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cmd/compile: test register ABI for method, interface, closure calls
This is enabled with a ridiculous magic name for method, or for last input type passed, that needs to be changed to something inutterable before actual release. Ridiculous method name: MagicMethodNameForTestingRegisterABI Ridiculous last (input) type name: MagicLastTypeNameForTestingRegisterABI RLTN is tested with strings.Contains, so you can have MagicLastTypeNameForTestingRegisterABI1 and MagicLastTypeNameForTestingRegisterABI2 if that is helpful Includes test test/abi/fibish2.go Updates #44816. Change-Id: I592a6edc71ca9bebdd1d00e24edee1ceebb3e43f Reviewed-on: https://go-review.googlesource.com/c/go/+/299410 Trust: David Chase <drchase@google.com> Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
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cdd08e615a
commit
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@ -386,41 +386,34 @@ func (x *expandState) rewriteSelect(leaf *Value, selector *Value, offset int64,
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which := selector.AuxInt
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if which == aux.NResults() { // mem is after the results.
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// rewrite v as a Copy of call -- the replacement call will produce a mem.
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if call.Op == OpStaticLECall {
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if leaf != selector {
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panic("Unexpected selector of memory")
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}
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// StaticCall selector will address last element of Result.
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// TODO do this for all the other call types eventually.
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if aux.abiInfo == nil {
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panic(badVal("aux.abiInfo nil for call", call))
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}
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if existing := x.memForCall[call.ID]; existing == nil {
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selector.AuxInt = int64(aux.abiInfo.OutRegistersUsed())
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x.memForCall[call.ID] = selector
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} else {
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selector.copyOf(existing)
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}
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} else {
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leaf.copyOf(call)
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if leaf != selector {
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panic("Unexpected selector of memory")
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}
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if aux.abiInfo == nil {
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panic(badVal("aux.abiInfo nil for call", call))
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}
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if existing := x.memForCall[call.ID]; existing == nil {
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selector.AuxInt = int64(aux.abiInfo.OutRegistersUsed())
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x.memForCall[call.ID] = selector
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} else {
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selector.copyOf(existing)
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}
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} else {
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leafType := removeTrivialWrapperTypes(leaf.Type)
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if x.canSSAType(leafType) {
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pt := types.NewPtr(leafType)
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// Any selection right out of the arg area/registers has to be same Block as call, use call as mem input.
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if call.Op == OpStaticLECall { // TODO this is temporary until all calls are register-able
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// Create a "mem" for any loads that need to occur.
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if mem := x.memForCall[call.ID]; mem != nil {
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if mem.Block != call.Block {
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panic(fmt.Errorf("selector and call need to be in same block, selector=%s; call=%s", selector.LongString(), call.LongString()))
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}
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call = mem
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} else {
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mem = call.Block.NewValue1I(call.Pos.WithNotStmt(), OpSelectN, types.TypeMem, int64(aux.abiInfo.OutRegistersUsed()), call)
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x.memForCall[call.ID] = mem
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call = mem
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// Create a "mem" for any loads that need to occur.
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if mem := x.memForCall[call.ID]; mem != nil {
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if mem.Block != call.Block {
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panic(fmt.Errorf("selector and call need to be in same block, selector=%s; call=%s", selector.LongString(), call.LongString()))
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}
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call = mem
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} else {
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mem = call.Block.NewValue1I(call.Pos.WithNotStmt(), OpSelectN, types.TypeMem, int64(aux.abiInfo.OutRegistersUsed()), call)
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x.memForCall[call.ID] = mem
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call = mem
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}
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outParam := aux.abiInfo.OutParam(int(which))
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if len(outParam.Registers) > 0 {
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@ -1350,14 +1343,15 @@ func expandCalls(f *Func) {
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case OpStaticLECall:
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v.Op = OpStaticCall
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rts := abi.RegisterTypes(v.Aux.(*AuxCall).abiInfo.OutParams())
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// TODO need to insert all the register types.
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v.Type = types.NewResults(append(rts, types.TypeMem))
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case OpClosureLECall:
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v.Op = OpClosureCall
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v.Type = types.TypeMem
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rts := abi.RegisterTypes(v.Aux.(*AuxCall).abiInfo.OutParams())
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v.Type = types.NewResults(append(rts, types.TypeMem))
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case OpInterLECall:
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v.Op = OpInterCall
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v.Type = types.TypeMem
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rts := abi.RegisterTypes(v.Aux.(*AuxCall).abiInfo.OutParams())
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v.Type = types.NewResults(append(rts, types.TypeMem))
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}
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}
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}
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@ -775,10 +775,10 @@ func init() {
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faultOnNilArg0: true,
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},
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// With a register ABI, the actual register info for these instructions (i.e., what is used in regalloc) is augmented with per-call-site bindings of additional arguments to specific registers.
