cmd/compile: move ppc64 over to new bounds check strategy

Change-Id: I25a9bbc247b2490e7e37ed843386f53a71822146
Reviewed-on: https://go-review.googlesource.com/c/go/+/682498
Reviewed-by: Paul Murphy <paumurph@redhat.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@google.com>

src/cmd/compile/internal/ppc64/ssa.go

@@ -14,6 +14,7 @@ import (
 	"cmd/compile/internal/types"
 	"cmd/internal/obj"
 	"cmd/internal/obj/ppc64"
+	"internal/abi"
 	"internal/buildcfg"
 	"math"
 	"strings"
@@ -1913,12 +1914,90 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
 		// AuxInt encodes how many buffer entries we need.
 		p.To.Sym = ir.Syms.GCWriteBarrier[v.AuxInt-1]
 
-	case ssa.OpPPC64LoweredPanicBoundsA, ssa.OpPPC64LoweredPanicBoundsB, ssa.OpPPC64LoweredPanicBoundsC:
+	case ssa.OpPPC64LoweredPanicBoundsRR, ssa.OpPPC64LoweredPanicBoundsRC, ssa.OpPPC64LoweredPanicBoundsCR, ssa.OpPPC64LoweredPanicBoundsCC:
-		p := s.Prog(obj.ACALL)
+		// Compute the constant we put in the PCData entry for this call.
+		code, signed := ssa.BoundsKind(v.AuxInt).Code()
+		xIsReg := false
+		yIsReg := false
+		xVal := 0
+		yVal := 0
+		switch v.Op {
+		case ssa.OpPPC64LoweredPanicBoundsRR:
+			xIsReg = true
+			xVal = int(v.Args[0].Reg() - ppc64.REG_R3)
+			yIsReg = true
+			yVal = int(v.Args[1].Reg() - ppc64.REG_R3)
+		case ssa.OpPPC64LoweredPanicBoundsRC:
+			xIsReg = true
+			xVal = int(v.Args[0].Reg() - ppc64.REG_R3)
+			c := v.Aux.(ssa.PanicBoundsC).C
+			if c >= 0 && c <= abi.BoundsMaxConst {
+				yVal = int(c)
+			} else {
+				// Move constant to a register
+				yIsReg = true
+				if yVal == xVal {
+					yVal = 1
+				}
+				p := s.Prog(ppc64.AMOVD)
+				p.From.Type = obj.TYPE_CONST
+				p.From.Offset = c
+				p.To.Type = obj.TYPE_REG
+				p.To.Reg = ppc64.REG_R3 + int16(yVal)
+			}
+		case ssa.OpPPC64LoweredPanicBoundsCR:
+			yIsReg = true
+			yVal := int(v.Args[0].Reg() - ppc64.REG_R3)
+			c := v.Aux.(ssa.PanicBoundsC).C
+			if c >= 0 && c <= abi.BoundsMaxConst {
+				xVal = int(c)
+			} else {
+				// Move constant to a register
+				if xVal == yVal {
+					xVal = 1
+				}
+				p := s.Prog(ppc64.AMOVD)
+				p.From.Type = obj.TYPE_CONST
+				p.From.Offset = c
+				p.To.Type = obj.TYPE_REG
+				p.To.Reg = ppc64.REG_R3 + int16(xVal)
+			}
+		case ssa.OpPPC64LoweredPanicBoundsCC:
+			c := v.Aux.(ssa.PanicBoundsCC).Cx
+			if c >= 0 && c <= abi.BoundsMaxConst {
+				xVal = int(c)
+			} else {
+				// Move constant to a register
+				xIsReg = true
+				p := s.Prog(ppc64.AMOVD)
+				p.From.Type = obj.TYPE_CONST
+				p.From.Offset = c
+				p.To.Type = obj.TYPE_REG
+				p.To.Reg = ppc64.REG_R3 + int16(xVal)
+			}
+			c = v.Aux.(ssa.PanicBoundsCC).Cy
+			if c >= 0 && c <= abi.BoundsMaxConst {
+				yVal = int(c)
+			} else {
+				// Move constant to a register
+				yIsReg = true
+				yVal = 1
+				p := s.Prog(ppc64.AMOVD)
+				p.From.Type = obj.TYPE_CONST
+				p.From.Offset = c
+				p.To.Type = obj.TYPE_REG
+				p.To.Reg = ppc64.REG_R3 + int16(yVal)
+			}
+		}
+		c := abi.BoundsEncode(code, signed, xIsReg, yIsReg, xVal, yVal)
+
+		p := s.Prog(obj.APCDATA)
+		p.From.SetConst(abi.PCDATA_PanicBounds)
+		p.To.SetConst(int64(c))
+		p = s.Prog(obj.ACALL)
 		p.To.Type = obj.TYPE_MEM
 		p.To.Name = obj.NAME_EXTERN
-		p.To.Sym = ssagen.BoundsCheckFunc[v.AuxInt]
+		p.To.Sym = ir.Syms.PanicBounds
-		s.UseArgs(16) // space used in callee args area by assembly stubs
 
