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d5d2baec26
cannot be directly interchanged for comparisons against negated values. Disable the CMN instructions for the time being. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94119 91177308-0d34-0410-b5e6-96231b3b80d8
921 lines
35 KiB
TableGen
921 lines
35 KiB
TableGen
//===- ARMInstrThumb.td - Thumb support for ARM ---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file describes the Thumb instruction set.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Thumb specific DAG Nodes.
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//
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def ARMtcall : SDNode<"ARMISD::tCALL", SDT_ARMcall,
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[SDNPHasChain, SDNPOptInFlag, SDNPOutFlag]>;
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def imm_neg_XFORM : SDNodeXForm<imm, [{
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return CurDAG->getTargetConstant(-(int)N->getZExtValue(), MVT::i32);
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}]>;
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def imm_comp_XFORM : SDNodeXForm<imm, [{
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return CurDAG->getTargetConstant(~((uint32_t)N->getZExtValue()), MVT::i32);
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}]>;
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/// imm0_7 predicate - True if the 32-bit immediate is in the range [0,7].
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def imm0_7 : PatLeaf<(i32 imm), [{
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return (uint32_t)N->getZExtValue() < 8;
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}]>;
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def imm0_7_neg : PatLeaf<(i32 imm), [{
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return (uint32_t)-N->getZExtValue() < 8;
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}], imm_neg_XFORM>;
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def imm0_255 : PatLeaf<(i32 imm), [{
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return (uint32_t)N->getZExtValue() < 256;
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}]>;
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def imm0_255_comp : PatLeaf<(i32 imm), [{
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return ~((uint32_t)N->getZExtValue()) < 256;
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}]>;
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def imm8_255 : PatLeaf<(i32 imm), [{
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return (uint32_t)N->getZExtValue() >= 8 && (uint32_t)N->getZExtValue() < 256;
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}]>;
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def imm8_255_neg : PatLeaf<(i32 imm), [{
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unsigned Val = -N->getZExtValue();
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return Val >= 8 && Val < 256;
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}], imm_neg_XFORM>;
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// Break imm's up into two pieces: an immediate + a left shift.
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// This uses thumb_immshifted to match and thumb_immshifted_val and
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// thumb_immshifted_shamt to get the val/shift pieces.
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def thumb_immshifted : PatLeaf<(imm), [{
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return ARM_AM::isThumbImmShiftedVal((unsigned)N->getZExtValue());
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}]>;
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def thumb_immshifted_val : SDNodeXForm<imm, [{
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unsigned V = ARM_AM::getThumbImmNonShiftedVal((unsigned)N->getZExtValue());
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return CurDAG->getTargetConstant(V, MVT::i32);
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}]>;
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def thumb_immshifted_shamt : SDNodeXForm<imm, [{
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unsigned V = ARM_AM::getThumbImmValShift((unsigned)N->getZExtValue());
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return CurDAG->getTargetConstant(V, MVT::i32);
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}]>;
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// Scaled 4 immediate.
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def t_imm_s4 : Operand<i32> {
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let PrintMethod = "printThumbS4ImmOperand";
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}
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// Define Thumb specific addressing modes.
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// t_addrmode_rr := reg + reg
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//
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def t_addrmode_rr : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeRR", []> {
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let PrintMethod = "printThumbAddrModeRROperand";
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let MIOperandInfo = (ops tGPR:$base, tGPR:$offsreg);
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}
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// t_addrmode_s4 := reg + reg
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// reg + imm5 * 4
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//
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def t_addrmode_s4 : Operand<i32>,
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ComplexPattern<i32, 3, "SelectThumbAddrModeS4", []> {
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let PrintMethod = "printThumbAddrModeS4Operand";
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let MIOperandInfo = (ops tGPR:$base, i32imm:$offsimm, tGPR:$offsreg);
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}
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// t_addrmode_s2 := reg + reg
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// reg + imm5 * 2
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//
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def t_addrmode_s2 : Operand<i32>,
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ComplexPattern<i32, 3, "SelectThumbAddrModeS2", []> {
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let PrintMethod = "printThumbAddrModeS2Operand";
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let MIOperandInfo = (ops tGPR:$base, i32imm:$offsimm, tGPR:$offsreg);
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}
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// t_addrmode_s1 := reg + reg
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// reg + imm5
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//
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def t_addrmode_s1 : Operand<i32>,
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ComplexPattern<i32, 3, "SelectThumbAddrModeS1", []> {
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let PrintMethod = "printThumbAddrModeS1Operand";
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let MIOperandInfo = (ops tGPR:$base, i32imm:$offsimm, tGPR:$offsreg);
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}
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// t_addrmode_sp := sp + imm8 * 4
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//
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def t_addrmode_sp : Operand<i32>,
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ComplexPattern<i32, 2, "SelectThumbAddrModeSP", []> {
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let PrintMethod = "printThumbAddrModeSPOperand";
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let MIOperandInfo = (ops GPR:$base, i32imm:$offsimm);
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}
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//===----------------------------------------------------------------------===//
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// Miscellaneous Instructions.
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//
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let Defs = [SP], Uses = [SP] in {
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def tADJCALLSTACKUP :
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PseudoInst<(outs), (ins i32imm:$amt1, i32imm:$amt2), NoItinerary,
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"@ tADJCALLSTACKUP $amt1",
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[(ARMcallseq_end imm:$amt1, imm:$amt2)]>, Requires<[IsThumb1Only]>;
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def tADJCALLSTACKDOWN :
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PseudoInst<(outs), (ins i32imm:$amt), NoItinerary,
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"@ tADJCALLSTACKDOWN $amt",
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[(ARMcallseq_start imm:$amt)]>, Requires<[IsThumb1Only]>;
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}
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// For both thumb1 and thumb2.
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let isNotDuplicable = 1 in
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def tPICADD : TIt<(outs GPR:$dst), (ins GPR:$lhs, pclabel:$cp), IIC_iALUr,
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"\n$cp:\n\tadd\t$dst, pc",
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[(set GPR:$dst, (ARMpic_add GPR:$lhs, imm:$cp))]>,
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T1Special<{0,0,?,?}> {
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let Inst{6-3} = 0b1111; // A8.6.6 Rm = pc
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}
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// PC relative add.
