mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-17 21:29:20 +00:00
Minor cleanups and shrinkification.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48658 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
parent
f1d3d666c1
commit
88365bb404
@ -198,147 +198,82 @@ template <> struct DenseMapInfo<Expression> {
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//===----------------------------------------------------------------------===//
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// ValueTable Internal Functions
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//===----------------------------------------------------------------------===//
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Expression::ExpressionOpcode
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ValueTable::getOpcode(BinaryOperator* BO) {
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Expression::ExpressionOpcode ValueTable::getOpcode(BinaryOperator* BO) {
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switch(BO->getOpcode()) {
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case Instruction::Add:
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return Expression::ADD;
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case Instruction::Sub:
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return Expression::SUB;
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case Instruction::Mul:
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return Expression::MUL;
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case Instruction::UDiv:
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return Expression::UDIV;
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case Instruction::SDiv:
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return Expression::SDIV;
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case Instruction::FDiv:
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return Expression::FDIV;
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case Instruction::URem:
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return Expression::UREM;
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case Instruction::SRem:
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return Expression::SREM;
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case Instruction::FRem:
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return Expression::FREM;
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case Instruction::Shl:
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return Expression::SHL;
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case Instruction::LShr:
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return Expression::LSHR;
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case Instruction::AShr:
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return Expression::ASHR;
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case Instruction::And:
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return Expression::AND;
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case Instruction::Or:
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return Expression::OR;
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case Instruction::Xor:
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return Expression::XOR;
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// THIS SHOULD NEVER HAPPEN
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default:
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assert(0 && "Binary operator with unknown opcode?");
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return Expression::ADD;
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default: // THIS SHOULD NEVER HAPPEN
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assert(0 && "Binary operator with unknown opcode?");
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case Instruction::Add: return Expression::ADD;
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case Instruction::Sub: return Expression::SUB;
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case Instruction::Mul: return Expression::MUL;
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case Instruction::UDiv: return Expression::UDIV;
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case Instruction::SDiv: return Expression::SDIV;
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case Instruction::FDiv: return Expression::FDIV;
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case Instruction::URem: return Expression::UREM;
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case Instruction::SRem: return Expression::SREM;
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case Instruction::FRem: return Expression::FREM;
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case Instruction::Shl: return Expression::SHL;
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case Instruction::LShr: return Expression::LSHR;
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case Instruction::AShr: return Expression::ASHR;
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case Instruction::And: return Expression::AND;
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case Instruction::Or: return Expression::OR;
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case Instruction::Xor: return Expression::XOR;
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}
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}
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Expression::ExpressionOpcode ValueTable::getOpcode(CmpInst* C) {
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if (C->getOpcode() == Instruction::ICmp) {
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if (isa<ICmpInst>(C)) {
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switch (C->getPredicate()) {
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case ICmpInst::ICMP_EQ:
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return Expression::ICMPEQ;
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case ICmpInst::ICMP_NE:
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return Expression::ICMPNE;
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case ICmpInst::ICMP_UGT:
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return Expression::ICMPUGT;
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case ICmpInst::ICMP_UGE:
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return Expression::ICMPUGE;
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case ICmpInst::ICMP_ULT:
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return Expression::ICMPULT;
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case ICmpInst::ICMP_ULE:
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return Expression::ICMPULE;
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case ICmpInst::ICMP_SGT:
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return Expression::ICMPSGT;
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case ICmpInst::ICMP_SGE:
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return Expression::ICMPSGE;
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case ICmpInst::ICMP_SLT:
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return Expression::ICMPSLT;
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case ICmpInst::ICMP_SLE:
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return Expression::ICMPSLE;
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// THIS SHOULD NEVER HAPPEN
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default:
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assert(0 && "Comparison with unknown predicate?");
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return Expression::ICMPEQ;
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}
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} else {
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switch (C->getPredicate()) {
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case FCmpInst::FCMP_OEQ:
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return Expression::FCMPOEQ;
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case FCmpInst::FCMP_OGT:
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return Expression::FCMPOGT;
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case FCmpInst::FCMP_OGE:
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return Expression::FCMPOGE;
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case FCmpInst::FCMP_OLT:
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return Expression::FCMPOLT;
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case FCmpInst::FCMP_OLE:
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return Expression::FCMPOLE;
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case FCmpInst::FCMP_ONE:
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return Expression::FCMPONE;
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case FCmpInst::FCMP_ORD:
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return Expression::FCMPORD;
