Refactor how MCCFIInstructions are created.
Give MCCFIInstruction a single, private constructor and add helper static
methods that create each type of cfi instruction. This is is preparation
for changing its representation. The representation with a pair
MachineLocations older than MC and has been abused quiet a bit to support
more cfi instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168532 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index 85b47fe..c9b21e3 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -1264,8 +1264,21 @@
TranslateMachineLocation(MRI, Moves[i].getDestination());
const MachineLocation &Src =
TranslateMachineLocation(MRI, Moves[i].getSource());
- MCCFIInstruction Inst(Label, Dst, Src);
- Instructions.push_back(Inst);
+
+ if (Dst.isReg()) {
+ assert(Dst.getReg() == MachineLocation::VirtualFP);
+ assert(!Src.isReg());
+ MCCFIInstruction Inst =
+ MCCFIInstruction::createDefCfa(Label, Src.getReg(), -Src.getOffset());
+ Instructions.push_back(Inst);
+ } else {
+ assert(Src.isReg());
+ unsigned Reg = Src.getReg();
+ int Offset = Dst.getOffset();
+ MCCFIInstruction Inst =
+ MCCFIInstruction::createCFIOffset(Label, Reg, Offset);
+ Instructions.push_back(Inst);
+ }
}
EmitCFIInstructions(streamer, Instructions, NULL);