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def tADDrPCi : T1I<(outs tGPR:$dst), (ins t_imm_s4:$rhs), IIC_iALUi,
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"add\t$dst, pc, $rhs", []>,
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T1Encoding<{1,0,1,0,0,?}>; // A6.2 & A8.6.10
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// ADD rd, sp, #imm8
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def tADDrSPi : T1I<(outs tGPR:$dst), (ins GPR:$sp, t_imm_s4:$rhs), IIC_iALUi,
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"add\t$dst, $sp, $rhs", []>,
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T1Encoding<{1,0,1,0,1,?}>; // A6.2 & A8.6.8
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// ADD sp, sp, #imm7
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def tADDspi : TIt<(outs GPR:$dst), (ins GPR:$lhs, t_imm_s4:$rhs), IIC_iALUi,
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"add\t$dst, $rhs", []>,
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T1Misc<{0,0,0,0,0,?,?}>; // A6.2.5 & A8.6.8
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// SUB sp, sp, #imm7
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def tSUBspi : TIt<(outs GPR:$dst), (ins GPR:$lhs, t_imm_s4:$rhs), IIC_iALUi,
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"sub\t$dst, $rhs", []>,
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T1Misc<{0,0,0,0,1,?,?}>; // A6.2.5 & A8.6.215
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// ADD rm, sp
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def tADDrSP : TIt<(outs GPR:$dst), (ins GPR:$lhs, GPR:$rhs), IIC_iALUr,
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"add\t$dst, $rhs", []>,
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T1Special<{0,0,?,?}> {
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let Inst{6-3} = 0b1101; // A8.6.9 Encoding T1
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}
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// ADD sp, rm
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def tADDspr : TIt<(outs GPR:$dst), (ins GPR:$lhs, GPR:$rhs), IIC_iALUr,
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"add\t$dst, $rhs", []>,
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T1Special<{0,0,?,?}> {
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// A8.6.9 Encoding T2
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let Inst{7} = 1;
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let Inst{2-0} = 0b101;
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}
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// Pseudo instruction that will expand into a tSUBspi + a copy.
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let usesCustomInserter = 1 in { // Expanded after instruction selection.
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def tSUBspi_ : PseudoInst<(outs GPR:$dst), (ins GPR:$lhs, t_imm_s4:$rhs),
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NoItinerary, "@ sub\t$dst, $rhs", []>;
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def tADDspr_ : PseudoInst<(outs GPR:$dst), (ins GPR:$lhs, GPR:$rhs),
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NoItinerary, "@ add\t$dst, $rhs", []>;
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let Defs = [CPSR] in
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def tANDsp : PseudoInst<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs),
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NoItinerary, "@ and\t$dst, $rhs", []>;
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} // usesCustomInserter
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//===----------------------------------------------------------------------===//
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// Control Flow Instructions.
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//
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let isReturn = 1, isTerminator = 1, isBarrier = 1 in {
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def tBX_RET : TI<(outs), (ins), IIC_Br, "bx\tlr", [(ARMretflag)]>,
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T1Special<{1,1,0,?}> { // A6.2.3 & A8.6.25
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let Inst{6-3} = 0b1110; // Rm = lr
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}
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// Alternative return instruction used by vararg functions.
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def tBX_RET_vararg : TI<(outs), (ins tGPR:$target), IIC_Br, "bx\t$target", []>,
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T1Special<{1,1,0,?}>; // A6.2.3 & A8.6.25
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}
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// Indirect branches
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let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
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def tBRIND : TI<(outs), (ins GPR:$dst), IIC_Br, "mov\tpc, $dst",
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[(brind GPR:$dst)]>,
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T1Special<{1,0,1,?}> {
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// <Rd> = Inst{7:2-0} = pc
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let Inst{2-0} = 0b111;
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}
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}
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// FIXME: remove when we have a way to marking a MI with these properties.
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let isReturn = 1, isTerminator = 1, isBarrier = 1, mayLoad = 1,
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hasExtraDefRegAllocReq = 1 in
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def tPOP_RET : T1I<(outs), (ins pred:$p, reglist:$wb, variable_ops), IIC_Br,
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"pop${p}\t$wb", []>,
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T1Misc<{1,1,0,?,?,?,?}>;
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let isCall = 1,
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Defs = [R0, R1, R2, R3, R12, LR,
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D0, D1, D2, D3, D4, D5, D6, D7,
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D16, D17, D18, D19, D20, D21, D22, D23,
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D24, D25, D26, D27, D28, D29, D30, D31, CPSR, FPSCR] in {
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// Also used for Thumb2
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def tBL : TIx2<0b11110, 0b11, 1,
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(outs), (ins i32imm:$func, variable_ops), IIC_Br,
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"bl\t${func:call}",
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[(ARMtcall tglobaladdr:$func)]>,
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Requires<[IsThumb, IsNotDarwin]>;
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// ARMv5T and above, also used for Thumb2
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def tBLXi : TIx2<0b11110, 0b11, 0,
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(outs), (ins i32imm:$func, variable_ops), IIC_Br,
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"blx\t${func:call}",
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[(ARMcall tglobaladdr:$func)]>,
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Requires<[IsThumb, HasV5T, IsNotDarwin]>;
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// Also used for Thumb2
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def tBLXr : TI<(outs), (ins GPR:$func, variable_ops), IIC_Br,
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"blx\t$func",
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[(ARMtcall GPR:$func)]>,
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Requires<[IsThumb, HasV5T, IsNotDarwin]>,
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T1Special<{1,1,1,?}>; // A6.2.3 & A8.6.24;
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// ARMv4T
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def tBX : TIx2<{?,?,?,?,?}, {?,?}, ?,
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(outs), (ins tGPR:$func, variable_ops), IIC_Br,
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"mov\tlr, pc\n\tbx\t$func",
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[(ARMcall_nolink tGPR:$func)]>,
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Requires<[IsThumb1Only, IsNotDarwin]>;
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}
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// On Darwin R9 is call-clobbered.
