mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-28 22:55:52 +00:00
ARM IAS: refactor unwind context
Move the unwinding context for the ARM IAS into a helper class. This is purely a structural refactoring. A follow up change allows for recording additional depth to improve diagnostics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198664 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool
parent
9d76f40575
commit
a83f45be97
@ -113,12 +113,60 @@ public:
|
||||
// file.
|
||||
typedef MapVector<const MCSection *, ConstantPool> ConstantPoolMapTy;
|
||||
|
||||
class UnwindContext {
|
||||
MCAsmParser &Parser;
|
||||
|
||||
SMLoc FnStartLoc;
|
||||
SMLoc CantUnwindLoc;
|
||||
SMLoc PersonalityLoc;
|
||||
SMLoc HandlerDataLoc;
|
||||
int FPReg;
|
||||
|
||||
public:
|
||||
UnwindContext(MCAsmParser &P) : Parser(P), FPReg(-1) {}
|
||||
|
||||
bool hasFnStart() const { return FnStartLoc.isValid(); }
|
||||
bool cantUnwind() const { return CantUnwindLoc.isValid(); }
|
||||
bool hasHandlerData() const { return HandlerDataLoc.isValid(); }
|
||||
bool hasPersonality() const { return PersonalityLoc.isValid(); }
|
||||
|
||||
void recordFnStart(SMLoc L) { FnStartLoc = L; }
|
||||
void recordCantUnwind(SMLoc L) { CantUnwindLoc = L; }
|
||||
void recordPersonality(SMLoc L) { PersonalityLoc = L; }
|
||||
void recordHandlerData(SMLoc L) { HandlerDataLoc = L; }
|
||||
|
||||
void saveFPReg(int Reg) { FPReg = Reg; }
|
||||
int getFPReg() const { return FPReg; }
|
||||
|
||||
void emitFnStartLocNotes() const {
|
||||
Parser.Note(FnStartLoc, ".fnstart was specified here");
|
||||
}
|
||||
void emitCantUnwindLocNotes() const {
|
||||
Parser.Note(CantUnwindLoc, ".cantunwind was specified here");
|
||||
}
|
||||
void emitHandlerDataLocNotes() const {
|
||||
Parser.Note(HandlerDataLoc, ".handlerdata was specified here");
|
||||
}
|
||||
void emitPersonalityLocNotes() const {
|
||||
Parser.Note(PersonalityLoc, ".personality was specified here");
|
||||
}
|
||||
|
||||
void reset() {
|
||||
FnStartLoc = SMLoc();
|
||||
CantUnwindLoc = SMLoc();
|
||||
PersonalityLoc = SMLoc();
|
||||
HandlerDataLoc = SMLoc();
|
||||
FPReg = -1;
|
||||
}
|
||||
};
|
||||
|
||||
class ARMAsmParser : public MCTargetAsmParser {
|
||||
MCSubtargetInfo &STI;
|
||||
MCAsmParser &Parser;
|
||||
const MCInstrInfo &MII;
|
||||
const MCRegisterInfo *MRI;
|
||||
ConstantPoolMapTy ConstantPools;
|
||||
UnwindContext UC;
|
||||
|
||||
// Assembler created constant pools for ldr pseudo
|
||||
ConstantPool *getConstantPool(const MCSection *Section) {
|
||||
@ -138,20 +186,6 @@ class ARMAsmParser : public MCTargetAsmParser {
|
||||
return static_cast<ARMTargetStreamer &>(TS);
|
||||
}
|
||||
|
||||
// Unwind directives state
|
||||
SMLoc FnStartLoc;
|
||||
SMLoc CantUnwindLoc;
|
||||
SMLoc PersonalityLoc;
|
||||
SMLoc HandlerDataLoc;
|
||||
int FPReg;
|
||||
void resetUnwindDirectiveParserState() {
|
||||
FnStartLoc = SMLoc();
|
||||
CantUnwindLoc = SMLoc();
|
||||
PersonalityLoc = SMLoc();
|
||||
HandlerDataLoc = SMLoc();
|
||||
FPReg = -1;
|
||||
}
|
||||
|
||||
// Map of register aliases registers via the .req directive.
|
||||
StringMap<unsigned> RegisterReqs;
|
||||
|
||||
@ -348,7 +382,7 @@ public:
|
||||
|
||||
ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser,
|
||||
const MCInstrInfo &MII)
|
||||
: MCTargetAsmParser(), STI(_STI), Parser(_Parser), MII(MII), FPReg(-1) {
|
||||
: MCTargetAsmParser(), STI(_STI), Parser(_Parser), MII(MII), UC(_Parser) {
|
||||
MCAsmParserExtension::Initialize(_Parser);
|
||||
|
||||
// Cache the MCRegisterInfo.
