#ifndef LLVM_CODEGEN_MACHINERELOCATION_H
#define LLVM_CODEGEN_MACHINERELOCATION_H
-#include "llvm/Support/DataTypes.h"
+#include "llvm/System/DataTypes.h"
#include <cassert>
namespace llvm {
unsigned TargetReloType : 6; // The target relocation ID
AddressType AddrType : 4; // The field of Target to use
- bool NeedStub : 1; // True if this relocation requires a stub
+ bool MayNeedFarStub : 1; // True if this relocation may require a far-stub
bool GOTRelative : 1; // Should this relocation be relative to the GOT?
bool TargetResolve : 1; // True if target should resolve the address
///
static MachineRelocation getGV(uintptr_t offset, unsigned RelocationType,
GlobalValue *GV, intptr_t cst = 0,
- bool NeedStub = 0,
+ bool MayNeedFarStub = 0,
bool GOTrelative = 0) {
assert((RelocationType & ~63) == 0 && "Relocation type too large!");
MachineRelocation Result;
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isGV;
- Result.NeedStub = NeedStub;
+ Result.MayNeedFarStub = MayNeedFarStub;
Result.GOTRelative = GOTrelative;
Result.TargetResolve = false;
Result.Target.GV = GV;
static MachineRelocation getIndirectSymbol(uintptr_t offset,
unsigned RelocationType,
GlobalValue *GV, intptr_t cst = 0,
- bool NeedStub = 0,
+ bool MayNeedFarStub = 0,
bool GOTrelative = 0) {
assert((RelocationType & ~63) == 0 && "Relocation type too large!");
MachineRelocation Result;
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isIndirectSym;
- Result.NeedStub = NeedStub;
+ Result.MayNeedFarStub = MayNeedFarStub;
Result.GOTRelative = GOTrelative;
Result.TargetResolve = false;
Result.Target.GV = GV;
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isBB;
- Result.NeedStub = false;
+ Result.MayNeedFarStub = false;
Result.GOTRelative = false;
Result.TargetResolve = false;
Result.Target.MBB = MBB;
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isExtSym;
- Result.NeedStub = true;
+ Result.MayNeedFarStub = true;
Result.GOTRelative = GOTrelative;
Result.TargetResolve = false;
Result.Target.ExtSym = ES;
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isConstPool;
- Result.NeedStub = false;
+ Result.MayNeedFarStub = false;
Result.GOTRelative = false;
Result.TargetResolve = letTargetResolve;
Result.Target.Index = CPI;
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isJumpTable;
- Result.NeedStub = false;
+ Result.MayNeedFarStub = false;
Result.GOTRelative = false;
Result.TargetResolve = letTargetResolve;
Result.Target.Index = JTI;
return GOTRelative;
}
- /// doesntNeedStub - This function returns true if the JIT for this target
- /// target is capable of directly handling the relocated GlobalValue reference
- /// without using either a stub function or issuing an extra load to get the
- /// GV address.
- bool doesntNeedStub() const {
- return !NeedStub;
+ /// mayNeedFarStub - This function returns true if the JIT for this target may
+ /// need either a stub function or an indirect global-variable load to handle
+ /// the relocated GlobalValue reference. For example, the x86-64 call
+ /// instruction can only call functions within +/-2GB of the call site.
+ /// Anything farther away needs a longer mov+call sequence, which can't just
+ /// be written on top of the existing call.
+ bool mayNeedFarStub() const {
+ return MayNeedFarStub;
}
/// letTargetResolve - Return true if the target JITInfo is usually