diff options
Diffstat (limited to 'include/llvm/CodeGen')
| -rw-r--r-- | include/llvm/CodeGen/MachineRelocation.h | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/include/llvm/CodeGen/MachineRelocation.h b/include/llvm/CodeGen/MachineRelocation.h index 6ea8f07..1c15fab 100644 --- a/include/llvm/CodeGen/MachineRelocation.h +++ b/include/llvm/CodeGen/MachineRelocation.h @@ -65,7 +65,7 @@ class MachineRelocation { 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 @@ -81,7 +81,7 @@ public: /// 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; @@ -89,7 +89,7 @@ public: 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; @@ -101,7 +101,7 @@ public: 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; @@ -109,7 +109,7 @@ public: 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; @@ -126,7 +126,7 @@ public: 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; @@ -145,7 +145,7 @@ public: 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; @@ -164,7 +164,7 @@ public: 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; @@ -183,7 +183,7 @@ public: 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; @@ -258,12 +258,14 @@ public: 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 |