|
||||
@ -8325,14 +8359,15 @@ bool ARMAsmParser::parseDirectiveFPU(SMLoc L) {
|
||||
/// parseDirectiveFnStart
|
||||
/// ::= .fnstart
|
||||
bool ARMAsmParser::parseDirectiveFnStart(SMLoc L) {
|
||||
if (FnStartLoc.isValid()) {
|
||||
if (UC.hasFnStart()) {
|
||||
Error(L, ".fnstart starts before the end of previous one");
|
||||
Note(FnStartLoc, "previous .fnstart starts here");
|
||||
UC.emitFnStartLocNotes();
|
||||
return false;
|
||||
}
|
||||
|
||||
FnStartLoc = L;
|
||||
getTargetStreamer().emitFnStart();
|
||||
|
||||
UC.recordFnStart(L);
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -8340,34 +8375,36 @@ bool ARMAsmParser::parseDirectiveFnStart(SMLoc L) {
|
||||
/// ::= .fnend
|
||||
bool ARMAsmParser::parseDirectiveFnEnd(SMLoc L) {
|
||||
// Check the ordering of unwind directives
|
||||
if (!FnStartLoc.isValid()) {
|
||||
if (!UC.hasFnStart()) {
|
||||
Error(L, ".fnstart must precede .fnend directive");
|
||||
return false;
|
||||
}
|
||||
|
||||
// Reset the unwind directives parser state
|
||||
resetUnwindDirectiveParserState();
|
||||
getTargetStreamer().emitFnEnd();
|
||||
|
||||
UC.reset();
|
||||
return false;
|
||||
}
|
||||
|
||||
/// parseDirectiveCantUnwind
|
||||
/// ::= .cantunwind
|
||||
bool ARMAsmParser::parseDirectiveCantUnwind(SMLoc L) {
|
||||
UC.recordCantUnwind(L);
|
||||
|
||||
// Check the ordering of unwind directives
|
||||
CantUnwindLoc = L;
|
||||
if (!FnStartLoc.isValid()) {
|
||||
if (!UC.hasFnStart()) {
|
||||
Error(L, ".fnstart must precede .cantunwind directive");
|
||||
return false;
|
||||
}
|
||||
if (HandlerDataLoc.isValid()) {
|
||||
if (UC.hasHandlerData()) {
|
||||
Error(L, ".cantunwind can't be used with .handlerdata directive");
|
||||
Note(HandlerDataLoc, ".handlerdata was specified here");
|
||||
UC.emitHandlerDataLocNotes();
|
||||
return false;
|
||||
}
|
||||
if (PersonalityLoc.isValid()) {
|
||||
if (UC.hasPersonality()) {
|
||||
Error(L, ".cantunwind can't be used with .personality directive");
|
||||
Note(PersonalityLoc, ".personality was specified here");
|
||||
UC.emitPersonalityLocNotes();
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -8378,20 +8415,21 @@ bool ARMAsmParser::parseDirectiveCantUnwind(SMLoc L) {
|
||||
/// parseDirectivePersonality
|
||||
/// ::= .personality name
|
||||
bool ARMAsmParser::parseDirectivePersonality(SMLoc L) {
|
||||
UC.recordPersonality(L);
|
||||
|
||||
// Check the ordering of unwind directives
|
||||
PersonalityLoc = L;
|
||||
if (!FnStartLoc.isValid()) {
|
||||
if (!UC.hasFnStart()) {
|
||||
Error(L, ".fnstart must precede .personality directive");
|
||||
return false;
|
||||
}
|
||||
if (CantUnwindLoc.isValid()) {
|
||||
if (UC.cantUnwind()) {
|
||||
Error(L, ".personality can't be used with .cantunwind directive");
|
||||
Note(CantUnwindLoc, ".cantunwind was specified here");
|
||||
UC.emitCantUnwindLocNotes();
|
||||
return false;
|
||||
}
|
||||
if (HandlerDataLoc.isValid()) {
|
||||
if (UC.hasHandlerData()) {
|
||||
Error(L, ".personality must precede .handlerdata directive");
|
||||
Note(HandlerDataLoc, ".handlerdata was specified here");
|
||||
UC.emitHandlerDataLocNotes();
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -8412,15 +8450,16 @@ bool ARMAsmParser::parseDirectivePersonality(SMLoc L) {
|
||||
/// parseDirectiveHandlerData
|
||||
/// ::= .handlerdata
|
||||
bool ARMAsmParser::parseDirectiveHandlerData(SMLoc L) {
|
||||
UC.recordHandlerData(L);
|
||||
|
||||
// Check the ordering of unwind directives
|
||||
HandlerDataLoc = L;
|
||||
if (!FnStartLoc.isValid()) {
|
||||
if (!UC.hasFnStart()) {
|
||||
Error(L, ".fnstart must precede .personality directive");
|
||||
return false;
|
||||
}
|
||||
if (CantUnwindLoc.isValid()) {
|
||||
if (UC.cantUnwind()) {
|
||||
Error(L, ".handlerdata can't be used with .cantunwind directive");
|
||||
Note(CantUnwindLoc, ".cantunwind was specified here");
|
||||
UC.emitCantUnwindLocNotes();
