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Diffstat (limited to 'lib/Bytecode/Reader/ConstantReader.cpp')
-rw-r--r--lib/Bytecode/Reader/ConstantReader.cpp145
1 files changed, 90 insertions, 55 deletions
diff --git a/lib/Bytecode/Reader/ConstantReader.cpp b/lib/Bytecode/Reader/ConstantReader.cpp
index 37e201f280..88bfa3444a 100644
--- a/lib/Bytecode/Reader/ConstantReader.cpp
+++ b/lib/Bytecode/Reader/ConstantReader.cpp
@@ -10,17 +10,14 @@
#include "ReaderInternals.h"
#include "llvm/Module.h"
-#include "llvm/Constants.h"
-#include "llvm/GlobalVariable.h"
#include <algorithm>
-#include <iostream>
using std::make_pair;
const Type *BytecodeParser::parseTypeConstant(const uchar *&Buf,
const uchar *EndBuf) {
unsigned PrimType;
- if (read_vbr(Buf, EndBuf, PrimType)) return failure<const Type*>(0);
+ if (read_vbr(Buf, EndBuf, PrimType)) return 0;
const Type *Val = 0;
if ((Val = Type::getPrimitiveType((Type::PrimitiveID)PrimType)))
@@ -29,18 +26,18 @@ const Type *BytecodeParser::parseTypeConstant(const uchar *&Buf,
switch (PrimType) {
case Type::FunctionTyID: {
unsigned Typ;
- if (read_vbr(Buf, EndBuf, Typ)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, Typ)) return Val;
const Type *RetType = getType(Typ);
- if (RetType == 0) return failure(Val);
+ if (RetType == 0) return Val;
unsigned NumParams;
- if (read_vbr(Buf, EndBuf, NumParams)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, NumParams)) return Val;
std::vector<const Type*> Params;
while (NumParams--) {
- if (read_vbr(Buf, EndBuf, Typ)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, Typ)) return Val;
const Type *Ty = getType(Typ);
- if (Ty == 0) return failure(Val);
+ if (Ty == 0) return Val;
Params.push_back(Ty);
}
@@ -51,12 +48,12 @@ const Type *BytecodeParser::parseTypeConstant(const uchar *&Buf,
}
case Type::ArrayTyID: {
unsigned ElTyp;
- if (read_vbr(Buf, EndBuf, ElTyp)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, ElTyp)) return Val;
const Type *ElementType = getType(ElTyp);
- if (ElementType == 0) return failure(Val);
+ if (ElementType == 0) return Val;
unsigned NumElements;
- if (read_vbr(Buf, EndBuf, NumElements)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, NumElements)) return Val;
BCR_TRACE(5, "Array Type Constant #" << ElTyp << " size="
<< NumElements << "\n");
@@ -66,23 +63,23 @@ const Type *BytecodeParser::parseTypeConstant(const uchar *&Buf,
unsigned Typ;
std::vector<const Type*> Elements;
- if (read_vbr(Buf, EndBuf, Typ)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, Typ)) return Val;
while (Typ) { // List is terminated by void/0 typeid
const Type *Ty = getType(Typ);
- if (Ty == 0) return failure(Val);
+ if (Ty == 0) return Val;
Elements.push_back(Ty);
- if (read_vbr(Buf, EndBuf, Typ)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, Typ)) return Val;
}
return StructType::get(Elements);
}
case Type::PointerTyID: {
unsigned ElTyp;
- if (read_vbr(Buf, EndBuf, ElTyp)) return failure(Val);
+ if (read_vbr(Buf, EndBuf, ElTyp)) return Val;
BCR_TRACE(5, "Pointer Type Constant #" << (ElTyp-14) << "\n");
const Type *ElementType = getType(ElTyp);
- if (ElementType == 0) return failure(Val);
+ if (ElementType == 0) return Val;
return PointerType::get(ElementType);
}
@@ -94,7 +91,7 @@ const Type *BytecodeParser::parseTypeConstant(const uchar *&Buf,
std::cerr << __FILE__ << ":" << __LINE__
<< ": Don't know how to deserialize"
<< " primitive Type " << PrimType << "\n";
- return failure(Val);
+ return Val;
}
}
@@ -149,7 +146,7 @@ bool BytecodeParser::parseTypeConstants(const uchar *&Buf, const uchar *EndBuf,
//
for (unsigned i = 0; i < NumEntries; ++i) {
const Type *NewTy = parseTypeConstant(Buf, EndBuf), *OldTy = Tab[i].get();
- if (NewTy == 0) return failure(true);
+ if (NewTy == 0) return true;
BCR_TRACE(4, "#" << i << ": Read Type Constant: '" << NewTy <<
"' Replacing: " << OldTy << "\n");
@@ -184,21 +181,21 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
// a ConstantExpr can be of any type, and has no explicit value.
