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Add support for alignment operands on VLD1-lane instructions. 

This is another part of the fix for Radar 8599955.

llvm-svn: 117976
This commit is contained in:
Bob Wilson 2010-11-01 23:40:51 +00:00
parent 7e57573844
commit dd9fbaa9c0
3 changed files with 59 additions and 35 deletions
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69
llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
View File

@ -116,7 +116,7 @@ public:
bool SelectAddrMode4(SDValue N, SDValue &Addr, SDValue &Mode);
bool SelectAddrMode5(SDValue N, SDValue &Base,
SDValue &Offset);
bool SelectAddrMode6(SDValue N, SDValue &Addr, SDValue &Align);
bool SelectAddrMode6(SDNode *Parent, SDValue N, SDValue &Addr,SDValue &Align);
bool SelectAddrModePC(SDValue N, SDValue &Offset,
SDValue &Label);
@ -222,6 +222,9 @@ private:
SDNode *QuadSRegs(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
SDNode *QuadDRegs(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
SDNode *QuadQRegs(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
// Get the alignment operand for a NEON VLD or VST instruction.
SDValue GetVLDSTAlign(SDValue Align, unsigned NumVecs, bool is64BitVector);
};
}
@ -769,10 +772,26 @@ bool ARMDAGToDAGISel::SelectAddrMode5(SDValue N,
return true;
}
bool ARMDAGToDAGISel::SelectAddrMode6(SDValue N, SDValue &Addr, SDValue &Align){
bool ARMDAGToDAGISel::SelectAddrMode6(SDNode *Parent, SDValue N, SDValue &Addr,
SDValue &Align) {
Addr = N;
// Default to no alignment.
Align = CurDAG->getTargetConstant(0, MVT::i32);
unsigned Alignment = 0;
if (LSBaseSDNode *LSN = dyn_cast<LSBaseSDNode>(Parent)) {
// This case occurs only for VLD1-lane/dup and VST1-lane instructions.
// The maximum alignment is equal to the memory size being referenced.
unsigned LSNAlign = LSN->getAlignment();
unsigned MemSize = LSN->getMemoryVT().getSizeInBits() / 8;
if (LSNAlign > MemSize && MemSize > 1)
Alignment = MemSize;
} else {
// All other uses of addrmode6 are for intrinsics. For now just record
// the raw alignment value; it will be refined later based on the legal
// alignment operands for the intrinsic.
Alignment = cast<MemIntrinsicSDNode>(Parent)->getAlignment();
}
Align = CurDAG->getTargetConstant(Alignment, MVT::i32);
return true;
}
@ -1261,19 +1280,23 @@ SDNode *ARMDAGToDAGISel::QuadQRegs(EVT VT, SDValue V0, SDValue V1,
/// GetVLDSTAlign - Get the alignment (in bytes) for the alignment operand
/// of a NEON VLD or VST instruction. The supported values depend on the
/// number of registers being loaded.
static unsigned GetVLDSTAlign(SDNode *N, unsigned NumVecs, bool is64BitVector) {
SDValue ARMDAGToDAGISel::GetVLDSTAlign(SDValue Align, unsigned NumVecs,
bool is64BitVector) {
unsigned NumRegs = NumVecs;
if (!is64BitVector && NumVecs < 3)
NumRegs *= 2;
unsigned Alignment = cast<MemIntrinsicSDNode>(N)->getAlignment();
unsigned Alignment = cast<ConstantSDNode>(Align)->getZExtValue();
if (Alignment >= 32 && NumRegs == 4)
return 32;
if (Alignment >= 16 && (NumRegs == 2 || NumRegs == 4))
return 16;
if (Alignment >= 8)
return 8;
return 0;
Alignment = 32;
else if (Alignment >= 16 && (NumRegs == 2 || NumRegs == 4))
Alignment = 16;
else if (Alignment >= 8)
Alignment = 8;
else
Alignment = 0;
return CurDAG->getTargetConstant(Alignment, MVT::i32);
}
SDNode *ARMDAGToDAGISel::SelectVLD(SDNode *N, unsigned NumVecs,
@ -1283,15 +1306,13 @@ SDNode *ARMDAGToDAGISel::SelectVLD(SDNode *N, unsigned NumVecs,
DebugLoc dl = N->getDebugLoc();
SDValue MemAddr, Align;
if (!SelectAddrMode6(N->getOperand(2), MemAddr, Align))
if (!SelectAddrMode6(N, N->getOperand(2), MemAddr, Align))
return NULL;
SDValue Chain = N->getOperand(0);
EVT VT = N->getValueType(0);
bool is64BitVector = VT.is64BitVector();
unsigned Alignment = GetVLDSTAlign(N, NumVecs, is64BitVector);
Align = CurDAG->getTargetConstant(Alignment, MVT::i32);
Align = GetVLDSTAlign(Align, NumVecs, is64BitVector);
unsigned OpcodeIndex;
switch (VT.getSimpleVT().SimpleTy) {
@ -1397,15 +1418,13 @@ SDNode *ARMDAGToDAGISel::SelectVST(SDNode *N, unsigned NumVecs,
DebugLoc dl = N->getDebugLoc();
SDValue MemAddr, Align;
if (!SelectAddrMode6(N->getOperand(2), MemAddr, Align))
if (!SelectAddrMode6(N, N->getOperand(2), MemAddr, Align))
return NULL;
SDValue Chain = N->getOperand(0);
EVT VT = N->getOperand(3).getValueType();
bool is64BitVector = VT.is64BitVector();
unsigned Alignment = GetVLDSTAlign(N, NumVecs, is64BitVector);
Align = CurDAG->getTargetConstant(Alignment, MVT::i32);
Align = GetVLDSTAlign(Align, NumVecs, is64BitVector);
unsigned OpcodeIndex;
switch (VT.getSimpleVT().SimpleTy) {
@ -1520,7 +1539,7 @@ SDNode *ARMDAGToDAGISel::SelectVLDSTLane(SDNode *N, bool IsLoad,
DebugLoc dl = N->getDebugLoc();
SDValue MemAddr, Align;
if (!SelectAddrMode6(N->getOperand(2), MemAddr, Align))
if (!SelectAddrMode6(N, N->getOperand(2), MemAddr, Align))
return NULL;
SDValue Chain = N->getOperand(0);
@ -1529,16 +1548,18 @@ SDNode *ARMDAGToDAGISel::SelectVLDSTLane(SDNode *N, bool IsLoad,
EVT VT = IsLoad ? N->getValueType(0) : N->getOperand(3).getValueType();
bool is64BitVector = VT.is64BitVector();
unsigned Alignment = 0;
if (NumVecs != 3) {
unsigned Alignment = cast<MemIntrinsicSDNode>(N)->getAlignment();
Alignment = cast<ConstantSDNode>(Align)->getZExtValue();
unsigned NumBytes = NumVecs * VT.getVectorElementType().getSizeInBits()/8;
if (Alignment > NumBytes)
Alignment = NumBytes;
// Alignment must be a power of two; make sure of that.
Alignment = (Alignment & -Alignment);
if (Alignment > 1)
Align = CurDAG->getTargetConstant(Alignment, MVT::i32);
if (Alignment == 1)
Alignment = 0;
}
Align = CurDAG->getTargetConstant(Alignment, MVT::i32);
unsigned OpcodeIndex;
switch (VT.getSimpleVT().SimpleTy) {