 	case ssa.OpPPC64LoweredNilCheck:
 		if buildcfg.GOOS == "aix" {

src/cmd/compile/internal/ssa/_gen/PPC64.rules

@@ -553,9 +553,11 @@
 // Publication barrier as intrinsic
 (PubBarrier ...) => (LoweredPubBarrier ...)
 
-(PanicBounds [kind] x y mem) && boundsABI(kind) == 0 => (LoweredPanicBoundsA [kind] x y mem)
+(PanicBounds ...) => (LoweredPanicBoundsRR ...)
-(PanicBounds [kind] x y mem) && boundsABI(kind) == 1 => (LoweredPanicBoundsB [kind] x y mem)
+(LoweredPanicBoundsRR [kind] x (MOVDconst [c]) mem) => (LoweredPanicBoundsRC [kind] x {PanicBoundsC{C:c}} mem)
-(PanicBounds [kind] x y mem) && boundsABI(kind) == 2 => (LoweredPanicBoundsC [kind] x y mem)
+(LoweredPanicBoundsRR [kind] (MOVDconst [c]) y mem) => (LoweredPanicBoundsCR [kind] {PanicBoundsC{C:c}} y mem)
+(LoweredPanicBoundsRC [kind] {p} (MOVDconst [c]) mem) => (LoweredPanicBoundsCC [kind] {PanicBoundsCC{Cx:c, Cy:p.C}} mem)
+(LoweredPanicBoundsCR [kind] {p} (MOVDconst [c]) mem) => (LoweredPanicBoundsCC [kind] {PanicBoundsCC{Cx:p.C, Cy:c}} mem)
 
 // Optimizations
 // Note that PPC "logical" immediates come in 0:15 and 16:31 unsigned immediate forms,

src/cmd/compile/internal/ssa/_gen/PPC64Ops.go

@@ -171,10 +171,7 @@ func init() {
 		fpstore     = regInfo{inputs: []regMask{gp | sp | sb, fp}}
 		fpstoreidx  = regInfo{inputs: []regMask{gp | sp | sb, gp | sp | sb, fp}}
 		callerSave  = regMask(gp | fp | gr | xer)
-		r3          = buildReg("R3")
+		first8      = buildReg("R3 R4 R5 R6 R7 R8 R9 R10")
-		r4          = buildReg("R4")
-		r5          = buildReg("R5")
-		r6          = buildReg("R6")
 	)
 	ops := []opData{
 		{name: "ADD", argLength: 2, reg: gp21, asm: "ADD", commutative: true},                              // arg0 + arg1
@@ -706,12 +703,16 @@ func init() {
 		{name: "LoweredWB", argLength: 1, reg: regInfo{clobbers: (callerSave &^ buildReg("R0 R3 R4 R5 R6 R7 R8 R9 R10 R14 R15 R16 R17 R20 R21 g")) | buildReg("R31"), outputs: []regMask{buildReg("R29")}}, clobberFlags: true, aux: "Int64"},
 
