[gcc r13-4762] rs6000: Add Rust support to traceback table

[gcc r13-4762] rs6000: Add Rust support to traceback table

[Segher Boessenkool]

https://gcc.gnu.org/g:f80f540e394e87ac70349bad109bfc4b465c7c98

commit r13-4762-gf80f540e394e87ac70349bad109bfc4b465c7c98
Author: Segher Boessenkool <segher@kernel.crashing.org>
Date:   Sat Dec 17 20:48:54 2022 +0000

    rs6000: Add Rust support to traceback table
    
    Use 0 for the "lang" identifier for Rust, just like we do for all other
    source languages without assigned language code (0 means "C").
    
    Tested on powerpc64-linux.  Without this patch there are ICEs galore in
    the gm2 testsuite for 64-bit Linux targets, and with the ptch there are
    just a few FAILs.
    
    2022-12-17  Segher Boessenkool  <segher@kernel.crashing.org>
    
            * config/rs6000/rs6000-logue.cc (rs6000_output_function_epilogue):
            Handle GNU Rust for the tbtab lang field.

Diff:
---
 gcc/config/rs6000/rs6000-logue.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/config/rs6000/rs6000-logue.cc b/gcc/config/rs6000/rs6000-logue.cc
index 3621cb501c7..669a2583402 100644
--- a/gcc/config/rs6000/rs6000-logue.cc
+++ b/gcc/config/rs6000/rs6000-logue.cc
@@ -5350,6 +5350,7 @@ rs6000_output_function_epilogue (FILE *file)
 	  || ! strcmp (language_string, "GNU GIMPLE")
 	  || ! strcmp (language_string, "GNU Go")
 	  || ! strcmp (language_string, "GNU D")
+	  || ! strcmp (language_string, "GNU Rust")
 	  || ! strcmp (language_string, "libgccjit"))
 	i = 0;
       else if (! strcmp (language_string, "GNU F77")