2
llvm/lib/Target/ARM/ARMInstrInfo.td
View File

@ -469,7 +469,7 @@ def addrmode5 : Operand<i32>,
// addrmode6 := reg with optional writeback
//
def addrmode6 : Operand<i32>,
ComplexPattern<i32, 2, "SelectAddrMode6", []> {
ComplexPattern<i32, 2, "SelectAddrMode6", [], [SDNPWantParent]>{
let PrintMethod = "printAddrMode6Operand";
let MIOperandInfo = (ops GPR:$addr, i32imm);
}

23
llvm/test/CodeGen/ARM/vldlane.ll
View File

@ -2,27 +2,30 @@
define <8 x i8> @vld1lanei8(i8* %A, <8 x i8>* %B) nounwind {
;CHECK: vld1lanei8:
;Check the (default) alignment value.
;CHECK: vld1.8 {d16[3]}, [r0]
%tmp1 = load <8 x i8>* %B
%tmp2 = load i8* %A, align 1
%tmp2 = load i8* %A, align 8
%tmp3 = insertelement <8 x i8> %tmp1, i8 %tmp2, i32 3
ret <8 x i8> %tmp3
}
define <4 x i16> @vld1lanei16(i16* %A, <4 x i16>* %B) nounwind {
;CHECK: vld1lanei16:
;CHECK: vld1.16 {d16[2]}, [r0]
;Check the alignment value. Max for this instruction is 16 bits:
;CHECK: vld1.16 {d16[2]}, [r0, :16]
%tmp1 = load <4 x i16>* %B
%tmp2 = load i16* %A, align 2
%tmp2 = load i16* %A, align 8
%tmp3 = insertelement <4 x i16> %tmp1, i16 %tmp2, i32 2
ret <4 x i16> %tmp3
}
define <2 x i32> @vld1lanei32(i32* %A, <2 x i32>* %B) nounwind {
;CHECK: vld1lanei32:
;CHECK: vld1.32 {d16[1]}, [r0]
;Check the alignment value. Max for this instruction is 16 bits:
;CHECK: vld1.32 {d16[1]}, [r0, :32]
%tmp1 = load <2 x i32>* %B
%tmp2 = load i32* %A, align 4
%tmp2 = load i32* %A, align 8
%tmp3 = insertelement <2 x i32> %tmp1, i32 %tmp2, i32 1
ret <2 x i32> %tmp3
}
@ -31,25 +34,25 @@ define <16 x i8> @vld1laneQi8(i8* %A, <16 x i8>* %B) nounwind {
;CHECK: vld1laneQi8:
;CHECK: vld1.8 {d17[1]}, [r0]
%tmp1 = load <16 x i8>* %B
%tmp2 = load i8* %A, align 1
%tmp2 = load i8* %A, align 8
%tmp3 = insertelement <16 x i8> %tmp1, i8 %tmp2, i32 9
ret <16 x i8> %tmp3
}
define <8 x i16> @vld1laneQi16(i16* %A, <8 x i16>* %B) nounwind {
;CHECK: vld1laneQi16:
;CHECK: vld1.16 {d17[1]}, [r0]
;CHECK: vld1.16 {d17[1]}, [r0, :16]
%tmp1 = load <8 x i16>* %B
%tmp2 = load i16* %A, align 2
%tmp2 = load i16* %A, align 8
%tmp3 = insertelement <8 x i16> %tmp1, i16 %tmp2, i32 5
ret <8 x i16> %tmp3
}
define <4 x i32> @vld1laneQi32(i32* %A, <4 x i32>* %B) nounwind {
;CHECK: vld1laneQi32:
;CHECK: vld1.32 {d17[1]}, [r0]
;CHECK: vld1.32 {d17[1]}, [r0, :32]
%tmp1 = load <4 x i32>* %B
%tmp2 = load i32* %A, align 4
%tmp2 = load i32* %A, align 8
%tmp3 = insertelement <4 x i32> %tmp1, i32 %tmp2, i32 3
ret <4 x i32> %tmp3
}