 		{name: "LoweredPubBarrier", argLength: 1, asm: "LWSYNC", hasSideEffects: true}, // Do data barrier. arg0=memory
-		// There are three of these functions so that they can have three different register inputs.
+
-		// When we check 0 <= c <= cap (A), then 0 <= b <= c (B), then 0 <= a <= b (C), we want the
+		// LoweredPanicBoundsRR takes x and y, two values that caused a bounds check to fail.
-		// default registers to match so we don't need to copy registers around unnecessarily.
+		// the RC and CR versions are used when one of the arguments is a constant. CC is used
-		{name: "LoweredPanicBoundsA", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r5, r6}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go).
+		// when both are constant (normally both 0, as prove derives the fact that a [0] bounds
-		{name: "LoweredPanicBoundsB", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r4, r5}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go).
+		// failure means the length must have also been 0).
-		{name: "LoweredPanicBoundsC", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r3, r4}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go).
+		// AuxInt contains a report code (see PanicBounds in genericOps.go).
+		{name: "LoweredPanicBoundsRR", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{first8, first8}}, typ: "Mem", call: true}, // arg0=x, arg1=y, arg2=mem, returns memory.
+		{name: "LoweredPanicBoundsRC", argLength: 2, aux: "PanicBoundsC", reg: regInfo{inputs: []regMask{first8}}, typ: "Mem", call: true},  // arg0=x, arg1=mem, returns memory.
+		{name: "LoweredPanicBoundsCR", argLength: 2, aux: "PanicBoundsC", reg: regInfo{inputs: []regMask{first8}}, typ: "Mem", call: true},  // arg0=y, arg1=mem, returns memory.
+		{name: "LoweredPanicBoundsCC", argLength: 1, aux: "PanicBoundsCC", reg: regInfo{}, typ: "Mem", call: true},                          // arg0=mem, returns memory.
 
 		// (InvertFlags (CMP a b)) == (CMP b a)
 		// So if we want (LessThan (CMP a b)) but we can't do that because a is a constant,

src/cmd/compile/internal/ssa/opGen.go

@@ -2453,9 +2453,10 @@ const (
 	OpPPC64LoweredAtomicOr32
 	OpPPC64LoweredWB
 	OpPPC64LoweredPubBarrier
-	OpPPC64LoweredPanicBoundsA
+	OpPPC64LoweredPanicBoundsRR
-	OpPPC64LoweredPanicBoundsB
+	OpPPC64LoweredPanicBoundsRC
-	OpPPC64LoweredPanicBoundsC
+	OpPPC64LoweredPanicBoundsCR
+	OpPPC64LoweredPanicBoundsCC
 	OpPPC64InvertFlags
 	OpPPC64FlagEQ
 	OpPPC64FlagLT
@@ -33022,41 +33023,46 @@ var opcodeTable = [...]opInfo{
 		reg:            regInfo{},
 	},
 	{
-		name:    "LoweredPanicBoundsA",
+		name:    "LoweredPanicBoundsRR",
 		auxType: auxInt64,
 		argLen:  3,
 		call:    true,
 		reg: regInfo{
 			inputs: []inputInfo{
-				{0, 32}, // R5
+				{0, 2040}, // R3 R4 R5 R6 R7 R8 R9 R10
-				{1, 64}, // R6
+				{1, 2040}, // R3 R4 R5 R6 R7 R8 R9 R10
 			},
 		},
 	},
 	{
-		name:    "LoweredPanicBoundsB",
+		name:    "LoweredPanicBoundsRC",
-		auxType: auxInt64,
+		auxType: auxPanicBoundsC,
-		argLen:  3,
+		argLen:  2,
 		call:    true,
 		reg: regInfo{
 			inputs: []inputInfo{
-				{0, 16}, // R4
+				{0, 2040}, // R3 R4 R5 R6 R7 R8 R9 R10
-				{1, 32}, // R5
 			},
 		},
 	},
 	{
-		name:    "LoweredPanicBoundsC",
+		name:    "LoweredPanicBoundsCR",
-		auxType: auxInt64,
+		auxType: auxPanicBoundsC,
-		argLen:  3,
+		argLen:  2,
 		call:    true,
 		reg: regInfo{
 			inputs: []inputInfo{
-				{0, 8},  // R3
+				{0, 2040}, // R3 R4 R5 R6 R7 R8 R9 R10
-				{1, 16}, // R4
 			},
 		},
 	},
+	{
+		name:    "LoweredPanicBoundsCC",
+		auxType: auxPanicBoundsCC,
+		argLen:  1,
+		call:    true,
+		reg:     regInfo{},
+	},
 	{
 		name:   "InvertFlags",
 		argLen: 1,