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let isCall = 1,
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Defs = [R0, R1, R2, R3, R9, R12, LR,
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D0, D1, D2, D3, D4, D5, D6, D7,
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D16, D17, D18, D19, D20, D21, D22, D23,
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D24, D25, D26, D27, D28, D29, D30, D31, CPSR, FPSCR] in {
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// Also used for Thumb2
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def tBLr9 : TIx2<0b11110, 0b11, 1,
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(outs), (ins i32imm:$func, variable_ops), IIC_Br,
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"bl\t${func:call}",
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[(ARMtcall tglobaladdr:$func)]>,
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Requires<[IsThumb, IsDarwin]>;
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// ARMv5T and above, also used for Thumb2
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def tBLXi_r9 : TIx2<0b11110, 0b11, 0,
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(outs), (ins i32imm:$func, variable_ops), IIC_Br,
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"blx\t${func:call}",
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[(ARMcall tglobaladdr:$func)]>,
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Requires<[IsThumb, HasV5T, IsDarwin]>;
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// Also used for Thumb2
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def tBLXr_r9 : TI<(outs), (ins GPR:$func, variable_ops), IIC_Br,
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"blx\t$func",
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[(ARMtcall GPR:$func)]>,
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Requires<[IsThumb, HasV5T, IsDarwin]>,
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T1Special<{1,1,1,?}>; // A6.2.3 & A8.6.24
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// ARMv4T
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def tBXr9 : TIx2<{?,?,?,?,?}, {?,?}, ?,
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(outs), (ins tGPR:$func, variable_ops), IIC_Br,
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"mov\tlr, pc\n\tbx\t$func",
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[(ARMcall_nolink tGPR:$func)]>,
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Requires<[IsThumb1Only, IsDarwin]>;
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}
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let isBranch = 1, isTerminator = 1 in {
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let isBarrier = 1 in {
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let isPredicable = 1 in
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def tB : T1I<(outs), (ins brtarget:$target), IIC_Br,
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"b\t$target", [(br bb:$target)]>,
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T1Encoding<{1,1,1,0,0,?}>;
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// Far jump
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let Defs = [LR] in
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def tBfar : TIx2<0b11110, 0b11, 1, (outs), (ins brtarget:$target), IIC_Br,
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"bl\t$target\t@ far jump",[]>;
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def tBR_JTr : T1JTI<(outs),
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(ins tGPR:$target, jtblock_operand:$jt, i32imm:$id),
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IIC_Br, "mov\tpc, $target\n\t.align\t2\n$jt",
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[(ARMbrjt tGPR:$target, tjumptable:$jt, imm:$id)]>,
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Encoding16 {
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let Inst{15-7} = 0b010001101;
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let Inst{2-0} = 0b111;
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}
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}
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}
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// FIXME: should be able to write a pattern for ARMBrcond, but can't use
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// a two-value operand where a dag node expects two operands. :(
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let isBranch = 1, isTerminator = 1 in
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def tBcc : T1I<(outs), (ins brtarget:$target, pred:$cc), IIC_Br,
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"b$cc\t$target",
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[/*(ARMbrcond bb:$target, imm:$cc)*/]>,
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T1Encoding<{1,1,0,1,?,?}>;
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// Compare and branch on zero / non-zero
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let isBranch = 1, isTerminator = 1 in {
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def tCBZ : T1I<(outs), (ins tGPR:$cmp, brtarget:$target), IIC_Br,
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"cbz\t$cmp, $target", []>,
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T1Misc<{0,0,?,1,?,?,?}>;
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def tCBNZ : T1I<(outs), (ins tGPR:$cmp, brtarget:$target), IIC_Br,
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"cbnz\t$cmp, $target", []>,
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T1Misc<{1,0,?,1,?,?,?}>;
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}
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//===----------------------------------------------------------------------===//
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// Load Store Instructions.
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//
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let canFoldAsLoad = 1, isReMaterializable = 1, mayHaveSideEffects = 1 in
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def tLDR : T1pI4<(outs tGPR:$dst), (ins t_addrmode_s4:$addr), IIC_iLoadr,
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"ldr", "\t$dst, $addr",
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[(set tGPR:$dst, (load t_addrmode_s4:$addr))]>,
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T1LdSt<0b100>;
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def tLDRi: T1pI4<(outs tGPR:$dst), (ins t_addrmode_s4:$addr), IIC_iLoadr,
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"ldr", "\t$dst, $addr",
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[]>,
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T1LdSt4Imm<{1,?,?}>;
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def tLDRB : T1pI1<(outs tGPR:$dst), (ins t_addrmode_s1:$addr), IIC_iLoadr,
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"ldrb", "\t$dst, $addr",
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[(set tGPR:$dst, (zextloadi8 t_addrmode_s1:$addr))]>,
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T1LdSt<0b110>;
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def tLDRBi: T1pI1<(outs tGPR:$dst), (ins t_addrmode_s1:$addr), IIC_iLoadr,
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"ldrb", "\t$dst, $addr",
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[]>,
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T1LdSt1Imm<{1,?,?}>;
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def tLDRH : T1pI2<(outs tGPR:$dst), (ins t_addrmode_s2:$addr), IIC_iLoadr,
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"ldrh", "\t$dst, $addr",
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[(set tGPR:$dst, (zextloadi16 t_addrmode_s2:$addr))]>,
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T1LdSt<0b101>;
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def tLDRHi: T1pI2<(outs tGPR:$dst), (ins t_addrmode_s2:$addr), IIC_iLoadr,
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"ldrh", "\t$dst, $addr",
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[]>,
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T1LdSt2Imm<{1,?,?}>;
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let AddedComplexity = 10 in
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def tLDRSB : T1pI1<(outs tGPR:$dst), (ins t_addrmode_rr:$addr), IIC_iLoadr,
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"ldrsb", "\t$dst, $addr",
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[(set tGPR:$dst, (sextloadi8 t_addrmode_rr:$addr))]>,
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T1LdSt<0b011>;
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let AddedComplexity = 10 in
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def tLDRSH : T1pI2<(outs tGPR:$dst), (ins t_addrmode_rr:$addr), IIC_iLoadr,
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"ldrsh", "\t$dst, $addr",
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[(set tGPR:$dst, (sextloadi16 t_addrmode_rr:$addr))]>,
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T1LdSt<0b111>;
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let canFoldAsLoad = 1 in
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def tLDRspi : T1pIs<(outs tGPR:$dst), (ins t_addrmode_sp:$addr), IIC_iLoadi,
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"ldr", "\t$dst, $addr",
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[(set tGPR:$dst, (load t_addrmode_sp:$addr))]>,
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T1LdStSP<{1,?,?}>;
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// Special instruction for restore. It cannot clobber condition register
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// when it's expanded by eliminateCallFramePseudoInstr().