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case FCmpInst::FCMP_UNO:
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return Expression::FCMPUNO;
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case FCmpInst::FCMP_UEQ:
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return Expression::FCMPUEQ;
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case FCmpInst::FCMP_UGT:
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return Expression::FCMPUGT;
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case FCmpInst::FCMP_UGE:
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return Expression::FCMPUGE;
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case FCmpInst::FCMP_ULT:
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return Expression::FCMPULT;
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case FCmpInst::FCMP_ULE:
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return Expression::FCMPULE;
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case FCmpInst::FCMP_UNE:
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return Expression::FCMPUNE;
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// THIS SHOULD NEVER HAPPEN
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default:
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assert(0 && "Comparison with unknown predicate?");
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return Expression::FCMPOEQ;
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default: // THIS SHOULD NEVER HAPPEN
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assert(0 && "Comparison with unknown predicate?");
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case ICmpInst::ICMP_EQ: return Expression::ICMPEQ;
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case ICmpInst::ICMP_NE: return Expression::ICMPNE;
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case ICmpInst::ICMP_UGT: return Expression::ICMPUGT;
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case ICmpInst::ICMP_UGE: return Expression::ICMPUGE;
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case ICmpInst::ICMP_ULT: return Expression::ICMPULT;
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case ICmpInst::ICMP_ULE: return Expression::ICMPULE;
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case ICmpInst::ICMP_SGT: return Expression::ICMPSGT;
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case ICmpInst::ICMP_SGE: return Expression::ICMPSGE;
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case ICmpInst::ICMP_SLT: return Expression::ICMPSLT;
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case ICmpInst::ICMP_SLE: return Expression::ICMPSLE;
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}
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}
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assert(isa<FCmpInst>(C) && "Unknown compare");
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switch (C->getPredicate()) {
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default: // THIS SHOULD NEVER HAPPEN
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assert(0 && "Comparison with unknown predicate?");
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case FCmpInst::FCMP_OEQ: return Expression::FCMPOEQ;
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case FCmpInst::FCMP_OGT: return Expression::FCMPOGT;
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case FCmpInst::FCMP_OGE: return Expression::FCMPOGE;
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case FCmpInst::FCMP_OLT: return Expression::FCMPOLT;
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case FCmpInst::FCMP_OLE: return Expression::FCMPOLE;
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case FCmpInst::FCMP_ONE: return Expression::FCMPONE;
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case FCmpInst::FCMP_ORD: return Expression::FCMPORD;
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case FCmpInst::FCMP_UNO: return Expression::FCMPUNO;
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case FCmpInst::FCMP_UEQ: return Expression::FCMPUEQ;
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case FCmpInst::FCMP_UGT: return Expression::FCMPUGT;
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case FCmpInst::FCMP_UGE: return Expression::FCMPUGE;
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case FCmpInst::FCMP_ULT: return Expression::FCMPULT;
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case FCmpInst::FCMP_ULE: return Expression::FCMPULE;
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case FCmpInst::FCMP_UNE: return Expression::FCMPUNE;
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}
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}
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Expression::ExpressionOpcode
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ValueTable::getOpcode(CastInst* C) {
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Expression::ExpressionOpcode ValueTable::getOpcode(CastInst* C) {
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switch(C->getOpcode()) {
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case Instruction::Trunc:
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return Expression::TRUNC;
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case Instruction::ZExt:
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return Expression::ZEXT;
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case Instruction::SExt:
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return Expression::SEXT;
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case Instruction::FPToUI:
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return Expression::FPTOUI;
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case Instruction::FPToSI:
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return Expression::FPTOSI;
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case Instruction::UIToFP:
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return Expression::UITOFP;
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case Instruction::SIToFP:
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return Expression::SITOFP;
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case Instruction::FPTrunc:
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return Expression::FPTRUNC;
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case Instruction::FPExt:
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return Expression::FPEXT;
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case Instruction::PtrToInt:
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return Expression::PTRTOINT;
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case Instruction::IntToPtr:
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return Expression::INTTOPTR;
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case Instruction::BitCast:
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return Expression::BITCAST;
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// THIS SHOULD NEVER HAPPEN
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default:
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assert(0 && "Cast operator with unknown opcode?");
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return Expression::BITCAST;
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default: // THIS SHOULD NEVER HAPPEN
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assert(0 && "Cast operator with unknown opcode?");
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case Instruction::Trunc: return Expression::TRUNC;
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case Instruction::ZExt: return Expression::ZEXT;
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case Instruction::SExt: return Expression::SEXT;
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case Instruction::FPToUI: return Expression::FPTOUI;
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case Instruction::FPToSI: return Expression::FPTOSI;
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case Instruction::UIToFP: return Expression::UITOFP;
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case Instruction::SIToFP: return Expression::SITOFP;
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case Instruction::FPTrunc: return Expression::FPTRUNC;
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case Instruction::FPExt: return Expression::FPEXT;
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case Instruction::PtrToInt: return Expression::PTRTOINT;
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case Instruction::IntToPtr: return Expression::INTTOPTR;
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case Instruction::BitCast: return Expression::BITCAST;
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}
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}
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@ -618,12 +553,8 @@ uint32_t ValueTable::lookup_or_add(Value* V) {
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/// the value has not yet been numbered.
