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Fix PR22762. When emitting a DWARF expression check whether this is the

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frame register before checking if there is a DWARF register number for it.

Thanks to H.J. Lu for diagnosing this and providing the testcase!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231121 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adrian Prantl
2015-03-03 20:12:52 +00:00
parent 83eaade2b4
commit e8e51a18a2
2 changed files with 67 additions and 6 deletions
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13
lib/CodeGen/AsmPrinter/DwarfExpression.cpp
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@ -66,17 +66,18 @@ void DwarfExpression::AddShr(unsigned ShiftBy) {
}
bool DwarfExpression::AddMachineRegIndirect(unsigned MachineReg, int Offset) {
int DwarfReg = TRI.getDwarfRegNum(MachineReg, false);
if (DwarfReg < 0)
return false;
if (isFrameRegister(MachineReg)) {
// If variable offset is based in frame register then use fbreg.
EmitOp(dwarf::DW_OP_fbreg);
EmitSigned(Offset);
} else {
AddRegIndirect(DwarfReg, Offset);
return true;
}
int DwarfReg = TRI.getDwarfRegNum(MachineReg, false);
if (DwarfReg < 0)
return false;
AddRegIndirect(DwarfReg, Offset);
return true;
}