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{name: "CALLstatic", argLength: -1, reg: regInfo{clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call static function aux.(*obj.LSym). arg0=mem, auxint=argsize, returns mem
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{name: "CALLclosure", argLength: 3, reg: regInfo{inputs: []regMask{gpsp, buildReg("DX"), 0}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem
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{name: "CALLinter", argLength: 2, reg: regInfo{inputs: []regMask{gp}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem
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// With a register ABI, the actual register info for these instructions (i.e., what is used in regalloc) is augmented with per-call-site bindings of additional arguments to specific in and out registers.
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{name: "CALLstatic", argLength: -1, reg: regInfo{clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call static function aux.(*obj.LSym). last arg=mem, auxint=argsize, returns mem
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{name: "CALLclosure", argLength: -1, reg: regInfo{inputs: []regMask{gpsp, buildReg("DX"), 0}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call function via closure. arg0=codeptr, arg1=closure, last arg=mem, auxint=argsize, returns mem
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{name: "CALLinter", argLength: -1, reg: regInfo{inputs: []regMask{gp}, clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call fn by pointer. arg0=codeptr, last arg=mem, auxint=argsize, returns mem
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// arg0 = destination pointer
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// arg1 = source pointer
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@ -264,7 +264,7 @@ var genericOps = []opData{
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// ±0 → ±0 (sign preserved)
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// x<0 → NaN
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// NaN → NaN
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{name: "Sqrt", argLength: 1}, // √arg0 (floating point, double precision)
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{name: "Sqrt", argLength: 1}, // √arg0 (floating point, double precision)
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{name: "Sqrt32", argLength: 1}, // √arg0 (floating point, single precision)
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// Round to integer, float64 only.
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@ -396,9 +396,28 @@ var genericOps = []opData{
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// TODO(josharian): ClosureCall and InterCall should have Int32 aux
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// to match StaticCall's 32 bit arg size limit.
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// TODO(drchase,josharian): could the arg size limit be bundled into the rules for CallOff?
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{name: "ClosureCall", argLength: 3, aux: "CallOff", call: true}, // arg0=code pointer, arg1=context ptr, arg2=memory. auxint=arg size. Returns memory.
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{name: "StaticCall", argLength: -1, aux: "CallOff", call: true}, // call function aux.(*obj.LSym), arg0..argN-1 are register inputs, argN=memory. auxint=arg size. Returns Result of register results, plus memory.
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{name: "InterCall", argLength: 2, aux: "CallOff", call: true}, // interface call. arg0=code pointer, arg1=memory, auxint=arg size. Returns memory.
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// Before lowering, LECalls receive their fixed inputs (first), memory (last),
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// and a variable number of input values in the middle.
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// They produce a variable number of result values.
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// These values are not necessarily "SSA-able"; they can be too large,
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// but in that case inputs are loaded immediately before with OpDereference,
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// and outputs are stored immediately with OpStore.
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//
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// After call expansion, Calls have the same fixed-middle-memory arrangement of inputs,
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// with the difference that the "middle" is only the register-resident inputs,
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// and the non-register inputs are instead stored at ABI-defined offsets from SP
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// (and the stores thread through the memory that is ultimately an input to the call).
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// Outputs follow a similar pattern; register-resident outputs are the leading elements
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// of a Result-typed output, with memory last, and any memory-resident outputs have been
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// stored to ABI-defined locations. Each non-memory input or output fits in a register.
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//
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// Subsequent architecture-specific lowering only changes the opcode.
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{name: "ClosureCall", argLength: -1, aux: "CallOff", call: true}, // arg0=code pointer, arg1=context ptr, arg2..argN-1 are register inputs, argN=memory. auxint=arg size. Returns Result of register results, plus memory.
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{name: "StaticCall", argLength: -1, aux: "CallOff", call: true}, // call function aux.(*obj.LSym), arg0..argN-1 are register inputs, argN=memory. auxint=arg size. Returns Result of register results, plus memory.