//
unsigned isExprNumArgs; // 0 if not expr; numArgs if is expr
- if (read_vbr(Buf, EndBuf, isExprNumArgs)) return failure(true);
+ if (read_vbr(Buf, EndBuf, isExprNumArgs)) return true;
if (isExprNumArgs) {
// FIXME: Encoding of constant exprs could be much more compact!
unsigned Opcode;
std::vector<Constant*> ArgVec;
ArgVec.reserve(isExprNumArgs);
- if (read_vbr(Buf, EndBuf, Opcode)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Opcode)) return true;
// Read the slot number and types of each of the arguments
for (unsigned i = 0; i != isExprNumArgs; ++i) {
unsigned ArgValSlot, ArgTypeSlot;
- if (read_vbr(Buf, EndBuf, ArgValSlot)) return failure(true);
- if (read_vbr(Buf, EndBuf, ArgTypeSlot)) return failure(true);
+ if (read_vbr(Buf, EndBuf, ArgValSlot)) return true;
+ if (read_vbr(Buf, EndBuf, ArgTypeSlot)) return true;
const Type *ArgTy = getType(ArgTypeSlot);
- if (ArgTy == 0) return failure(true);
+ if (ArgTy == 0) return true;
BCR_TRACE(4, "CE Arg " << i << ": Type: '" << ArgTy << "' slot: "
<< ArgValSlot << "\n");
@@ -207,10 +204,23 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
Value *Val = getValue(ArgTy, ArgValSlot, false);
Constant *C;
if (Val) {
- if (!(C = dyn_cast<Constant>(Val))) return failure(true);
+ if (!(C = dyn_cast<Constant>(Val))) return true;
BCR_TRACE(5, "Constant Found in ValueTable!\n");
} else { // Nope... find or create a forward ref. for it
- C = fwdRefs.GetFwdRefToConstant(ArgTy, ArgValSlot);
+ GlobalRefsType::iterator I = GlobalRefs.find(make_pair(Ty, ArgValSlot));
+
+ if (I != GlobalRefs.end()) {
+ BCR_TRACE(5, "Previous forward ref found!\n");
+ C = cast<Constant>(I->second);
+ } else {
+ // Create a placeholder for the constant reference and
+ // keep track of the fact that we have a forward ref to recycle it
+ BCR_TRACE(5, "Creating new forward ref to a constant!\n");
+ C = new ConstPHolder(ArgTy, ArgValSlot);
+
+ // Keep track of the fact that we have a forward ref to recycle it
+ GlobalRefs.insert(make_pair(make_pair(ArgTy, ArgValSlot), C));
+ }
}
ArgVec.push_back(C);
}
@@ -232,8 +242,8 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: {
unsigned Val;
- if (read_vbr(Buf, EndBuf, Val)) return failure(true);
- if (Val != 0 && Val != 1) return failure(true);
+ if (read_vbr(Buf, EndBuf, Val)) return true;
+ if (Val != 0 && Val != 1) return true;
V = ConstantBool::get(Val == 1);
break;
}
@@ -242,15 +252,15 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
case Type::UShortTyID:
case Type::UIntTyID: {
unsigned Val;
- if (read_vbr(Buf, EndBuf, Val)) return failure(true);
- if (!ConstantUInt::isValueValidForType(Ty, Val)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Val)) return true;
+ if (!ConstantUInt::isValueValidForType(Ty, Val)) return true;
V = ConstantUInt::get(Ty, Val);
break;
}
case Type::ULongTyID: {
uint64_t Val;
- if (read_vbr(Buf, EndBuf, Val)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Val)) return true;
V = ConstantUInt::get(Ty, Val);
break;
}
@@ -259,29 +269,29 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
case Type::ShortTyID:
case Type::IntTyID: {
int Val;
- if (read_vbr(Buf, EndBuf, Val)) return failure(true);
- if (!ConstantSInt::isValueValidForType(Ty, Val)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Val)) return true;
+ if (!ConstantSInt::isValueValidForType(Ty, Val)) return true;
V = ConstantSInt::get(Ty, Val);
break;
}
case Type::LongTyID: {
int64_t Val;
- if (read_vbr(Buf, EndBuf, Val)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Val)) return true;
V = ConstantSInt::get(Ty, Val);
break;
}
case Type::FloatTyID: {
float F;
- if (input_data(Buf, EndBuf, &F, &F+1)) return failure(true);
+ if (input_data(Buf, EndBuf, &F, &F+1)) return true;
V = ConstantFP::get(Ty, F);
break;
}
case Type::DoubleTyID: {
double Val;
- if (input_data(Buf, EndBuf, &Val, &Val+1)) return failure(true);
+ if (input_data(Buf, EndBuf, &Val, &Val+1)) return true;
V = ConstantFP::get(Ty, Val);
break;
}
@@ -297,9 +307,9 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
std::vector<Constant*> Elements;
while (NumElements--) { // Read all of the elements of the constant.
