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Change the informal convention of DBG_VALUE so that we can express a

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register-indirect address with an offset of 0.
It used to be that a DBG_VALUE is a register-indirect value if the offset
(operand 1) is nonzero. The new convention is that a DBG_VALUE is
register-indirect if the first operand is a register and the second
operand is an immediate. For plain registers use the combination reg, reg.

rdar://problem/13658587

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180816 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adrian Prantl
2013-04-30 22:16:46 +00:00
parent f13fc1b23a
commit a2b56692c8
14 changed files with 222 additions and 45 deletions
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5
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -4413,8 +4413,9 @@ SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
return false;
MachineInstrBuilder MIB = BuildMI(MF, getCurDebugLoc(),
TII->get(TargetOpcode::DBG_VALUE))
.addReg(Reg, RegState::Debug).addImm(Offset).addMetadata(Variable);
TII->get(TargetOpcode::DBG_VALUE),
Offset != 0,
Reg, Offset, Variable);
FuncInfo.ArgDbgValues.push_back(&*MIB);
return true;
}