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[ms] [llvm-ml] Improve MASM STRUCT field accessor support

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Summary:
Adds support for several accessors:
- `[<identifier>.<struct name>].<field>`
- `[<identifier>.<struct name>.<field>].<subfield>` (where `field` has already-defined STRUCT type)
- `[<variable>.<field>].<subfield>` (where `field` has already-defined STRUCT type)

Reviewed By: thakis

Differential Revision: https://reviews.llvm.org/D83344
This commit is contained in:
Eric Astor 2020-07-13 10:33:15 -04:00
parent d79de12ea6
commit a4b0bd1d7d
4 changed files with 113 additions and 33 deletions
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8
include/llvm/MC/MCParser/MCAsmParser.h
View File

@ -170,8 +170,12 @@ public:
virtual bool isParsingMasm() const { return false; }
virtual bool LookUpFieldOffset(StringRef Base, StringRef Member,
unsigned &Offset) {
virtual bool lookUpField(StringRef Name, StringRef &Type,
unsigned &Offset) const {
return true;
}
virtual bool lookUpField(StringRef Base, StringRef Member, StringRef &Type,
unsigned &Offset) const {
return true;
}

55
lib/MC/MCParser/MasmParser.cpp
View File

@ -490,8 +490,10 @@ public:
bool isParsingMasm() const override { return true; }
bool LookUpFieldOffset(StringRef Base, StringRef Member,
unsigned &Offset) override;
bool lookUpField(StringRef Name, StringRef &Type,
unsigned &Offset) const override;
bool lookUpField(StringRef Base, StringRef Member, StringRef &Type,
unsigned &Offset) const override;
bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
unsigned &NumOutputs, unsigned &NumInputs,
@ -561,8 +563,8 @@ private:
}
static void DiagHandler(const SMDiagnostic &Diag, void *Context);
bool LookUpFieldOffset(const StructInfo &Structure, StringRef Member,
unsigned &Offset);
bool lookUpField(const StructInfo &Structure, StringRef Member,
StringRef &Type, unsigned &Offset) const;
/// Should we emit DWARF describing this assembler source? (Returns false if
/// the source has .file directives, which means we don't want to generate
@ -1397,12 +1399,13 @@ bool MasmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
}
// Find the field offset if used.
StringRef Type;
unsigned Offset = 0;
Split = SymbolName.split('.');
if (!Split.second.empty()) {
SymbolName = Split.first;
if (Structs.count(SymbolName.lower()) &&
!LookUpFieldOffset(SymbolName, Split.second, Offset)) {
!lookUpField(SymbolName, Split.second, Type, Offset)) {
// This is actually a reference to a field offset.
Res = MCConstantExpr::create(Offset, getContext());
return false;
@ -1410,10 +1413,10 @@ bool MasmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
auto TypeIt = KnownType.find(SymbolName);
if (TypeIt == KnownType.end() ||
LookUpFieldOffset(*TypeIt->second, Split.second, Offset)) {
lookUpField(*TypeIt->second, Split.second, Type, Offset)) {
std::pair<StringRef, StringRef> BaseMember = Split.second.split('.');
StringRef Base = BaseMember.first, Member = BaseMember.second;
LookUpFieldOffset(Base, Member, Offset);
lookUpField(Base, Member, Type, Offset);
}
}
@ -6519,34 +6522,56 @@ static int rewritesSort(const AsmRewrite *AsmRewriteA,
llvm_unreachable("Unstable rewrite sort.");
}
bool MasmParser::LookUpFieldOffset(StringRef Base, StringRef Member,
unsigned &Offset) {
bool MasmParser::lookUpField(StringRef Name, StringRef &Type,
unsigned &Offset) const {
const std::pair<StringRef, StringRef> BaseMember = Name.split('.');
const StringRef Base = BaseMember.first, Member = BaseMember.second;
return lookUpField(Base, Member, Type, Offset);
}
bool MasmParser::lookUpField(StringRef Base, StringRef Member, StringRef &Type,
unsigned &Offset) const {
if (Base.empty())
return true;
unsigned BaseOffset = 0;
if (Base.contains('.') && !lookUpField(Base, Type, BaseOffset))
Base = Type;
auto TypeIt = KnownType.find(Base);
if (TypeIt != KnownType.end())
return LookUpFieldOffset(*TypeIt->second, Member, Offset);
return lookUpField(*TypeIt->second, Member, Type, Offset);
auto StructIt = Structs.find(Base.lower());
if (StructIt != Structs.end())
return LookUpFieldOffset(StructIt->second, Member, Offset);
return lookUpField(StructIt->second, Member, Type, Offset);
return true;
}
bool MasmParser::LookUpFieldOffset(const StructInfo &Structure,
StringRef Member, unsigned &Offset) {
bool MasmParser::lookUpField(const StructInfo &Structure, StringRef Member,
StringRef &Type, unsigned &Offset) const {
if (Member.empty()) {
Type = Structure.Name;
return false;
}
std::pair<StringRef, StringRef> Split = Member.split('.');
const StringRef FieldName = Split.first, FieldMember = Split.second;
auto StructIt = Structs.find(FieldName.lower());
if (StructIt != Structs.end())
return lookUpField(StructIt->second, FieldMember, Type, Offset);
auto FieldIt = Structure.FieldsByName.find(FieldName.lower());
if (FieldIt == Structure.FieldsByName.end())
return true;
const FieldInfo &Field = Structure.Fields[FieldIt->second];
if (FieldMember.empty()) {
Offset = Field.Offset;
Offset += Field.Offset;
if (Field.Contents.FT == FT_STRUCT)
Type = Field.Contents.StructInfo.Structure.Name;
return false;
}
@ -6554,7 +6579,7 @@ bool MasmParser::LookUpFieldOffset(const StructInfo &Structure,
return true;
const StructFieldInfo &StructInfo = Field.Contents.StructInfo;
bool Result = LookUpFieldOffset(StructInfo.Structure, FieldMember, Offset);
bool Result = lookUpField(StructInfo.Structure, FieldMember, Type, Offset);
if (Result)
return true;