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -8432,20 +8471,20 @@ bool ARMAsmParser::parseDirectiveHandlerData(SMLoc L) {
|
||||
/// ::= .setfp fpreg, spreg [, offset]
|
||||
bool ARMAsmParser::parseDirectiveSetFP(SMLoc L) {
|
||||
// Check the ordering of unwind directives
|
||||
if (!FnStartLoc.isValid()) {
|
||||
if (!UC.hasFnStart()) {
|
||||
Error(L, ".fnstart must precede .setfp directive");
|
||||
return false;
|
||||
}
|
||||
if (HandlerDataLoc.isValid()) {
|
||||
if (UC.hasHandlerData()) {
|
||||
Error(L, ".setfp must precede .handlerdata directive");
|
||||
return false;
|
||||
}
|
||||
|
||||
// Parse fpreg
|
||||
SMLoc NewFPRegLoc = Parser.getTok().getLoc();
|
||||
int NewFPReg = tryParseRegister();
|
||||
if (NewFPReg == -1) {
|
||||
Error(NewFPRegLoc, "frame pointer register expected");
|
||||
SMLoc FPRegLoc = Parser.getTok().getLoc();
|
||||
int FPReg = tryParseRegister();
|
||||
if (FPReg == -1) {
|
||||
Error(FPRegLoc, "frame pointer register expected");
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -8457,21 +8496,20 @@ bool ARMAsmParser::parseDirectiveSetFP(SMLoc L) {
|
||||
Parser.Lex(); // skip comma
|
||||
|
||||
// Parse spreg
|
||||
SMLoc NewSPRegLoc = Parser.getTok().getLoc();
|
||||
int NewSPReg = tryParseRegister();
|
||||
if (NewSPReg == -1) {
|
||||
Error(NewSPRegLoc, "stack pointer register expected");
|
||||
SMLoc SPRegLoc = Parser.getTok().getLoc();
|
||||
int SPReg = tryParseRegister();
|
||||
if (SPReg == -1) {
|
||||
Error(SPRegLoc, "stack pointer register expected");
|
||||
return false;
|
||||
}
|
||||
|
||||
if (NewSPReg != ARM::SP && NewSPReg != FPReg) {
|
||||
Error(NewSPRegLoc,
|
||||
"register should be either $sp or the latest fp register");
|
||||
if (SPReg != ARM::SP && SPReg != UC.getFPReg()) {
|
||||
Error(SPRegLoc, "register should be either $sp or the latest fp register");
|
||||
return false;
|
||||
}
|
||||
|
||||
// Update the frame pointer register
|
||||
FPReg = NewFPReg;
|
||||
UC.saveFPReg(FPReg);
|
||||
|
||||
// Parse offset
|
||||
int64_t Offset = 0;
|
||||
@ -8501,8 +8539,8 @@ bool ARMAsmParser::parseDirectiveSetFP(SMLoc L) {
|
||||
Offset = CE->getValue();
|
||||
}
|
||||
|
||||
getTargetStreamer().emitSetFP(static_cast<unsigned>(NewFPReg),
|
||||
static_cast<unsigned>(NewSPReg), Offset);
|
||||
getTargetStreamer().emitSetFP(static_cast<unsigned>(FPReg),
|
||||
static_cast<unsigned>(SPReg), Offset);
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -8510,11 +8548,11 @@ bool ARMAsmParser::parseDirectiveSetFP(SMLoc L) {
|
||||
/// ::= .pad offset
|
||||
bool ARMAsmParser::parseDirectivePad(SMLoc L) {
|
||||
// Check the ordering of unwind directives
|
||||
if (!FnStartLoc.isValid()) {
|
||||
if (!UC.hasFnStart()) {
|
||||
Error(L, ".fnstart must precede .pad directive");
|
||||
return false;
|
||||
}
|
||||
if (HandlerDataLoc.isValid()) {
|
||||
if (UC.hasHandlerData()) {
|
||||
Error(L, ".pad must precede .handlerdata directive");
|
||||
return false;
|
||||
}
|
||||
@ -8549,11 +8587,11 @@ bool ARMAsmParser::parseDirectivePad(SMLoc L) {
|
||||
/// ::= .vsave { registers }
|
||||
bool ARMAsmParser::parseDirectiveRegSave(SMLoc L, bool IsVector) {
|
||||
// Check the ordering of unwind directives
|
||||
if (!FnStartLoc.isValid()) {
|
||||
if (!UC.hasFnStart()) {
|
||||
Error(L, ".fnstart must precede .save or .vsave directives");
|
||||
return false;
|
||||
}
|
||||
if (HandlerDataLoc.isValid()) {
|
||||
if (UC.hasHandlerData()) {
|
||||
Error(L, ".save or .vsave must precede .handlerdata directive");
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -24,7 +24,7 @@ func1:
|
||||
@ CHECK: error: .fnstart starts before the end of previous one
|
||||
@ CHECK: .fnstart
|
||||
@ CHECK: ^
|
||||
@ CHECK: note: previous .fnstart starts here
|
||||
@ CHECK: note: .fnstart was specified here
|
||||
@ CHECK: .fnstart
|
||||
@ CHECK: ^
|
||||
func2:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user