cmd/compile/internal/ssa: remove unused Typ fields

These are never accessed.

Change-Id: I45975972d19d1f263f6545c9ed648511501094c6
Reviewed-on: https://go-review.googlesource.com/40315
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

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

@@ -157,7 +157,7 @@ func buildssa(fn *Node) *ssa.Func {
 	for _, n := range fn.Func.Dcl {
 		switch n.Class {
 		case PPARAM, PPARAMOUT:
-			aux := s.lookupSymbol(n, &ssa.ArgSymbol{Typ: n.Type, Node: n})
+			aux := s.lookupSymbol(n, &ssa.ArgSymbol{Node: n})
 			s.decladdrs[n] = s.entryNewValue1A(ssa.OpAddr, types.NewPtr(n.Type), aux, s.sp)
 			if n.Class == PPARAMOUT && s.canSSA(n) {
 				// Save ssa-able PPARAMOUT variables so we can
@@ -3212,18 +3212,18 @@ func (s *state) addr(n *Node, bounded bool) *ssa.Value {
 			}
 			if n == nodfp {
 				// Special arg that points to the frame pointer (Used by ORECOVER).
-				aux := s.lookupSymbol(n, &ssa.ArgSymbol{Typ: n.Type, Node: n})
+				aux := s.lookupSymbol(n, &ssa.ArgSymbol{Node: n})
 				return s.entryNewValue1A(ssa.OpAddr, t, aux, s.sp)
 			}
 			s.Fatalf("addr of undeclared ONAME %v. declared: %v", n, s.decladdrs)
 			return nil
 		case PAUTO:
-			aux := s.lookupSymbol(n, &ssa.AutoSymbol{Typ: n.Type, Node: n})
+			aux := s.lookupSymbol(n, &ssa.AutoSymbol{Node: n})
 			return s.newValue1A(ssa.OpAddr, t, aux, s.sp)
 		case PPARAMOUT: // Same as PAUTO -- cannot generate LEA early.
 			// ensure that we reuse symbols for out parameters so
 			// that cse works on their addresses
-			aux := s.lookupSymbol(n, &ssa.ArgSymbol{Typ: n.Type, Node: n})
+			aux := s.lookupSymbol(n, &ssa.ArgSymbol{Node: n})
 			return s.newValue1A(ssa.OpAddr, t, aux, s.sp)
 		default:
 			s.Fatalf("variable address class %v not implemented", classnames[n.Class])

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

@@ -246,14 +246,12 @@ type ExternSymbol struct {
 // ArgSymbol is an aux value that encodes an argument or result
 // variable's constant offset from FP (FP = SP + framesize).
 type ArgSymbol struct {
-	Typ  Type   // Go type
 	Node GCNode // A *gc.Node referring to the argument/result variable.
 }
 
 // AutoSymbol is an aux value that encodes a local variable's
 // constant offset from SP.
 type AutoSymbol struct {
-	Typ  Type   // Go type
 	Node GCNode // A *gc.Node referring to a local (auto) variable.
 }
 

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

@@ -265,7 +265,7 @@ func wbcall(pos src.XPos, b *Block, fn *obj.LSym, typ interface{}, ptr, val, mem
 		// value we're trying to move.
 		t := val.Type.ElemType()
 		tmp = b.Func.fe.Auto(val.Pos, t)
-		aux := &AutoSymbol{Typ: t, Node: tmp}
+		aux := &AutoSymbol{Node: tmp}
 		mem = b.NewValue1A(pos, OpVarDef, TypeMem, tmp, mem)
 		tmpaddr := b.NewValue1A(pos, OpAddr, t.PtrTo(), aux, sp)
 		siz := t.Size()