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let canFoldAsLoad = 1, mayLoad = 1 in
|
|
def tRestore : T1pIs<(outs tGPR:$dst), (ins t_addrmode_sp:$addr), IIC_iLoadi,
|
|
"ldr", "\t$dst, $addr", []>,
|
|
T1LdStSP<{1,?,?}>;
|
|
|
|
// Load tconstpool
|
|
// FIXME: Use ldr.n to work around a Darwin assembler bug.
|
|
let canFoldAsLoad = 1, isReMaterializable = 1, mayHaveSideEffects = 1 in
|
|
def tLDRpci : T1pIs<(outs tGPR:$dst), (ins i32imm:$addr), IIC_iLoadi,
|
|
"ldr", ".n\t$dst, $addr",
|
|
[(set tGPR:$dst, (load (ARMWrapper tconstpool:$addr)))]>,
|
|
T1Encoding<{0,1,0,0,1,?}>; // A6.2 & A8.6.59
|
|
|
|
// Special LDR for loads from non-pc-relative constpools.
|
|
let canFoldAsLoad = 1, mayLoad = 1, isReMaterializable = 1,
|
|
mayHaveSideEffects = 1 in
|
|
def tLDRcp : T1pIs<(outs tGPR:$dst), (ins i32imm:$addr), IIC_iLoadi,
|
|
"ldr", "\t$dst, $addr", []>,
|
|
T1LdStSP<{1,?,?}>;
|
|
|
|
def tSTR : T1pI4<(outs), (ins tGPR:$src, t_addrmode_s4:$addr), IIC_iStorer,
|
|
"str", "\t$src, $addr",
|
|
[(store tGPR:$src, t_addrmode_s4:$addr)]>,
|
|
T1LdSt<0b000>;
|
|
def tSTRi: T1pI4<(outs), (ins tGPR:$src, t_addrmode_s4:$addr), IIC_iStorer,
|
|
"str", "\t$src, $addr",
|
|
[]>,
|
|
T1LdSt4Imm<{0,?,?}>;
|
|
|
|
def tSTRB : T1pI1<(outs), (ins tGPR:$src, t_addrmode_s1:$addr), IIC_iStorer,
|
|
"strb", "\t$src, $addr",
|
|
[(truncstorei8 tGPR:$src, t_addrmode_s1:$addr)]>,
|
|
T1LdSt<0b010>;
|
|
def tSTRBi: T1pI1<(outs), (ins tGPR:$src, t_addrmode_s1:$addr), IIC_iStorer,
|
|
"strb", "\t$src, $addr",
|
|
[]>,
|
|
T1LdSt1Imm<{0,?,?}>;
|
|
|
|
def tSTRH : T1pI2<(outs), (ins tGPR:$src, t_addrmode_s2:$addr), IIC_iStorer,
|
|
"strh", "\t$src, $addr",
|
|
[(truncstorei16 tGPR:$src, t_addrmode_s2:$addr)]>,
|
|
T1LdSt<0b001>;
|
|
def tSTRHi: T1pI2<(outs), (ins tGPR:$src, t_addrmode_s2:$addr), IIC_iStorer,
|
|
"strh", "\t$src, $addr",
|
|
[]>,
|
|
T1LdSt2Imm<{0,?,?}>;
|
|
|
|
def tSTRspi : T1pIs<(outs), (ins tGPR:$src, t_addrmode_sp:$addr), IIC_iStorei,
|
|
"str", "\t$src, $addr",
|
|
[(store tGPR:$src, t_addrmode_sp:$addr)]>,
|
|
T1LdStSP<{0,?,?}>;
|
|
|
|
let mayStore = 1 in {
|
|
// Special instruction for spill. It cannot clobber condition register
|
|
// when it's expanded by eliminateCallFramePseudoInstr().
|
|
def tSpill : T1pIs<(outs), (ins tGPR:$src, t_addrmode_sp:$addr), IIC_iStorei,
|
|
"str", "\t$src, $addr", []>,
|
|
T1LdStSP<{0,?,?}>;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Load / store multiple Instructions.
|
|
//
|
|
|
|
// These requires base address to be written back or one of the loaded regs.
|
|
let mayLoad = 1, hasExtraDefRegAllocReq = 1 in
|
|
def tLDM : T1I<(outs),
|
|
(ins addrmode4:$addr, pred:$p, reglist:$wb, variable_ops),
|
|
IIC_iLoadm,
|
|
"ldm${addr:submode}${p}\t$addr, $wb", []>,
|
|
T1Encoding<{1,1,0,0,1,?}>; // A6.2 & A8.6.53
|
|
|
|
let mayStore = 1, hasExtraSrcRegAllocReq = 1 in
|
|
def tSTM : T1I<(outs),
|
|
(ins addrmode4:$addr, pred:$p, reglist:$wb, variable_ops),
|
|
IIC_iStorem,
|
|
"stm${addr:submode}${p}\t$addr, $wb", []>,
|
|
T1Encoding<{1,1,0,0,0,?}>; // A6.2 & A8.6.189
|
|
|
|
let mayLoad = 1, Uses = [SP], Defs = [SP], hasExtraDefRegAllocReq = 1 in
|
|
def tPOP : T1I<(outs), (ins pred:$p, reglist:$wb, variable_ops), IIC_Br,
|
|
"pop${p}\t$wb", []>,
|
|
T1Misc<{1,1,0,?,?,?,?}>;
|
|
|
|
let mayStore = 1, Uses = [SP], Defs = [SP], hasExtraSrcRegAllocReq = 1 in
|
|
def tPUSH : T1I<(outs), (ins pred:$p, reglist:$wb, variable_ops), IIC_Br,
|
|
"push${p}\t$wb", []>,
|
|
T1Misc<{0,1,0,?,?,?,?}>;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Arithmetic Instructions.