33
lib/Target/X86/AsmParser/X86AsmParser.cpp
View File

@ -358,6 +358,7 @@ private:
bool MemExpr;
bool OffsetOperator;
SMLoc OffsetOperatorLoc;
StringRef CurType;
bool setSymRef(const MCExpr *Val, StringRef ID, StringRef &ErrMsg) {
if (Sym) {
@ -385,6 +386,7 @@ private:
unsigned getScale() { return Scale; }
const MCExpr *getSym() { return Sym; }
StringRef getSymName() { return SymName; }
StringRef getType() { return CurType; }
int64_t getImm() { return Imm + IC.execute(); }
bool isValidEndState() {
return State == IES_RBRAC || State == IES_INTEGER;
@ -846,6 +848,7 @@ private:
}
return false;
}
void setType(StringRef Type) { CurType = Type; }
};
bool Error(SMLoc L, const Twine &Msg, SMRange Range = None,
@ -1641,27 +1644,25 @@ bool X86AsmParser::ParseIntelExpression(IntelExprStateMachine &SM, SMLoc &End) {
break;
}
if (Parser.isParsingMasm()) {
const std::pair<StringRef, StringRef> RegField =
const std::pair<StringRef, StringRef> IDField =
Tok.getString().split('.');
const StringRef RegName = RegField.first, Field = RegField.second;
SMLoc RegEndLoc =
SMLoc::getFromPointer(RegName.data() + RegName.size());
const StringRef ID = IDField.first, Field = IDField.second;
SMLoc IDEndLoc = SMLoc::getFromPointer(ID.data() + ID.size());
if (!Field.empty() &&
!MatchRegisterByName(Reg, RegName, IdentLoc, RegEndLoc)) {
!MatchRegisterByName(Reg, ID, IdentLoc, IDEndLoc)) {
if (SM.onRegister(Reg, ErrMsg))
return Error(IdentLoc, ErrMsg);
StringRef Type;
unsigned Offset = 0;
SMLoc FieldStartLoc = SMLoc::getFromPointer(Field.data());
const std::pair<StringRef, StringRef> BaseMember = Field.split('.');
const StringRef Base = BaseMember.first, Member = BaseMember.second;
unsigned Offset;
if (Parser.LookUpFieldOffset(Base, Member, Offset))
if (Parser.lookUpField(Field, Type, Offset))
return Error(FieldStartLoc, "unknown offset");
else if (SM.onPlus(ErrMsg))
return Error(getTok().getLoc(), ErrMsg);
else if (SM.onInteger(Offset, ErrMsg))
return Error(IdentLoc, ErrMsg);
SM.setType(Type);
End = consumeToken();
break;
@ -1915,9 +1916,11 @@ X86AsmParser::ParseRoundingModeOp(SMLoc Start) {
}
/// Parse the '.' operator.
bool X86AsmParser::ParseIntelDotOperator(IntelExprStateMachine &SM, SMLoc &End) {
bool X86AsmParser::ParseIntelDotOperator(IntelExprStateMachine &SM,
SMLoc &End) {
const AsmToken &Tok = getTok();
unsigned Offset;
StringRef Type;
unsigned Offset = 0;
// Drop the optional '.'.
StringRef DotDispStr = Tok.getString();
@ -1933,8 +1936,9 @@ bool X86AsmParser::ParseIntelDotOperator(IntelExprStateMachine &SM, SMLoc &End)
Tok.is(AsmToken::Identifier)) {
const std::pair<StringRef, StringRef> BaseMember = DotDispStr.split('.');
const StringRef Base = BaseMember.first, Member = BaseMember.second;
if (getParser().LookUpFieldOffset(SM.getSymName(), DotDispStr, Offset) &&
getParser().LookUpFieldOffset(Base, Member, Offset) &&
if (getParser().lookUpField(SM.getType(), DotDispStr, Type, Offset) &&
getParser().lookUpField(SM.getSymName(), DotDispStr, Type, Offset) &&
getParser().lookUpField(DotDispStr, Type, Offset) &&
(!SemaCallback ||
SemaCallback->LookupInlineAsmField(Base, Member, Offset)))
return Error(Tok.getLoc(), "Unable to lookup field reference!");
@ -1947,6 +1951,7 @@ bool X86AsmParser::ParseIntelDotOperator(IntelExprStateMachine &SM, SMLoc &End)
while (Tok.getLoc().getPointer() < DotExprEndLoc)
Lex();
SM.addImm(Offset);
SM.setType(Type);
return false;
}

