diff options
Diffstat (limited to 'lib/Target/PowerPC/PPCISelLowering.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCISelLowering.cpp | 77 |
1 files changed, 51 insertions, 26 deletions
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp index c1120d4..436a302 100644 --- a/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/lib/Target/PowerPC/PPCISelLowering.cpp @@ -2451,7 +2451,11 @@ unsigned PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag, SDValue &Chain, DebugLoc dl, int SPDiff, bool isTailCall, SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass, SmallVector<SDValue, 8> &Ops, std::vector<EVT> &NodeTys, - bool isPPC64, bool isSVR4ABI) { + const PPCSubtarget &PPCSubTarget) { + + bool isPPC64 = PPCSubTarget.isPPC64(); + bool isSVR4ABI = PPCSubTarget.isSVR4ABI(); + EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(); NodeTys.push_back(MVT::Other); // Returns a chain NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use. @@ -2464,24 +2468,49 @@ unsigned PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag, Callee = SDValue(Dest, 0); needIndirectCall = false; } - // XXX Work around for http://llvm.org/bugs/show_bug.cgi?id=5201 - // Use indirect calls for ALL functions calls in JIT mode, since the - // far-call stubs may be outside relocation limits for a BL instruction. - if (!DAG.getTarget().getSubtarget<PPCSubtarget>().isJITCodeModel()) { - // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every - // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol - // node so that legalize doesn't hack it. - if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { + + if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { + // XXX Work around for http://llvm.org/bugs/show_bug.cgi?id=5201 + // Use indirect calls for ALL functions calls in JIT mode, since the + // far-call stubs may be outside relocation limits for a BL instruction. + if (!DAG.getTarget().getSubtarget<PPCSubtarget>().isJITCodeModel()) { + unsigned OpFlags = 0; + if (DAG.getTarget().getRelocationModel() != Reloc::Static && + PPCSubTarget.getDarwinVers() < 9 && + (G->getGlobal()->isDeclaration() || + G->getGlobal()->isWeakForLinker())) { + // PC-relative references to external symbols should go through $stub, + // unless we're building with the leopard linker or later, which + // automatically synthesizes these stubs. + OpFlags = PPCII::MO_DARWIN_STUB; + } + + // If the callee is a GlobalAddress/ExternalSymbol node (quite common, + // every direct call is) turn it into a TargetGlobalAddress / + // TargetExternalSymbol node so that legalize doesn't hack it. Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, - Callee.getValueType()); + Callee.getValueType(), + 0, OpFlags); needIndirectCall = false; - } + } } + if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) { - Callee = DAG.getTargetExternalSymbol(S->getSymbol(), - Callee.getValueType()); - needIndirectCall = false; + unsigned char OpFlags = 0; + + if (DAG.getTarget().getRelocationModel() != Reloc::Static && + PPCSubTarget.getDarwinVers() < 9) { + // PC-relative references to external symbols should go through $stub, + // unless we're building with the leopard linker or later, which + // automatically synthesizes these stubs. + OpFlags = PPCII::MO_DARWIN_STUB; + } + + Callee = DAG.getTargetExternalSymbol(S->getSymbol(), Callee.getValueType(), + OpFlags); + needIndirectCall = false; } + if (needIndirectCall) { // Otherwise, this is an indirect call. We have to use a MTCTR/BCTRL pair // to do the call, we can't use PPCISD::CALL. @@ -2628,8 +2657,7 @@ PPCTargetLowering::FinishCall(CallingConv::ID CallConv, DebugLoc dl, SmallVector<SDValue, 8> Ops; unsigned CallOpc = PrepareCall(DAG, Callee, InFlag, Chain, dl, SPDiff, isTailCall, RegsToPass, Ops, NodeTys, - PPCSubTarget.isPPC64(), - PPCSubTarget.isSVR4ABI()); + PPCSubTarget); // When performing tail call optimization the callee pops its arguments off // the stack. Account for this here so these bytes can be pushed back on in @@ -2717,15 +2745,14 @@ PPCTargetLowering::LowerCall(SDValue Chain, SDValue Callee, isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv, isVarArg, Ins, DAG); - if (PPCSubTarget.isSVR4ABI() && !PPCSubTarget.isPPC64()) { + if (PPCSubTarget.isSVR4ABI() && !PPCSubTarget.isPPC64()) return LowerCall_SVR4(Chain, Callee, CallConv, isVarArg, isTailCall, Outs, OutVals, Ins, dl, DAG, InVals); - } else { - return LowerCall_Darwin(Chain, Callee, CallConv, isVarArg, - isTailCall, Outs, OutVals, Ins, - dl, DAG, InVals); - } + + return LowerCall_Darwin(Chain, Callee, CallConv, isVarArg, + isTailCall, Outs, OutVals, Ins, + dl, DAG, InVals); } SDValue @@ -2924,10 +2951,9 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee, InFlag = Chain.getValue(1); } - if (isTailCall) { + if (isTailCall) PrepareTailCall(DAG, InFlag, Chain, dl, false, SPDiff, NumBytes, LROp, FPOp, false, TailCallArguments); - } return FinishCall(CallConv, dl, isTailCall, isVarArg, DAG, RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes, @@ -3293,10 +3319,9 @@ PPCTargetLowering::LowerCall_Darwin(SDValue Chain, SDValue Callee, InFlag = Chain.getValue(1); } - if (isTailCall) { + if (isTailCall) PrepareTailCall(DAG, InFlag, Chain, dl, isPPC64, SPDiff, NumBytes, LROp, FPOp, true, TailCallArguments); - } return FinishCall(CallConv, dl, isTailCall, isVarArg, DAG, RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes, |