|
|
//
|
|
|
|
// Add with carry register
|
|
let isCommutable = 1, Uses = [CPSR] in
|
|
def tADC : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"adc", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (adde tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0101>;
|
|
|
|
// Add immediate
|
|
def tADDi3 : T1sI<(outs tGPR:$dst), (ins tGPR:$lhs, i32imm:$rhs), IIC_iALUi,
|
|
"add", "\t$dst, $lhs, $rhs",
|
|
[(set tGPR:$dst, (add tGPR:$lhs, imm0_7:$rhs))]>,
|
|
T1General<0b01110>;
|
|
|
|
def tADDi8 : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, i32imm:$rhs), IIC_iALUi,
|
|
"add", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (add tGPR:$lhs, imm8_255:$rhs))]>,
|
|
T1General<{1,1,0,?,?}>;
|
|
|
|
// Add register
|
|
let isCommutable = 1 in
|
|
def tADDrr : T1sI<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"add", "\t$dst, $lhs, $rhs",
|
|
[(set tGPR:$dst, (add tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1General<0b01100>;
|
|
|
|
let neverHasSideEffects = 1 in
|
|
def tADDhirr : T1pIt<(outs GPR:$dst), (ins GPR:$lhs, GPR:$rhs), IIC_iALUr,
|
|
"add", "\t$dst, $rhs", []>,
|
|
T1Special<{0,0,?,?}>;
|
|
|
|
// And register
|
|
let isCommutable = 1 in
|
|
def tAND : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"and", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (and tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0000>;
|
|
|
|
// ASR immediate
|
|
def tASRri : T1sI<(outs tGPR:$dst), (ins tGPR:$lhs, i32imm:$rhs), IIC_iMOVsi,
|
|
"asr", "\t$dst, $lhs, $rhs",
|
|
[(set tGPR:$dst, (sra tGPR:$lhs, (i32 imm:$rhs)))]>,
|
|
T1General<{0,1,0,?,?}>;
|
|
|
|
// ASR register
|
|
def tASRrr : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iMOVsr,
|
|
"asr", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (sra tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0100>;
|
|
|
|
// BIC register
|
|
def tBIC : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"bic", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (and tGPR:$lhs, (not tGPR:$rhs)))]>,
|
|
T1DataProcessing<0b1110>;
|
|
|
|
// CMN register
|
|
let Defs = [CPSR] in {
|
|
//FIXME: Disable CMN, as CCodes are backwards from compare expectations
|
|
// Compare-to-zero still works out, just not the relationals
|
|
//def tCMN : T1pI<(outs), (ins tGPR:$lhs, tGPR:$rhs), IIC_iCMPr,
|
|
// "cmn", "\t$lhs, $rhs",
|
|
// [(ARMcmp tGPR:$lhs, (ineg tGPR:$rhs))]>,
|
|
// T1DataProcessing<0b1011>;
|
|
def tCMNz : T1pI<(outs), (ins tGPR:$lhs, tGPR:$rhs), IIC_iCMPr,
|
|
"cmn", "\t$lhs, $rhs",
|
|
[(ARMcmpZ tGPR:$lhs, (ineg tGPR:$rhs))]>,
|
|
T1DataProcessing<0b1011>;
|
|
}
|
|
|
|
// CMP immediate
|
|
let Defs = [CPSR] in {
|
|
def tCMPi8 : T1pI<(outs), (ins tGPR:$lhs, i32imm:$rhs), IIC_iCMPi,
|
|
"cmp", "\t$lhs, $rhs",
|
|
[(ARMcmp tGPR:$lhs, imm0_255:$rhs)]>,
|
|
T1General<{1,0,1,?,?}>;
|
|
def tCMPzi8 : T1pI<(outs), (ins tGPR:$lhs, i32imm:$rhs), IIC_iCMPi,
|
|
"cmp", "\t$lhs, $rhs",
|
|
[(ARMcmpZ tGPR:$lhs, imm0_255:$rhs)]>,
|
|
T1General<{1,0,1,?,?}>;
|
|
}
|
|
|
|
// CMP register
|
|
let Defs = [CPSR] in {
|
|
def tCMPr : T1pI<(outs), (ins tGPR:$lhs, tGPR:$rhs), IIC_iCMPr,
|
|
"cmp", "\t$lhs, $rhs",
|
|
[(ARMcmp tGPR:$lhs, tGPR:$rhs)]>,
|
|
T1DataProcessing<0b1010>;
|
|
def tCMPzr : T1pI<(outs), (ins tGPR:$lhs, tGPR:$rhs), IIC_iCMPr,
|
|
"cmp", "\t$lhs, $rhs",
|
|
[(ARMcmpZ tGPR:$lhs, tGPR:$rhs)]>,
|
|
T1DataProcessing<0b1010>;
|
|
|
|
def tCMPhir : T1pI<(outs), (ins GPR:$lhs, GPR:$rhs), IIC_iCMPr,
|
|
"cmp", "\t$lhs, $rhs", []>,
|
|
T1Special<{0,1,?,?}>;
|
|
def tCMPzhir : T1pI<(outs), (ins GPR:$lhs, GPR:$rhs), IIC_iCMPr,
|
|
"cmp", "\t$lhs, $rhs", []>,
|
|
T1Special<{0,1,?,?}>;
|
|
}
|
|
|
|
|
|
// XOR register
|
|
let isCommutable = 1 in
|
|
def tEOR : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"eor", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (xor tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0001>;
|
|
|
|
// LSL immediate
|
|
def tLSLri : T1sI<(outs tGPR:$dst), (ins tGPR:$lhs, i32imm:$rhs), IIC_iMOVsi,
|
|
"lsl", "\t$dst, $lhs, $rhs",
|
|
[(set tGPR:$dst, (shl tGPR:$lhs, (i32 imm:$rhs)))]>,
|
|
T1General<{0,0,0,?,?}>;
|
|
|
|
// LSL register
|
|
def tLSLrr : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iMOVsr,
|
|
"lsl", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (shl tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0010>;
|
|
|
|
// LSR immediate
|
|
def tLSRri : T1sI<(outs tGPR:$dst), (ins tGPR:$lhs, i32imm:$rhs), IIC_iMOVsi,
|
|
"lsr", "\t$dst, $lhs, $rhs",
|
|
[(set tGPR:$dst, (srl tGPR:$lhs, (i32 imm:$rhs)))]>,
|
|
T1General<{0,0,1,?,?}>;
|
|
|
|
// LSR register
|
|
def tLSRrr : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iMOVsr,
|
|
"lsr", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (srl tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0011>;
|
|
|
|
// move register
|
|
def tMOVi8 : T1sI<(outs tGPR:$dst), (ins i32imm:$src), IIC_iMOVi,
|
|
"mov", "\t$dst, $src",
|
|
[(set tGPR:$dst, imm0_255:$src)]>,
|
|
T1General<{1,0,0,?,?}>;
|
|
|
|
// TODO: A7-73: MOV(2) - mov setting flag.
