-//===- ARMJITInfo.h - ARM implementation of the JIT interface --*- C++ -*-===//
+//===-- ARMJITInfo.h - ARM implementation of the JIT interface -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
-#ifndef ARMJITINFO_H
-#define ARMJITINFO_H
+#ifndef LLVM_LIB_TARGET_ARM_ARMJITINFO_H
+#define LLVM_LIB_TARGET_ARM_ARMJITINFO_H
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/Target/TargetJITInfo.h"
namespace llvm {
class ARMTargetMachine;
class ARMJITInfo : public TargetJITInfo {
- ARMTargetMachine &TM;
+ // ConstPoolId2AddrMap - A map from constant pool ids to the corresponding
+ // CONSTPOOL_ENTRY addresses.
+ SmallVector<intptr_t, 16> ConstPoolId2AddrMap;
+
+ // JumpTableId2AddrMap - A map from inline jumptable ids to the
+ // corresponding inline jump table bases.
+ SmallVector<intptr_t, 16> JumpTableId2AddrMap;
+
+ // PCLabelMap - A map from PC labels to addresses.
+ DenseMap<unsigned, intptr_t> PCLabelMap;
+
+ // Sym2IndirectSymMap - A map from symbol (GlobalValue and ExternalSymbol)
+ // addresses to their indirect symbol addresses.
+ DenseMap<void*, intptr_t> Sym2IndirectSymMap;
+
+ // IsPIC - True if the relocation model is PIC. This is used to determine
+ // how to codegen function stubs.
+ bool IsPIC;
+
public:
- explicit ARMJITInfo(ARMTargetMachine &tm) : TM(tm) {useGOT = 0;}
+ explicit ARMJITInfo() : IsPIC(false) { useGOT = false; }
/// replaceMachineCodeForFunction - Make it so that calling the function
/// whose machine code is at OLD turns into a call to NEW, perhaps by
/// overwriting OLD with a branch to NEW. This is used for self-modifying
/// code.
///
- virtual void replaceMachineCodeForFunction(void *Old, void *New);
+ void replaceMachineCodeForFunction(void *Old, void *New) override;
+
+ /// emitGlobalValueIndirectSym - Use the specified JITCodeEmitter object
+ /// to emit an indirect symbol which contains the address of the specified
+ /// ptr.
+ void *emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr,
+ JITCodeEmitter &JCE) override;
- /// emitFunctionStub - Use the specified MachineCodeEmitter object to emit a
+ // getStubLayout - Returns the size and alignment of the largest call stub
+ // on ARM.
+ StubLayout getStubLayout() override;
+
+ /// emitFunctionStub - Use the specified JITCodeEmitter object to emit a
/// small native function that simply calls the function at the specified
/// address.
- virtual void *emitFunctionStub(const Function* F, void *Fn,
- MachineCodeEmitter &MCE);
+ void *emitFunctionStub(const Function* F, void *Fn,
+ JITCodeEmitter &JCE) override;
/// getLazyResolverFunction - Expose the lazy resolver to the JIT.
- virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn);
+ LazyResolverFn getLazyResolverFunction(JITCompilerFn) override;
/// relocate - Before the JIT can run a block of code that has been emitted,
/// it must rewrite the code to contain the actual addresses of any
/// referenced global symbols.
- virtual void relocate(void *Function, MachineRelocation *MR,
- unsigned NumRelocs, unsigned char* GOTBase);
+ void relocate(void *Function, MachineRelocation *MR,
+ unsigned NumRelocs, unsigned char* GOTBase) override;
+
+ /// hasCustomConstantPool - Allows a target to specify that constant
+ /// pool address resolution is handled by the target.
+ bool hasCustomConstantPool() const override { return true; }
+
+ /// hasCustomJumpTables - Allows a target to specify that jumptables
+ /// are emitted by the target.
