNode()) return false;
|
|
|
|
// If the result is N, the sub-method updated N in place. Tell the legalizer
|
|
// core about this.
|
|
if (Res.getNode() == N)
|
|
return true;
|
|
|
|
assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
|
|
"Invalid operand expansion");
|
|
|
|
ReplaceValueWith(SDValue(N, 0), Res);
|
|
return false;
|
|
}
|
|
|
|
/// PromoteSetCCOperands - Promote the operands of a comparison. This code is
|
|
/// shared among BR_CC, SELECT_CC, and SETCC handlers.
|
|
void DAGTypeLegalizer::PromoteSetCCOperands(SDValue &NewLHS,SDValue &NewRHS,
|
|
ISD::CondCode CCCode) {
|
|
// We have to insert explicit sign or zero extends. Note that we could
|
|
// insert sign extends for ALL conditions, but zero extend is cheaper on
|
|
// many machines (an AND instead of two shifts), so prefer it.
|
|
switch (CCCode) {
|
|
default: llvm_unreachable("Unknown integer comparison!");
|
|
case ISD::SETEQ:
|
|
case ISD::SETNE:
|
|
case ISD::SETUGE:
|
|
case ISD::SETUGT:
|
|
case ISD::SETULE:
|
|
case ISD::SETULT:
|
|
// ALL of these operations will work if we either sign or zero extend
|
|
// the operands (including the unsigned comparisons!). Zero extend is
|
|
// usually a simpler/cheaper operation, so prefer it.
|
|
NewLHS = ZExtPromotedInteger(NewLHS);
|
|
NewRHS = ZExtPromotedInteger(NewRHS);
|
|
break;
|
|
case ISD::SETGE:
|
|
case ISD::SETGT:
|
|
case ISD::SETLT:
|
|
case ISD::SETLE:
|
|
NewLHS = SExtPromotedInteger(NewLHS);
|
|
NewRHS = SExtPromotedInteger(NewRHS);
|
|
break;
|
|
}
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_ANY_EXTEND(SDNode *N) {
|
|
SDValue Op = GetPromotedInteger(N->getOperand(0));
|
|
return DAG.getNode(ISD::ANY_EXTEND, N->getDebugLoc(), N->getValueType(0), Op);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_BIT_CONVERT(SDNode *N) {
|
|
// This should only occur in unusual situations like bitcasting to an
|
|
// x86_fp80, so just turn it into a store+load
|
|
return CreateStackStoreLoad(N->getOperand(0), N->getValueType(0));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo) {
|
|
assert(OpNo == 2 && "Don't know how to promote this operand!");
|
|
|
|
SDValue LHS = N->getOperand(2);
|
|
SDValue RHS = N->getOperand(3);
|
|
PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(1))->get());
|
|
|
|
// The chain (Op#0), CC (#1) and basic block destination (Op#4) are always
|
|
// legal types.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
|
|
N->getOperand(1), LHS, RHS, N->getOperand(4));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo) {
|
|
assert(OpNo == 1 && "only know how to promote condition");
|
|
|
|
// Promote all the way up to the canonical SetCC type.
|
|
EVT SVT = TLI.getSetCCResultType(MVT::Other);
|
|
SDValue Cond = PromoteTargetBoolean(N->getOperand(1), SVT);
|
|
|
|
// The chain (Op#0) and basic block destination (Op#2) are always legal types.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0), Cond,
|
|
N->getOperand(2));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_BUILD_PAIR(SDNode *N) {
|
|
// Since the result type is legal, the operands must promote to it.
|
|
EVT OVT = N->getOperand(0).getValueType();
|
|
SDValue Lo = ZExtPromotedInteger(N->getOperand(0));
|
|
SDValue Hi = GetPromotedInteger(N->getOperand(1));
|
|
assert(Lo.getValueType() == N->getValueType(0) && "Operand over promoted?");
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
Hi = DAG.getNode(ISD::SHL, dl, N->getValueType(0), Hi,
|
|
DAG.getConstant(OVT.getSizeInBits(), TLI.getPointerTy()));
|
|
return DAG.getNode(ISD::OR, dl, N->getValueType(0), Lo, Hi);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_BUILD_VECTOR(SDNode *N) {
|
|
// The vector type is legal but the element type is not. This implies
|
|
// that the vector is a power-of-two in length and that the element
|
|
// type does not have a strange size (eg: it is not i1).
|
|
EVT VecVT = N->getValueType(0);
|
|
unsigned NumElts = VecVT.getVectorNumElements();
|
|
assert(!(NumElts & 1) && "Legal vector of one illegal element?");
|
|
|
|
// Promote the inserted value. The type does not need to match the
|
|
// vector element type. Check that any extra bits introduced will be
|
|
// truncated away.
|
|
assert(N->getOperand(0).getValueType().getSizeInBits() >=
|
|
N->getValueType(0).getVectorElementType().getSizeInBits() &&
|
|
"Type of inserted value narrower than vector element type!");
|
|
|
|
SmallVector<SDValue, 16> NewOps;
|
|
for (unsigned i = 0; i < NumElts; ++i)
|
|
NewOps.push_back(GetPromotedInteger(N->getOperand(i)));
|
|
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), &NewOps[0], NumElts);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_CONVERT_RNDSAT(SDNode *N) {
|
|
ISD::CvtCode CvtCode = cast<CvtRndSatSDNode>(N)->getCvtCode();
|
|
assert ((CvtCode == ISD::CVT_SS || CvtCode == ISD::CVT_SU ||
|
|
CvtCode == ISD::CVT_US || CvtCode == ISD::CVT_UU ||
|
|
CvtCode == ISD::CVT_FS || CvtCode == ISD::CVT_FU) &&
|
|
"can only promote integer arguments");
|
|
SDValue InOp = GetPromotedInteger(N->getOperand(0));
|
|
return DAG.getConvertRndSat(N->getValueType(0), N->getDebugLoc(), InOp,
|
|
N->getOperand(1), N->getOperand(2),
|
|
N->getOperand(3), N->getOperand(4), CvtCode);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N,
|
|
unsigned OpNo) {
|
|
if (OpNo == 1) {
|
|
// Promote the inserted value. This is valid because the type does not
|
|
// have to match the vector element type.
|
|
|
|
// Check that any extra bits introduced will be truncated away.
|
|
assert(N->getOperand(1).getValueType().getSizeInBits() >=
|
|
N->getValueType(0).getVectorElementType().getSizeInBits() &&
|
|
"Type of inserted value narrower than vector element type!");
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
|
|
GetPromotedInteger(N->getOperand(1)),
|
|
N->getOperand(2));
|
|
}
|
|
|
|
assert(OpNo == 2 && "Different operand and result vector types?");
|
|
|
|
// Promote the index.
|
|
SDValue Idx = ZExtPromotedInteger(N->getOperand(2));
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
|
|
N->getOperand(1), Idx);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_MEMBARRIER(SDNode *N) {
|
|
SDValue NewOps[6];
|
|
DebugLoc dl = N->getDebugLoc();
|
|
NewOps[0] = N->getOperand(0);
|
|
for (unsigned i = 1; i < array_lengthof(NewOps); ++i) {
|
|
SDValue Flag = GetPromotedInteger(N->getOperand(i));
|
|
NewOps[i] = DAG.getZeroExtendInReg(Flag, dl, MVT::i1);
|
|
}
|
|
return DAG.UpdateNodeOperands(SDValue (N, 0), NewOps,
|
|
array_lengthof(NewOps));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_SCALAR_TO_VECTOR(SDNode *N) {
|
|
// Integer SCALAR_TO_VECTOR operands are implicitly truncated, so just promote
|
|
// the operand in place.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0),
|
|
GetPromotedInteger(N->getOperand(0)));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_SELECT(SDNode *N, unsigned OpNo) {
|
|
assert(OpNo == 0 && "Only know how to promote condition");
|
|
|
|
// Promote all the way up to the canonical SetCC type.
|
|
EVT SVT = TLI.getSetCCResultType(N->getOperand(1).getValueType());
|
|
SDValue Cond = PromoteTargetBoolean(N->getOperand(0), SVT);
|
|
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), Cond,
|
|
N->getOperand(1), N->getOperand(2));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo) {
|
|
assert(OpNo == 0 && "Don't know how to promote this operand!");
|
|
|
|
SDValue LHS = N->getOperand(0);
|
|
SDValue RHS = N->getOperand(1);
|
|
PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(4))->get());
|
|
|
|
// The CC (#4) and the possible return values (#2 and #3) have legal types.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), LHS, RHS, N->getOperand(2),
|
|
N->getOperand(3), N->getOperand(4));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_SETCC(SDNode *N, unsigned OpNo) {
|
|
assert(OpNo == 0 && "Don't know how to promote this operand!");
|
|
|
|
SDValue LHS = N->getOperand(0);
|
|
SDValue RHS = N->getOperand(1);
|
|
PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(2))->get());
|
|
|
|
// The CC (#2) is always legal.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), LHS, RHS, N->getOperand(2));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_Shift(SDNode *N) {
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
|
|
ZExtPromotedInteger(N->getOperand(1)));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_SIGN_EXTEND(SDNode *N) {
|
|
SDValue Op = GetPromotedInteger(N->getOperand(0));
|
|
DebugLoc dl = N->getDebugLoc();
|
|
Op = DAG.getNode(ISD::ANY_EXTEND, dl, N->getValueType(0), Op);
|
|
return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Op.getValueType(),
|
|
Op, DAG.getValueType(N->getOperand(0).getValueType()));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_SINT_TO_FP(SDNode *N) {
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0),
|
|
SExtPromotedInteger(N->getOperand(0)));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo){
|
|
assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
|
|
SDValue Ch = N->getChain(), Ptr = N->getBasePtr();
|
|
int SVOffset = N->getSrcValueOffset();
|
|
unsigned Alignment = N->getAlignment();
|
|
bool isVolatile = N->isVolatile();
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
SDValue Val = GetPromotedInteger(N->getValue()); // Get promoted value.
