diff options
author | Owen Anderson <resistor@mac.com> | 2011-04-05 21:48:57 +0000 |
---|---|---|
committer | Owen Anderson <resistor@mac.com> | 2011-04-05 21:48:57 +0000 |
commit | 76706013131247121a3a153f378946a0cb0e319c (patch) | |
tree | d78dfcb652209e16acf45ed56dc7817ed15c5804 /lib | |
parent | 51fbec9021e180af6e9bb6ec7d0a6ed3bd73a0f3 (diff) | |
download | external_llvm-76706013131247121a3a153f378946a0cb0e319c.zip external_llvm-76706013131247121a3a153f378946a0cb0e319c.tar.gz external_llvm-76706013131247121a3a153f378946a0cb0e319c.tar.bz2 |
Fix bugs in the pseuo-ization of ADCS/SBCS pointed out by Jim, as well as doing the expansion earlier (using a custom inserter) to allow for the chance of predicating these instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128940 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Target/ARM/ARMExpandPseudoInsts.cpp | 47 | ||||
-rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 96 | ||||
-rw-r--r-- | lib/Target/ARM/ARMInstrInfo.td | 13 |
3 files changed, 76 insertions, 80 deletions
diff --git a/lib/Target/ARM/ARMExpandPseudoInsts.cpp b/lib/Target/ARM/ARMExpandPseudoInsts.cpp index 547b27d..a14c952 100644 --- a/lib/Target/ARM/ARMExpandPseudoInsts.cpp +++ b/lib/Target/ARM/ARMExpandPseudoInsts.cpp @@ -55,7 +55,6 @@ namespace { void ExpandVLD(MachineBasicBlock::iterator &MBBI); void ExpandVST(MachineBasicBlock::iterator &MBBI); void ExpandLaneOp(MachineBasicBlock::iterator &MBBI); - void ExpandSBitOp(MachineBasicBlock::iterator &MBBI); void ExpandVTBL(MachineBasicBlock::iterator &MBBI, unsigned Opc, bool IsExt, unsigned NumRegs); void ExpandMOV32BitImm(MachineBasicBlock &MBB, @@ -630,43 +629,6 @@ void ARMExpandPseudo::ExpandVTBL(MachineBasicBlock::iterator &MBBI, MI.eraseFromParent(); } -void ARMExpandPseudo::ExpandSBitOp(MachineBasicBlock::iterator &MBBI) { - MachineInstr &MI = *MBBI; - MachineBasicBlock &MBB = *MI.getParent(); - unsigned OldOpc = MI.getOpcode(); - unsigned Opc = 0; - switch (OldOpc) { - case ARM::ADCSSrr: - Opc = ARM::ADCrr; - break; - case ARM::ADCSSri: - Opc = ARM::ADCri; - break; - case ARM::ADCSSrs: - Opc = ARM::ADCrs; - break; - case ARM::SBCSSrr: - Opc = ARM::SBCrr; - break; - case ARM::SBCSSri: - Opc = ARM::SBCri; - break; - case ARM::SBCSSrs: - Opc = ARM::SBCrs; - break; - default: - llvm_unreachable("Unknown opcode?"); - } - - MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc)); - MIB.addOperand(MachineOperand::CreateImm(0)); // Predicate - MIB.addOperand(MachineOperand::CreateImm(0)); // S bit - for (unsigned i = 0; i < MI.getNumOperands(); ++i) - MIB.addOperand(MI.getOperand(i)); - TransferImpOps(MI, MIB, MIB); - MI.eraseFromParent(); -} - void ARMExpandPseudo::ExpandMOV32BitImm(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI) { MachineInstr &MI = *MBBI; @@ -979,15 +941,6 @@ bool ARMExpandPseudo::ExpandMI(MachineBasicBlock &MBB, ExpandMOV32BitImm(MBB, MBBI); return true; - case ARM::ADCSSri: - case ARM::ADCSSrr: - case ARM::ADCSSrs: - case ARM::SBCSSri: - case ARM::SBCSSrr: - case ARM::SBCSSrs: - ExpandSBitOp(MBBI); - return true; - case ARM::VMOVQQ: { unsigned DstReg = MI.getOperand(0).getReg(); bool DstIsDead = MI.getOperand(0).isDead(); diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index ff2b5e2..21fe962 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -2390,7 +2390,7 @@ ARMTargetLowering::LowerFormalArguments(SDValue Chain, assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered"); int index = ArgLocs[i].getValNo(); - + // Some Ins[] entries become multiple ArgLoc[] entries. // Process them only once. if (index != lastInsIndex) @@ -2966,7 +2966,7 @@ SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const { AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes); SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask, DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes)); - + SDValue Res = DAG.getNode(ISD::OR, dl, OpVT, DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask), DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot)); @@ -4147,7 +4147,7 @@ static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op, DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8, &VTBLMask[0], 8)); - return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2, + return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2, DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8, &VTBLMask[0], 8)); } @@ -4520,7 +4520,7 @@ static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) { DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1)); } -static SDValue +static SDValue LowerSDIV_v4i8(SDValue X, SDValue Y, DebugLoc dl, SelectionDAG &DAG) { // Convert to float // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo)); @@ -4531,7 +4531,7 @@ LowerSDIV_v4i8(SDValue X, SDValue Y, DebugLoc dl, SelectionDAG &DAG) { Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y); // Get reciprocal estimate. // float4 recip = vrecpeq_f32(yf); - Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, + Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), Y); // Because char has a smaller range than uchar, we can actually get away // without any newton steps. This requires that we use a weird bias @@ -4549,7 +4549,7 @@ LowerSDIV_v4i8(SDValue X, SDValue Y, DebugLoc dl, SelectionDAG &DAG) { return X; } -static SDValue +static SDValue LowerSDIV_v4i16(SDValue N0, SDValue N1, DebugLoc dl, SelectionDAG &DAG) { SDValue N2; // Convert to float. @@ -4559,13 +4559,13 @@ LowerSDIV_v4i16(SDValue N0, SDValue N1, DebugLoc dl, SelectionDAG &DAG) { N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1); N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0); N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1); - + // Use reciprocal estimate and one refinement step. // float4 recip = vrecpeq_f32(yf); // recip *= vrecpsq_f32(yf, recip); - N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, + N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), N1); - N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, + N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32), N1, N2); N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2); @@ -4595,15 +4595,15 @@ static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) { SDValue N0 = Op.getOperand(0); SDValue N1 = Op.getOperand(1); SDValue N2, N3; - + if (VT == MVT::v8i8) { N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0); N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1); - + N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, DAG.getIntPtrConstant(4)); N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, - DAG.getIntPtrConstant(4)); + DAG.getIntPtrConstant(4)); N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, DAG.getIntPtrConstant(0)); N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, @@ -4614,7 +4614,7 @@ static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) { N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2); N0 = LowerCONCAT_VECTORS(N0, DAG); - + N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0); return N0; } @@ -4630,32 +4630,32 @@ static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) { SDValue N0 = Op.getOperand(0); SDValue N1 = Op.getOperand(1); SDValue N2, N3; - + if (VT == MVT::v8i8) { N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0); N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1); - + N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, DAG.getIntPtrConstant(4)); N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, - DAG.getIntPtrConstant(4)); + DAG.getIntPtrConstant(4)); N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0, DAG.getIntPtrConstant(0)); N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1, DAG.getIntPtrConstant(0)); - + N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16 N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16 - + N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2); N0 = LowerCONCAT_VECTORS(N0, DAG); - - N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8, + + N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8, DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, MVT::i32), N0); return N0; } - + // v4i16 sdiv ... Convert to