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{name: "InterCall", argLength: -1, aux: "CallOff", call: true}, // interface call. arg0=code pointer, arg1..argN-1 are register inputs, argN=memory, auxint=arg size. Returns Result of register results, plus memory.
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{name: "ClosureLECall", argLength: -1, aux: "CallOff", call: true}, // late-expanded closure call. arg0=code pointer, arg1=context ptr, arg2..argN-1 are inputs, argN is mem. auxint = arg size. Result is tuple of result(s), plus mem.
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{name: "StaticLECall", argLength: -1, aux: "CallOff", call: true}, // late-expanded static call function aux.(*ssa.AuxCall.Fn). arg0..argN-1 are inputs, argN is mem. auxint = arg size. Result is tuple of result(s), plus mem.
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{name: "InterLECall", argLength: -1, aux: "CallOff", call: true}, // late-expanded interface call. arg0=code pointer, arg1..argN-1 are inputs, argN is mem. auxint = arg size. Result is tuple of result(s), plus mem.
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@ -10,6 +10,7 @@ import (
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"cmd/compile/internal/types"
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"cmd/internal/obj"
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"fmt"
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"strings"
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)
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// An Op encodes the specific operation that a Value performs.
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@ -68,6 +69,27 @@ type regInfo struct {
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outputs []outputInfo
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}
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func (r *regInfo) String() string {
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s := ""
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s += "INS:\n"
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for _, i := range r.inputs {
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mask := fmt.Sprintf("%64b", i.regs)
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mask = strings.Replace(mask, "0", ".", -1)
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s += fmt.Sprintf("%2d |%s|\n", i.idx, mask)
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}
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s += "OUTS:\n"
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for _, i := range r.outputs {
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mask := fmt.Sprintf("%64b", i.regs)
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mask = strings.Replace(mask, "0", ".", -1)
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s += fmt.Sprintf("%2d |%s|\n", i.idx, mask)
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}
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s += "CLOBBERS:\n"
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mask := fmt.Sprintf("%64b", r.clobbers)
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mask = strings.Replace(mask, "0", ".", -1)
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s += fmt.Sprintf(" |%s|\n", mask)
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return s
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}
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type auxType int8
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type Param struct {
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@ -116,20 +138,25 @@ func (a *AuxCall) Reg(i *regInfo, c *Config) *regInfo {
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a.reg = i
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return a.reg
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}
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a.reg.inputs = append(a.reg.inputs, i.inputs...)
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k := len(i.inputs)
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for _, p := range a.abiInfo.InParams() {
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for _, r := range p.Registers {
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m := archRegForAbiReg(r, c)
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a.reg.inputs = append(a.reg.inputs, inputInfo{idx: len(a.reg.inputs), regs: (1 << m)})
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a.reg.inputs = append(a.reg.inputs, inputInfo{idx: k, regs: (1 << m)})
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k++
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}
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}
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a.reg.outputs = append(a.reg.outputs, i.outputs...)
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a.reg.inputs = append(a.reg.inputs, i.inputs...) // These are less constrained, thus should come last
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k = len(i.outputs)
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for _, p := range a.abiInfo.OutParams() {
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for _, r := range p.Registers {
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m := archRegForAbiReg(r, c)
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a.reg.outputs = append(a.reg.outputs, outputInfo{idx: len(a.reg.outputs), regs: (1 << m)})
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a.reg.outputs = append(a.reg.outputs, outputInfo{idx: k, regs: (1 << m)})
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k++
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}
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}
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a.reg.outputs = append(a.reg.outputs, i.outputs...)
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a.reg.clobbers = i.clobbers
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return a.reg
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}
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@ -299,12 +326,20 @@ func StaticAuxCall(sym *obj.LSym, args []Param, results []Param, paramResultInfo
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// InterfaceAuxCall returns an AuxCall for an interface call.
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func InterfaceAuxCall(args []Param, results []Param, paramResultInfo *abi.ABIParamResultInfo) *AuxCall {
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return &AuxCall{Fn: nil, args: args, results: results, abiInfo: paramResultInfo}
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var reg *regInfo
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if paramResultInfo.InRegistersUsed()+paramResultInfo.OutRegistersUsed() > 0 {
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reg = ®Info{}
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}
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return &AuxCall{Fn: nil, args: args, results: results, abiInfo: paramResultInfo, reg: reg}
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}
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// ClosureAuxCall returns an AuxCall for a closure call.
