[gcc r12-7490] Darwin: Fix a type mismatch warning for a non-GCC bootstrap compiler.

[Iain D Sandoe]

https://gcc.gnu.org/g:25587472ccd223c861fe77cfeca4ba33c3f6cd99

commit r12-7490-g25587472ccd223c861fe77cfeca4ba33c3f6cd99
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Fri Mar 4 12:39:03 2022 +0000

    Darwin: Fix a type mismatch warning for a non-GCC bootstrap compiler.
    
    DECL_MD_FUNCTION_CODE() returns an int, on one particular compiler the
    code in darwin_fold_builtin() triggers a warning.
    
    Fixed thus.
    
    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
    
    gcc/ChangeLog:
    
            * config/darwin.cc (darwin_fold_builtin): Make fcode an int to
            avoid a mismatch with DECL_MD_FUNCTION_CODE().

Diff:
---
 gcc/config/darwin.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/darwin.cc b/gcc/config/darwin.cc
index 783fe3cb443..f065a13d73d 100644
--- a/gcc/config/darwin.cc
+++ b/gcc/config/darwin.cc
@@ -3621,7 +3621,7 @@ tree
 darwin_fold_builtin (tree fndecl, int n_args, tree *argp,
 		     bool ARG_UNUSED (ignore))
 {
-  unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl);
+  int fcode = DECL_MD_FUNCTION_CODE (fndecl);
 
   if (fcode == darwin_builtin_cfstring)
     {