float. // float4 yf = vcvt_f32_s32(vmovl_u16(y)); // float4 xf = vcvt_f32_s32(vmovl_u16(x)); @@ -4668,13 +4668,13 @@ static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) { // float4 recip = vrecpeq_f32(yf); // recip *= vrecpsq_f32(yf, recip); // recip *= vrecpsq_f32(yf, recip); - N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, + N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), N1); - N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, + N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32), N1, N2); N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2); - N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, + N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32, DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32), N1, N2); N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2); @@ -5024,6 +5024,48 @@ ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI, case ARM::ATOMIC_CMP_SWAP_I16: return EmitAtomicCmpSwap(MI, BB, 2); case ARM::ATOMIC_CMP_SWAP_I32: return EmitAtomicCmpSwap(MI, BB, 4); + case ARM::ADCSSri: + case ARM::ADCSSrr: + case ARM::ADCSSrs: + case ARM::SBCSSri: + case ARM::SBCSSrr: + case ARM::SBCSSrs: { + unsigned OldOpc = MI->getOpcode(); + unsigned Opc = 0; + switch (OldOpc) { + case ARM::ADCSSrr: + Opc = ARM::ADCrr; + break; + case ARM::ADCSSri: + Opc = ARM::ADCri; + break; + case ARM::ADCSSrs: + Opc = ARM::ADCrs; + break; + case ARM::SBCSSrr: + Opc = ARM::SBCrr; + break; + case ARM::SBCSSri: + Opc = ARM::SBCri; + break; + case ARM::SBCSSrs: + Opc = ARM::SBCrs; + break; + default: + llvm_unreachable("Unknown opcode?"); + } + + MachineInstrBuilder MIB = + BuildMI(*BB, MI, MI->getDebugLoc(), TII->get(Opc)); + for (unsigned i = 0; i < MI->getNumOperands(); ++i) + MIB.addOperand(MI->getOperand(i)); + AddDefaultPred(MIB); + MIB.addReg(ARM::CPSR, RegState::Define); // S bit + MI->eraseFromParent(); + return BB; + } + + case ARM::tMOVCCr_pseudo: { // To "insert" a SELECT_CC instruction, we actually have to insert the // diamond control-flow pattern. The incoming instruction knows the @@ -5326,7 +5368,7 @@ static SDValue PerformMULCombine(SDNode *N, static SDValue PerformANDCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) { - + // Attempt to use immediate-form VBIC BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1)); DebugLoc dl = N->getDebugLoc(); @@ -5851,7 +5893,7 @@ static SDValue CombineBaseUpdate(SDNode *N, EVT VecTy; if (isLoad) VecTy = N->getValueType(0); - else + else VecTy = N->getOperand(AddrOpIdx+1).getValueType(); unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8; if (isLaneOp) @@ -5901,7 +5943,7 @@ static SDValue CombineBaseUpdate(SDNode *N, DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs)); break; - } + } return SDValue(); } diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td index 44b24c1..e5d7fdc 100644 --- a/lib/Target/ARM/ARMInstrInfo.td +++ b/lib/Target/ARM/ARMInstrInfo.td @@ -936,8 +936,7 @@ multiclass AI1_adde_sube_irs<bits<4> opcod, string opc, PatFrag opnode, } // Carry setting variants let isCodeGenOnly = 1, Defs = [CPSR] in { -multiclass AI1_adde_sube_s_irs<bits<4> opcod, string opc, PatFrag opnode, - bit Commutable = 0> { +multiclass AI1_adde_sube_s_irs<PatFrag opnode, bit Commutable = 0> { def Sri : ARMPseudoInst<(outs GPR:$Rd), (ins GPR:$Rn, so_imm:$imm), Size4Bytes, IIC_iALUi, [(set GPR:$Rd, (opnode GPR:$Rn, so_imm:$imm))]>, @@ -2197,10 +2196,12 @@ defm SBC : AI1_adde_sube_irs<0b0110, "sbc", BinOpFrag<(sube_dead_carry node:$LHS, node:$RHS)>>; // ADC and SUBC with 's' bit set. -defm ADCS : AI1_adde_sube_s_irs<0b0101, "adcs", - BinOpFrag<(adde_live_carry node:$LHS, node:$RHS)>, 1>; -defm SBCS : AI1_adde_sube_s_irs<0b0110, "sbcs", - BinOpFrag<(sube_live_carry node:$LHS, node:$RHS) >>; +let usesCustomInserter = 1 in { +defm ADCS : AI1_adde_sube_s_irs< + BinOpFrag<(adde_live_carry node:$LHS, node:$RHS)>, 1>; +defm SBCS : AI1_adde_sube_s_irs< + BinOpFrag<(sube_live_carry node:$LHS, node:$RHS) >>; +} def RSBri : AsI1<0b0011, (outs GPR:$Rd), (ins GPR:$Rn, so_imm:$imm), DPFrm, IIC_iALUi, "rsb", "\t$Rd, $Rn, $imm", |