src/cmd/compile/internal/ssa/rewritePPC64.go

@@ -540,6 +540,12 @@ func rewriteValuePPC64(v *Value) bool {
 		return rewriteValuePPC64_OpPPC64LessEqual(v)
 	case OpPPC64LessThan:
 		return rewriteValuePPC64_OpPPC64LessThan(v)
+	case OpPPC64LoweredPanicBoundsCR:
+		return rewriteValuePPC64_OpPPC64LoweredPanicBoundsCR(v)
+	case OpPPC64LoweredPanicBoundsRC:
+		return rewriteValuePPC64_OpPPC64LoweredPanicBoundsRC(v)
+	case OpPPC64LoweredPanicBoundsRR:
+		return rewriteValuePPC64_OpPPC64LoweredPanicBoundsRR(v)
 	case OpPPC64MFVSRD:
 		return rewriteValuePPC64_OpPPC64MFVSRD(v)
 	case OpPPC64MOVBZload:
@@ -667,7 +673,8 @@ func rewriteValuePPC64(v *Value) bool {
 	case OpPPC64XORconst:
 		return rewriteValuePPC64_OpPPC64XORconst(v)
 	case OpPanicBounds:
-		return rewriteValuePPC64_OpPanicBounds(v)
+		v.Op = OpPPC64LoweredPanicBoundsRR
+		return true
 	case OpPopCount16:
 		return rewriteValuePPC64_OpPopCount16(v)
 	case OpPopCount32:
@@ -6826,6 +6833,86 @@ func rewriteValuePPC64_OpPPC64LessThan(v *Value) bool {
 		return true
 	}
 }
+func rewriteValuePPC64_OpPPC64LoweredPanicBoundsCR(v *Value) bool {
+	v_1 := v.Args[1]
+	v_0 := v.Args[0]
+	// match: (LoweredPanicBoundsCR [kind] {p} (MOVDconst [c]) mem)
+	// result: (LoweredPanicBoundsCC [kind] {PanicBoundsCC{Cx:p.C, Cy:c}} mem)
+	for {
+		kind := auxIntToInt64(v.AuxInt)
+		p := auxToPanicBoundsC(v.Aux)
+		if v_0.Op != OpPPC64MOVDconst {
+			break
+		}
+		c := auxIntToInt64(v_0.AuxInt)
+		mem := v_1
+		v.reset(OpPPC64LoweredPanicBoundsCC)
+		v.AuxInt = int64ToAuxInt(kind)
+		v.Aux = panicBoundsCCToAux(PanicBoundsCC{Cx: p.C, Cy: c})
+		v.AddArg(mem)
+		return true
+	}
+	return false
+}
+func rewriteValuePPC64_OpPPC64LoweredPanicBoundsRC(v *Value) bool {
+	v_1 := v.Args[1]
+	v_0 := v.Args[0]
+	// match: (LoweredPanicBoundsRC [kind] {p} (MOVDconst [c]) mem)
+	// result: (LoweredPanicBoundsCC [kind] {PanicBoundsCC{Cx:c, Cy:p.C}} mem)
+	for {
+		kind := auxIntToInt64(v.AuxInt)
+		p := auxToPanicBoundsC(v.Aux)
+		if v_0.Op != OpPPC64MOVDconst {
+			break
+		}
+		c := auxIntToInt64(v_0.AuxInt)
+		mem := v_1
+		v.reset(OpPPC64LoweredPanicBoundsCC)
+		v.AuxInt = int64ToAuxInt(kind)
+		v.Aux = panicBoundsCCToAux(PanicBoundsCC{Cx: c, Cy: p.C})
+		v.AddArg(mem)
+		return true
+	}
+	return false
+}
+func rewriteValuePPC64_OpPPC64LoweredPanicBoundsRR(v *Value) bool {
+	v_2 := v.Args[2]
+	v_1 := v.Args[1]
+	v_0 := v.Args[0]
