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Refactor how MCCFIInstructions are created.

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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
This commit is contained in:
Rafael Espindola
2012-11-24 02:01:08 +00:00
parent 4ccb49a838
commit 28c9ea3c13
3 changed files with 127 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/llvm/MC/MCDwarf.h
+91 -19
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@@ -275,28 +275,100 @@ namespace llvm {
MachineLocation Destination;
MachineLocation Source;
std::vector<char> Values;
public:
MCCFIInstruction(OpType Op, MCSymbol *L)
: Operation(Op), Label(L) {
assert(Op == RememberState || Op == RestoreState);
}
MCCFIInstruction(OpType Op, MCSymbol *L, unsigned Register)
: Operation(Op), Label(L), Destination(Register) {
assert(Op == SameValue || Op == Restore || Op == Undefined);
}
MCCFIInstruction(MCSymbol *L, const MachineLocation &D,
const MachineLocation &S)
: Operation(Move), Label(L), Destination(D), Source(S) {
}
MCCFIInstruction(OpType Op, MCSymbol *L, const MachineLocation &D,
const MachineLocation &S)
: Operation(Op), Label(L), Destination(D), Source(S) {
assert(Op == RelMove);
const MachineLocation &S, StringRef V) :
Operation(Op), Label(L), Destination(D), Source(S),
Values(V.begin(), V.end()) {
}
MCCFIInstruction(OpType Op, MCSymbol *L, StringRef Vals)
: Operation(Op), Label(L), Values(Vals.begin(), Vals.end()) {
assert(Op == Escape);
public:
static MCCFIInstruction
createCFIOffset(MCSymbol *L, unsigned Register, int Offset) {
MachineLocation Dest(Register, Offset);
MachineLocation Source(Register, Offset);
MCCFIInstruction Ret(Move, L, Dest, Source, "");
return Ret;
}
static MCCFIInstruction
createDefCfaRegister(MCSymbol *L, unsigned Register) {
MachineLocation Dest(Register);
MachineLocation Source(MachineLocation::VirtualFP);
MCCFIInstruction Ret(Move, L, Dest, Source, "");
return Ret;
}
static MCCFIInstruction createDefCfaOffset(MCSymbol *L, int Offset) {
MachineLocation Dest(MachineLocation::VirtualFP);
MachineLocation Source(MachineLocation::VirtualFP, -Offset);
MCCFIInstruction Ret(Move, L, Dest, Source, "");
return Ret;
}
static MCCFIInstruction
createDefCfa(MCSymbol *L, unsigned Register, int Offset) {
MachineLocation Dest(MachineLocation::VirtualFP);
MachineLocation Source(Register, -Offset);
MCCFIInstruction Ret(Move, L, Dest, Source, "");
return Ret;
}
static MCCFIInstruction createUndefined(MCSymbol *L, unsigned Register) {
MachineLocation Dummy;
MachineLocation Dest(Register);
MCCFIInstruction Ret(Undefined, L, Dest, Dummy, "");
return Ret;
}
static MCCFIInstruction createRestore(MCSymbol *L, unsigned Register) {
MachineLocation Dummy;
MachineLocation Dest(Register);
MCCFIInstruction Ret(Restore, L, Dest, Dummy, "");
return Ret;
}
static MCCFIInstruction createSameValue(MCSymbol *L, unsigned Register) {
MachineLocation Dummy;
MachineLocation Dest(Register);
MCCFIInstruction Ret(SameValue, L, Dest, Dummy, "");
return Ret;
}
static MCCFIInstruction createRestoreState(MCSymbol *L) {
MachineLocation Dummy;
MCCFIInstruction Ret(RestoreState, L, Dummy, Dummy, "");
return Ret;
}
static MCCFIInstruction createRememberState(MCSymbol *L) {
MachineLocation Dummy;
MCCFIInstruction Ret(RememberState, L, Dummy, Dummy, "");
return Ret;
}
static MCCFIInstruction
createRelOffset(MCSymbol *L, unsigned Register, int Offset) {
MachineLocation Dest(Register, Offset);
MachineLocation Source(Register, Offset);
MCCFIInstruction Ret(RelMove, L, Dest, Source, "");
return Ret;
}
static MCCFIInstruction
createAdjustCfaOffset(MCSymbol *L, int Adjustment) {
MachineLocation Dest(MachineLocation::VirtualFP);
MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
MCCFIInstruction Ret(RelMove, L, Dest, Source, "");
return Ret;
}
static MCCFIInstruction createEscape(MCSymbol *L, StringRef Vals) {
MachineLocation Dummy;
MCCFIInstruction Ret(Escape, L, Dummy, Dummy, Vals);
return Ret;
}
OpType getOperation() const { return Operation; }
MCSymbol *getLabel() const { return Label; }
const MachineLocation &getDestination() const { return Destination; }