|
|
|
|
// Truncate the value and store the result.
|
|
return DAG.getTruncStore(Ch, dl, Val, Ptr, N->getSrcValue(),
|
|
SVOffset, N->getMemoryVT(),
|
|
isVolatile, Alignment);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_TRUNCATE(SDNode *N) {
|
|
SDValue Op = GetPromotedInteger(N->getOperand(0));
|
|
return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), N->getValueType(0), Op);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_UINT_TO_FP(SDNode *N) {
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0),
|
|
ZExtPromotedInteger(N->getOperand(0)));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::PromoteIntOp_ZERO_EXTEND(SDNode *N) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
SDValue Op = GetPromotedInteger(N->getOperand(0));
|
|
Op = DAG.getNode(ISD::ANY_EXTEND, dl, N->getValueType(0), Op);
|
|
return DAG.getZeroExtendInReg(Op, dl, N->getOperand(0).getValueType());
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Integer Result Expansion
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// ExpandIntegerResult - This method is called when the specified result of the
|
|
/// specified node is found to need expansion. At this point, the node may also
|
|
/// have invalid operands or may have other results that need promotion, we just
|
|
/// know that (at least) one result needs expansion.
|
|
void DAGTypeLegalizer::ExpandIntegerResult(SDNode *N, unsigned ResNo) {
|
|
DEBUG(dbgs() << "Expand integer result: "; N->dump(&DAG); dbgs() << "\n");
|
|
SDValue Lo, Hi;
|
|
Lo = Hi = SDValue();
|
|
|
|
// See if the target wants to custom expand this node.
|
|
if (CustomLowerNode(N, N->getValueType(ResNo), true))
|
|
return;
|
|
|
|
switch (N->getOpcode()) {
|
|
default:
|
|
#ifndef NDEBUG
|
|
dbgs() << "ExpandIntegerResult #" << ResNo << ": ";
|
|
N->dump(&DAG); dbgs() << "\n";
|
|
#endif
|
|
llvm_unreachable("Do not know how to expand the result of this operator!");
|
|
|
|
case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
|
|
case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
|
|
case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
|
|
case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
|
|
|
|
case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
|
|
case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
|
|
case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
|
|
case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
|
|
case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
|
|
|
|
case ISD::ANY_EXTEND: ExpandIntRes_ANY_EXTEND(N, Lo, Hi); break;
|
|
case ISD::AssertSext: ExpandIntRes_AssertSext(N, Lo, Hi); break;
|
|
case ISD::AssertZext: ExpandIntRes_AssertZext(N, Lo, Hi); break;
|
|
case ISD::BSWAP: ExpandIntRes_BSWAP(N, Lo, Hi); break;
|
|
case ISD::Constant: ExpandIntRes_Constant(N, Lo, Hi); break;
|
|
case ISD::CTLZ: ExpandIntRes_CTLZ(N, Lo, Hi); break;
|
|
case ISD::CTPOP: ExpandIntRes_CTPOP(N, Lo, Hi); break;
|
|
case ISD::CTTZ: ExpandIntRes_CTTZ(N, Lo, Hi); break;
|
|
case ISD::FP_TO_SINT: ExpandIntRes_FP_TO_SINT(N, Lo, Hi); break;
|
|
case ISD::FP_TO_UINT: ExpandIntRes_FP_TO_UINT(N, Lo, Hi); break;
|
|
case ISD::LOAD: ExpandIntRes_LOAD(cast<LoadSDNode>(N), Lo, Hi); break;
|
|
case ISD::MUL: ExpandIntRes_MUL(N, Lo, Hi); break;
|
|
case ISD::SDIV: ExpandIntRes_SDIV(N, Lo, Hi); break;
|
|
case ISD::SIGN_EXTEND: ExpandIntRes_SIGN_EXTEND(N, Lo, Hi); break;
|
|
case ISD::SIGN_EXTEND_INREG: ExpandIntRes_SIGN_EXTEND_INREG(N, Lo, Hi); break;
|
|
case ISD::SREM: ExpandIntRes_SREM(N, Lo, Hi); break;
|
|
case ISD::TRUNCATE: ExpandIntRes_TRUNCATE(N, Lo, Hi); break;
|
|
case ISD::UDIV: ExpandIntRes_UDIV(N, Lo, Hi); break;
|
|
case ISD::UREM: ExpandIntRes_UREM(N, Lo, Hi); break;
|
|
case ISD::ZERO_EXTEND: ExpandIntRes_ZERO_EXTEND(N, Lo, Hi); break;
|
|
|
|
case ISD::AND:
|
|
case ISD::OR:
|
|
case ISD::XOR: ExpandIntRes_Logical(N, Lo, Hi); break;
|
|
|
|
case ISD::ADD:
|
|
case ISD::SUB: ExpandIntRes_ADDSUB(N, Lo, Hi); break;
|
|
|
|
case ISD::ADDC:
|
|
case ISD::SUBC: ExpandIntRes_ADDSUBC(N, Lo, Hi); break;
|
|
|
|
case ISD::ADDE:
|
|
case ISD::SUBE: ExpandIntRes_ADDSUBE(N, Lo, Hi); break;
|
|
|
|
case ISD::SHL:
|
|
case ISD::SRA:
|
|
case ISD::SRL: ExpandIntRes_Shift(N, Lo, Hi); break;
|
|
}
|
|
|
|
// If Lo/Hi is null, the sub-method took care of registering results etc.
|
|
if (Lo.getNode())
|
|
SetExpandedInteger(SDValue(N, ResNo), Lo, Hi);
|
|
}
|
|
|
|
/// ExpandShiftByConstant - N is a shift by a value that needs to be expanded,
|
|
/// and the shift amount is a constant 'Amt'. Expand the operation.
|
|
void DAGTypeLegalizer::ExpandShiftByConstant(SDNode *N, unsigned Amt,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
// Expand the incoming operand to be shifted, so that we have its parts
|
|
SDValue InL, InH;
|
|
GetExpandedInteger(N->getOperand(0), InL, InH);
|
|
|
|
EVT NVT = InL.getValueType();
|
|
unsigned VTBits = N->getValueType(0).getSizeInBits();
|
|
unsigned NVTBits = NVT.getSizeInBits();
|
|
EVT ShTy = N->getOperand(1).getValueType();
|
|
|
|
if (N->getOpcode() == ISD::SHL) {
|
|
if (Amt > VTBits) {
|
|
Lo = Hi = DAG.getConstant(0, NVT);
|
|
} else if (Amt > NVTBits) {
|
|
Lo = DAG.getConstant(0, NVT);
|
|
Hi = DAG.getNode(ISD::SHL, dl,
|
|
NVT, InL, DAG.getConstant(Amt-NVTBits,ShTy));
|
|
} else if (Amt == NVTBits) {
|
|
Lo = DAG.getConstant(0, NVT);
|
|
Hi = InL;
|
|
} else if (Amt == 1 &&
|
|
TLI.isOperationLegalOrCustom(ISD::ADDC,
|
|
TLI.getTypeToExpandTo(*DAG.getContext(), NVT))) {
|
|
// Emit this X << 1 as X+X.
|
|
SDVTList VTList = DAG.getVTList(NVT, MVT::Flag);
|
|
SDValue LoOps[2] = { InL, InL };
|
|
Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps, 2);
|
|
SDValue HiOps[3] = { InH, InH, Lo.getValue(1) };
|
|
Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps, 3);
|
|
} else {
|
|
Lo = DAG.getNode(ISD::SHL, dl, NVT, InL, DAG.getConstant(Amt, ShTy));
|
|
Hi = DAG.getNode(ISD::OR, dl, NVT,
|
|
DAG.getNode(ISD::SHL, dl, NVT, InH,
|
|
DAG.getConstant(Amt, ShTy)),
|
|
DAG.getNode(ISD::SRL, dl, NVT, InL,
|
|
DAG.getConstant(NVTBits-Amt, ShTy)));
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (N->getOpcode() == ISD::SRL) {
|
|
if (Amt > VTBits) {
|
|
Lo = DAG.getConstant(0, NVT);
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else if (Amt > NVTBits) {
|
|
Lo = DAG.getNode(ISD::SRL, dl,
|
|
NVT, InH, DAG.getConstant(Amt-NVTBits,ShTy));
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else if (Amt == NVTBits) {
|
|
Lo = InH;
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else {
|
|
Lo = DAG.getNode(ISD::OR, dl, NVT,
|
|
DAG.getNode(ISD::SRL, dl, NVT, InL,
|
|
DAG.getConstant(Amt, ShTy)),
|
|
DAG.getNode(ISD::SHL, dl, NVT, InH,
|
|
DAG.getConstant(NVTBits-Amt, ShTy)));
|
|
Hi = DAG.getNode(ISD::SRL, dl, NVT, InH, DAG.getConstant(Amt, ShTy));
|
|
}
|
|
return;
|
|
}
|
|
|
|
assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
|
|
if (Amt > VTBits) {
|
|
Hi = Lo = DAG.getNode(ISD::SRA, dl, NVT, InH,
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
} else if (Amt > NVTBits) {
|
|
Lo = DAG.getNode(ISD::SRA, dl, NVT, InH,
|
|
DAG.getConstant(Amt-NVTBits, ShTy));
|
|
Hi = DAG.getNode(ISD::SRA, dl, NVT, InH,
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
} else if (Amt == NVTBits) {
|
|
Lo = InH;
|
|
Hi = DAG.getNode(ISD::SRA, dl, NVT, InH,
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
} else {
|
|
Lo = DAG.getNode(ISD::OR, dl, NVT,
|
|
DAG.getNode(ISD::SRL, dl, NVT, InL,
|
|
DAG.getConstant(Amt, ShTy)),
|
|
DAG.getNode(ISD::SHL, dl, NVT, InH,
|
|
DAG.getConstant(NVTBits-Amt, ShTy)));
|
|
Hi = DAG.getNode(ISD::SRA, dl, NVT, InH, DAG.getConstant(Amt, ShTy));
|
|
}
|
|
}
|
|
|
|
/// ExpandShiftWithKnownAmountBit - Try to determine whether we can simplify
|
|
/// this shift based on knowledge of the high bit of the shift amount. If we
|
|
/// can tell this, we know that it is >= 32 or < 32, without knowing the actual
|
|
/// shift amount.