50
test/tools/llvm-ml/struct.test
View File

@ -85,13 +85,11 @@ t3:
mov eax, t2.f.h
mov eax, [t2].f.h
mov eax, [t2.f.h]
mov eax, t2.FOOBAR.f.h
; CHECK: t3:
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
t4:
mov eax, j.FOOBAR.f.h
@ -101,4 +99,52 @@ mov eax, j.baz.b
; CHECK-NEXT: mov eax, dword ptr [rip + j+12]
; CHECK-NEXT: mov eax, dword ptr [rip + j+1]
t5:
mov eax, [ebx].FOOBAR.f.h
mov eax, [ebx.FOOBAR].f.h
mov eax, [ebx.FOOBAR.f.h]
; CHECK: t5:
; CHECK-NEXT: mov eax, dword ptr [ebx + 12]
; CHECK-NEXT: mov eax, dword ptr [ebx + 12]
; CHECK-NEXT: mov eax, dword ptr [ebx + 12]
t6:
mov eax, t2.FOOBAR.f.h
mov eax, [t2].FOOBAR.f.h
mov eax, [t2.FOOBAR].f.h
mov eax, [t2.FOOBAR.f.h]
; CHECK: t6:
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+12]
t7:
mov eax, [ebx].FOOBAR.e.b
mov eax, [ebx.FOOBAR].e.b
mov eax, [ebx.FOOBAR.e].b
mov eax, [ebx.FOOBAR.e.b]
; CHECK: t7:
; CHECK-NEXT: mov eax, dword ptr [ebx + 9]
; CHECK-NEXT: mov eax, dword ptr [ebx + 9]
; CHECK-NEXT: mov eax, dword ptr [ebx + 9]
; CHECK-NEXT: mov eax, dword ptr [ebx + 9]
t8:
mov eax, t2.FOOBAR.e.b
mov eax, [t2].FOOBAR.e.b
mov eax, [t2.FOOBAR].e.b
mov eax, [t2.FOOBAR.e].b
mov eax, [t2.FOOBAR.e.b]
; CHECK: t8:
; CHECK-NEXT: mov eax, dword ptr [rip + t2+9]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+9]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+9]
; CHECK-NEXT: mov eax, dword ptr [rip + (t2+8)+1]
; CHECK-NEXT: mov eax, dword ptr [rip + t2+9]
END