// This file implements printing the assembly code for an Ocaml frametable.
//
//===----------------------------------------------------------------------===//
-
+
#include "llvm/CodeGen/GCs.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/GCMetadataPrinter.h"
-#include "llvm/Module.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetData.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
-
+#include "llvm/Target/TargetSubtargetInfo.h"
+#include <cctype>
using namespace llvm;
namespace {
- class VISIBILITY_HIDDEN OcamlGCMetadataPrinter : public GCMetadataPrinter {
- public:
- void beginAssembly(raw_ostream &OS, AsmPrinter &AP,
- const TargetAsmInfo &TAI);
-
- void finishAssembly(raw_ostream &OS, AsmPrinter &AP,
- const TargetAsmInfo &TAI);
- };
-
+class OcamlGCMetadataPrinter : public GCMetadataPrinter {
+public:
+ void beginAssembly(Module &M, GCModuleInfo &Info, AsmPrinter &AP) override;
+ void finishAssembly(Module &M, GCModuleInfo &Info, AsmPrinter &AP) override;
+};
}
static GCMetadataPrinterRegistry::Add<OcamlGCMetadataPrinter>
-Y("ocaml", "ocaml 3.10-compatible collector");
+ Y("ocaml", "ocaml 3.10-compatible collector");
-void llvm::linkOcamlGCPrinter() { }
+void llvm::linkOcamlGCPrinter() {}
-static void EmitCamlGlobal(const Module &M, raw_ostream &OS, AsmPrinter &AP,
- const TargetAsmInfo &TAI, const char *Id) {
+static void EmitCamlGlobal(const Module &M, AsmPrinter &AP, const char *Id) {
const std::string &MId = M.getModuleIdentifier();
-
- std::string Mangled;
- Mangled += TAI.getGlobalPrefix();
- Mangled += "caml";
- size_t Letter = Mangled.size();
- Mangled.append(MId.begin(), std::find(MId.begin(), MId.end(), '.'));
- Mangled += "__";
- Mangled += Id;
-
+
+ std::string SymName;
+ SymName += "caml";
+ size_t Letter = SymName.size();
+ SymName.append(MId.begin(), std::find(MId.begin(), MId.end(), '.'));
+ SymName += "__";
+ SymName += Id;
+
// Capitalize the first letter of the module name.
- Mangled[Letter] = toupper(Mangled[Letter]);
-
- if (const char *GlobalDirective = TAI.getGlobalDirective())
- OS << GlobalDirective << Mangled << "\n";
- OS << Mangled << ":\n";
+ SymName[Letter] = toupper(SymName[Letter]);
+
+ SmallString<128> TmpStr;
+ AP.Mang->getNameWithPrefix(TmpStr, SymName);
+
+ MCSymbol *Sym = AP.OutContext.GetOrCreateSymbol(TmpStr);
+
+ AP.OutStreamer->EmitSymbolAttribute(Sym, MCSA_Global);
+ AP.OutStreamer->EmitLabel(Sym);
}
-void OcamlGCMetadataPrinter::beginAssembly(raw_ostream &OS, AsmPrinter &AP,
- const TargetAsmInfo &TAI) {
- AP.SwitchToSection(TAI.getTextSection());
- EmitCamlGlobal(getModule(), OS, AP, TAI, "code_begin");
-
- AP.SwitchToSection(TAI.getDataSection());
- EmitCamlGlobal(getModule(), OS, AP, TAI, "data_begin");
+void OcamlGCMetadataPrinter::beginAssembly(Module &M, GCModuleInfo &Info,
+ AsmPrinter &AP) {
+ AP.OutStreamer->SwitchSection(AP.getObjFileLowering().getTextSection());
+ EmitCamlGlobal(M, AP, "code_begin");
+
+ AP.OutStreamer->SwitchSection(AP.getObjFileLowering().getDataSection());
+ EmitCamlGlobal(M, AP, "data_begin");
}
/// emitAssembly - Print the frametable. The ocaml frametable format is thus:
-///
+///
/// extern "C" struct align(sizeof(intptr_t)) {
/// uint16_t NumDescriptors;
/// struct align(sizeof(intptr_t)) {
/// uint16_t LiveOffsets[NumLiveOffsets];
/// } Descriptors[NumDescriptors];
/// } caml${module}__frametable;
-///
+///
/// Note that this precludes programs from stack frames larger than 64K
/// (FrameSize and LiveOffsets would overflow). FrameTablePrinter will abort if
/// either condition is detected in a function which uses the GC.
-///
-void OcamlGCMetadataPrinter::finishAssembly(raw_ostream &OS, AsmPrinter &AP,
- const TargetAsmInfo &TAI) {
- const char *AddressDirective;
- int AddressAlignLog;
- if (AP.TM.getTargetData()->getPointerSize() == sizeof(int32_t)) {
- AddressDirective = TAI.getData32bitsDirective();
- AddressAlignLog = 2;
- } else {
- AddressDirective = TAI.getData64bitsDirective();
- AddressAlignLog = 3;
+///
+void OcamlGCMetadataPrinter::finishAssembly(Module &M, GCModuleInfo &Info,
+ AsmPrinter &AP) {
+ unsigned IntPtrSize = AP.TM.getDataLayout()->getPointerSize();
+
+ AP.OutStreamer->SwitchSection(AP.getObjFileLowering().getTextSection());
+ EmitCamlGlobal(M, AP, "code_end");
+
+ AP.OutStreamer->SwitchSection(AP.getObjFileLowering().getDataSection());
+ EmitCamlGlobal(M, AP, "data_end");
+
+ // FIXME: Why does ocaml emit this??