|
|
bool DAGTypeLegalizer::
|
|
ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi) {
|
|
SDValue Amt = N->getOperand(1);
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
EVT ShTy = Amt.getValueType();
|
|
unsigned ShBits = ShTy.getSizeInBits();
|
|
unsigned NVTBits = NVT.getSizeInBits();
|
|
assert(isPowerOf2_32(NVTBits) &&
|
|
"Expanded integer type size not a power of two!");
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
APInt HighBitMask = APInt::getHighBitsSet(ShBits, ShBits - Log2_32(NVTBits));
|
|
APInt KnownZero, KnownOne;
|
|
DAG.ComputeMaskedBits(N->getOperand(1), HighBitMask, KnownZero, KnownOne);
|
|
|
|
// If we don't know anything about the high bits, exit.
|
|
if (((KnownZero|KnownOne) & HighBitMask) == 0)
|
|
return false;
|
|
|
|
// Get the incoming operand to be shifted.
|
|
SDValue InL, InH;
|
|
GetExpandedInteger(N->getOperand(0), InL, InH);
|
|
|
|
// If we know that any of the high bits of the shift amount are one, then we
|
|
// can do this as a couple of simple shifts.
|
|
if (KnownOne.intersects(HighBitMask)) {
|
|
// Mask out the high bit, which we know is set.
|
|
Amt = DAG.getNode(ISD::AND, dl, ShTy, Amt,
|
|
DAG.getConstant(~HighBitMask, ShTy));
|
|
|
|
switch (N->getOpcode()) {
|
|
default: llvm_unreachable("Unknown shift");
|
|
case ISD::SHL:
|
|
Lo = DAG.getConstant(0, NVT); // Low part is zero.
|
|
Hi = DAG.getNode(ISD::SHL, dl, NVT, InL, Amt); // High part from Lo part.
|
|
return true;
|
|
case ISD::SRL:
|
|
Hi = DAG.getConstant(0, NVT); // Hi part is zero.
|
|
Lo = DAG.getNode(ISD::SRL, dl, NVT, InH, Amt); // Lo part from Hi part.
|
|
return true;
|
|
case ISD::SRA:
|
|
Hi = DAG.getNode(ISD::SRA, dl, NVT, InH, // Sign extend high part.
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
Lo = DAG.getNode(ISD::SRA, dl, NVT, InH, Amt); // Lo part from Hi part.
|
|
return true;
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
// FIXME: This code is broken for shifts with a zero amount!
|
|
// If we know that all of the high bits of the shift amount are zero, then we
|
|
// can do this as a couple of simple shifts.
|
|
if ((KnownZero & HighBitMask) == HighBitMask) {
|
|
// Compute 32-amt.
|
|
SDValue Amt2 = DAG.getNode(ISD::SUB, ShTy,
|
|
DAG.getConstant(NVTBits, ShTy),
|
|
Amt);
|
|
unsigned Op1, Op2;
|
|
switch (N->getOpcode()) {
|
|
default: llvm_unreachable("Unknown shift");
|
|
case ISD::SHL: Op1 = ISD::SHL; Op2 = ISD::SRL; break;
|
|
case ISD::SRL:
|
|
case ISD::SRA: Op1 = ISD::SRL; Op2 = ISD::SHL; break;
|
|
}
|
|
|
|
Lo = DAG.getNode(N->getOpcode(), NVT, InL, Amt);
|
|
Hi = DAG.getNode(ISD::OR, NVT,
|
|
DAG.getNode(Op1, NVT, InH, Amt),
|
|
DAG.getNode(Op2, NVT, InL, Amt2));
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ExpandShiftWithUnknownAmountBit - Fully general expansion of integer shift
|
|
/// of any size.
|
|
bool DAGTypeLegalizer::
|
|
ExpandShiftWithUnknownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi) {
|
|
SDValue Amt = N->getOperand(1);
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
EVT ShTy = Amt.getValueType();
|
|
unsigned NVTBits = NVT.getSizeInBits();
|
|
assert(isPowerOf2_32(NVTBits) &&
|
|
"Expanded integer type size not a power of two!");
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
// Get the incoming operand to be shifted.
|
|
SDValue InL, InH;
|
|
GetExpandedInteger(N->getOperand(0), InL, InH);
|
|
|
|
SDValue NVBitsNode = DAG.getConstant(NVTBits, ShTy);
|
|
SDValue AmtExcess = DAG.getNode(ISD::SUB, dl, ShTy, Amt, NVBitsNode);
|
|
SDValue AmtLack = DAG.getNode(ISD::SUB, dl, ShTy, NVBitsNode, Amt);
|
|
SDValue isShort = DAG.getSetCC(dl, TLI.getSetCCResultType(ShTy),
|
|
Amt, NVBitsNode, ISD::SETULT);
|
|
|
|
SDValue LoS, HiS, LoL, HiL;
|
|
switch (N->getOpcode()) {
|
|
default: llvm_unreachable("Unknown shift");
|
|
case ISD::SHL:
|
|
// Short: ShAmt < NVTBits
|
|
LoS = DAG.getNode(ISD::SHL, dl, NVT, InL, Amt);
|
|
HiS = DAG.getNode(ISD::OR, dl, NVT,
|
|
DAG.getNode(ISD::SHL, dl, NVT, InH, Amt),
|
|
// FIXME: If Amt is zero, the following shift generates an undefined result
|
|
// on some architectures.
|
|
DAG.getNode(ISD::SRL, dl, NVT, InL, AmtLack));
|
|
|
|
// Long: ShAmt >= NVTBits
|
|
LoL = DAG.getConstant(0, NVT); // Lo part is zero.
|
|
HiL = DAG.getNode(ISD::SHL, dl, NVT, InL, AmtExcess); // Hi from Lo part.
|
|
|
|
Lo = DAG.getNode(ISD::SELECT, dl, NVT, isShort, LoS, LoL);
|
|
Hi = DAG.getNode(ISD::SELECT, dl, NVT, isShort, HiS, HiL);
|
|
return true;
|
|
case ISD::SRL:
|
|
// Short: ShAmt < NVTBits
|
|
HiS = DAG.getNode(ISD::SRL, dl, NVT, InH, Amt);
|
|
LoS = DAG.getNode(ISD::OR, dl, NVT,
|
|
DAG.getNode(ISD::SRL, dl, NVT, InL, Amt),
|
|
// FIXME: If Amt is zero, the following shift generates an undefined result
|
|
// on some architectures.
|
|
DAG.getNode(ISD::SHL, dl, NVT, InH, AmtLack));
|
|
|
|
// Long: ShAmt >= NVTBits
|
|
HiL = DAG.getConstant(0, NVT); // Hi part is zero.
|
|
LoL = DAG.getNode(ISD::SRL, dl, NVT, InH, AmtExcess); // Lo from Hi part.
|
|
|
|
Lo = DAG.getNode(ISD::SELECT, dl, NVT, isShort, LoS, LoL);
|
|
Hi = DAG.getNode(ISD::SELECT, dl, NVT, isShort, HiS, HiL);
|
|
return true;
|
|
case ISD::SRA:
|
|
// Short: ShAmt < NVTBits
|
|
HiS = DAG.getNode(ISD::SRA, dl, NVT, InH, Amt);
|
|
LoS = DAG.getNode(ISD::OR, dl, NVT,
|
|
DAG.getNode(ISD::SRL, dl, NVT, InL, Amt),
|
|
// FIXME: If Amt is zero, the following shift generates an undefined result
|
|
// on some architectures.
|
|
DAG.getNode(ISD::SHL, dl, NVT, InH, AmtLack));
|
|
|
|
// Long: ShAmt >= NVTBits
|
|
HiL = DAG.getNode(ISD::SRA, dl, NVT, InH, // Sign of Hi part.
|
|
DAG.getConstant(NVTBits-1, ShTy));
|
|
LoL = DAG.getNode(ISD::SRA, dl, NVT, InH, AmtExcess); // Lo from Hi part.
|
|
|
|
Lo = DAG.getNode(ISD::SELECT, dl, NVT, isShort, LoS, LoL);
|
|
Hi = DAG.getNode(ISD::SELECT, dl, NVT, isShort, HiS, HiL);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_ADDSUB(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
// Expand the subcomponents.
|
|
SDValue LHSL, LHSH, RHSL, RHSH;
|
|
GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
|
|
GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
|
|
|
|
EVT NVT = LHSL.getValueType();
|
|
SDValue LoOps[2] = { LHSL, RHSL };
|
|
SDValue HiOps[3] = { LHSH, RHSH };
|
|
|
|
// Do not generate ADDC/ADDE or SUBC/SUBE if the target does not support
|
|
// them. TODO: Teach operation legalization how to expand unsupported
|
|
// ADDC/ADDE/SUBC/SUBE. The problem is that these operations generate
|
|
// a carry of type MVT::Flag, but there doesn't seem to be any way to
|
|
// generate a value of this type in the expanded code sequence.
|
|
bool hasCarry =
|
|
TLI.isOperationLegalOrCustom(N->getOpcode() == ISD::ADD ?
