diff --git a/src/cmd/compile/internal/ssa/loopreschedchecks.go b/src/cmd/compile/internal/ssa/loopreschedchecks.go
index 5308d1a..2af6e84 100644
--- a/src/cmd/compile/internal/ssa/loopreschedchecks.go
+++ b/src/cmd/compile/internal/ssa/loopreschedchecks.go
@@ -247,7 +247,7 @@
 		//    goto header
 		resched := f.fe.Syslook("goschedguarded")
 		// TODO(register args) -- will need more details
-		mem1 := sched.NewValue1A(bb.Pos, OpStaticCall, types.TypeMem, StaticAuxCall(resched, nil, nil, nil), mem0)
+		mem1 := sched.NewValue1A(bb.Pos, OpStaticCall, types.TypeMem, StaticAuxCall(resched, nil, nil), mem0)
 		sched.AddEdgeTo(h)
 		headerMemPhi.AddArg(mem1)
 
diff --git a/src/cmd/compile/internal/ssa/op.go b/src/cmd/compile/internal/ssa/op.go
index fe9ba0e..9e7e169 100644
--- a/src/cmd/compile/internal/ssa/op.go
+++ b/src/cmd/compile/internal/ssa/op.go
@@ -112,7 +112,6 @@
 type AuxCall struct {
 	// TODO(register args) this information is largely redundant with ../abi information, needs cleanup once new ABI is in place.
 	Fn      *obj.LSym
-	args    []Param // Includes receiver for method calls.  Does NOT include hidden closure pointer.
 	results []Param
 	reg     *regInfo                // regInfo for this call // TODO for now nil means ignore
 	abiInfo *abi.ABIParamResultInfo // TODO remove fields above redundant with this information.
@@ -285,17 +284,6 @@
 		fn = fmt.Sprintf("AuxCall{%v", a.Fn)
 	}
 
-	if len(a.args) == 0 {
-		fn += "()"
-	} else {
-		s := "("
-		for _, arg := range a.args {
-			fn += fmt.Sprintf("%s[%v,%v]", s, arg.Type, arg.Offset)
-			s = ","
-		}
-		fn += ")"
-	}
-
 	if len(a.results) > 0 { // usual is zero or one; only some RT calls have more than one.
 		if len(a.results) == 1 {
 			fn += fmt.Sprintf("[%v,%v]", a.results[0].Type, a.results[0].Offset)
@@ -323,7 +311,7 @@
 }
 
 // StaticAuxCall returns an AuxCall for a static call.
-func StaticAuxCall(sym *obj.LSym, args []Param, results []Param, paramResultInfo *abi.ABIParamResultInfo) *AuxCall {
+func StaticAuxCall(sym *obj.LSym, results []Param, paramResultInfo *abi.ABIParamResultInfo) *AuxCall {
 	if paramResultInfo == nil {
 		panic(fmt.Errorf("Nil paramResultInfo, sym=%v", sym))
 	}
@@ -331,7 +319,7 @@
 	if paramResultInfo.InRegistersUsed()+paramResultInfo.OutRegistersUsed() > 0 {
 		reg = &regInfo{}
 	}
-	return &AuxCall{Fn: sym, args: args, results: results, abiInfo: paramResultInfo, reg: reg}
+	return &AuxCall{Fn: sym, results: results, abiInfo: paramResultInfo, reg: reg}
 }
 
 // InterfaceAuxCall returns an AuxCall for an interface call.
@@ -340,7 +328,7 @@
 	if paramResultInfo.InRegistersUsed()+paramResultInfo.OutRegistersUsed() > 0 {
 		reg = &regInfo{}
 	}
-	return &AuxCall{Fn: nil, args: args, results: results, abiInfo: paramResultInfo, reg: reg}
+	return &AuxCall{Fn: nil, results: results, abiInfo: paramResultInfo, reg: reg}
 }
 
 // ClosureAuxCall returns an AuxCall for a closure call.
@@ -349,7 +337,7 @@
 	if paramResultInfo.InRegistersUsed()+paramResultInfo.OutRegistersUsed() > 0 {
 		reg = &regInfo{}
 	}
-	return &AuxCall{Fn: nil, args: args, results: results, abiInfo: paramResultInfo, reg: reg}
+	return &AuxCall{Fn: nil, results: results, abiInfo: paramResultInfo, reg: reg}
 }
 
 func (*AuxCall) CanBeAnSSAAux() {}
@@ -361,7 +349,7 @@
 	if paramResultInfo.InRegistersUsed()+paramResultInfo.OutRegistersUsed() > 0 {
 		reg = &regInfo{}
 	}
-	return &AuxCall{Fn: fn, args: args, results: results, abiInfo: paramResultInfo, reg: reg}
+	return &AuxCall{Fn: fn, results: results, abiInfo: paramResultInfo, reg: reg}
 }
 
 const (
diff --git a/src/cmd/compile/internal/ssa/rewrite.go b/src/cmd/compile/internal/ssa/rewrite.go
index 3c222f8..9e67c34 100644
--- a/src/cmd/compile/internal/ssa/rewrite.go
+++ b/src/cmd/compile/internal/ssa/rewrite.go
@@ -765,7 +765,7 @@
 		return nil
 	}
 	va := aux.(*AuxCall)
-	return StaticAuxCall(lsym, va.args, va.results, va.abiInfo)
+	return StaticAuxCall(lsym, va.results, va.abiInfo)
 }
 
