cmd/compile: simple cleanups

Change-Id: If2cf3c5a29afc6cf74c3b08b9745e950231ead37
Reviewed-on: https://go-review.googlesource.com/29441Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

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

@@ -1690,7 +1690,7 @@ func (s *state) expr(n *Node) *ssa.Value {
 			op := s.ssaOp(OEQ, pt)
 			r := s.newValue2(op, Types[TBOOL], s.newValue1(ssa.OpComplexReal, pt, a), s.newValue1(ssa.OpComplexReal, pt, b))
 			i := s.newValue2(op, Types[TBOOL], s.newValue1(ssa.OpComplexImag, pt, a), s.newValue1(ssa.OpComplexImag, pt, b))
-			c := s.newValue2(ssa.OpAnd8, Types[TBOOL], r, i)
+			c := s.newValue2(ssa.OpAndB, Types[TBOOL], r, i)
 			switch n.Op {
 			case OEQ:
 				return c

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

@@ -9,7 +9,6 @@ import (
 	"internal/testenv"
 	"os/exec"
 	"path/filepath"
-	"runtime"
 	"strings"
 	"testing"
 )
@@ -49,12 +48,7 @@ func TestBreakContinue(t *testing.T) { runTest(t, "break.go") }
 func TestTypeAssertion(t *testing.T) { runTest(t, "assert.go") }
 
 // TestArithmetic tests that both backends have the same result for arithmetic expressions.
-func TestArithmetic(t *testing.T) {
-	if runtime.GOARCH == "386" {
-		t.Skip("legacy 386 compiler can't handle this test")
-	}
-	runTest(t, "arith.go")
-}
+func TestArithmetic(t *testing.T) { runTest(t, "arith.go") }
 
 // TestFP tests that both backends have the same result for floating point expressions.
 func TestFP(t *testing.T) { runTest(t, "fp.go") }