|
|
|
|
|
|
let neverHasSideEffects = 1 in {
|
|
// FIXME: Make this predicable.
|
|
def tMOVr : T1I<(outs tGPR:$dst), (ins tGPR:$src), IIC_iMOVr,
|
|
"mov\t$dst, $src", []>,
|
|
T1Special<0b1000>;
|
|
let Defs = [CPSR] in
|
|
def tMOVSr : T1I<(outs tGPR:$dst), (ins tGPR:$src), IIC_iMOVr,
|
|
"movs\t$dst, $src", []>, Encoding16 {
|
|
let Inst{15-6} = 0b0000000000;
|
|
}
|
|
|
|
// FIXME: Make these predicable.
|
|
def tMOVgpr2tgpr : T1I<(outs tGPR:$dst), (ins GPR:$src), IIC_iMOVr,
|
|
"mov\t$dst, $src", []>,
|
|
T1Special<{1,0,0,?}>;
|
|
def tMOVtgpr2gpr : T1I<(outs GPR:$dst), (ins tGPR:$src), IIC_iMOVr,
|
|
"mov\t$dst, $src", []>,
|
|
T1Special<{1,0,?,0}>;
|
|
def tMOVgpr2gpr : T1I<(outs GPR:$dst), (ins GPR:$src), IIC_iMOVr,
|
|
"mov\t$dst, $src", []>,
|
|
T1Special<{1,0,?,?}>;
|
|
} // neverHasSideEffects
|
|
|
|
// multiply register
|
|
let isCommutable = 1 in
|
|
def tMUL : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iMUL32,
|
|
"mul", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (mul tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b1101>;
|
|
|
|
// move inverse register
|
|
def tMVN : T1sI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iMOVr,
|
|
"mvn", "\t$dst, $src",
|
|
[(set tGPR:$dst, (not tGPR:$src))]>,
|
|
T1DataProcessing<0b1111>;
|
|
|
|
// bitwise or register
|
|
let isCommutable = 1 in
|
|
def tORR : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"orr", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (or tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b1100>;
|
|
|
|
// swaps
|
|
def tREV : T1pI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iUNAr,
|
|
"rev", "\t$dst, $src",
|
|
[(set tGPR:$dst, (bswap tGPR:$src))]>,
|
|
Requires<[IsThumb1Only, HasV6]>,
|
|
T1Misc<{1,0,1,0,0,0,?}>;
|
|
|
|
def tREV16 : T1pI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iUNAr,
|
|
"rev16", "\t$dst, $src",
|
|
[(set tGPR:$dst,
|
|
(or (and (srl tGPR:$src, (i32 8)), 0xFF),
|
|
(or (and (shl tGPR:$src, (i32 8)), 0xFF00),
|
|
(or (and (srl tGPR:$src, (i32 8)), 0xFF0000),
|
|
(and (shl tGPR:$src, (i32 8)), 0xFF000000)))))]>,
|
|
Requires<[IsThumb1Only, HasV6]>,
|
|
T1Misc<{1,0,1,0,0,1,?}>;
|
|
|
|
def tREVSH : T1pI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iUNAr,
|
|
"revsh", "\t$dst, $src",
|
|
[(set tGPR:$dst,
|
|
(sext_inreg
|
|
(or (srl (and tGPR:$src, 0xFF00), (i32 8)),
|
|
(shl tGPR:$src, (i32 8))), i16))]>,
|
|
Requires<[IsThumb1Only, HasV6]>,
|
|
T1Misc<{1,0,1,0,1,1,?}>;
|
|
|
|
// rotate right register
|
|
def tROR : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iMOVsr,
|
|
"ror", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (rotr tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0111>;
|
|
|
|
// negate register
|
|
def tRSB : T1sI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iALUi,
|
|
"rsb", "\t$dst, $src, #0",
|
|
[(set tGPR:$dst, (ineg tGPR:$src))]>,
|
|
T1DataProcessing<0b1001>;
|
|
|
|
// Subtract with carry register
|
|
let Uses = [CPSR] in
|
|
def tSBC : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"sbc", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (sube tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1DataProcessing<0b0110>;
|
|
|
|
// Subtract immediate
|
|
def tSUBi3 : T1sI<(outs tGPR:$dst), (ins tGPR:$lhs, i32imm:$rhs), IIC_iALUi,
|
|
"sub", "\t$dst, $lhs, $rhs",
|
|
[(set tGPR:$dst, (add tGPR:$lhs, imm0_7_neg:$rhs))]>,
|
|
T1General<0b01111>;
|
|
|
|
def tSUBi8 : T1sIt<(outs tGPR:$dst), (ins tGPR:$lhs, i32imm:$rhs), IIC_iALUi,
|
|
"sub", "\t$dst, $rhs",
|
|
[(set tGPR:$dst, (add tGPR:$lhs, imm8_255_neg:$rhs))]>,
|
|
T1General<{1,1,1,?,?}>;
|
|
|
|
// subtract register
|
|
def tSUBrr : T1sI<(outs tGPR:$dst), (ins tGPR:$lhs, tGPR:$rhs), IIC_iALUr,
|
|
"sub", "\t$dst, $lhs, $rhs",
|
|
[(set tGPR:$dst, (sub tGPR:$lhs, tGPR:$rhs))]>,
|
|
T1General<0b01101>;
|
|
|
|
// TODO: A7-96: STMIA - store multiple.