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uint32_t ValueTable::lookup(Value* V) const {
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DenseMap<Value*, uint32_t>::iterator VI = valueNumbering.find(V);
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if (VI != valueNumbering.end())
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return VI->second;
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else
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assert(0 && "Value not numbered?");
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return 0;
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assert(VI != valueNumbering.end() && "Value not numbered?");
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return VI->second;
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}
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/// clear - Remove all entries from the ValueTable
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@ -642,7 +573,7 @@ void ValueTable::erase(Value* V) {
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// ValueNumberedSet Class
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//===----------------------------------------------------------------------===//
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namespace {
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class ValueNumberedSet {
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class VISIBILITY_HIDDEN ValueNumberedSet {
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private:
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SmallPtrSet<Value*, 8> contents;
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BitVector numbers;
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@ -755,7 +686,6 @@ namespace {
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};
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char GVN::ID = 0;
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}
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// createGVNPass - The public interface to this file...
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@ -807,16 +737,15 @@ Value* GVN::CollapsePhi(PHINode* p) {
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DominatorTree &DT = getAnalysis<DominatorTree>();
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Value* constVal = p->hasConstantValue();
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if (constVal) {
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if (Instruction* inst = dyn_cast<Instruction>(constVal)) {
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if (DT.dominates(inst, p))
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if (isSafeReplacement(p, inst))
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return inst;
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} else {
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return constVal;
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}
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}
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if (!constVal) return 0;
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Instruction* inst = dyn_cast<Instruction>(constVal);
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if (!inst)
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return constVal;
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if (DT.dominates(inst, p))
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if (isSafeReplacement(p, inst))
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return inst;
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return 0;
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}
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@ -836,8 +765,8 @@ bool GVN::isSafeReplacement(PHINode* p, Instruction* inst) {
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/// GetValueForBlock - Get the value to use within the specified basic block.
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/// available values are in Phis.
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Value *GVN::GetValueForBlock(BasicBlock *BB, LoadInst* orig,
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DenseMap<BasicBlock*, Value*> &Phis,
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bool top_level) {
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DenseMap<BasicBlock*, Value*> &Phis,
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bool top_level) {
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// If we have already computed this value, return the previously computed val.
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DenseMap<BasicBlock*, Value*>::iterator V = Phis.find(BB);
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@ -849,6 +778,7 @@ Value *GVN::GetValueForBlock(BasicBlock *BB, LoadInst* orig,
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Phis[BB] = ret;
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return ret;
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}
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// Otherwise, the idom is the loop, so we need to insert a PHI node. Do so
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// now, then get values to fill in the incoming values for the PHI.
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PHINode *PN = new PHINode(orig->getType(), orig->getName()+".rle",
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@ -861,35 +791,34 @@ Value *GVN::GetValueForBlock(BasicBlock *BB, LoadInst* orig,
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// Fill in the incoming values for the block.