unsigned Slot;
- if (read_vbr(Buf, EndBuf, Slot)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Slot)) return true;
Value *V = getValue(AT->getElementType(), Slot, false);
- if (!V || !isa<Constant>(V)) return failure(true);
+ if (!V || !isa<Constant>(V)) return true;
Elements.push_back(cast<Constant>(V));
}
V = ConstantArray::get(AT, Elements);
@@ -313,10 +323,10 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
std::vector<Constant *> Elements;
for (unsigned i = 0; i < ET.size(); ++i) {
unsigned Slot;
- if (read_vbr(Buf, EndBuf, Slot)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Slot)) return true;
Value *V = getValue(ET[i], Slot, false);
if (!V || !isa<Constant>(V))
- return failure(true);
+ return true;
Elements.push_back(cast<Constant>(V));
}
@@ -327,7 +337,7 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
case Type::PointerTyID: {
const PointerType *PT = cast<const PointerType>(Ty);
unsigned SubClass;
- if (read_vbr(Buf, EndBuf, SubClass)) return failure(true);
+ if (read_vbr(Buf, EndBuf, SubClass)) return true;
switch (SubClass) {
case 0: // ConstantPointerNull value...
V = ConstantPointerNull::get(PT);
@@ -335,17 +345,35 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
case 1: { // ConstantPointerRef value...
unsigned Slot;
- if (read_vbr(Buf, EndBuf, Slot)) return failure(true);
+ if (read_vbr(Buf, EndBuf, Slot)) return true;
BCR_TRACE(4, "CPR: Type: '" << Ty << "' slot: " << Slot << "\n");
- // Check to see if we have already read this global variable yet...
+ // Check to see if we have already read this global variable...
Value *Val = getValue(PT, Slot, false);
- GlobalValue* GV;
+ GlobalValue *GV;
if (Val) {
- if (!(GV = dyn_cast<GlobalValue>(Val))) return failure(true);
+ if (!(GV = dyn_cast<GlobalValue>(Val))) return true;
BCR_TRACE(5, "Value Found in ValueTable!\n");
} else { // Nope... find or create a forward ref. for it
- GV = fwdRefs.GetFwdRefToGlobal(PT, Slot);
+ GlobalRefsType::iterator I = GlobalRefs.find(make_pair(PT, Slot));
+
+ if (I != GlobalRefs.end()) {
+ BCR_TRACE(5, "Previous forward ref found!\n");
+ GV = cast<GlobalValue>(I->second);
+ } else {
+ BCR_TRACE(5, "Creating new forward ref to a global variable!\n");
+
+ // Create a placeholder for the global variable reference...
+ GlobalVariable *GVar =
+ new GlobalVariable(PT->getElementType(), false, true);
+
+ // Keep track of the fact that we have a forward ref to recycle it
+ GlobalRefs.insert(make_pair(make_pair(PT, Slot), GVar));
+
+ // Must temporarily push this value into the module table...
+ TheModule->getGlobalList().push_back(GVar);
+ GV = GVar;
+ }
}
V = ConstantPointerRef::get(GV);
break;
@@ -353,7 +381,7 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
default:
BCR_TRACE(5, "UNKNOWN Pointer Constant Type!\n");
- return failure(true);
+ return true;
}
break;
}
@@ -362,7 +390,7 @@ bool BytecodeParser::parseConstantValue(const uchar *&Buf, const uchar *EndBuf,
std::cerr << __FILE__ << ":" << __LINE__
<< ": Don't know how to deserialize constant value of type '"
<< Ty->getName() << "'\n";
- return failure(true);
+ return true;
}
return false;
@@ -375,9 +403,9 @@ bool BytecodeParser::ParseConstantPool(const uchar *&Buf, const uchar *EndBuf,
unsigned NumEntries, Typ;
if (read_vbr(Buf, EndBuf, NumEntries) ||
- read_vbr(Buf, EndBuf, Typ)) return failure(true);
+ read_vbr(Buf, EndBuf, Typ)) return true;
const Type *Ty = getType(Typ);
- if (Ty == 0) return failure(true);
+ if (Ty == 0) return true;
BCR_TRACE(3, "Type: '" << Ty << "' NumEntries: " << NumEntries << "\n");
if (Typ == Type::TypeTyID) {
@@ -386,15 +414,22 @@ bool BytecodeParser::ParseConstantPool(const uchar *&Buf, const uchar *EndBuf,
for (unsigned i = 0; i < NumEntries; ++i) {
Constant *I;
int Slot;
- if (parseConstantValue(Buf, EndBuf, Ty, I)) return failure(true);
- assert(I && "parseConstantValue returned `!failure' and NULL result");
+ if (parseConstantValue(Buf, EndBuf, Ty, I)) return true;
+ assert(I && "parseConstantValue returned NULL!");
BCR_TRACE(4, "Read Constant: '" << I << "'\n");
- if ((Slot = insertValue(I, Tab)) < 0) return failure(true);
- resolveRefsToConstant(I, (unsigned) Slot);
+ if ((Slot = insertValue(I, Tab)) < 0) return true;
+
+ // If we are reading a function constant table, make sure that we adjust
+ // the slot number to be the real global constant number.
+ //
+ if (&Tab != &ModuleValues)
+ Slot += ModuleValues[Typ].size();
+
+ ResolveReferencesToValue(I, (unsigned)Slot);
}
}
}
- if (Buf > EndBuf) return failure(true);
+ if (Buf > EndBuf) return true;
return false;
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-05-05 10:05:23 +0000