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Add patterns to use post-increment addressing for Neon VST1-lane instructions.

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llvm-svn: 126477
This commit is contained in:
Bob Wilson 2011-02-25 06:42:42 +00:00
parent 61c746f927
commit 6bbffe19e9
4 changed files with 65 additions and 11 deletions
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15
lib/Target/ARM/ARMISelDAGToDAG.cpp
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@ -126,6 +126,7 @@ public:
bool SelectAddrMode5(SDValue N, SDValue &Base,
SDValue &Offset);
bool SelectAddrMode6(SDNode *Parent, SDValue N, SDValue &Addr,SDValue &Align);
bool SelectAddrMode6Offset(SDNode *Op, SDValue N, SDValue &Offset);
bool SelectAddrModePC(SDValue N, SDValue &Offset, SDValue &Label);
@ -886,6 +887,20 @@ bool ARMDAGToDAGISel::SelectAddrMode6(SDNode *Parent, SDValue N, SDValue &Addr,
return true;
}
bool ARMDAGToDAGISel::SelectAddrMode6Offset(SDNode *Op, SDValue N,
SDValue &Offset) {
LSBaseSDNode *LdSt = cast<LSBaseSDNode>(Op);
ISD::MemIndexedMode AM = LdSt->getAddressingMode();
if (AM != ISD::POST_INC)
return false;
Offset = N;
if (ConstantSDNode *NC = dyn_cast<ConstantSDNode>(N)) {
if (NC->getZExtValue() * 8 == LdSt->getMemoryVT().getSizeInBits())
Offset = CurDAG->getRegister(0, MVT::i32);
}
return true;
}
bool ARMDAGToDAGISel::SelectAddrModePC(SDValue N,
SDValue &Offset, SDValue &Label) {
if (N.getOpcode() == ARMISD::PIC_ADD && N.hasOneUse()) {

4
lib/Target/ARM/ARMInstrInfo.td
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@ -561,7 +561,9 @@ def addrmode6 : Operand<i32>,
let EncoderMethod = "getAddrMode6AddressOpValue";
}
def am6offset : Operand<i32> {
def am6offset : Operand<i32>,
ComplexPattern<i32, 1, "SelectAddrMode6Offset",
[], [SDNPWantRoot]> {
let PrintMethod = "printAddrMode6OffsetOperand";
let MIOperandInfo = (ops GPR);
let EncoderMethod = "getAddrMode6OffsetOpValue";