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for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI) {
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Value* val = GetValueForBlock(*PI, orig, Phis);
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PN->addIncoming(val, *PI);
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}
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AliasAnalysis& AA = getAnalysis<AliasAnalysis>();
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AA.copyValue(orig, PN);
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// Attempt to collapse PHI nodes that are trivially redundant
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Value* v = CollapsePhi(PN);
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if (v) {
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MemoryDependenceAnalysis& MD = getAnalysis<MemoryDependenceAnalysis>();
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MD.removeInstruction(PN);
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PN->replaceAllUsesWith(v);
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for (DenseMap<BasicBlock*, Value*>::iterator I = Phis.begin(),
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E = Phis.end(); I != E; ++I)
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if (I->second == PN)
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I->second = v;
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PN->eraseFromParent();
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Phis[BB] = v;
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return v;
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if (!v) {
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// Cache our phi construction results
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phiMap[orig->getPointerOperand()].insert(PN);
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return PN;
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}
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MemoryDependenceAnalysis& MD = getAnalysis<MemoryDependenceAnalysis>();
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// Cache our phi construction results
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phiMap[orig->getPointerOperand()].insert(PN);
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return PN;
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MD.removeInstruction(PN);
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PN->replaceAllUsesWith(v);
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for (DenseMap<BasicBlock*, Value*>::iterator I = Phis.begin(),
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E = Phis.end(); I != E; ++I)
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if (I->second == PN)
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I->second = v;
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PN->eraseFromParent();
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Phis[BB] = v;
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return v;
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}
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/// processNonLocalLoad - Attempt to eliminate a load whose dependencies are
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@ -906,24 +835,25 @@ bool GVN::processNonLocalLoad(LoadInst* L,
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// Filter out useless results (non-locals, etc)
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for (DenseMap<BasicBlock*, Value*>::iterator I = deps.begin(), E = deps.end();
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I != E; ++I)
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if (I->second == MemoryDependenceAnalysis::None) {
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I != E; ++I) {
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if (I->second == MemoryDependenceAnalysis::None)
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return false;
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} else if (I->second == MemoryDependenceAnalysis::NonLocal) {
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if (I->second == MemoryDependenceAnalysis::NonLocal)
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continue;
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} else if (StoreInst* S = dyn_cast<StoreInst>(I->second)) {
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if (S->getPointerOperand() == L->getPointerOperand())
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repl[I->first] = S->getOperand(0);
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else
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if (StoreInst* S = dyn_cast<StoreInst>(I->second)) {
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if (S->getPointerOperand() != L->getPointerOperand())
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return false;
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repl[I->first] = S->getOperand(0);
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} else if (LoadInst* LD = dyn_cast<LoadInst>(I->second)) {
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if (LD->getPointerOperand() == L->getPointerOperand())
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repl[I->first] = LD;
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else
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if (LD->getPointerOperand() != L->getPointerOperand())
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return false;
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repl[I->first] = LD;
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} else {
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return false;
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}
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}
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// Use cached PHI construction information from previous runs
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SmallPtrSet<Instruction*, 4>& p = phiMap[L->getPointerOperand()];
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@ -934,11 +864,10 @@ bool GVN::processNonLocalLoad(LoadInst* L,
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L->replaceAllUsesWith(*I);
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toErase.push_back(L);
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NumGVNLoad++;
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return true;
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} else {
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repl.insert(std::make_pair((*I)->getParent(), *I));
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}
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repl.insert(std::make_pair((*I)->getParent(), *I));
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}
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// Perform PHI construction
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@ -1245,11 +1174,11 @@ bool GVN::processMemCpy(MemCpyInst* M, MemCpyInst* MDep,
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MD.dropInstruction(M);
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toErase.push_back(M);
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return true;
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} else {
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MD.removeInstruction(C);
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toErase.push_back(C);
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return false;
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}
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MD.removeInstruction(C);
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toErase.push_back(C);
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return false;
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}
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/// processInstruction - When calculating availability, handle an instruction
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@ -1384,9 +1313,8 @@ bool GVN::iterateOnFunction(Function &F) {
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++BI;
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for (SmallVector<Instruction*, 4>::iterator I = toErase.begin(),
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E = toErase.end(); I != E; ++I) {
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E = toErase.end(); I != E; ++I)
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(*I)->eraseFromParent();
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}
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toErase.clear();
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}
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