================
@@ -940,6 +945,240 @@ bool SystemZTargetLowering::isFPImmLegal(const APFloat
&Imm, EVT VT,
return SystemZVectorConstantInfo(Imm).isVectorConstantLegal(Subtarget);
}
+MachineBasicBlock *
+SystemZTargetLowering::emitEHSjLjSetJmp(MachineInstr &MI,
+ MachineBasicBlock *MBB) const {
+ DebugLoc DL = MI.getDebugLoc();
+ const TargetInstrInfo *TII = Subtarget.getInstrInfo();
+ const SystemZRegisterInfo *TRI = Subtarget.getRegisterInfo();
+
+ MachineFunction *MF = MBB->getParent();
+ MachineRegisterInfo &MRI = MF->getRegInfo();
+
+ const BasicBlock *BB = MBB->getBasicBlock();
+ MachineFunction::iterator I = ++MBB->getIterator();
+
+ Register DstReg = MI.getOperand(0).getReg();
+ const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
+ assert(TRI->isTypeLegalForClass(*RC, MVT::i32) && "Invalid destination!");
+ Register mainDstReg = MRI.createVirtualRegister(RC);
+ Register restoreDstReg = MRI.createVirtualRegister(RC);
+
+ MVT PVT = getPointerTy(MF->getDataLayout());
+ assert((PVT == MVT::i64 || PVT == MVT::i32) && "Invalid Pointer Size!");
+ // For v = setjmp(buf), we generate.
+ // Algorithm:
+ //
+ // ---------
+ // | thisMBB |
+ // ---------
+ // |
+ // ------------------------
+ // | |
+ // ---------- ---------------
+ // | mainMBB | | restoreMBB |
+ // | v = 0 | | v = 1 |
+ // ---------- ---------------
+ // | |
+ // -------------------------
+ // |
+ // -----------------------------
+ // | sinkMBB |
+ // | phi(v_mainMBB,v_restoreMBB) |
+ // -----------------------------
+ // thisMBB:
+ // buf[0] = Frame Pointer if hasFP.
----------------
uweigand wrote:
Use `FPOffset` here to be consistent with the code below.
https://github.com/llvm/llvm-project/pull/116642
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