+	// match: (LoweredPanicBoundsRR [kind] x (MOVDconst [c]) mem)
+	// result: (LoweredPanicBoundsRC [kind] x {PanicBoundsC{C:c}} mem)
+	for {
+		kind := auxIntToInt64(v.AuxInt)
+		x := v_0
+		if v_1.Op != OpPPC64MOVDconst {
+			break
+		}
+		c := auxIntToInt64(v_1.AuxInt)
+		mem := v_2
+		v.reset(OpPPC64LoweredPanicBoundsRC)
+		v.AuxInt = int64ToAuxInt(kind)
+		v.Aux = panicBoundsCToAux(PanicBoundsC{C: c})
+		v.AddArg2(x, mem)
+		return true
+	}
+	// match: (LoweredPanicBoundsRR [kind] (MOVDconst [c]) y mem)
+	// result: (LoweredPanicBoundsCR [kind] {PanicBoundsC{C:c}} y mem)
+	for {
+		kind := auxIntToInt64(v.AuxInt)
+		if v_0.Op != OpPPC64MOVDconst {
+			break
+		}
+		c := auxIntToInt64(v_0.AuxInt)
+		y := v_1
+		mem := v_2
+		v.reset(OpPPC64LoweredPanicBoundsCR)
+		v.AuxInt = int64ToAuxInt(kind)
+		v.Aux = panicBoundsCToAux(PanicBoundsC{C: c})
+		v.AddArg2(y, mem)
+		return true
+	}
+	return false
+}
 func rewriteValuePPC64_OpPPC64MFVSRD(v *Value) bool {
 	v_0 := v.Args[0]
 	b := v.Block
@@ -12981,60 +13068,6 @@ func rewriteValuePPC64_OpPPC64XORconst(v *Value) bool {
 	}
 	return false
 }
-func rewriteValuePPC64_OpPanicBounds(v *Value) bool {
-	v_2 := v.Args[2]
-	v_1 := v.Args[1]
-	v_0 := v.Args[0]
-	// match: (PanicBounds [kind] x y mem)
-	// cond: boundsABI(kind) == 0
-	// result: (LoweredPanicBoundsA [kind] x y mem)
-	for {
-		kind := auxIntToInt64(v.AuxInt)
-		x := v_0
-		y := v_1
-		mem := v_2
-		if !(boundsABI(kind) == 0) {
-			break
-		}
-		v.reset(OpPPC64LoweredPanicBoundsA)
-		v.AuxInt = int64ToAuxInt(kind)
-		v.AddArg3(x, y, mem)
-		return true
-	}
-	// match: (PanicBounds [kind] x y mem)
-	// cond: boundsABI(kind) == 1
-	// result: (LoweredPanicBoundsB [kind] x y mem)
-	for {
-		kind := auxIntToInt64(v.AuxInt)
-		x := v_0
-		y := v_1
-		mem := v_2
-		if !(boundsABI(kind) == 1) {
-			break
-		}
-		v.reset(OpPPC64LoweredPanicBoundsB)
-		v.AuxInt = int64ToAuxInt(kind)
-		v.AddArg3(x, y, mem)
-		return true
-	}
-	// match: (PanicBounds [kind] x y mem)
-	// cond: boundsABI(kind) == 2
-	// result: (LoweredPanicBoundsC [kind] x y mem)
-	for {
-		kind := auxIntToInt64(v.AuxInt)
-		x := v_0
-		y := v_1
-		mem := v_2
-		if !(boundsABI(kind) == 2) {
-			break
-		}
-		v.reset(OpPPC64LoweredPanicBoundsC)
-		v.AuxInt = int64ToAuxInt(kind)
-		v.AddArg3(x, y, mem)
-		return true
-	}
-	return false
-}
 func rewriteValuePPC64_OpPopCount16(v *Value) bool {
 	v_0 := v.Args[0]
 	b := v.Block