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func ClosureAuxCall(args []Param, results []Param, paramResultInfo *abi.ABIParamResultInfo) *AuxCall {
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return &AuxCall{Fn: nil, args: args, results: results, abiInfo: paramResultInfo}
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var reg *regInfo
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if paramResultInfo.InRegistersUsed()+paramResultInfo.OutRegistersUsed() > 0 {
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reg = ®Info{}
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}
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return &AuxCall{Fn: nil, args: args, results: results, abiInfo: paramResultInfo, reg: reg}
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}
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func (*AuxCall) CanBeAnSSAAux() {}
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@ -13275,7 +13275,7 @@ var opcodeTable = [...]opInfo{
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{
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name: "CALLclosure",
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auxType: auxCallOff,
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argLen: 3,
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argLen: -1,
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clobberFlags: true,
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call: true,
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reg: regInfo{
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@ -13289,7 +13289,7 @@ var opcodeTable = [...]opInfo{
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{
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name: "CALLinter",
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auxType: auxCallOff,
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argLen: 2,
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argLen: -1,
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clobberFlags: true,
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call: true,
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reg: regInfo{
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@ -35596,7 +35596,7 @@ var opcodeTable = [...]opInfo{
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{
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name: "ClosureCall",
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auxType: auxCallOff,
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argLen: 3,
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argLen: -1,
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call: true,
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generic: true,
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},
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@ -35610,7 +35610,7 @@ var opcodeTable = [...]opInfo{
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{
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name: "InterCall",
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auxType: auxCallOff,
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argLen: 2,
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argLen: -1,
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call: true,
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generic: true,
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},
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@ -217,6 +217,10 @@ func AbiForFunc(fn *ir.Func) *abi.ABIConfig {
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return abiForFunc(fn, ssaConfig.ABI0, ssaConfig.ABI1).Copy() // No idea what races will result, be safe
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}
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// TODO (NLT 2021-04-15) This must be changed to a name that cannot match; it may be helpful to other register ABI work to keep the trigger-logic
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const magicNameDotSuffix = ".MagicMethodNameForTestingRegisterABI"
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const magicLastTypeName = "MagicLastTypeNameForTestingRegisterABI"
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// abiForFunc implements ABI policy for a function, but does not return a copy of the ABI.
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// Passing a nil function returns ABIInternal.
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func abiForFunc(fn *ir.Func, abi0, abi1 *abi.ABIConfig) *abi.ABIConfig {
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@ -224,16 +228,38 @@ func abiForFunc(fn *ir.Func, abi0, abi1 *abi.ABIConfig) *abi.ABIConfig {
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if !regabiEnabledForAllCompilation() {
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a = abi0
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}
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if fn != nil && fn.Pragma&ir.RegisterParams != 0 { // TODO(register args) remove after register abi is working
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if fn != nil {
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name := ir.FuncName(fn)
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if strings.Contains(name, ".") {
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base.ErrorfAt(fn.Pos(), "Calls to //go:registerparams method %s won't work, remove the pragma from the declaration.", name)
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magicName := strings.HasSuffix(name, magicNameDotSuffix)
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if fn.Pragma&ir.RegisterParams != 0 { // TODO(register args) remove after register abi is working
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if strings.Contains(name, ".") {
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if !magicName {
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base.ErrorfAt(fn.Pos(), "Calls to //go:registerparams method %s won't work, remove the pragma from the declaration.", name)
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}
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}
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a = abi1
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} else if magicName {
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if base.FmtPos(fn.Pos()) == "<autogenerated>:1" {
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// no way to put a pragma here, and it will error out in the real source code if they did not do it there.
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a = abi1
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} else {
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base.ErrorfAt(fn.Pos(), "Methods with magic name %s (method %s) must also specify //go:registerparams", magicNameDotSuffix[1:], name)
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}
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}
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if regAbiForFuncType(fn.Type().FuncType()) {
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// fmt.Printf("Saw magic last type name for function %s\n", name)
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a = abi1
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}
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a = abi1
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}
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return a
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}
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func regAbiForFuncType(ft *types.Func) bool {
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np := ft.Params.NumFields()
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return np > 0 && strings.Contains(ft.Params.FieldType(np-1).String(), magicLastTypeName)
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}
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func regabiEnabledForAllCompilation() bool {
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// TODO compiler does not yet change behavior for GOEXPERIMENT=regabi
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return false && objabi.Regabi_enabled != 0
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@ -4863,6 +4889,22 @@ func (s *state) call(n *ir.CallExpr, k callKind, returnResultAddr bool) *ssa.Val
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var callArgs []*ssa.Value // For late-expansion, the args themselves (not stored, args to the call instead).
