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Implement code generation for constant CFStrings. 

llvm-svn: 41206
This commit is contained in:
Anders Carlsson 2007-08-21 00:21:21 +00:00
parent 8e5b2c27a3
commit b04ea61b79
6 changed files with 88 additions and 3 deletions
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12
clang/CodeGen/CGBuiltin.cpp
View File

@ -15,6 +15,7 @@
#include "CodeGenModule.h"
#include "clang/AST/Builtins.h"
#include "clang/AST/Expr.h"
#include "llvm/Constant.h"
using namespace clang;
using namespace CodeGen;
@ -22,6 +23,17 @@ using namespace CodeGen;
RValue CodeGenFunction::EmitBuiltinExpr(unsigned builtinID, const CallExpr *E)
{
switch (builtinID) {
case Builtin::BI__builtin___CFStringMakeConstantString: {
const Expr *Arg = E->getArg(0);
while (const ParenExpr *PE = dyn_cast<const ParenExpr>(Arg))
Arg = PE->getSubExpr();
const StringLiteral *Literal = cast<const StringLiteral>(Arg);
std::string S(Literal->getStrData(), Literal->getByteLength());
return RValue::get(CGM.GetAddrOfConstantCFString(S));
}
default:
assert(0 && "Unknown builtin id");
}

58
clang/CodeGen/CodeGenModule.cpp
View File

@ -26,7 +26,7 @@ using namespace CodeGen;
CodeGenModule::CodeGenModule(ASTContext &C, llvm::Module &M)
: Context(C), TheModule(M), Types(C, M) {}
: Context(C), TheModule(M), Types(C, M), CFConstantStringClassRef(0) {}
llvm::Constant *CodeGenModule::GetAddrOfGlobalDecl(const Decl *D) {
// See if it is already in the map.
@ -113,3 +113,59 @@ llvm::Function *CodeGenModule::getMemCpyFn() {
}
return MemCpyFn = llvm::Intrinsic::getDeclaration(&TheModule, IID);
}
llvm::Constant *CodeGenModule::GetAddrOfConstantCFString(const std::string &str)
{
llvm::StringMapEntry<llvm::Constant *> &Entry =
CFConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]);
if (Entry.getValue())
return Entry.getValue();
std::vector<llvm::Constant*> Fields;
if (!CFConstantStringClassRef) {
const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy);
Ty = llvm::ArrayType::get(Ty, 0);
CFConstantStringClassRef =
new llvm::GlobalVariable(Ty, false,
llvm::GlobalVariable::ExternalLinkage, 0,
"__CFConstantStringClassReference",
&getModule());
}
// Class pointer.
llvm::Constant *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty);
llvm::Constant *Zeros[] = { Zero, Zero };
llvm::Constant *C =
llvm::ConstantExpr::getGetElementPtr(CFConstantStringClassRef, Zeros, 2);
Fields.push_back(C);
// Flags.
const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy);
Fields.push_back(llvm::ConstantInt::get(Ty, 1992));
// String pointer.
C = llvm::ConstantArray::get(str);
C = new llvm::GlobalVariable(C->getType(), true,
llvm::GlobalValue::InternalLinkage,
C, ".str", &getModule());
C = llvm::ConstantExpr::getGetElementPtr(C, Zeros, 2);
Fields.push_back(C);
// String length.
Ty = getTypes().ConvertType(getContext().LongTy);
Fields.push_back(llvm::ConstantInt::get(Ty, str.length()));
// The struct.
Ty = getTypes().ConvertType(getContext().getCFConstantStringType());
C = llvm::ConstantStruct::get(cast<llvm::StructType>(Ty), Fields);
C = new llvm::GlobalVariable(C->getType(), true,
llvm::GlobalVariable::InternalLinkage,
C, "", &getModule());
Entry.setValue(C);
return C;
}

6
clang/CodeGen/CodeGenModule.h
View File

@ -16,6 +16,7 @@
#include "CodeGenTypes.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
namespace llvm {
class Module;
@ -40,6 +41,9 @@ class CodeGenModule {
llvm::Function *MemCpyFn;
llvm::DenseMap<const Decl*, llvm::Constant*> GlobalDeclMap;
llvm::StringMap<llvm::Constant*> CFConstantStringMap;
llvm::Constant *CFConstantStringClassRef;
public:
CodeGenModule(ASTContext &C, llvm::Module &M);
@ -48,7 +52,7 @@ public:
CodeGenTypes &getTypes() { return Types; }
llvm::Constant *GetAddrOfGlobalDecl(const Decl *D);
llvm::Constant *GetAddrOfConstantCFString(const std::string& str);
llvm::Function *getMemCpyFn();
void EmitFunction(const FunctionDecl *FD);

