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Use COPY for extracting ImplicitDef'ed values from fast-isel instructions. 

This assumes that the registers can be copied which is probably a safe
assumption.

llvm-svn: 108070
This commit is contained in:
Jakob Stoklund Olesen 2010-07-11 03:31:05 +00:00
parent 3bb1267431
commit 7147ab9e78
1 changed files with 12 additions and 30 deletions
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42
llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -1077,11 +1077,8 @@ unsigned FastISel::FastEmitInst_r(unsigned MachineInstOpcode,
else {
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
.addReg(Op0, Op0IsKill * RegState::Kill);
bool InsertedCopy = TII.copyRegToReg(*FuncInfo.MBB, FuncInfo.InsertPt,
ResultReg, II.ImplicitDefs[0],
RC, RC, DL);
if (!InsertedCopy)
ResultReg = 0;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(II.ImplicitDefs[0]);
}
return ResultReg;
@ -1102,11 +1099,8 @@ unsigned FastISel::FastEmitInst_rr(unsigned MachineInstOpcode,
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
.addReg(Op0, Op0IsKill * RegState::Kill)
.addReg(Op1, Op1IsKill * RegState::Kill);
bool InsertedCopy = TII.copyRegToReg(*FuncInfo.MBB, FuncInfo.InsertPt,
ResultReg, II.ImplicitDefs[0],
RC, RC, DL);
if (!InsertedCopy)
ResultReg = 0;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(II.ImplicitDefs[0]);
}
return ResultReg;
}
@ -1126,11 +1120,8 @@ unsigned FastISel::FastEmitInst_ri(unsigned MachineInstOpcode,
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
.addReg(Op0, Op0IsKill * RegState::Kill)
.addImm(Imm);
bool InsertedCopy = TII.copyRegToReg(*FuncInfo.MBB, FuncInfo.InsertPt,
ResultReg, II.ImplicitDefs[0],
RC, RC, DL);
if (!InsertedCopy)
ResultReg = 0;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(II.ImplicitDefs[0]);
}
return ResultReg;
}
@ -1150,11 +1141,8 @@ unsigned FastISel::FastEmitInst_rf(unsigned MachineInstOpcode,
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
.addReg(Op0, Op0IsKill * RegState::Kill)
.addFPImm(FPImm);
bool InsertedCopy = TII.copyRegToReg(*FuncInfo.MBB, FuncInfo.InsertPt,
ResultReg, II.ImplicitDefs[0],
RC, RC, DL);
if (!InsertedCopy)
ResultReg = 0;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(II.ImplicitDefs[0]);
}
return ResultReg;
}
@ -1177,11 +1165,8 @@ unsigned FastISel::FastEmitInst_rri(unsigned MachineInstOpcode,
.addReg(Op0, Op0IsKill * RegState::Kill)
.addReg(Op1, Op1IsKill * RegState::Kill)
.addImm(Imm);
bool InsertedCopy = TII.copyRegToReg(*FuncInfo.MBB, FuncInfo.InsertPt,
ResultReg, II.ImplicitDefs[0],
RC, RC, DL);
if (!InsertedCopy)
ResultReg = 0;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(II.ImplicitDefs[0]);
}
return ResultReg;
}
@ -1196,11 +1181,8 @@ unsigned FastISel::FastEmitInst_i(unsigned MachineInstOpcode,
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg).addImm(Imm);
else {
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm);
bool InsertedCopy = TII.copyRegToReg(*FuncInfo.MBB, FuncInfo.InsertPt,
ResultReg, II.ImplicitDefs[0],
RC, RC, DL);
if (!InsertedCopy)
ResultReg = 0;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(II.ImplicitDefs[0]);
}
return ResultReg;
}