compiler: relocate ID encoding utilities to gofrontend

    
    Relocate the code that encodes/sanitizes identifiers to make them
    assembler-friendly, moving it from the back end to the front end; the
    decisions about when to encode an identifier and the calls to the
    encoding helpers now take place entirely in gofrontend.
    
    Reviewed-on: https://go-review.googlesource.com/33424

	* go-gcc.cc (char_needs_encoding): Remove.
	(needs_encoding, fetch_utf8_char, encode_id): Remove.
	(Gcc_backend::global_variable): Add asm_name parameter.  Don't
	compute asm_name here.
	(Gcc_backend::implicit_variable): Likewise.
	(Gcc_backend::implicit_variable_reference): Likewise.
	(Gcc_backend::immutable_struct): Likewise.
	(Gcc_backend::immutable_struct_reference): Likewise.
	* Make-lang.in (GO_OBJS): Add go/go-encode-id.o.

From-SVN: r242726

1 files changed, 30 insertions, 0 deletions

diff --git a/gcc/go/gofrontend/go-encode-id.h b/gcc/go/gofrontend/go-encode-id.h
new file mode 100644
index 0000000..b95d97d
--- /dev/null
+++ b/gcc/go/gofrontend/go-encode-id.h
@@ -0,0 +1,30 @@
+// go-encode-id.h -- Go identifier encoding utilities  -*- C++ -*-
+
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef GO_ENCODE_ID_H
+#define GO_ENCODE_ID_H
+
+#include "backend.h"
+
+// Given an identifier corresponding to a function or variable,
+// this helper returns TRUE if the identifier needs special
+// encoding to be used as an ASM name (symbol), FALSE if the name
+// is OK as is.
+extern bool
+go_id_needs_encoding(const std::string& str);
+
+// Encodes the specified identifier for ASM name safety, returning a
+// string with the encoded value.
+extern std::string
+go_encode_id(const std::string &id);
+
+// Returns the empty string if the specified name needs encoding,
+// otherwise invokes go_encode_id() on the name and returns the
+// result.
+extern std::string
+go_selectively_encode_id(const std::string &id);
+
+#endif // !defined(GO_ENCODE_ID_H)