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inRegisters := false
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var magicFnNameSym *types.Sym
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if fn.Name() != nil {
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magicFnNameSym = fn.Name().Sym()
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ss := magicFnNameSym.Name
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if strings.HasSuffix(ss, magicNameDotSuffix) {
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inRegisters = true
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}
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}
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if magicFnNameSym == nil && n.Op() == ir.OCALLINTER {
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magicFnNameSym = fn.(*ir.SelectorExpr).Sym()
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ss := magicFnNameSym.Name
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if strings.HasSuffix(ss, magicNameDotSuffix[1:]) {
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inRegisters = true
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}
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}
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switch n.Op() {
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case ir.OCALLFUNC:
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if k == callNormal && fn.Op() == ir.ONAME && fn.(*ir.Name).Class == ir.PFUNC {
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@ -4871,7 +4913,7 @@ func (s *state) call(n *ir.CallExpr, k callKind, returnResultAddr bool) *ssa.Val
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// TODO(register args) remove after register abi is working
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inRegistersImported := fn.Pragma()&ir.RegisterParams != 0
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inRegistersSamePackage := fn.Func != nil && fn.Func.Pragma&ir.RegisterParams != 0
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inRegisters = inRegistersImported || inRegistersSamePackage
|
||||
inRegisters = inRegisters || inRegistersImported || inRegistersSamePackage
|
||||
break
|
||||
}
|
||||
closure = s.expr(fn)
|
||||
@ -4898,6 +4940,11 @@ func (s *state) call(n *ir.CallExpr, k callKind, returnResultAddr bool) *ssa.Val
|
||||
types.CalcSize(fn.Type())
|
||||
stksize := fn.Type().ArgWidth() // includes receiver, args, and results
|
||||
|
||||
if regAbiForFuncType(n.X.Type().FuncType()) {
|
||||
// fmt.Printf("Saw magic last type in call %v\n", n)
|
||||
inRegisters = true
|
||||
}
|
||||
|
||||
callABI := s.f.ABI1
|
||||
if !inRegisters {
|
||||
callABI = s.f.ABI0
|
||||
@ -5047,11 +5094,11 @@ func (s *state) call(n *ir.CallExpr, k callKind, returnResultAddr bool) *ssa.Val
|
||||
// critical that we not clobber any arguments already
|
||||
// stored onto the stack.
|
||||
codeptr = s.rawLoad(types.Types[types.TUINTPTR], closure)
|
||||
aux := ssa.ClosureAuxCall(ACArgs, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
|
||||
aux := ssa.ClosureAuxCall(ACArgs, ACResults, callABI.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
|
||||
call = s.newValue2A(ssa.OpClosureLECall, aux.LateExpansionResultType(), aux, codeptr, closure)
|
||||
case codeptr != nil:
|
||||
// Note that the "receiver" parameter is nil because the actual receiver is the first input parameter.
