cmd/compile/internal/types2: fix tests on js/wasm

The js/wasm builder started failing as of CL 432535 due to needing
'go build' to import standard-library packages that are no longer
installed to GOROOT/pkg. Since js/wasm can't exec subprocesses,
it cannot run 'go build' to generate the export data needed for
these tests.

For #47257.

Change-Id: I804235fd725faf00b27cbed79ee1f43dea8ab734
Reviewed-on: https://go-review.googlesource.com/c/go/+/446635
Run-TryBot: Bryan Mills <[email protected]>
Reviewed-by: Robert Griesemer <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Bryan Mills <[email protected]>

Author: Bryan C. Mills

src/cmd/compile/internal/types2/example_test.go

@@ -5,7 +5,7 @@
 // Only run where builders (build.golang.org) have
 // access to compiled packages for import.
 //
-//go:build !arm && !arm64
+//go:build !android && !ios && !js
 
 package types2_test
 

src/cmd/compile/internal/types2/issues_test.go

@@ -552,6 +552,8 @@ func TestIssue44515(t *testing.T) {
 }
 
 func TestIssue43124(t *testing.T) {
+	testenv.MustHaveGoBuild(t)
+
 	// All involved packages have the same name (template). Error messages should
 	// disambiguate between text/template and html/template by printing the full
 	// path.

src/cmd/compile/internal/types2/self_test.go

@@ -6,6 +6,7 @@ package types2_test
 
 import (
 	"cmd/compile/internal/syntax"
+	"internal/testenv"
 	"path"
 	"path/filepath"
 	"runtime"
@@ -16,6 +17,8 @@ import (
 )
 
 func TestSelf(t *testing.T) {
+	testenv.MustHaveGoBuild(t) // The Go command is needed for the importer to determine the locations of stdlib .a files.
+
 	files, err := pkgFiles(".")
 	if err != nil {
 		t.Fatal(err)
@@ -29,6 +32,8 @@ func TestSelf(t *testing.T) {
 }
 
 func BenchmarkCheck(b *testing.B) {
+	testenv.MustHaveGoBuild(b) // The Go command is needed for the importer to determine the locations of stdlib .a files.
+
 	for _, p := range []string{
 		filepath.Join("src", "net", "http"),
 		filepath.Join("src", "go", "parser"),

src/cmd/compile/internal/types2/sizes_test.go

@@ -9,6 +9,7 @@ package types2_test
 import (
 	"cmd/compile/internal/syntax"
 	"cmd/compile/internal/types2"
+	"internal/testenv"
 	"testing"
 )
 
@@ -101,6 +102,8 @@ const _ = unsafe.Offsetof(struct{ x int64 }{}.x)
 
 // Issue #53884.
 func TestAtomicAlign(t *testing.T) {
+	testenv.MustHaveGoBuild(t) // The Go command is needed for the importer to determine the locations of stdlib .a files.
+
 	const src = `
 package main
 

src/cmd/compile/internal/types2/typestring_test.go

@@ -109,6 +109,7 @@ var dependentTestTypes = []testEntry{
 }
 
 func TestTypeString(t *testing.T) {
+	// The Go command is needed for the importer to determine the locations of stdlib .a files.
 	testenv.MustHaveGoBuild(t)
 
 	var tests []testEntry