return MBB.erase(MI);
}
+bool LoongArchFrameLowering::spillCalleeSavedRegisters(
+ MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
+ ArrayRef<CalleeSavedInfo> CSI, const TargetRegisterInfo *TRI) const {
+ if (CSI.empty())
+ return true;
+
+ MachineFunction *MF = MBB.getParent();
+ const TargetInstrInfo &TII = *MF->getSubtarget().getInstrInfo();
+
+ // Insert the spill to the stack frame.
+ for (auto &CS : CSI) {
+ Register Reg = CS.getReg();
+ // If the register is RA and the return address is taken by method
+ // LoongArchTargetLowering::lowerRETURNADDR, don't set kill flag.
+ bool IsKill =
+ !(Reg == LoongArch::R1 && MF->getFrameInfo().isReturnAddressTaken());
+ const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
+ TII.storeRegToStackSlot(MBB, MI, Reg, IsKill, CS.getFrameIdx(), RC, TRI);
+ }
+
+ return true;
+}
+
StackOffset LoongArchFrameLowering::getFrameIndexReference(
const MachineFunction &MF, int FI, Register &FrameReg) const {
const MachineFrameInfo &MFI = MF.getFrameInfo();
--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -O0 --mtriple=loongarch64 --verify-machineinstrs < %s | FileCheck %s
+
+;; This test case is reduced from pr17377.c of the GCC C Torture Suite using
+;; bugpoint.
+
+@calls = external dso_local global i32, align 4
+declare ptr @llvm.returnaddress(i32 immarg)
+
+define dso_local ptr @f(i32 noundef signext %i) "frame-pointer"="all" {
+; CHECK-LABEL: f:
+; CHECK: # %bb.0: # %entry
+; CHECK-NEXT: addi.d $sp, $sp, -48
+; CHECK-NEXT: .cfi_def_cfa_offset 48
+; CHECK-NEXT: st.d $ra, $sp, 40 # 8-byte Folded Spill
+; CHECK-NEXT: st.d $fp, $sp, 32 # 8-byte Folded Spill
+; CHECK-NEXT: .cfi_offset 1, -8
+; CHECK-NEXT: .cfi_offset 22, -16
+; CHECK-NEXT: addi.d $fp, $sp, 48
+; CHECK-NEXT: .cfi_def_cfa 22, 0
+; CHECK-NEXT: st.d $ra, $fp, -40 # 8-byte Folded Spill
+; CHECK-NEXT: move $a1, $a0
+; CHECK-NEXT: pcalau12i $a0, %pc_hi20(calls)
+; CHECK-NEXT: addi.d $a3, $a0, %pc_lo12(calls)
+; CHECK-NEXT: ld.wu $a0, $a3, 0
+; CHECK-NEXT: addi.d $a2, $a0, 1
+; CHECK-NEXT: st.w $a2, $a3, 0
+; CHECK-NEXT: st.w $a1, $fp, -28
+; CHECK-NEXT: bnez $a0, .LBB0_2
+; CHECK-NEXT: b .LBB0_1
+; CHECK-NEXT: .LBB0_1: # %if.then
+; CHECK-NEXT: ld.d $a0, $fp, -40 # 8-byte Folded Reload
+; CHECK-NEXT: st.d $a0, $fp, -24
+; CHECK-NEXT: b .LBB0_7
+; CHECK-NEXT: .LBB0_2: # %if.end
+; CHECK-NEXT: ld.wu $a0, $fp, -28
+; CHECK-NEXT: st.d $a0, $fp, -48 # 8-byte Folded Spill
+; CHECK-NEXT: beqz $a0, .LBB0_5
+; CHECK-NEXT: b .LBB0_3
+; CHECK-NEXT: .LBB0_3: # %if.end
+; CHECK-NEXT: ld.d $a0, $fp, -48 # 8-byte Folded Reload
+; CHECK-NEXT: ori $a1, $zero, 1
+; CHECK-NEXT: bne $a0, $a1, .LBB0_6
+; CHECK-NEXT: b .LBB0_4
+; CHECK-NEXT: .LBB0_4: # %sw.bb
+; CHECK-NEXT: pcalau12i $a0, %pc_hi20(f)
+; CHECK-NEXT: addi.d $a0, $a0, %pc_lo12(f)
+; CHECK-NEXT: st.d $a0, $fp, -24
+; CHECK-NEXT: b .LBB0_7
+; CHECK-NEXT: .LBB0_5: # %sw.bb1
+; CHECK-NEXT: ld.d $a0, $fp, -40 # 8-byte Folded Reload
+; CHECK-NEXT: st.d $a0, $fp, -24
+; CHECK-NEXT: b .LBB0_7
+; CHECK-NEXT: .LBB0_6: # %sw.epilog
+; CHECK-NEXT: move $a0, $zero
+; CHECK-NEXT: st.d $a0, $fp, -24
+; CHECK-NEXT: b .LBB0_7
+; CHECK-NEXT: .LBB0_7: # %return
+; CHECK-NEXT: ld.d $a0, $fp, -24
+; CHECK-NEXT: ld.d $fp, $sp, 32 # 8-byte Folded Reload
+; CHECK-NEXT: ld.d $ra, $sp, 40 # 8-byte Folded Reload
+; CHECK-NEXT: addi.d $sp, $sp, 48
+; CHECK-NEXT: ret
+entry:
+ %retval = alloca ptr, align 8
+ %i.addr = alloca i32, align 4
+ store i32 %i, ptr %i.addr, align 4
+ %0 = load i32, ptr @calls, align 4
+ %inc = add nsw i32 %0, 1
+ store i32 %inc, ptr @calls, align 4
+ %cmp = icmp eq i32 %0, 0
+ br i1 %cmp, label %if.then, label %if.end
+
+if.then:
+ %1 = call ptr @llvm.returnaddress(i32 0)
+ store ptr %1, ptr %retval, align 8
+ br label %return
+
+if.end:
+ %2 = load i32, ptr %i.addr, align 4
+ switch i32 %2, label %sw.epilog [
+ i32 1, label %sw.bb
+ i32 0, label %sw.bb1
+ ]
+
+sw.bb:
+ store ptr @f, ptr %retval, align 8
+ br label %return
+
+sw.bb1:
+ %3 = call ptr @llvm.returnaddress(i32 0)
+ store ptr %3, ptr %retval, align 8
+ br label %return
+
+sw.epilog:
+ store ptr null, ptr %retval, align 8
+ br label %return
+
+return:
+ %4 = load ptr, ptr %retval, align 8
+ ret ptr %4
+}