|
|
|
|
// sign-extend byte
|
|
def tSXTB : T1pI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iUNAr,
|
|
"sxtb", "\t$dst, $src",
|
|
[(set tGPR:$dst, (sext_inreg tGPR:$src, i8))]>,
|
|
Requires<[IsThumb1Only, HasV6]>,
|
|
T1Misc<{0,0,1,0,0,1,?}>;
|
|
|
|
// sign-extend short
|
|
def tSXTH : T1pI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iUNAr,
|
|
"sxth", "\t$dst, $src",
|
|
[(set tGPR:$dst, (sext_inreg tGPR:$src, i16))]>,
|
|
Requires<[IsThumb1Only, HasV6]>,
|
|
T1Misc<{0,0,1,0,0,0,?}>;
|
|
|
|
// test
|
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let isCommutable = 1, Defs = [CPSR] in
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def tTST : T1pI<(outs), (ins tGPR:$lhs, tGPR:$rhs), IIC_iCMPr,
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"tst", "\t$lhs, $rhs",
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[(ARMcmpZ (and tGPR:$lhs, tGPR:$rhs), 0)]>,
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T1DataProcessing<0b1000>;
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// zero-extend byte
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def tUXTB : T1pI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iUNAr,
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"uxtb", "\t$dst, $src",
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[(set tGPR:$dst, (and tGPR:$src, 0xFF))]>,
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Requires<[IsThumb1Only, HasV6]>,
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T1Misc<{0,0,1,0,1,1,?}>;
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// zero-extend short
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def tUXTH : T1pI<(outs tGPR:$dst), (ins tGPR:$src), IIC_iUNAr,
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"uxth", "\t$dst, $src",
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[(set tGPR:$dst, (and tGPR:$src, 0xFFFF))]>,
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Requires<[IsThumb1Only, HasV6]>,
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T1Misc<{0,0,1,0,1,0,?}>;
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// Conditional move tMOVCCr - Used to implement the Thumb SELECT_CC DAG operation.
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// Expanded after instruction selection into a branch sequence.
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let usesCustomInserter = 1 in // Expanded after instruction selection.
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def tMOVCCr_pseudo :
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PseudoInst<(outs tGPR:$dst), (ins tGPR:$false, tGPR:$true, pred:$cc),
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NoItinerary, "@ tMOVCCr $cc",
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[/*(set tGPR:$dst, (ARMcmov tGPR:$false, tGPR:$true, imm:$cc))*/]>;
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// 16-bit movcc in IT blocks for Thumb2.
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def tMOVCCr : T1pIt<(outs GPR:$dst), (ins GPR:$lhs, GPR:$rhs), IIC_iCMOVr,
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"mov", "\t$dst, $rhs", []>,
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T1Special<{1,0,?,?}>;
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def tMOVCCi : T1pIt<(outs GPR:$dst), (ins GPR:$lhs, i32imm:$rhs), IIC_iCMOVi,
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"mov", "\t$dst, $rhs", []>,
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T1General<{1,0,0,?,?}>;
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// tLEApcrel - Load a pc-relative address into a register without offending the
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// assembler.
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def tLEApcrel : T1I<(outs tGPR:$dst), (ins i32imm:$label, pred:$p), IIC_iALUi,
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"adr$p\t$dst, #$label", []>,
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T1Encoding<{1,0,1,0,0,?}>; // A6.2 & A8.6.10
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def tLEApcrelJT : T1I<(outs tGPR:$dst),
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(ins i32imm:$label, nohash_imm:$id, pred:$p),
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IIC_iALUi, "adr$p\t$dst, #${label}_${id}", []>,
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T1Encoding<{1,0,1,0,0,?}>; // A6.2 & A8.6.10
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//===----------------------------------------------------------------------===//
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// TLS Instructions
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//
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// __aeabi_read_tp preserves the registers r1-r3.
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let isCall = 1,
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Defs = [R0, LR] in {
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def tTPsoft : TIx2<0b11110, 0b11, 1, (outs), (ins), IIC_Br,
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"bl\t__aeabi_read_tp",
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[(set R0, ARMthread_pointer)]>;
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}
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// SJLJ Exception handling intrinsics
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// eh_sjlj_setjmp() is an instruction sequence to store the return
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// address and save #0 in R0 for the non-longjmp case.
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// Since by its nature we may be coming from some other function to get
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// here, and we're using the stack frame for the containing function to
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// save/restore registers, we can't keep anything live in regs across
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// the eh_sjlj_setjmp(), else it will almost certainly have been tromped upon
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// when we get here from a longjmp(). We force everthing out of registers
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// except for our own input by listing the relevant registers in Defs. By
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// doing so, we also cause the prologue/epilogue code to actively preserve
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// all of the callee-saved resgisters, which is exactly what we want.