src/runtime/asm_ppc64x.s

@@ -1349,67 +1349,30 @@ TEXT runtime·debugCallPanicked(SB),NOSPLIT,$32-16
 	TW	$31, R0, R0
 	RET
 #endif
-// Note: these functions use a special calling convention to save generated code space.
+
-// Arguments are passed in registers, but the space for those arguments are allocated
+TEXT runtime·panicBounds<ABIInternal>(SB),NOSPLIT,$104-0
-// in the caller's stack frame. These stubs write the args into that stack space and
+	// Note: frame size is 16 bytes larger than necessary
-// then tail call to the corresponding runtime handler.
+	// in order to pacify vet. Vet doesn't understand ppc64
-// The tail call makes these stubs disappear in backtraces.
+	// layout properly.
-TEXT runtime·panicIndex<ABIInternal>(SB),NOSPLIT,$0-16
+	NO_LOCAL_POINTERS
-	JMP	runtime·goPanicIndex<ABIInternal>(SB)
+	// Save all 8 int registers that could have an index in them.
-TEXT runtime·panicIndexU<ABIInternal>(SB),NOSPLIT,$0-16
+	// They may be pointers, but if they are they are dead.
-	JMP	runtime·goPanicIndexU<ABIInternal>(SB)
+	// Skip R0 aka ZERO, R1 aka SP, R2 aka SB
-TEXT runtime·panicSliceAlen<ABIInternal>(SB),NOSPLIT,$0-16
+	MOVD	R3, 48(R1)
-	MOVD	R4, R3
+	MOVD	R4, 56(R1)
-	MOVD	R5, R4
+	MOVD	R5, 64(R1)
-	JMP	runtime·goPanicSliceAlen<ABIInternal>(SB)
+	MOVD	R6, 72(R1)
-TEXT runtime·panicSliceAlenU<ABIInternal>(SB),NOSPLIT,$0-16
+	MOVD	R7, 80(R1)
-	MOVD	R4, R3
+	MOVD	R8, 88(R1)
-	MOVD	R5, R4
+	MOVD	R9, 96(R1)
-	JMP	runtime·goPanicSliceAlenU<ABIInternal>(SB)
+	MOVD	R10, 104(R1)
-TEXT runtime·panicSliceAcap<ABIInternal>(SB),NOSPLIT,$0-16
+	// Note: we only save 8 reigsters to keep under nosplit stack limit
-	MOVD	R4, R3
+	// Also, R11 is clobbered in dynamic linking situations
-	MOVD	R5, R4
+
-	JMP	runtime·goPanicSliceAcap<ABIInternal>(SB)
+	MOVD	LR, R3		// PC immediately after call to panicBounds
-TEXT runtime·panicSliceAcapU<ABIInternal>(SB),NOSPLIT,$0-16
+	ADD	$48, R1, R4	// pointer to save area
-	MOVD	R4, R3
+	CALL	runtime·panicBounds64<ABIInternal>(SB)
-	MOVD	R5, R4
+	RET
-	JMP	runtime·goPanicSliceAcapU<ABIInternal>(SB)
-TEXT runtime·panicSliceB<ABIInternal>(SB),NOSPLIT,$0-16
-	JMP	runtime·goPanicSliceB<ABIInternal>(SB)
-TEXT runtime·panicSliceBU<ABIInternal>(SB),NOSPLIT,$0-16
-	JMP	runtime·goPanicSliceBU<ABIInternal>(SB)
-TEXT runtime·panicSlice3Alen<ABIInternal>(SB),NOSPLIT,$0-16
-	MOVD	R5, R3
-	MOVD	R6, R4
-	JMP	runtime·goPanicSlice3Alen<ABIInternal>(SB)
-TEXT runtime·panicSlice3AlenU<ABIInternal>(SB),NOSPLIT,$0-16
-	MOVD	R5, R3
-	MOVD	R6, R4
-	JMP	runtime·goPanicSlice3AlenU<ABIInternal>(SB)
-TEXT runtime·panicSlice3Acap<ABIInternal>(SB),NOSPLIT,$0-16
-	MOVD	R5, R3
-	MOVD	R6, R4
-	JMP	runtime·goPanicSlice3Acap<ABIInternal>(SB)
-TEXT runtime·panicSlice3AcapU<ABIInternal>(SB),NOSPLIT,$0-16
-	MOVD	R5, R3
-	MOVD	R6, R4
-	JMP	runtime·goPanicSlice3AcapU<ABIInternal>(SB)
-TEXT runtime·panicSlice3B<ABIInternal>(SB),NOSPLIT,$0-16
-	MOVD	R4, R3
-	MOVD	R5, R4
-	JMP	runtime·goPanicSlice3B<ABIInternal>(SB)
-TEXT runtime·panicSlice3BU<ABIInternal>(SB),NOSPLIT,$0-16
-	MOVD	R4, R3
-	MOVD	R5, R4
-	JMP	runtime·goPanicSlice3BU<ABIInternal>(SB)
-TEXT runtime·panicSlice3C<ABIInternal>(SB),NOSPLIT,$0-16
-	JMP	runtime·goPanicSlice3C<ABIInternal>(SB)
-TEXT runtime·panicSlice3CU<ABIInternal>(SB),NOSPLIT,$0-16
-	JMP	runtime·goPanicSlice3CU<ABIInternal>(SB)
-TEXT runtime·panicSliceConvert<ABIInternal>(SB),NOSPLIT,$0-16
-	MOVD	R5, R3
-	MOVD	R6, R4
-	JMP	runtime·goPanicSliceConvert<ABIInternal>(SB)
 
 // These functions are used when internal linking cgo with external
 // objects compiled with the -Os on gcc. They reduce prologue/epilogue