|
|
ISD::ADDC : ISD::SUBC,
|
|
TLI.getTypeToExpandTo(*DAG.getContext(), NVT));
|
|
|
|
if (hasCarry) {
|
|
SDVTList VTList = DAG.getVTList(NVT, MVT::Flag);
|
|
if (N->getOpcode() == ISD::ADD) {
|
|
Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps, 2);
|
|
HiOps[2] = Lo.getValue(1);
|
|
Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps, 3);
|
|
} else {
|
|
Lo = DAG.getNode(ISD::SUBC, dl, VTList, LoOps, 2);
|
|
HiOps[2] = Lo.getValue(1);
|
|
Hi = DAG.getNode(ISD::SUBE, dl, VTList, HiOps, 3);
|
|
}
|
|
} else {
|
|
if (N->getOpcode() == ISD::ADD) {
|
|
Lo = DAG.getNode(ISD::ADD, dl, NVT, LoOps, 2);
|
|
Hi = DAG.getNode(ISD::ADD, dl, NVT, HiOps, 2);
|
|
SDValue Cmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Lo, LoOps[0],
|
|
ISD::SETULT);
|
|
SDValue Carry1 = DAG.getNode(ISD::SELECT, dl, NVT, Cmp1,
|
|
DAG.getConstant(1, NVT),
|
|
DAG.getConstant(0, NVT));
|
|
SDValue Cmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Lo, LoOps[1],
|
|
ISD::SETULT);
|
|
SDValue Carry2 = DAG.getNode(ISD::SELECT, dl, NVT, Cmp2,
|
|
DAG.getConstant(1, NVT), Carry1);
|
|
Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, Carry2);
|
|
} else {
|
|
Lo = DAG.getNode(ISD::SUB, dl, NVT, LoOps, 2);
|
|
Hi = DAG.getNode(ISD::SUB, dl, NVT, HiOps, 2);
|
|
SDValue Cmp =
|
|
DAG.getSetCC(dl, TLI.getSetCCResultType(LoOps[0].getValueType()),
|
|
LoOps[0], LoOps[1], ISD::SETULT);
|
|
SDValue Borrow = DAG.getNode(ISD::SELECT, dl, NVT, Cmp,
|
|
DAG.getConstant(1, NVT),
|
|
DAG.getConstant(0, NVT));
|
|
Hi = DAG.getNode(ISD::SUB, dl, NVT, Hi, Borrow);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_ADDSUBC(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
// Expand the subcomponents.
|
|
SDValue LHSL, LHSH, RHSL, RHSH;
|
|
DebugLoc dl = N->getDebugLoc();
|
|
GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
|
|
GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
|
|
SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
|
|
SDValue LoOps[2] = { LHSL, RHSL };
|
|
SDValue HiOps[3] = { LHSH, RHSH };
|
|
|
|
if (N->getOpcode() == ISD::ADDC) {
|
|
Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps, 2);
|
|
HiOps[2] = Lo.getValue(1);
|
|
Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps, 3);
|
|
} else {
|
|
Lo = DAG.getNode(ISD::SUBC, dl, VTList, LoOps, 2);
|
|
HiOps[2] = Lo.getValue(1);
|
|
Hi = DAG.getNode(ISD::SUBE, dl, VTList, HiOps, 3);
|
|
}
|
|
|
|
// Legalized the flag result - switch anything that used the old flag to
|
|
// use the new one.
|
|
ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_ADDSUBE(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
// Expand the subcomponents.
|
|
SDValue LHSL, LHSH, RHSL, RHSH;
|
|
DebugLoc dl = N->getDebugLoc();
|
|
GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
|
|
GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
|
|
SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
|
|
SDValue LoOps[3] = { LHSL, RHSL, N->getOperand(2) };
|
|
SDValue HiOps[3] = { LHSH, RHSH };
|
|
|
|
Lo = DAG.getNode(N->getOpcode(), dl, VTList, LoOps, 3);
|
|
HiOps[2] = Lo.getValue(1);
|
|
Hi = DAG.getNode(N->getOpcode(), dl, VTList, HiOps, 3);
|
|
|
|
// Legalized the flag result - switch anything that used the old flag to
|
|
// use the new one.
|
|
ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_ANY_EXTEND(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
DebugLoc dl = N->getDebugLoc();
|
|
SDValue Op = N->getOperand(0);
|
|
if (Op.getValueType().bitsLE(NVT)) {
|
|
// The low part is any extension of the input (which degenerates to a copy).
|
|
Lo = DAG.getNode(ISD::ANY_EXTEND, dl, NVT, Op);
|
|
Hi = DAG.getUNDEF(NVT); // The high part is undefined.
|
|
} else {
|
|
// For example, extension of an i48 to an i64. The operand type necessarily
|
|
// promotes to the result type, so will end up being expanded too.
|
|
assert(getTypeAction(Op.getValueType()) == PromoteInteger &&
|
|
"Only know how to promote this result!");
|
|
SDValue Res = GetPromotedInteger(Op);
|
|
assert(Res.getValueType() == N->getValueType(0) &&
|
|
"Operand over promoted?");
|
|
// Split the promoted operand. This will simplify when it is expanded.
|
|
SplitInteger(Res, Lo, Hi);
|
|
}
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_AssertSext(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
GetExpandedInteger(N->getOperand(0), Lo, Hi);
|
|
EVT NVT = Lo.getValueType();
|
|
EVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
|
|
unsigned NVTBits = NVT.getSizeInBits();
|
|
unsigned EVTBits = EVT.getSizeInBits();
|
|
|
|
if (NVTBits < EVTBits) {
|
|
Hi = DAG.getNode(ISD::AssertSext, dl, NVT, Hi,
|
|
DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(), EVTBits - NVTBits)));
|
|
} else {
|
|
Lo = DAG.getNode(ISD::AssertSext, dl, NVT, Lo, DAG.getValueType(EVT));
|
|
// The high part replicates the sign bit of Lo, make it explicit.
|
|
Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
|
|
DAG.getConstant(NVTBits-1, TLI.getPointerTy()));
|
|
}
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_AssertZext(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
GetExpandedInteger(N->getOperand(0), Lo, Hi);
|
|
EVT NVT = Lo.getValueType();
|
|
EVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
|
|
unsigned NVTBits = NVT.getSizeInBits();
|
|
unsigned EVTBits = EVT.getSizeInBits();
|
|
|
|
if (NVTBits < EVTBits) {
|
|
Hi = DAG.getNode(ISD::AssertZext, dl, NVT, Hi,
|
|
DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(), EVTBits - NVTBits)));
|
|
} else {
|
|
Lo = DAG.getNode(ISD::AssertZext, dl, NVT, Lo, DAG.getValueType(EVT));
|
|
// The high part must be zero, make it explicit.
|
|
Hi = DAG.getConstant(0, NVT);
|
|
}
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_BSWAP(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
GetExpandedInteger(N->getOperand(0), Hi, Lo); // Note swapped operands.
|
|
Lo = DAG.getNode(ISD::BSWAP, dl, Lo.getValueType(), Lo);
|
|
Hi = DAG.getNode(ISD::BSWAP, dl, Hi.getValueType(), Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_Constant(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
unsigned NBitWidth = NVT.getSizeInBits();
|
|
const APInt &Cst = cast<ConstantSDNode>(N)->getAPIntValue();
|
|
Lo = DAG.getConstant(APInt(Cst).trunc(NBitWidth), NVT);
|
|
Hi = DAG.getConstant(Cst.lshr(NBitWidth).trunc(NBitWidth), NVT);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_CTLZ(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
// ctlz (HiLo) -> Hi != 0 ? ctlz(Hi) : (ctlz(Lo)+32)
|
|
GetExpandedInteger(N->getOperand(0), Lo, Hi);
|
|
EVT NVT = Lo.getValueType();
|
|
|
|
SDValue HiNotZero = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Hi,
|
|
DAG.getConstant(0, NVT), ISD::SETNE);
|
|
|
|
SDValue LoLZ = DAG.getNode(ISD::CTLZ, dl, NVT, Lo);
|
|
SDValue HiLZ = DAG.getNode(ISD::CTLZ, dl, NVT, Hi);
|
|
|
|
Lo = DAG.getNode(ISD::SELECT, dl, NVT, HiNotZero, HiLZ,
|
|
DAG.getNode(ISD::ADD, dl, NVT, LoLZ,
|
|
DAG.getConstant(NVT.getSizeInBits(), NVT)));
|
|
Hi = DAG.getConstant(0, NVT);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_CTPOP(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
// ctpop(HiLo) -> ctpop(Hi)+ctpop(Lo)
|
|
GetExpandedInteger(N->getOperand(0), Lo, Hi);
|
|
EVT NVT = Lo.getValueType();
|
|
Lo = DAG.getNode(ISD::ADD, dl, NVT, DAG.getNode(ISD::CTPOP, dl, NVT, Lo),
|
|
DAG.getNode(ISD::CTPOP, dl, NVT, Hi));
|
|
Hi = DAG.getConstant(0, NVT);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_CTTZ(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
// cttz (HiLo) -> Lo != 0 ? cttz(Lo) : (cttz(Hi)+32)
|
|
GetExpandedInteger(N->getOperand(0), Lo, Hi);
|
|
EVT NVT = Lo.getValueType();
|
|
|
|
SDValue LoNotZero = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Lo,
|
|
DAG.getConstant(0, NVT), ISD::SETNE);
|
|
|
|
SDValue LoLZ = DAG.getNode(ISD::CTTZ, dl, NVT, Lo);
|
|
SDValue HiLZ = DAG.getNode(ISD::CTTZ, dl, NVT, Hi);
|
|
|
|
Lo = DAG.getNode(ISD::SELECT, dl, NVT, LoNotZero, LoLZ,
|
|
DAG.getNode(ISD::ADD, dl, NVT, HiLZ,
|
|
DAG.getConstant(NVT.getSizeInBits(), NVT)));
|
|
Hi = DAG.getConstant(0, NVT);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_FP_TO_SINT(SDNode *N, SDValue &Lo,
|
|
SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
EVT VT = N->getValueType(0);
|
|
SDValue Op = N->getOperand(0);
|
|
RTLIB::Libcall LC = RTLIB::getFPTOSINT(Op.getValueType(), VT);
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected fp-to-sint conversion!");
|
|
SplitInteger(MakeLibCall(LC, VT, &Op, 1, true/*irrelevant*/, dl), Lo, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_FP_TO_UINT(SDNode *N, SDValue &Lo,
|
|
SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
EVT VT = N->getValueType(0);
|
|
SDValue Op = N->getOperand(0);
|
|
RTLIB::Libcall LC = RTLIB::getFPTOUINT(Op.getValueType(), VT);
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected fp-to-uint conversion!");
|
|
SplitInteger(MakeLibCall(LC, VT, &Op, 1, false/*irrelevant*/, dl), Lo, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_LOAD(LoadSDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
if (ISD::isNormalLoad(N)) {
|
|
ExpandRes_NormalLoad(N, Lo, Hi);
|
|
return;
|
|
}
|
|
|
|
assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
|
|
|
|
EVT VT = N->getValueType(0);
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
|
|
SDValue Ch = N->getChain();
|
|
SDValue Ptr = N->getBasePtr();
|
|
ISD::LoadExtType ExtType = N->getExtensionType();
|
|
int SVOffset = N->getSrcValueOffset();
|
|
unsigned Alignment = N->getAlignment();
|
|
bool isVolatile = N->isVolatile();
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
assert(NVT.isByteSized() && "Expanded type not byte sized!");
|
|
|
|
if (N->getMemoryVT().bitsLE(NVT)) {
|
|
EVT MemVT = N->getMemoryVT();
|
|
|
|
Lo = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getSrcValue(), SVOffset,
|
|
MemVT, isVolatile, Alignment);
|
|
|
|
// Remember the chain.
