Fix comment typos

When looking at PR113410, I found a comment typo and just searched for
the same typo elsewhere and found some typos in the comments which had
that typo as well.

2024-01-17  Jakub Jelinek  <jakub@redhat.com>

	* tree-into-ssa.cc (pass_build_ssa::gate): Fix comment typo,
	funcions -> functions, and use were instead of was.
	* gengtype.cc (dump_typekind): Fix comment typos, funcion -> function
	and guaranteee -> guarantee.
	* attribs.h (struct attr_access): Fix comment typo funcion -> function.

gcc/attribs.h

@@ -324,7 +324,7 @@ struct attr_access
      in TREE_VALUE and their positions in the argument list (stored
      in TREE_PURPOSE).  Each expression may be a PARM_DECL or some
      other DECL (for ordinary variables), or an EXPR for other
-     expressions (e.g., funcion calls).  */
+     expressions (e.g., function calls).  */
   tree size;
 
   /* The zero-based position of each of the formal function arguments.

gcc/gengtype.cc

@@ -4718,8 +4718,8 @@ write_roots (pair_p variables, bool emit_pch)
 }
 
 /* Prints not-as-ugly version of a typename of T to OF.  Trades the uniquness
-   guaranteee for somewhat increased readability.  If name conflicts do happen,
-   this funcion will have to be adjusted to be more like
+   guarantee for somewhat increased readability.  If name conflicts do happen,
+   this function will have to be adjusted to be more like
    output_mangled_typename.  */
 
 #define INDENT 2

gcc/tree-into-ssa.cc

@@ -2499,7 +2499,7 @@ public:
   /* opt_pass methods: */
   bool gate (function *fun) final override
     {
-      /* Do nothing for funcions that was produced already in SSA form.  */
+      /* Do nothing for functions that were produced already in SSA form.  */
       return !(fun->curr_properties & PROP_ssa);
     }