[pushed] Objective-C/C++: Ensure sufficient setup for the preprocessor.

[Iain Sandoe <iains.gcc@gmail.com>]

This is a regression fix where non-trivial Objective-C parses would
ICE when given -save-temps (ICE in the lexer).

This is a short-term fix for stage-4.  ISTM that we should not really
be making use of these functions in lexing and hopefully in GCC-15
we can take a look at moving the functionality to a later phase.

Tested on i686, powerpc, x86_64 Darwin, x86_64 Linux, pushed to trunk,
thanks
Iain

--- 8< ---

The tokenizer makes use of functions that determine if identifiers
are interface or class names, and those functions need a hash map
to be set up.

This ensures that these are initialized before pre-process-only
jobs are run.

gcc/objc/ChangeLog:

	* objc-act.cc (objc_init): Initialize interface and class
	name hash maps before the preprocessor uses them.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
---
 gcc/objc/objc-act.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/gcc/objc/objc-act.cc b/gcc/objc/objc-act.cc
index 143134832ff..cec64c4bfbd 100644
--- a/gcc/objc/objc-act.cc
+++ b/gcc/objc/objc-act.cc
@@ -345,6 +345,11 @@ bool
 objc_init (void)
 {
   bool ok;
+
+  /* Set up stuff used by the preprocessor as well as FE parser.  */
+  interface_hash_init ();
+  hash_init ();
+
 #ifdef OBJCPLUS
   if (cxx_init () == false)
 #else
@@ -374,8 +379,6 @@ objc_init (void)
 
   /* Set up stuff used by FE parser and all runtimes.  */
   errbuf = XNEWVEC (char, 1024 * 10);
-  interface_hash_init ();
-  hash_init ();
   objc_encoding_init ();
   /* ... and then check flags and set-up for the selected runtime ... */
   if (flag_next_runtime && flag_objc_abi >= 2)
-- 
2.39.2 (Apple Git-143)