diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/FastISel.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 0c1ac69..e5ea6e6 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -40,6 +40,7 @@ //===----------------------------------------------------------------------===// #define DEBUG_TYPE "isel" +#include "llvm/DebugInfo.h" #include "llvm/Function.h" #include "llvm/GlobalVariable.h" #include "llvm/Instructions.h" @@ -51,7 +52,6 @@ #include "llvm/CodeGen/MachineInstrBuilder.h" #include "llvm/CodeGen/MachineModuleInfo.h" #include "llvm/CodeGen/MachineRegisterInfo.h" -#include "llvm/Analysis/DebugInfo.h" #include "llvm/Analysis/Loads.h" #include "llvm/Target/TargetData.h" #include "llvm/Target/TargetInstrInfo.h" @@ -484,7 +484,7 @@ bool FastISel::SelectGetElementPtr(const User *I) { if (const ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { if (CI->isZero()) continue; // N = N + Offset - TotalOffs += + TotalOffs += TD.getTypeAllocSize(Ty)*cast<ConstantInt>(CI)->getSExtValue(); if (TotalOffs >= MaxOffs) { N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, TotalOffs, VT); @@ -573,7 +573,10 @@ bool FastISel::SelectCall(const User *I) { // At -O0 we don't care about the lifetime intrinsics. case Intrinsic::lifetime_start: case Intrinsic::lifetime_end: + // The donothing intrinsic does, well, nothing. + case Intrinsic::donothing: return true; + case Intrinsic::dbg_declare: { const DbgDeclareInst *DI = cast<DbgDeclareInst>(Call); if (!DIVariable(DI->getVariable()).Verify() || @@ -642,7 +645,7 @@ bool FastISel::SelectCall(const User *I) { BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) .addCImm(CI).addImm(DI->getOffset()) .addMetadata(DI->getVariable()); - else + else BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) .addImm(CI->getZExtValue()).addImm(DI->getOffset()) .addMetadata(DI->getVariable()); @@ -792,7 +795,7 @@ FastISel::SelectInstruction(const Instruction *I) { DL = DebugLoc(); return true; } - // Remove dead code. However, ignore call instructions since we've flushed + // Remove dead code. However, ignore call instructions since we've flushed // the local value map and recomputed the insert point. if (!isa<CallInst>(I)) { recomputeInsertPt(); @@ -1306,6 +1309,30 @@ unsigned FastISel::FastEmitInst_rri(unsigned MachineInstOpcode, return ResultReg; } +unsigned FastISel::FastEmitInst_rrii(unsigned MachineInstOpcode, + const TargetRegisterClass *RC, + unsigned Op0, bool Op0IsKill, + unsigned Op1, bool Op1IsKill, + uint64_t Imm1, uint64_t Imm2) { + unsigned ResultReg = createResultReg(RC); + const MCInstrDesc &II = TII.get(MachineInstOpcode); + + if (II.getNumDefs() >= 1) + BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) + .addReg(Op0, Op0IsKill * RegState::Kill) + .addReg(Op1, Op1IsKill * RegState::Kill) + .addImm(Imm1).addImm(Imm2); + else { + BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) + .addReg(Op0, Op0IsKill * RegState::Kill) + .addReg(Op1, Op1IsKill * RegState::Kill) + .addImm(Imm1).addImm(Imm2); + BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), + ResultReg).addReg(II.ImplicitDefs[0]); + } + return ResultReg; +} + unsigned FastISel::FastEmitInst_i(unsigned MachineInstOpcode, const TargetRegisterClass *RC, uint64_t Imm) { @@ -1345,6 +1372,8 @@ unsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT, unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT)); assert(TargetRegisterInfo::isVirtualRegister(Op0) && "Cannot yet extract from physregs"); + const TargetRegisterClass *RC = MRI.getRegClass(Op0); + MRI.constrainRegClass(Op0, TRI.getSubClassWithSubReg(RC, Idx)); BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), ResultReg) .addReg(Op0, getKillRegState(Op0IsKill), Idx); |