/// CallRequiresGOTInRegister - Check whether the call requires the GOT pointer
/// in a register before calling.
-static bool CallRequiresGOTPtrInReg(const TargetMachine &TM,
- bool IsTailCall) {
+static bool CallRequiresGOTPtrInReg(const TargetMachine &TM) {
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
- return !IsTailCall && !Subtarget.is64Bit() &&
- TM.getRelocationModel() == Reloc::PIC_ &&
+ return TM.getRelocationModel() == Reloc::PIC_ &&
Subtarget.isPICStyleGOT();
}
/// CallRequiresFnAddressInReg - Check whether the call requires the function
/// address to be loaded in a register.
-static bool CallRequiresFnAddressInReg(const TargetMachine &TM,
- bool IsTailCall) {
+static bool CallRequiresFnAddressInReg(const TargetMachine &TM) {
const X86Subtarget &Subtarget = TM.getSubtarget<X86Subtarget>();
- return !Subtarget.is64Bit() && IsTailCall &&
- TM.getRelocationModel() == Reloc::PIC_ &&
+ return TM.getRelocationModel() == Reloc::PIC_ &&
Subtarget.isPICStyleGOT();
}
// ELF / PIC requires GOT in the EBX register before function calls via PLT
// GOT pointer.
- if (CallRequiresGOTPtrInReg(getTargetMachine(), IsTailCall)) {
+ if (!IsTailCall && CallRequiresGOTPtrInReg(getTargetMachine())) {
Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
DAG.getNode(X86ISD::GlobalBaseReg,
DebugLoc::getUnknownLoc(),
// calls on PIC/GOT architectures. Normally we would just put the address of
// GOT into ebx and then call target@PLT. But for tail calls ebx would be
// restored (since ebx is callee saved) before jumping to the target@PLT.
- if (CallRequiresFnAddressInReg(getTargetMachine(), IsTailCall)) {
+ if (IsTailCall && CallRequiresFnAddressInReg(getTargetMachine())) {
// Note: The actual moving to ecx is done further down.
GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
if (G && !G->getGlobal()->hasHiddenVisibility() &&