5
clang/CodeGen/CodeGenTypes.cpp
View File

@ -136,8 +136,11 @@ const llvm::Type *CodeGenTypes::ConvertType(QualType T) {
case Type::Tagged:
const TagType &TT = cast<TagType>(Ty);
const TagDecl *TD = TT.getDecl();
llvm::Type *ResultType;
llvm::Type *&ResultType = TagDeclTypes[TD];
if (ResultType)
return ResultType;
if (!TD->isDefinition()) {
ResultType = llvm::OpaqueType::get();
} else {

4
clang/CodeGen/CodeGenTypes.h
View File

@ -14,6 +14,7 @@
#ifndef CODEGEN_CODEGENTYPES_H
#define CODEGEN_CODEGENTYPES_H
#include "llvm/ADT/DenseMap.h"
#include <vector>
namespace llvm {
@ -23,6 +24,7 @@ namespace llvm {
namespace clang {
class ASTContext;
class TagDecl;
class TargetInfo;
class QualType;
class FunctionTypeProto;
@ -35,6 +37,8 @@ class CodeGenTypes {
ASTContext &Context;
TargetInfo &Target;
llvm::Module& TheModule;
llvm::DenseMap<const TagDecl*, llvm::Type*> TagDeclTypes;
public:
CodeGenTypes(ASTContext &Ctx, llvm::Module &M);

6
clang/clang.xcodeproj/project.pbxproj
View File

@ -10,6 +10,7 @@
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1A869A700BA2164C008DA07A /* LiteralSupport.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = 1A869A6E0BA2164C008DA07A /* LiteralSupport.h */; };
1A869AA80BA21ABA008DA07A /* LiteralSupport.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1A869AA70BA21ABA008DA07A /* LiteralSupport.cpp */; };
1ABC36940C7A4BDC006DB0AB /* CGBuiltin.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1ABC36930C7A4BDC006DB0AB /* CGBuiltin.cpp */; };
84D9A8880C1A57E100AC7ABC /* AttributeList.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 84D9A8870C1A57E100AC7ABC /* AttributeList.cpp */; };
84D9A88C0C1A581300AC7ABC /* AttributeList.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = 84D9A88B0C1A581300AC7ABC /* AttributeList.h */; };
DE01DA490B12ADA300AC22CE /* PPCallbacks.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = DE01DA480B12ADA300AC22CE /* PPCallbacks.h */; };
@ -197,6 +198,7 @@
1A30A9E80B93A4C800201A91 /* ExprCXX.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = ExprCXX.h; path = clang/AST/ExprCXX.h; sourceTree = "<group>"; };
1A869A6E0BA2164C008DA07A /* LiteralSupport.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = LiteralSupport.h; sourceTree = "<group>"; };
1A869AA70BA21ABA008DA07A /* LiteralSupport.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; path = LiteralSupport.cpp; sourceTree = "<group>"; };
1ABC36930C7A4BDC006DB0AB /* CGBuiltin.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = CGBuiltin.cpp; path = CodeGen/CGBuiltin.cpp; sourceTree = "<group>"; };
84D9A8870C1A57E100AC7ABC /* AttributeList.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = AttributeList.cpp; path = Parse/AttributeList.cpp; sourceTree = "<group>"; };
84D9A88B0C1A581300AC7ABC /* AttributeList.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = AttributeList.h; path = clang/Parse/AttributeList.h; sourceTree = "<group>"; };
8DD76F6C0486A84900D96B5E /* clang */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = clang; sourceTree = BUILT_PRODUCTS_DIR; };
@ -430,6 +432,7 @@
DE928B7E0C0A615600231DA4 /* CodeGenModule.cpp */,
DEEBC3BB0C2363BC00A9FE82 /* CodeGenTypes.cpp */,
DEEBC3B90C2363B800A9FE82 /* CodeGenTypes.h */,
1ABC36930C7A4BDC006DB0AB /* CGBuiltin.cpp */,
DE4264FB0C113592005A861D /* CGDecl.cpp */,
DEF2EFF20C6CDD74000C4259 /* CGAggExpr.cpp */,
DE4772FB0C10EAEC002239E8 /* CGExpr.cpp */,
@ -613,9 +616,11 @@
08FB7793FE84155DC02AAC07 /* Project object */ = {
isa = PBXProject;
buildConfigurationList = 1DEB923508733DC60010E9CD /* Build configuration list for PBXProject "clang" */;
compatibilityVersion = "Xcode 2.4";
hasScannedForEncodings = 1;
mainGroup = 08FB7794FE84155DC02AAC07 /* clang */;
projectDirPath = "";
projectRoot = "";
targets = (
8DD76F620486A84900D96B5E /* clang */,
);
@ -687,6 +692,7 @@
DEF2EDA70C6A4252000C4259 /* StmtDumper.cpp in Sources */,
DEF2EFF30C6CDD74000C4259 /* CGAggExpr.cpp in Sources */,
DEF2F0100C6CFED5000C4259 /* SemaChecking.cpp in Sources */,
1ABC36940C7A4BDC006DB0AB /* CGBuiltin.cpp in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;
};