1 files changed, 15 insertions, 2 deletions
diff --git a/src/cmd/compile/internal/gc/parser.go b/src/cmd/compile/internal/gc/parser.go
index 941a0ec00f..19202674a6 100644
--- a/src/cmd/compile/internal/gc/parser.go
+++ b/src/cmd/compile/internal/gc/parser.go
@@ -15,14 +15,27 @@ package gc
 import (
 	"bufio"
 	"fmt"
+	"os"
 	"strconv"
 	"strings"
 )
 
 const trace = false // if set, parse tracing can be enabled with -x
 
-// parse_file parses a single Go source file.
-func parse_file(bin *bufio.Reader) {
+// oldParseFile parses a single Go source file.
+func oldParseFile(infile string) {
+	f, err := os.Open(infile)
+	if err != nil {
+		fmt.Printf("open %s: %v\n", infile, err)
+		errorexit()
+	}
+	defer f.Close()
+	bin := bufio.NewReader(f)
+
+	// Skip initial BOM if present.
+	if r, _, _ := bin.ReadRune(); r != BOM {
+		bin.UnreadRune()
+	}
 	newparser(bin, nil).file()
 }