|
||||
aux := ssa.InterfaceAuxCall(ACArgs, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
|
||||
aux := ssa.InterfaceAuxCall(ACArgs, ACResults, params)
|
||||
call = s.newValue1A(ssa.OpInterLECall, aux.LateExpansionResultType(), aux, codeptr)
|
||||
case callee != nil:
|
||||
aux := ssa.StaticAuxCall(callTargetLSym(callee, s.curfn.LSym), ACArgs, ACResults, params)
|
||||
|
40
test/abi/fibish2.go
Normal file
40
test/abi/fibish2.go
Normal file
@ -0,0 +1,40 @@
|
||||
// run
|
||||
|
||||
//go:build !wasm
|
||||
// +build !wasm
|
||||
|
||||
// Copyright 2021 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package main
|
||||
|
||||
import "fmt"
|
||||
|
||||
// Test that register results are correctly returned (and passed)
|
||||
|
||||
type MagicLastTypeNameForTestingRegisterABI func(int,MagicLastTypeNameForTestingRegisterABI) int
|
||||
|
||||
//go:registerparams
|
||||
//go:noinline
|
||||
func minus(decrement int) MagicLastTypeNameForTestingRegisterABI {
|
||||
return MagicLastTypeNameForTestingRegisterABI( func(x int, _ MagicLastTypeNameForTestingRegisterABI) int { return x-decrement} )
|
||||
}
|
||||
|
||||
//go:noinline
|
||||
func f(x int, sub1 MagicLastTypeNameForTestingRegisterABI) (int, int) {
|
||||
|
||||
if x < 3 {
|
||||
return 0, x
|
||||
}
|
||||
|
||||
a, b := f(sub1(sub1(x, sub1), sub1), sub1)
|
||||
c, d := f(sub1(x, sub1), sub1)
|
||||
return a + d, b + c
|
||||
}
|
||||
|
||||
func main() {
|
||||
x := 40
|
||||
a, b := f(x, minus(1))
|
||||
fmt.Printf("f(%d)=%d,%d\n", x, a, b)
|
||||
}
|
1
test/abi/fibish2.out
Normal file
1
test/abi/fibish2.out
Normal file
@ -0,0 +1 @@
|
||||
f(40)=39088169,126491972
|
34
test/abi/fibish_closure.go
Normal file
34
test/abi/fibish_closure.go
Normal file
@ -0,0 +1,34 @@
|
||||
// run
|
||||
|
||||
//go:build !wasm
|
||||
// +build !wasm
|
||||
|
||||
// Copyright 2021 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package main
|
||||
|
||||
import "fmt"
|
||||
|
||||
// Test that register results are correctly returned (and passed)
|
||||
|
||||
type MagicLastTypeNameForTestingRegisterABI func(int, MagicLastTypeNameForTestingRegisterABI) (int, int)
|
||||
|
||||
//go:noinline
|
||||
func f(x int, unused MagicLastTypeNameForTestingRegisterABI) (int, int) {
|
||||
|
||||
if x < 3 {
|
||||
return 0, x
|
||||
}
|
||||
|
||||
a, b := f(x-2, unused)
|
||||
c, d := f(x-1, unused)
|
||||
return a + d, b + c
|
||||
}
|
||||
|
||||
func main() {
|
||||
x := 40
|
||||
a, b := f(x, f)
|
||||
fmt.Printf("f(%d)=%d,%d\n", x, a, b)
|
||||
}
|
1
test/abi/fibish_closure.out
Normal file
1
test/abi/fibish_closure.out
Normal file
@ -0,0 +1 @@
|
||||
f(40)=39088169,126491972
|
51
test/abi/methods.go
Normal file
51
test/abi/methods.go
Normal file
@ -0,0 +1,51 @@
|
||||
// run
|
||||
|
||||
//go:build !wasm
|
||||
// +build !wasm
|
||||
|
||||
// Copyright 2021 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
)
|
||||
|
||||
type toobig struct {
|
||||
a,b,c string
|
||||
}
|
||||
|
||||
//go:registerparams
|
||||
//go:noinline
|
||||
func (x *toobig) MagicMethodNameForTestingRegisterABI(y toobig, z toobig) toobig {
|
||||
return toobig{x.a, y.b, z.c}
|
||||
}
|
||||
|
||||
type AnInterface interface {
|
||||
MagicMethodNameForTestingRegisterABI(y toobig, z toobig) toobig
|
||||
}
|
||||
|
||||
//go:registerparams
|
||||
//go:noinline
|
||||
func I(a,b,c string) toobig {
|
||||
return toobig{a,b,c}
|
||||
}
|
||||
|
||||
// AnIid prevents the compiler from figuring out what the interface really is.
|
||||
//go:noinline
|
||||
func AnIid(x AnInterface) AnInterface {
|
||||
return x
|
||||
}
|
||||
|
||||
var tmp toobig
|
||||
func main() {
|
||||
x := I("Ahoy", "1,", "2")
|
||||
y := I("3", "there,", "4")
|
||||
z := I("5", "6,", "Matey")
|
||||
tmp = x.MagicMethodNameForTestingRegisterABI(y,z)
|
||||
fmt.Println(tmp.a, tmp.b, tmp.c)
|
||||
tmp = AnIid(&x).MagicMethodNameForTestingRegisterABI(y,z)
|
||||
fmt.Println(tmp.a, tmp.b, tmp.c)
|
||||
}
|
2
test/abi/methods.out
Normal file
2
test/abi/methods.out
Normal file
@ -0,0 +1,2 @@
|
||||
Ahoy there, Matey
|
||||
Ahoy there, Matey
|
Loading…
Reference in New Issue
Block a user