|
|
Ch = Lo.getValue(1);
|
|
|
|
if (ExtType == ISD::SEXTLOAD) {
|
|
// The high part is obtained by SRA'ing all but one of the bits of the
|
|
// lo part.
|
|
unsigned LoSize = Lo.getValueType().getSizeInBits();
|
|
Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
|
|
DAG.getConstant(LoSize-1, TLI.getPointerTy()));
|
|
} else if (ExtType == ISD::ZEXTLOAD) {
|
|
// The high part is just a zero.
|
|
Hi = DAG.getConstant(0, NVT);
|
|
} else {
|
|
assert(ExtType == ISD::EXTLOAD && "Unknown extload!");
|
|
// The high part is undefined.
|
|
Hi = DAG.getUNDEF(NVT);
|
|
}
|
|
} else if (TLI.isLittleEndian()) {
|
|
// Little-endian - low bits are at low addresses.
|
|
Lo = DAG.getLoad(NVT, dl, Ch, Ptr, N->getSrcValue(), SVOffset,
|
|
isVolatile, Alignment);
|
|
|
|
unsigned ExcessBits =
|
|
N->getMemoryVT().getSizeInBits() - NVT.getSizeInBits();
|
|
EVT NEVT = EVT::getIntegerVT(*DAG.getContext(), ExcessBits);
|
|
|
|
// Increment the pointer to the other half.
|
|
unsigned IncrementSize = NVT.getSizeInBits()/8;
|
|
Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
|
|
DAG.getIntPtrConstant(IncrementSize));
|
|
Hi = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getSrcValue(),
|
|
SVOffset+IncrementSize, NEVT,
|
|
isVolatile, MinAlign(Alignment, IncrementSize));
|
|
|
|
// Build a factor node to remember that this load is independent of the
|
|
// other one.
|
|
Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
|
|
Hi.getValue(1));
|
|
} else {
|
|
// Big-endian - high bits are at low addresses. Favor aligned loads at
|
|
// the cost of some bit-fiddling.
|
|
EVT MemVT = N->getMemoryVT();
|
|
unsigned EBytes = MemVT.getStoreSize();
|
|
unsigned IncrementSize = NVT.getSizeInBits()/8;
|
|
unsigned ExcessBits = (EBytes - IncrementSize)*8;
|
|
|
|
// Load both the high bits and maybe some of the low bits.
|
|
Hi = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getSrcValue(), SVOffset,
|
|
EVT::getIntegerVT(*DAG.getContext(),
|
|
MemVT.getSizeInBits() - ExcessBits),
|
|
isVolatile, Alignment);
|
|
|
|
// Increment the pointer to the other half.
|
|
Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
|
|
DAG.getIntPtrConstant(IncrementSize));
|
|
// Load the rest of the low bits.
|
|
Lo = DAG.getExtLoad(ISD::ZEXTLOAD, dl, NVT, Ch, Ptr, N->getSrcValue(),
|
|
SVOffset+IncrementSize,
|
|
EVT::getIntegerVT(*DAG.getContext(), ExcessBits),
|
|
isVolatile, MinAlign(Alignment, IncrementSize));
|
|
|
|
// Build a factor node to remember that this load is independent of the
|
|
// other one.
|
|
Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
|
|
Hi.getValue(1));
|
|
|
|
if (ExcessBits < NVT.getSizeInBits()) {
|
|
// Transfer low bits from the bottom of Hi to the top of Lo.
|
|
Lo = DAG.getNode(ISD::OR, dl, NVT, Lo,
|
|
DAG.getNode(ISD::SHL, dl, NVT, Hi,
|
|
DAG.getConstant(ExcessBits,
|
|
TLI.getPointerTy())));
|
|
// Move high bits to the right position in Hi.
|
|
Hi = DAG.getNode(ExtType == ISD::SEXTLOAD ? ISD::SRA : ISD::SRL, dl,
|
|
NVT, Hi,
|
|
DAG.getConstant(NVT.getSizeInBits() - ExcessBits,
|
|
TLI.getPointerTy()));
|
|
}
|
|
}
|
|
|
|
// Legalized the chain result - switch anything that used the old chain to
|
|
// use the new one.
|
|
ReplaceValueWith(SDValue(N, 1), Ch);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_Logical(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
SDValue LL, LH, RL, RH;
|
|
GetExpandedInteger(N->getOperand(0), LL, LH);
|
|
GetExpandedInteger(N->getOperand(1), RL, RH);
|
|
Lo = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LL, RL);
|
|
Hi = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LH, RH);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_MUL(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT VT = N->getValueType(0);
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
bool HasMULHS = TLI.isOperationLegalOrCustom(ISD::MULHS, NVT);
|
|
bool HasMULHU = TLI.isOperationLegalOrCustom(ISD::MULHU, NVT);
|
|
bool HasSMUL_LOHI = TLI.isOperationLegalOrCustom(ISD::SMUL_LOHI, NVT);
|
|
bool HasUMUL_LOHI = TLI.isOperationLegalOrCustom(ISD::UMUL_LOHI, NVT);
|
|
if (HasMULHU || HasMULHS || HasUMUL_LOHI || HasSMUL_LOHI) {
|
|
SDValue LL, LH, RL, RH;
|
|
GetExpandedInteger(N->getOperand(0), LL, LH);
|
|
GetExpandedInteger(N->getOperand(1), RL, RH);
|
|
unsigned OuterBitSize = VT.getSizeInBits();
|
|
unsigned InnerBitSize = NVT.getSizeInBits();
|
|
unsigned LHSSB = DAG.ComputeNumSignBits(N->getOperand(0));
|
|
unsigned RHSSB = DAG.ComputeNumSignBits(N->getOperand(1));
|
|
|
|
APInt HighMask = APInt::getHighBitsSet(OuterBitSize, InnerBitSize);
|
|
if (DAG.MaskedValueIsZero(N->getOperand(0), HighMask) &&
|
|
DAG.MaskedValueIsZero(N->getOperand(1), HighMask)) {
|
|
// The inputs are both zero-extended.
|
|
if (HasUMUL_LOHI) {
|
|
// We can emit a umul_lohi.
|
|
Lo = DAG.getNode(ISD::UMUL_LOHI, dl, DAG.getVTList(NVT, NVT), LL, RL);
|
|
Hi = SDValue(Lo.getNode(), 1);
|
|
return;
|
|
}
|
|
if (HasMULHU) {
|
|
// We can emit a mulhu+mul.
|
|
Lo = DAG.getNode(ISD::MUL, dl, NVT, LL, RL);
|
|
Hi = DAG.getNode(ISD::MULHU, dl, NVT, LL, RL);
|
|
return;
|
|
}
|
|
}
|
|
if (LHSSB > InnerBitSize && RHSSB > InnerBitSize) {
|
|
// The input values are both sign-extended.
|
|
if (HasSMUL_LOHI) {
|
|
// We can emit a smul_lohi.
|
|
Lo = DAG.getNode(ISD::SMUL_LOHI, dl, DAG.getVTList(NVT, NVT), LL, RL);
|
|
Hi = SDValue(Lo.getNode(), 1);
|
|
return;
|
|
}
|
|
if (HasMULHS) {
|
|
// We can emit a mulhs+mul.
|
|
Lo = DAG.getNode(ISD::MUL, dl, NVT, LL, RL);
|
|
Hi = DAG.getNode(ISD::MULHS, dl, NVT, LL, RL);
|
|
return;
|
|
}
|
|
}
|
|
if (HasUMUL_LOHI) {
|
|
// Lo,Hi = umul LHS, RHS.
|
|
SDValue UMulLOHI = DAG.getNode(ISD::UMUL_LOHI, dl,
|
|
DAG.getVTList(NVT, NVT), LL, RL);
|
|
Lo = UMulLOHI;
|
|
Hi = UMulLOHI.getValue(1);
|
|
RH = DAG.getNode(ISD::MUL, dl, NVT, LL, RH);
|
|
LH = DAG.getNode(ISD::MUL, dl, NVT, LH, RL);
|
|
Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, RH);
|
|
Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, LH);
|
|
return;
|
|
}
|
|
if (HasMULHU) {
|
|
Lo = DAG.getNode(ISD::MUL, dl, NVT, LL, RL);
|
|
Hi = DAG.getNode(ISD::MULHU, dl, NVT, LL, RL);
|
|
RH = DAG.getNode(ISD::MUL, dl, NVT, LL, RH);
|
|
LH = DAG.getNode(ISD::MUL, dl, NVT, LH, RL);
|
|
Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, RH);
|
|
Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, LH);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// If nothing else, we can make a libcall.