+ AP.OutStreamer->EmitIntValue(0, IntPtrSize);
+
+ AP.OutStreamer->SwitchSection(AP.getObjFileLowering().getDataSection());
+ EmitCamlGlobal(M, AP, "frametable");
+
+ int NumDescriptors = 0;
+ for (GCModuleInfo::FuncInfoVec::iterator I = Info.funcinfo_begin(),
+ IE = Info.funcinfo_end();
+ I != IE; ++I) {
+ GCFunctionInfo &FI = **I;
+ if (FI.getStrategy().getName() != getStrategy().getName())
+ // this function is managed by some other GC
+ continue;
+ for (GCFunctionInfo::iterator J = FI.begin(), JE = FI.end(); J != JE; ++J) {
+ NumDescriptors++;
+ }
+ }
+
+ if (NumDescriptors >= 1 << 16) {
+ // Very rude!
+ report_fatal_error(" Too much descriptor for ocaml GC");
}
+ AP.EmitInt16(NumDescriptors);
+ AP.EmitAlignment(IntPtrSize == 4 ? 2 : 3);
- AP.SwitchToSection(TAI.getTextSection());
- EmitCamlGlobal(getModule(), OS, AP, TAI, "code_end");
-
- AP.SwitchToSection(TAI.getDataSection());
- EmitCamlGlobal(getModule(), OS, AP, TAI, "data_end");
-
- OS << AddressDirective << 0; // FIXME: Why does ocaml emit this??
- AP.EOL();
-
- AP.SwitchToSection(TAI.getDataSection());
- EmitCamlGlobal(getModule(), OS, AP, TAI, "frametable");
-
- for (iterator I = begin(), IE = end(); I != IE; ++I) {
+ for (GCModuleInfo::FuncInfoVec::iterator I = Info.funcinfo_begin(),
+ IE = Info.funcinfo_end();
+ I != IE; ++I) {
GCFunctionInfo &FI = **I;
-
+ if (FI.getStrategy().getName() != getStrategy().getName())
+ // this function is managed by some other GC
+ continue;
+
uint64_t FrameSize = FI.getFrameSize();
- if (FrameSize >= 1<<16) {
- cerr << "Function '" << FI.getFunction().getNameStart()
- << "' is too large for the ocaml GC! "
- << "Frame size " << FrameSize << " >= 65536.\n";
- cerr << "(" << uintptr_t(&FI) << ")\n";
- abort(); // Very rude!
+ if (FrameSize >= 1 << 16) {
+ // Very rude!
+ report_fatal_error("Function '" + FI.getFunction().getName() +
+ "' is too large for the ocaml GC! "
+ "Frame size " +
+ Twine(FrameSize) + ">= 65536.\n"
+ "(" +
+ Twine(uintptr_t(&FI)) + ")");
}
-
- OS << "\t" << TAI.getCommentString() << " live roots for "
- << FI.getFunction().getNameStart() << "\n";
-
+
+ AP.OutStreamer->AddComment("live roots for " +
+ Twine(FI.getFunction().getName()));
+ AP.OutStreamer->AddBlankLine();
+
for (GCFunctionInfo::iterator J = FI.begin(), JE = FI.end(); J != JE; ++J) {
size_t LiveCount = FI.live_size(J);
- if (LiveCount >= 1<<16) {
- cerr << "Function '" << FI.getFunction().getNameStart()
- << "' is too large for the ocaml GC! "
- << "Live root count " << LiveCount << " >= 65536.\n";
- abort(); // Very rude!
+ if (LiveCount >= 1 << 16) {
+ // Very rude!
+ report_fatal_error("Function '" + FI.getFunction().getName() +
+ "' is too large for the ocaml GC! "
+ "Live root count " +
+ Twine(LiveCount) + " >= 65536.");
}
-
- OS << AddressDirective
- << TAI.getPrivateGlobalPrefix() << "label" << J->Num;
- AP.EOL("call return address");
-
+
+ AP.OutStreamer->EmitSymbolValue(J->Label, IntPtrSize);
AP.EmitInt16(FrameSize);
- AP.EOL("stack frame size");
-
AP.EmitInt16(LiveCount);
- AP.EOL("live root count");
-
+
for (GCFunctionInfo::live_iterator K = FI.live_begin(J),
- KE = FI.live_end(J); K != KE; ++K) {
- assert(K->StackOffset < 1<<16 &&
- "GC root stack offset is outside of fixed stack frame and out "
- "of range for ocaml GC!");
-
- OS << "\t.word\t" << K->StackOffset;
- AP.EOL("stack offset");
+ KE = FI.live_end(J);
+ K != KE; ++K) {
+ if (K->StackOffset >= 1 << 16) {
+ // Very rude!
+ report_fatal_error(
+ "GC root stack offset is outside of fixed stack frame and out "
+ "of range for ocaml GC!");
+ }
+ AP.EmitInt16(K->StackOffset);
}
-
- AP.EmitAlignment(AddressAlignLog);
+
+ AP.EmitAlignment(IntPtrSize == 4 ? 2 : 3);
}
}
}
projects / oota-llvm.git / blobdiff