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[LoongArch] Avoid scheduling tls-desc code sequence in large code model #121541

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merged 2 commits into from
Jan 3, 2025
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[LoongArch] Avoid scheduling tls-desc code sequence in large code model #121541

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[LoongArch] Avoid scheduling tls-desc code sequence in large code model
zhaoqi5 Jan 2, 2025
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zhaoqi5 Jan 3, 2025
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11 changes: 10 additions & 1 deletion llvm/lib/Target/LoongArch/LoongArchInstrInfo.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -406,6 +406,11 @@ bool LoongArchInstrInfo::isSchedulingBoundary(const MachineInstr &MI,
// lu32i.d $a1, %ie64_pc_lo20(s)
// lu52i.d $a1, $a1, %ie64_pc_hi12(s)
//
// * pcalau12i $a0, %desc_pc_hi20(s)
// addi.d $a1, $zero, %desc_pc_lo12(s)
// lu32i.d $a1, %desc64_pc_lo20(s)
// lu52i.d $a1, $a1, %desc64_pc_hi12(s)
//
// For simplicity, only pcalau12i and lu52i.d are marked as scheduling
// boundaries, and the instructions between them are guaranteed to be
// ordered according to data dependencies.
Expand All @@ -430,12 +435,16 @@ bool LoongArchInstrInfo::isSchedulingBoundary(const MachineInstr &MI,
if (MO0 == LoongArchII::MO_IE_PC_HI && MO1 == LoongArchII::MO_IE_PC_LO &&
MO2 == LoongArchII::MO_IE_PC64_LO)
return true;
if (MO0 == LoongArchII::MO_DESC_PC_HI &&
MO1 == LoongArchII::MO_DESC_PC_LO &&
MO2 == LoongArchII::MO_DESC64_PC_LO)
return true;
break;
}
case LoongArch::LU52I_D: {
auto MO = MI.getOperand(2).getTargetFlags();
if (MO == LoongArchII::MO_PCREL64_HI || MO == LoongArchII::MO_GOT_PC64_HI ||
MO == LoongArchII::MO_IE_PC64_HI)
MO == LoongArchII::MO_IE_PC64_HI || MO == LoongArchII::MO_DESC64_PC_HI)
return true;
break;
}
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2 changes: 1 addition & 1 deletion llvm/test/CodeGen/LoongArch/psabi-restricted-scheduling.ll
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Expand Up @@ -252,8 +252,8 @@ define void @baz() nounwind {
; LARGEDESC_SCH: # %bb.0:
; LARGEDESC_SCH-NEXT: addi.d $sp, $sp, -16
; LARGEDESC_SCH-NEXT: st.d $ra, $sp, 8 # 8-byte Folded Spill
; LARGEDESC_SCH-NEXT: addi.d $a1, $zero, %desc_pc_lo12(gd)
; LARGEDESC_SCH-NEXT: pcalau12i $a0, %desc_pc_hi20(gd)
; LARGEDESC_SCH-NEXT: addi.d $a1, $zero, %desc_pc_lo12(gd)
; LARGEDESC_SCH-NEXT: lu32i.d $a1, %desc64_pc_lo20(gd)
; LARGEDESC_SCH-NEXT: lu52i.d $a1, $a1, %desc64_pc_hi12(gd)
; LARGEDESC_SCH-NEXT: add.d $a0, $a0, $a1
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