|
|
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::MUL_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::MUL_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::MUL_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::MUL_I128;
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported MUL!");
|
|
|
|
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
|
|
SplitInteger(MakeLibCall(LC, VT, Ops, 2, true/*irrelevant*/, dl), Lo, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_SDIV(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT VT = N->getValueType(0);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::SDIV_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::SDIV_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::SDIV_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::SDIV_I128;
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SDIV!");
|
|
|
|
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
|
|
SplitInteger(MakeLibCall(LC, VT, Ops, 2, true, dl), Lo, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT VT = N->getValueType(0);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
// If we can emit an efficient shift operation, do so now. Check to see if
|
|
// the RHS is a constant.
|
|
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N->getOperand(1)))
|
|
return ExpandShiftByConstant(N, CN->getZExtValue(), Lo, Hi);
|
|
|
|
// If we can determine that the high bit of the shift is zero or one, even if
|
|
// the low bits are variable, emit this shift in an optimized form.
|
|
if (ExpandShiftWithKnownAmountBit(N, Lo, Hi))
|
|
return;
|
|
|
|
// If this target supports shift_PARTS, use it. First, map to the _PARTS opc.
|
|
unsigned PartsOpc;
|
|
if (N->getOpcode() == ISD::SHL) {
|
|
PartsOpc = ISD::SHL_PARTS;
|
|
} else if (N->getOpcode() == ISD::SRL) {
|
|
PartsOpc = ISD::SRL_PARTS;
|
|
} else {
|
|
assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
|
|
PartsOpc = ISD::SRA_PARTS;
|
|
}
|
|
|
|
// Next check to see if the target supports this SHL_PARTS operation or if it
|
|
// will custom expand it.
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
|
|
TargetLowering::LegalizeAction Action = TLI.getOperationAction(PartsOpc, NVT);
|
|
if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
|
|
Action == TargetLowering::Custom) {
|
|
// Expand the subcomponents.
|
|
SDValue LHSL, LHSH;
|
|
GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
|
|
|
|
SDValue Ops[] = { LHSL, LHSH, N->getOperand(1) };
|
|
EVT VT = LHSL.getValueType();
|
|
Lo = DAG.getNode(PartsOpc, dl, DAG.getVTList(VT, VT), Ops, 3);
|
|
Hi = Lo.getValue(1);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, emit a libcall.
|
|
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
|
|
bool isSigned;
|
|
if (N->getOpcode() == ISD::SHL) {
|
|
isSigned = false; /*sign irrelevant*/
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::SHL_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::SHL_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::SHL_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::SHL_I128;
|
|
} else if (N->getOpcode() == ISD::SRL) {
|
|
isSigned = false;
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::SRL_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::SRL_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::SRL_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::SRL_I128;
|
|
} else {
|
|
assert(N->getOpcode() == ISD::SRA && "Unknown shift!");
|
|
isSigned = true;
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::SRA_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::SRA_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::SRA_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::SRA_I128;
|
|
}
|
|
|
|
if (LC != RTLIB::UNKNOWN_LIBCALL && TLI.getLibcallName(LC)) {
|
|
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
|
|
SplitInteger(MakeLibCall(LC, VT, Ops, 2, isSigned, dl), Lo, Hi);
|
|
return;
|
|
}
|
|
|
|
if (!ExpandShiftWithUnknownAmountBit(N, Lo, Hi))
|
|
llvm_unreachable("Unsupported shift!");
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_SIGN_EXTEND(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
DebugLoc dl = N->getDebugLoc();
|
|
SDValue Op = N->getOperand(0);
|
|
if (Op.getValueType().bitsLE(NVT)) {
|
|
// The low part is sign extension of the input (degenerates to a copy).
|
|
Lo = DAG.getNode(ISD::SIGN_EXTEND, dl, NVT, N->getOperand(0));
|
|
// The high part is obtained by SRA'ing all but one of the bits of low part.
|
|
unsigned LoSize = NVT.getSizeInBits();
|
|
Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
|
|
DAG.getConstant(LoSize-1, TLI.getPointerTy()));
|
|
} else {
|
|
// For example, extension of an i48 to an i64. The operand type necessarily
|
|
// promotes to the result type, so will end up being expanded too.
|
|
assert(getTypeAction(Op.getValueType()) == PromoteInteger &&
|
|
"Only know how to promote this result!");
|
|
SDValue Res = GetPromotedInteger(Op);
|
|
assert(Res.getValueType() == N->getValueType(0) &&
|
|
"Operand over promoted?");
|
|
// Split the promoted operand. This will simplify when it is expanded.
|
|
SplitInteger(Res, Lo, Hi);
|
|
unsigned ExcessBits =
|
|
Op.getValueType().getSizeInBits() - NVT.getSizeInBits();
|
|
Hi = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Hi.getValueType(), Hi,
|
|
DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(), ExcessBits)));
|
|
}
|
|
}
|
|
|
|
void DAGTypeLegalizer::
|
|
ExpandIntRes_SIGN_EXTEND_INREG(SDNode *N, SDValue &Lo, SDValue &Hi) {
|
|
DebugLoc dl = N->getDebugLoc();
|
|
GetExpandedInteger(N->getOperand(0), Lo, Hi);
|
|
EVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
|
|
|
|
if (EVT.bitsLE(Lo.getValueType())) {
|
|
// sext_inreg the low part if needed.
|
|
Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Lo.getValueType(), Lo,
|
|
N->getOperand(1));
|
|
|
|
// The high part gets the sign extension from the lo-part. This handles
|
|
// things like sextinreg V:i64 from i8.
|
|
Hi = DAG.getNode(ISD::SRA, dl, Hi.getValueType(), Lo,
|
|
DAG.getConstant(Hi.getValueType().getSizeInBits()-1,
|
|
TLI.getPointerTy()));
|
|
} else {
|
|
// For example, extension of an i48 to an i64. Leave the low part alone,
|
|
// sext_inreg the high part.
|
|
unsigned ExcessBits =
|
|
EVT.getSizeInBits() - Lo.getValueType().getSizeInBits();
|
|
Hi = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Hi.getValueType(), Hi,
|
|
DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(), ExcessBits)));
|
|
}
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_SREM(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT VT = N->getValueType(0);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::SREM_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::SREM_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::SREM_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::SREM_I128;
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SREM!");
|
|
|
|
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
|
|
SplitInteger(MakeLibCall(LC, VT, Ops, 2, true, dl), Lo, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_TRUNCATE(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
DebugLoc dl = N->getDebugLoc();
|
|
Lo = DAG.getNode(ISD::TRUNCATE, dl, NVT, N->getOperand(0));
|
|
Hi = DAG.getNode(ISD::SRL, dl,
|
|
N->getOperand(0).getValueType(), N->getOperand(0),
|
|
DAG.getConstant(NVT.getSizeInBits(), TLI.getPointerTy()));
|
|
Hi = DAG.getNode(ISD::TRUNCATE, dl, NVT, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_UDIV(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT VT = N->getValueType(0);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::UDIV_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::UDIV_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::UDIV_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::UDIV_I128;
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UDIV!");
|
|
|
|
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
|
|
SplitInteger(MakeLibCall(LC, VT, Ops, 2, false, dl), Lo, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_UREM(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT VT = N->getValueType(0);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
|
|
if (VT == MVT::i16)
|
|
LC = RTLIB::UREM_I16;
|
|
else if (VT == MVT::i32)
|
|
LC = RTLIB::UREM_I32;
|
|
else if (VT == MVT::i64)
|
|
LC = RTLIB::UREM_I64;
|
|
else if (VT == MVT::i128)
|
|
LC = RTLIB::UREM_I128;
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UREM!");
|
|
|
|
SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
|
|
SplitInteger(MakeLibCall(LC, VT, Ops, 2, false, dl), Lo, Hi);
|
|
}
|
|
|
|
void DAGTypeLegalizer::ExpandIntRes_ZERO_EXTEND(SDNode *N,
|
|
SDValue &Lo, SDValue &Hi) {
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
|
|
DebugLoc dl = N->getDebugLoc();
|
|
SDValue Op = N->getOperand(0);
|
|
if (Op.getValueType().bitsLE(NVT)) {
|
|
// The low part is zero extension of the input (degenerates to a copy).
|
|
Lo = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, N->getOperand(0));
|
|
Hi = DAG.getConstant(0, NVT); // The high part is just a zero.
|
|
} else {
|
|
// For example, extension of an i48 to an i64. The operand type necessarily
|
|
// promotes to the result type, so will end up being expanded too.
|
|
assert(getTypeAction(Op.getValueType()) == PromoteInteger &&
|
|
"Only know how to promote this result!");
|
|
SDValue Res = GetPromotedInteger(Op);
|
|
assert(Res.getValueType() == N->getValueType(0) &&
|
|
"Operand over promoted?");
|
|
// Split the promoted operand. This will simplify when it is expanded.
|
|
SplitInteger(Res, Lo, Hi);
|
|
unsigned ExcessBits =
|
|
Op.getValueType().getSizeInBits() - NVT.getSizeInBits();
|
|
Hi = DAG.getZeroExtendInReg(Hi, dl, EVT::getIntegerVT(*DAG.getContext(), ExcessBits));
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Integer Operand Expansion
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// ExpandIntegerOperand - This method is called when the specified operand of
|
|
/// the specified node is found to need expansion. At this point, all of the
|
|
/// result types of the node are known to be legal, but other operands of the
|
|
/// node may need promotion or expansion as well as the specified one.