 // de-virtualize an InterLECall
diff --git a/src/cmd/compile/internal/ssa/writebarrier.go b/src/cmd/compile/internal/ssa/writebarrier.go
index 0af0395..9b956a4 100644
--- a/src/cmd/compile/internal/ssa/writebarrier.go
+++ b/src/cmd/compile/internal/ssa/writebarrier.go
@@ -516,7 +516,7 @@
 	off = round(off, config.PtrSize)
 
 	// issue call
-	mem = b.NewValue1A(pos, OpStaticCall, types.TypeResultMem, StaticAuxCall(fn, ACArgs, nil, b.Func.ABIDefault.ABIAnalyzeTypes(nil, argTypes, nil)), mem)
+	mem = b.NewValue1A(pos, OpStaticCall, types.TypeResultMem, StaticAuxCall(fn, nil, b.Func.ABIDefault.ABIAnalyzeTypes(nil, argTypes, nil)), mem)
 	mem.AuxInt = off - config.ctxt.FixedFrameSize()
 	return b.NewValue1I(pos, OpSelectN, types.TypeMem, 0, mem)
 }
diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go
index 5d23b3b..f142810 100644
--- a/src/cmd/compile/internal/ssagen/ssa.go
+++ b/src/cmd/compile/internal/ssagen/ssa.go
@@ -4814,8 +4814,7 @@
 			aux := ssa.ClosureAuxCall(ACArgs, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
 			call = s.newValue2A(ssa.OpClosureLECall, aux.LateExpansionResultType(), aux, codeptr, v)
 		} else {
-			aux := ssa.StaticAuxCall(fn.(*ir.Name).Linksym(), ACArgs, ACResults,
-				s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
+			aux := ssa.StaticAuxCall(fn.(*ir.Name).Linksym(), ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
 			call = s.newValue0A(ssa.OpStaticLECall, aux.LateExpansionResultType(), aux)
 		}
 		callArgs = append(callArgs, s.mem())
@@ -4995,8 +4994,7 @@
 
 		// Call runtime.deferprocStack with pointer to _defer record.
 		ACArgs = append(ACArgs, ssa.Param{Type: types.Types[types.TUINTPTR], Offset: int32(base.Ctxt.FixedFrameSize())})
-		aux := ssa.StaticAuxCall(ir.Syms.DeferprocStack, ACArgs, ACResults,
-			s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
+		aux := ssa.StaticAuxCall(ir.Syms.DeferprocStack, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
 		callArgs = append(callArgs, addr, s.mem())
 		call = s.newValue0A(ssa.OpStaticLECall, aux.LateExpansionResultType(), aux)
 		call.AddArgs(callArgs...)
@@ -5058,12 +5056,10 @@
 		// call target
 		switch {
 		case k == callDefer:
-			aux := ssa.StaticAuxCall(ir.Syms.Deferproc, ACArgs, ACResults,
-				s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults))) // TODO paramResultInfo for DeferProc
+			aux := ssa.StaticAuxCall(ir.Syms.Deferproc, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults))) // TODO paramResultInfo for DeferProc
 			call = s.newValue0A(ssa.OpStaticLECall, aux.LateExpansionResultType(), aux)
 		case k == callGo:
-			aux := ssa.StaticAuxCall(ir.Syms.Newproc, ACArgs, ACResults,
-				s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
+			aux := ssa.StaticAuxCall(ir.Syms.Newproc, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, ssa.ACParamsToTypes(ACArgs), ssa.ACParamsToTypes(ACResults)))
 			call = s.newValue0A(ssa.OpStaticLECall, aux.LateExpansionResultType(), aux) // TODO paramResultInfo for NewProc
 		case closure != nil:
 			// rawLoad because loading the code pointer from a
@@ -5079,7 +5075,7 @@
 			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)
+			aux := ssa.StaticAuxCall(callTargetLSym(callee, s.curfn.LSym), ACResults, params)
 			call = s.newValue0A(ssa.OpStaticLECall, aux.LateExpansionResultType(), aux)
 		default:
 			s.Fatalf("bad call type %v %v", n.Op(), n)
@@ -5546,7 +5542,7 @@
 
 	// Issue call
 	var call *ssa.Value
-	aux := ssa.StaticAuxCall(fn, ACArgs, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, callArgTypes, results))
+	aux := ssa.StaticAuxCall(fn, ACResults, s.f.ABIDefault.ABIAnalyzeTypes(nil, callArgTypes, results))
 	callArgs = append(callArgs, s.mem())
 	call = s.newValue0A(ssa.OpStaticLECall, aux.LateExpansionResultType(), aux)
 	call.AddArgs(callArgs...)