+ bool hasCustomJumpTables() const override { return true; }
+
+ /// allocateSeparateGVMemory - If true, globals should be placed in
+ /// separately allocated heap memory rather than in the same
+ /// code memory allocated by JITCodeEmitter.
+ bool allocateSeparateGVMemory() const override {
+#ifdef __APPLE__
+ return true;
+#else
+ return false;
+#endif
+ }
+
+ /// Initialize - Initialize internal stage for the function being JITted.
+ /// Resize constant pool ids to CONSTPOOL_ENTRY addresses map; resize
+ /// jump table ids to jump table bases map; remember if codegen relocation
+ /// model is PIC.
+ void Initialize(const MachineFunction &MF, bool isPIC);
+
+ /// getConstantPoolEntryAddr - The ARM target puts all constant
+ /// pool entries into constant islands. This returns the address of the
+ /// constant pool entry of the specified index.
+ intptr_t getConstantPoolEntryAddr(unsigned CPI) const {
+ assert(CPI < ConstPoolId2AddrMap.size());
+ return ConstPoolId2AddrMap[CPI];
+ }
+
+ /// addConstantPoolEntryAddr - Map a Constant Pool Index to the address
+ /// where its associated value is stored. When relocations are processed,
+ /// this value will be used to resolve references to the constant.
+ void addConstantPoolEntryAddr(unsigned CPI, intptr_t Addr) {
+ assert(CPI < ConstPoolId2AddrMap.size());
+ ConstPoolId2AddrMap[CPI] = Addr;
+ }
+
+ /// getJumpTableBaseAddr - The ARM target inline all jump tables within
+ /// text section of the function. This returns the address of the base of
+ /// the jump table of the specified index.
+ intptr_t getJumpTableBaseAddr(unsigned JTI) const {
+ assert(JTI < JumpTableId2AddrMap.size());
+ return JumpTableId2AddrMap[JTI];
+ }
+
+ /// addJumpTableBaseAddr - Map a jump table index to the address where
+ /// the corresponding inline jump table is emitted. When relocations are
+ /// processed, this value will be used to resolve references to the
+ /// jump table.
+ void addJumpTableBaseAddr(unsigned JTI, intptr_t Addr) {
+ assert(JTI < JumpTableId2AddrMap.size());
+ JumpTableId2AddrMap[JTI] = Addr;
+ }
+
+ /// getPCLabelAddr - Retrieve the address of the PC label of the
+ /// specified id.
+ intptr_t getPCLabelAddr(unsigned Id) const {
+ DenseMap<unsigned, intptr_t>::const_iterator I = PCLabelMap.find(Id);
+ assert(I != PCLabelMap.end());
+ return I->second;
+ }
+
+ /// addPCLabelAddr - Remember the address of the specified PC label.
+ void addPCLabelAddr(unsigned Id, intptr_t Addr) {
+ PCLabelMap.insert(std::make_pair(Id, Addr));
+ }
+
+ /// getIndirectSymAddr - Retrieve the address of the indirect symbol of the
+ /// specified symbol located at address. Returns 0 if the indirect symbol
+ /// has not been emitted.
+ intptr_t getIndirectSymAddr(void *Addr) const {
+ DenseMap<void*,intptr_t>::const_iterator I= Sym2IndirectSymMap.find(Addr);
+ if (I != Sym2IndirectSymMap.end())
+ return I->second;
+ return 0;
+ }
+
+ /// addIndirectSymAddr - Add a mapping from address of an emitted symbol to
+ /// its indirect symbol address.
+ void addIndirectSymAddr(void *SymAddr, intptr_t IndSymAddr) {
+ Sym2IndirectSymMap.insert(std::make_pair(SymAddr, IndSymAddr));
+ }
+
+ private:
+ /// resolveRelocDestAddr - Resolve the resulting address of the relocation
+ /// if it's not already solved. Constantpool entries must be resolved by
+ /// ARM target.
+ intptr_t resolveRelocDestAddr(MachineRelocation *MR) const;
};
}
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