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let Defs =
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[ R0, R1, R2, R3, R4, R5, R6, R7, R12 ] in {
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def tInt_eh_sjlj_setjmp : ThumbXI<(outs), (ins GPR:$src),
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AddrModeNone, SizeSpecial, NoItinerary,
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"mov\tr12, r1\t@ begin eh.setjmp\n"
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"\tmov\tr1, sp\n"
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"\tstr\tr1, [$src, #8]\n"
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"\tadr\tr1, 0f\n"
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"\tadds\tr1, #1\n"
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"\tstr\tr1, [$src, #4]\n"
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"\tmov\tr1, r12\n"
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"\tmovs\tr0, #0\n"
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"\tb\t1f\n"
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".align 2\n"
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"0:\tmovs\tr0, #1\t@ end eh.setjmp\n"
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"1:", "",
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[(set R0, (ARMeh_sjlj_setjmp GPR:$src))]>;
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}
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//===----------------------------------------------------------------------===//
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// Non-Instruction Patterns
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//
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// Add with carry
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def : T1Pat<(addc tGPR:$lhs, imm0_7:$rhs),
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(tADDi3 tGPR:$lhs, imm0_7:$rhs)>;
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def : T1Pat<(addc tGPR:$lhs, imm8_255:$rhs),
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(tADDi8 tGPR:$lhs, imm8_255:$rhs)>;
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def : T1Pat<(addc tGPR:$lhs, tGPR:$rhs),
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(tADDrr tGPR:$lhs, tGPR:$rhs)>;
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// Subtract with carry
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def : T1Pat<(addc tGPR:$lhs, imm0_7_neg:$rhs),
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(tSUBi3 tGPR:$lhs, imm0_7_neg:$rhs)>;
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def : T1Pat<(addc tGPR:$lhs, imm8_255_neg:$rhs),
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(tSUBi8 tGPR:$lhs, imm8_255_neg:$rhs)>;
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def : T1Pat<(subc tGPR:$lhs, tGPR:$rhs),
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(tSUBrr tGPR:$lhs, tGPR:$rhs)>;
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// ConstantPool, GlobalAddress
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def : T1Pat<(ARMWrapper tglobaladdr :$dst), (tLEApcrel tglobaladdr :$dst)>;
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def : T1Pat<(ARMWrapper tconstpool :$dst), (tLEApcrel tconstpool :$dst)>;
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// JumpTable
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def : T1Pat<(ARMWrapperJT tjumptable:$dst, imm:$id),
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(tLEApcrelJT tjumptable:$dst, imm:$id)>;
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// Direct calls
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def : T1Pat<(ARMtcall texternalsym:$func), (tBL texternalsym:$func)>,
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Requires<[IsThumb, IsNotDarwin]>;
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def : T1Pat<(ARMtcall texternalsym:$func), (tBLr9 texternalsym:$func)>,
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Requires<[IsThumb, IsDarwin]>;
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def : Tv5Pat<(ARMcall texternalsym:$func), (tBLXi texternalsym:$func)>,
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Requires<[IsThumb, HasV5T, IsNotDarwin]>;
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def : Tv5Pat<(ARMcall texternalsym:$func), (tBLXi_r9 texternalsym:$func)>,
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Requires<[IsThumb, HasV5T, IsDarwin]>;
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// Indirect calls to ARM routines
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def : Tv5Pat<(ARMcall GPR:$dst), (tBLXr GPR:$dst)>,
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Requires<[IsThumb, HasV5T, IsNotDarwin]>;
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def : Tv5Pat<(ARMcall GPR:$dst), (tBLXr_r9 GPR:$dst)>,
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Requires<[IsThumb, HasV5T, IsDarwin]>;
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// zextload i1 -> zextload i8
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def : T1Pat<(zextloadi1 t_addrmode_s1:$addr),
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(tLDRB t_addrmode_s1:$addr)>;
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// extload -> zextload
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def : T1Pat<(extloadi1 t_addrmode_s1:$addr), (tLDRB t_addrmode_s1:$addr)>;
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def : T1Pat<(extloadi8 t_addrmode_s1:$addr), (tLDRB t_addrmode_s1:$addr)>;
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def : T1Pat<(extloadi16 t_addrmode_s2:$addr), (tLDRH t_addrmode_s2:$addr)>;
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// If it's impossible to use [r,r] address mode for sextload, select to
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// ldr{b|h} + sxt{b|h} instead.
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def : T1Pat<(sextloadi8 t_addrmode_s1:$addr),
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(tSXTB (tLDRB t_addrmode_s1:$addr))>,
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Requires<[IsThumb1Only, HasV6]>;
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def : T1Pat<(sextloadi16 t_addrmode_s2:$addr),
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(tSXTH (tLDRH t_addrmode_s2:$addr))>,
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Requires<[IsThumb1Only, HasV6]>;
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def : T1Pat<(sextloadi8 t_addrmode_s1:$addr),
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(tASRri (tLSLri (tLDRB t_addrmode_s1:$addr), 24), 24)>;
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def : T1Pat<(sextloadi16 t_addrmode_s1:$addr),
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(tASRri (tLSLri (tLDRH t_addrmode_s1:$addr), 16), 16)>;
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// Large immediate handling.
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// Two piece imms.
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def : T1Pat<(i32 thumb_immshifted:$src),
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(tLSLri (tMOVi8 (thumb_immshifted_val imm:$src)),
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(thumb_immshifted_shamt imm:$src))>;
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def : T1Pat<(i32 imm0_255_comp:$src),
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(tMVN (tMOVi8 (imm_comp_XFORM imm:$src)))>;
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// Pseudo instruction that combines ldr from constpool and add pc. This should
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// be expanded into two instructions late to allow if-conversion and
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// scheduling.
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let isReMaterializable = 1 in
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def tLDRpci_pic : PseudoInst<(outs GPR:$dst), (ins i32imm:$addr, pclabel:$cp),
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NoItinerary, "@ ldr.n\t$dst, $addr\n$cp:\n\tadd\t$dst, pc",
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[(set GPR:$dst, (ARMpic_add (load (ARMWrapper tconstpool:$addr)),
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imm:$cp))]>,
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Requires<[IsThumb1Only]>;
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