|
|
bool DAGTypeLegalizer::ExpandIntegerOperand(SDNode *N, unsigned OpNo) {
|
|
DEBUG(dbgs() << "Expand integer operand: "; N->dump(&DAG); dbgs() << "\n");
|
|
SDValue Res = SDValue();
|
|
|
|
if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
|
|
return false;
|
|
|
|
switch (N->getOpcode()) {
|
|
default:
|
|
#ifndef NDEBUG
|
|
dbgs() << "ExpandIntegerOperand Op #" << OpNo << ": ";
|
|
N->dump(&DAG); dbgs() << "\n";
|
|
#endif
|
|
llvm_unreachable("Do not know how to expand this operator's operand!");
|
|
|
|
case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
|
|
case ISD::BR_CC: Res = ExpandIntOp_BR_CC(N); break;
|
|
case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
|
|
case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
|
|
case ISD::INSERT_VECTOR_ELT: Res = ExpandOp_INSERT_VECTOR_ELT(N); break;
|
|
case ISD::SCALAR_TO_VECTOR: Res = ExpandOp_SCALAR_TO_VECTOR(N); break;
|
|
case ISD::SELECT_CC: Res = ExpandIntOp_SELECT_CC(N); break;
|
|
case ISD::SETCC: Res = ExpandIntOp_SETCC(N); break;
|
|
case ISD::SINT_TO_FP: Res = ExpandIntOp_SINT_TO_FP(N); break;
|
|
case ISD::STORE: Res = ExpandIntOp_STORE(cast<StoreSDNode>(N), OpNo); break;
|
|
case ISD::TRUNCATE: Res = ExpandIntOp_TRUNCATE(N); break;
|
|
case ISD::UINT_TO_FP: Res = ExpandIntOp_UINT_TO_FP(N); break;
|
|
|
|
case ISD::SHL:
|
|
case ISD::SRA:
|
|
case ISD::SRL:
|
|
case ISD::ROTL:
|
|
case ISD::ROTR: Res = ExpandIntOp_Shift(N); break;
|
|
case ISD::RETURNADDR:
|
|
case ISD::FRAMEADDR: Res = ExpandIntOp_RETURNADDR(N); break;
|
|
}
|
|
|
|
// If the result is null, the sub-method took care of registering results etc.
|
|
if (!Res.getNode()) return false;
|
|
|
|
// If the result is N, the sub-method updated N in place. Tell the legalizer
|
|
// core about this.
|
|
if (Res.getNode() == N)
|
|
return true;
|
|
|
|
assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
|
|
"Invalid operand expansion");
|
|
|
|
ReplaceValueWith(SDValue(N, 0), Res);
|
|
return false;
|
|
}
|
|
|
|
/// IntegerExpandSetCCOperands - Expand the operands of a comparison. This code
|
|
/// is shared among BR_CC, SELECT_CC, and SETCC handlers.
|
|
void DAGTypeLegalizer::IntegerExpandSetCCOperands(SDValue &NewLHS,
|
|
SDValue &NewRHS,
|
|
ISD::CondCode &CCCode,
|
|
DebugLoc dl) {
|
|
SDValue LHSLo, LHSHi, RHSLo, RHSHi;
|
|
GetExpandedInteger(NewLHS, LHSLo, LHSHi);
|
|
GetExpandedInteger(NewRHS, RHSLo, RHSHi);
|
|
|
|
if (CCCode == ISD::SETEQ || CCCode == ISD::SETNE) {
|
|
if (RHSLo == RHSHi) {
|
|
if (ConstantSDNode *RHSCST = dyn_cast<ConstantSDNode>(RHSLo)) {
|
|
if (RHSCST->isAllOnesValue()) {
|
|
// Equality comparison to -1.
|
|
NewLHS = DAG.getNode(ISD::AND, dl,
|
|
LHSLo.getValueType(), LHSLo, LHSHi);
|
|
NewRHS = RHSLo;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
NewLHS = DAG.getNode(ISD::XOR, dl, LHSLo.getValueType(), LHSLo, RHSLo);
|
|
NewRHS = DAG.getNode(ISD::XOR, dl, LHSLo.getValueType(), LHSHi, RHSHi);
|
|
NewLHS = DAG.getNode(ISD::OR, dl, NewLHS.getValueType(), NewLHS, NewRHS);
|
|
NewRHS = DAG.getConstant(0, NewLHS.getValueType());
|
|
return;
|
|
}
|
|
|
|
// If this is a comparison of the sign bit, just look at the top part.
|
|
// X > -1, x < 0
|
|
if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(NewRHS))
|
|
if ((CCCode == ISD::SETLT && CST->isNullValue()) || // X < 0
|
|
(CCCode == ISD::SETGT && CST->isAllOnesValue())) { // X > -1
|
|
NewLHS = LHSHi;
|
|
NewRHS = RHSHi;
|
|
return;
|
|
}
|
|
|
|
// FIXME: This generated code sucks.
|
|
ISD::CondCode LowCC;
|
|
switch (CCCode) {
|
|
default: llvm_unreachable("Unknown integer setcc!");
|
|
case ISD::SETLT:
|
|
case ISD::SETULT: LowCC = ISD::SETULT; break;
|
|
case ISD::SETGT:
|
|
case ISD::SETUGT: LowCC = ISD::SETUGT; break;
|
|
case ISD::SETLE:
|
|
case ISD::SETULE: LowCC = ISD::SETULE; break;
|
|
case ISD::SETGE:
|
|
case ISD::SETUGE: LowCC = ISD::SETUGE; break;
|
|
}
|
|
|
|
// Tmp1 = lo(op1) < lo(op2) // Always unsigned comparison
|
|
// Tmp2 = hi(op1) < hi(op2) // Signedness depends on operands
|
|
// dest = hi(op1) == hi(op2) ? Tmp1 : Tmp2;
|
|
|
|
// NOTE: on targets without efficient SELECT of bools, we can always use
|
|
// this identity: (B1 ? B2 : B3) --> (B1 & B2)|(!B1&B3)
|
|
TargetLowering::DAGCombinerInfo DagCombineInfo(DAG, false, true, true, NULL);
|
|
SDValue Tmp1, Tmp2;
|
|
Tmp1 = TLI.SimplifySetCC(TLI.getSetCCResultType(LHSLo.getValueType()),
|
|
LHSLo, RHSLo, LowCC, false, DagCombineInfo, dl);
|
|
if (!Tmp1.getNode())
|
|
Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
|
|
LHSLo, RHSLo, LowCC);
|
|
Tmp2 = TLI.SimplifySetCC(TLI.getSetCCResultType(LHSHi.getValueType()),
|
|
LHSHi, RHSHi, CCCode, false, DagCombineInfo, dl);
|
|
if (!Tmp2.getNode())
|
|
Tmp2 = DAG.getNode(ISD::SETCC, dl,
|
|
TLI.getSetCCResultType(LHSHi.getValueType()),
|
|
LHSHi, RHSHi, DAG.getCondCode(CCCode));
|
|
|
|
ConstantSDNode *Tmp1C = dyn_cast<ConstantSDNode>(Tmp1.getNode());
|
|
ConstantSDNode *Tmp2C = dyn_cast<ConstantSDNode>(Tmp2.getNode());
|
|
if ((Tmp1C && Tmp1C->isNullValue()) ||
|
|
(Tmp2C && Tmp2C->isNullValue() &&
|
|
(CCCode == ISD::SETLE || CCCode == ISD::SETGE ||
|
|
CCCode == ISD::SETUGE || CCCode == ISD::SETULE)) ||
|
|
(Tmp2C && Tmp2C->getAPIntValue() == 1 &&
|
|
(CCCode == ISD::SETLT || CCCode == ISD::SETGT ||
|
|
CCCode == ISD::SETUGT || CCCode == ISD::SETULT))) {
|
|
// low part is known false, returns high part.
|
|
// For LE / GE, if high part is known false, ignore the low part.
|
|
// For LT / GT, if high part is known true, ignore the low part.
|
|
NewLHS = Tmp2;
|
|
NewRHS = SDValue();
|
|
return;
|
|
}
|
|
|
|
NewLHS = TLI.SimplifySetCC(TLI.getSetCCResultType(LHSHi.getValueType()),
|
|
LHSHi, RHSHi, ISD::SETEQ, false,
|
|
DagCombineInfo, dl);
|
|
if (!NewLHS.getNode())
|
|
NewLHS = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
|
|
LHSHi, RHSHi, ISD::SETEQ);
|
|
NewLHS = DAG.getNode(ISD::SELECT, dl, Tmp1.getValueType(),
|
|
NewLHS, Tmp1, Tmp2);
|
|
NewRHS = SDValue();
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_BR_CC(SDNode *N) {
|
|
SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
|
|
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
|
|
IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
|
|
|
|
// If ExpandSetCCOperands returned a scalar, we need to compare the result
|
|
// against zero to select between true and false values.
|
|
if (NewRHS.getNode() == 0) {
|
|
NewRHS = DAG.getConstant(0, NewLHS.getValueType());
|
|
CCCode = ISD::SETNE;
|
|
}
|
|
|
|
// Update N to have the operands specified.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
|
|
DAG.getCondCode(CCCode), NewLHS, NewRHS,
|
|
N->getOperand(4));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_SELECT_CC(SDNode *N) {
|
|
SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
|
|
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
|
|
IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
|
|
|
|
// If ExpandSetCCOperands returned a scalar, we need to compare the result
|
|
// against zero to select between true and false values.
|
|
if (NewRHS.getNode() == 0) {
|
|
NewRHS = DAG.getConstant(0, NewLHS.getValueType());
|
|
CCCode = ISD::SETNE;
|
|
}
|
|
|
|
// Update N to have the operands specified.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
|
|
N->getOperand(2), N->getOperand(3),
|
|
DAG.getCondCode(CCCode));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_SETCC(SDNode *N) {
|
|
SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
|
|
ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
|
|
IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
|
|
|
|
// If ExpandSetCCOperands returned a scalar, use it.
|
|
if (NewRHS.getNode() == 0) {
|
|
assert(NewLHS.getValueType() == N->getValueType(0) &&
|
|
"Unexpected setcc expansion!");
|
|
return NewLHS;
|
|
}
|
|
|
|
// Otherwise, update N to have the operands specified.