31
lib/Target/ARM/ARMInstrNEON.td
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@ -1402,31 +1402,42 @@ def : Pat<(store (extractelt (v2f32 DPR:$src), imm:$lane), addrmode6:$addr),
def : Pat<(store (extractelt (v4f32 QPR:$src), imm:$lane), addrmode6:$addr),
(VST1LNq32Pseudo addrmode6:$addr, QPR:$src, imm:$lane)>;
let mayStore = 1, neverHasSideEffects = 1, hasExtraSrcRegAllocReq = 1 in {
// ...with address register writeback:
class VST1LNWB<bits<4> op11_8, bits<4> op7_4, string Dt>
class VST1LNWB<bits<4> op11_8, bits<4> op7_4, string Dt, ValueType Ty,
PatFrag StoreOp, SDNode ExtractOp>
: NLdStLn<1, 0b00, op11_8, op7_4, (outs GPR:$wb),
(ins addrmode6:$Rn, am6offset:$Rm,
DPR:$Vd, nohash_imm:$lane), IIC_VST1lnu, "vst1", Dt,
"\\{$Vd[$lane]\\}, $Rn$Rm",
"$Rn.addr = $wb", []>;
"$Rn.addr = $wb",
[(set GPR:$wb, (StoreOp (ExtractOp (Ty DPR:$Vd), imm:$lane),
addrmode6:$Rn, am6offset:$Rm))]>;
class VST1QLNWBPseudo<ValueType Ty, PatFrag StoreOp, SDNode ExtractOp>
: VSTQLNWBPseudo<IIC_VST1lnu> {
let Pattern = [(set GPR:$wb, (StoreOp (ExtractOp (Ty QPR:$src), imm:$lane),
addrmode6:$addr, am6offset:$offset))];
}
def VST1LNd8_UPD : VST1LNWB<0b0000, {?,?,?,0}, "8"> {
def VST1LNd8_UPD : VST1LNWB<0b0000, {?,?,?,0}, "8", v8i8, post_truncsti8,
NEONvgetlaneu> {
let Inst{7-5} = lane{2-0};
}
def VST1LNd16_UPD : VST1LNWB<0b0100, {?,?,0,?}, "16"> {
def VST1LNd16_UPD : VST1LNWB<0b0100, {?,?,0,?}, "16", v4i16, post_truncsti16,
NEONvgetlaneu> {
let Inst{7-6} = lane{1-0};
let Inst{4} = Rn{5};
}
def VST1LNd32_UPD : VST1LNWB<0b1000, {?,0,?,?}, "32"> {
def VST1LNd32_UPD : VST1LNWB<0b1000, {?,0,?,?}, "32", v2i32, post_store,
extractelt> {
let Inst{7} = lane{0};
let Inst{5-4} = Rn{5-4};
}
def VST1LNq8Pseudo_UPD : VSTQLNWBPseudo<IIC_VST1lnu>;
def VST1LNq16Pseudo_UPD : VSTQLNWBPseudo<IIC_VST1lnu>;
def VST1LNq32Pseudo_UPD : VSTQLNWBPseudo<IIC_VST1lnu>;
def VST1LNq8Pseudo_UPD : VST1QLNWBPseudo<v16i8, post_truncsti8, NEONvgetlaneu>;
def VST1LNq16Pseudo_UPD : VST1QLNWBPseudo<v8i16, post_truncsti16,NEONvgetlaneu>;
def VST1LNq32Pseudo_UPD : VST1QLNWBPseudo<v4i32, post_store, extractelt>;
let mayStore = 1, neverHasSideEffects = 1, hasExtraSrcRegAllocReq = 1 in {
// VST2LN : Vector Store (single 2-element structure from one lane)
class VST2LN<bits<4> op11_8, bits<4> op7_4, string Dt>

26
test/CodeGen/ARM/vstlane.ll
View File

@ -10,6 +10,19 @@ define void @vst1lanei8(i8* %A, <8 x i8>* %B) nounwind {
ret void
}
;Check for a post-increment updating store.
define void @vst1lanei8_update(i8** %ptr, <8 x i8>* %B) nounwind {
;CHECK: vst1lanei8_update:
;CHECK: vst1.8 {d16[3]}, [r2]!
%A = load i8** %ptr
%tmp1 = load <8 x i8>* %B
%tmp2 = extractelement <8 x i8> %tmp1, i32 3
store i8 %tmp2, i8* %A, align 8
%tmp3 = getelementptr i8* %A, i32 1
store i8* %tmp3, i8** %ptr
ret void
}
define void @vst1lanei16(i16* %A, <4 x i16>* %B) nounwind {
;CHECK: vst1lanei16:
;Check the alignment value. Max for this instruction is 16 bits:
@ -66,6 +79,19 @@ define void @vst1laneQi32(i32* %A, <4 x i32>* %B) nounwind {
ret void
}
;Check for a post-increment updating store.
define void @vst1laneQi32_update(i32** %ptr, <4 x i32>* %B) nounwind {
;CHECK: vst1laneQi32_update:
;CHECK: vst1.32 {d17[1]}, [r1, :32]!
%A = load i32** %ptr
%tmp1 = load <4 x i32>* %B
%tmp2 = extractelement <4 x i32> %tmp1, i32 3
store i32 %tmp2, i32* %A, align 8
%tmp3 = getelementptr i32* %A, i32 1
store i32* %tmp3, i32** %ptr
ret void
}
define void @vst1laneQf(float* %A, <4 x float>* %B) nounwind {
;CHECK: vst1laneQf:
;CHECK: vst1.32 {d17[1]}, [r0]