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
|
|
DAG.getCondCode(CCCode));
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_Shift(SDNode *N) {
|
|
// The value being shifted is legal, but the shift amount is too big.
|
|
// It follows that either the result of the shift is undefined, or the
|
|
// upper half of the shift amount is zero. Just use the lower half.
|
|
SDValue Lo, Hi;
|
|
GetExpandedInteger(N->getOperand(1), Lo, Hi);
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0), Lo);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_RETURNADDR(SDNode *N) {
|
|
// The argument of RETURNADDR / FRAMEADDR builtin is 32 bit contant. This
|
|
// surely makes pretty nice problems on 8/16 bit targets. Just truncate this
|
|
// constant to valid type.
|
|
SDValue Lo, Hi;
|
|
GetExpandedInteger(N->getOperand(0), Lo, Hi);
|
|
return DAG.UpdateNodeOperands(SDValue(N, 0), Lo);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_SINT_TO_FP(SDNode *N) {
|
|
SDValue Op = N->getOperand(0);
|
|
EVT DstVT = N->getValueType(0);
|
|
RTLIB::Libcall LC = RTLIB::getSINTTOFP(Op.getValueType(), DstVT);
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL &&
|
|
"Don't know how to expand this SINT_TO_FP!");
|
|
return MakeLibCall(LC, DstVT, &Op, 1, true, N->getDebugLoc());
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo) {
|
|
if (ISD::isNormalStore(N))
|
|
return ExpandOp_NormalStore(N, OpNo);
|
|
|
|
assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
|
|
assert(OpNo == 1 && "Can only expand the stored value so far");
|
|
|
|
EVT VT = N->getOperand(1).getValueType();
|
|
EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
|
|
SDValue Ch = N->getChain();
|
|
SDValue Ptr = N->getBasePtr();
|
|
int SVOffset = N->getSrcValueOffset();
|
|
unsigned Alignment = N->getAlignment();
|
|
bool isVolatile = N->isVolatile();
|
|
DebugLoc dl = N->getDebugLoc();
|
|
SDValue Lo, Hi;
|
|
|
|
assert(NVT.isByteSized() && "Expanded type not byte sized!");
|
|
|
|
if (N->getMemoryVT().bitsLE(NVT)) {
|
|
GetExpandedInteger(N->getValue(), Lo, Hi);
|
|
return DAG.getTruncStore(Ch, dl, Lo, Ptr, N->getSrcValue(), SVOffset,
|
|
N->getMemoryVT(), isVolatile, Alignment);
|
|
} else if (TLI.isLittleEndian()) {
|
|
// Little-endian - low bits are at low addresses.
|
|
GetExpandedInteger(N->getValue(), Lo, Hi);
|
|
|
|
Lo = DAG.getStore(Ch, dl, Lo, Ptr, N->getSrcValue(), SVOffset,
|
|
isVolatile, Alignment);
|
|
|
|
unsigned ExcessBits =
|
|
N->getMemoryVT().getSizeInBits() - NVT.getSizeInBits();
|
|
EVT NEVT = EVT::getIntegerVT(*DAG.getContext(), ExcessBits);
|
|
|
|
// Increment the pointer to the other half.
|
|
unsigned IncrementSize = NVT.getSizeInBits()/8;
|
|
Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
|
|
DAG.getIntPtrConstant(IncrementSize));
|
|
Hi = DAG.getTruncStore(Ch, dl, Hi, Ptr, N->getSrcValue(),
|
|
SVOffset+IncrementSize, NEVT,
|
|
isVolatile, MinAlign(Alignment, IncrementSize));
|
|
return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi);
|
|
} else {
|
|
// Big-endian - high bits are at low addresses. Favor aligned stores at
|
|
// the cost of some bit-fiddling.
|
|
GetExpandedInteger(N->getValue(), Lo, Hi);
|
|
|
|
EVT ExtVT = N->getMemoryVT();
|
|
unsigned EBytes = ExtVT.getStoreSize();
|
|
unsigned IncrementSize = NVT.getSizeInBits()/8;
|
|
unsigned ExcessBits = (EBytes - IncrementSize)*8;
|
|
EVT HiVT = EVT::getIntegerVT(*DAG.getContext(), ExtVT.getSizeInBits() - ExcessBits);
|
|
|
|
if (ExcessBits < NVT.getSizeInBits()) {
|
|
// Transfer high bits from the top of Lo to the bottom of Hi.
|
|
Hi = DAG.getNode(ISD::SHL, dl, NVT, Hi,
|
|
DAG.getConstant(NVT.getSizeInBits() - ExcessBits,
|
|
TLI.getPointerTy()));
|
|
Hi = DAG.getNode(ISD::OR, dl, NVT, Hi,
|
|
DAG.getNode(ISD::SRL, dl, NVT, Lo,
|
|
DAG.getConstant(ExcessBits,
|
|
TLI.getPointerTy())));
|
|
}
|
|
|
|
// Store both the high bits and maybe some of the low bits.
|
|
Hi = DAG.getTruncStore(Ch, dl, Hi, Ptr, N->getSrcValue(),
|
|
SVOffset, HiVT, isVolatile, Alignment);
|
|
|
|
// Increment the pointer to the other half.
|
|
Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
|
|
DAG.getIntPtrConstant(IncrementSize));
|
|
// Store the lowest ExcessBits bits in the second half.
|
|
Lo = DAG.getTruncStore(Ch, dl, Lo, Ptr, N->getSrcValue(),
|
|
SVOffset+IncrementSize,
|
|
EVT::getIntegerVT(*DAG.getContext(), ExcessBits),
|
|
isVolatile, MinAlign(Alignment, IncrementSize));
|
|
return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi);
|
|
}
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_TRUNCATE(SDNode *N) {
|
|
SDValue InL, InH;
|
|
GetExpandedInteger(N->getOperand(0), InL, InH);
|
|
// Just truncate the low part of the source.
|
|
return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), N->getValueType(0), InL);
|
|
}
|
|
|
|
SDValue DAGTypeLegalizer::ExpandIntOp_UINT_TO_FP(SDNode *N) {
|
|
SDValue Op = N->getOperand(0);
|
|
EVT SrcVT = Op.getValueType();
|
|
EVT DstVT = N->getValueType(0);
|
|
DebugLoc dl = N->getDebugLoc();
|
|
|
|
if (TLI.getOperationAction(ISD::SINT_TO_FP, SrcVT) == TargetLowering::Custom){
|
|
// Do a signed conversion then adjust the result.
|
|
SDValue SignedConv = DAG.getNode(ISD::SINT_TO_FP, dl, DstVT, Op);
|
|
SignedConv = TLI.LowerOperation(SignedConv, DAG);
|
|
|
|
// The result of the signed conversion needs adjusting if the 'sign bit' of
|
|
// the incoming integer was set. To handle this, we dynamically test to see
|
|
// if it is set, and, if so, add a fudge factor.
|
|
|
|
const uint64_t F32TwoE32 = 0x4F800000ULL;
|
|
const uint64_t F32TwoE64 = 0x5F800000ULL;
|
|
const uint64_t F32TwoE128 = 0x7F800000ULL;
|
|
|
|
APInt FF(32, 0);
|
|
if (SrcVT == MVT::i32)
|
|
FF = APInt(32, F32TwoE32);
|
|
else if (SrcVT == MVT::i64)
|
|
FF = APInt(32, F32TwoE64);
|
|
else if (SrcVT == MVT::i128)
|
|
FF = APInt(32, F32TwoE128);
|
|
else
|
|
assert(false && "Unsupported UINT_TO_FP!");
|
|
|
|
// Check whether the sign bit is set.
|
|
SDValue Lo, Hi;
|
|
GetExpandedInteger(Op, Lo, Hi);
|
|
SDValue SignSet = DAG.getSetCC(dl,
|
|
TLI.getSetCCResultType(Hi.getValueType()),
|
|
Hi, DAG.getConstant(0, Hi.getValueType()),
|
|
ISD::SETLT);
|
|
|
|
// Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
|
|
SDValue FudgePtr = DAG.getConstantPool(
|
|
ConstantInt::get(*DAG.getContext(), FF.zext(64)),
|
|
TLI.getPointerTy());
|
|
|
|
// Get a pointer to FF if the sign bit was set, or to 0 otherwise.
|
|
SDValue Zero = DAG.getIntPtrConstant(0);
|
|
SDValue Four = DAG.getIntPtrConstant(4);
|
|
if (TLI.isBigEndian()) std::swap(Zero, Four);
|
|
SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
|
|
Zero, Four);
|
|
unsigned Alignment = cast<ConstantPoolSDNode>(FudgePtr)->getAlignment();
|
|
FudgePtr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(), FudgePtr, Offset);
|
|
Alignment = std::min(Alignment, 4u);
|
|
|
|
// Load the value out, extending it from f32 to the destination float type.
|
|
// FIXME: Avoid the extend by constructing the right constant pool?
|
|
SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, DstVT, DAG.getEntryNode(),
|
|
FudgePtr, NULL, 0, MVT::f32,
|
|
false, Alignment);
|
|
return DAG.getNode(ISD::FADD, dl, DstVT, SignedConv, Fudge);
|
|
}
|
|
|
|
// Otherwise, use a libcall.
|
|
RTLIB::Libcall LC = RTLIB::getUINTTOFP(SrcVT, DstVT);
|
|
assert(LC != RTLIB::UNKNOWN_LIBCALL &&
|
|
"Don't know how to expand this UINT_TO_FP!");
|
|
return MakeLibCall(LC, DstVT, &Op, 1, true, dl);
|
|
}
|