[gcc r12-8526] bootstrap/105551 - restore nvptx build

[gcc r12-8526] bootstrap/105551 - restore nvptx build

[Jakub Jelinek]

https://gcc.gnu.org/g:a6a0f3423f3053999c0eb6e7183319c1dca6455d

commit r12-8526-ga6a0f3423f3053999c0eb6e7183319c1dca6455d
Author: Richard Biener <rguenther@suse.de>
Date:   Wed May 11 10:47:34 2022 +0200

    bootstrap/105551 - restore nvptx build
    
    The following makes sure to disable var-tracking if only
    dwarf2-line debuginfo is present.
    
    2022-05-11  Richard Biener  <rguenther@suse.de>
    
            PR bootstrap/105551
            * opts.cc (finish_options): Also disable var-tracking if
            !DWARF2_DEBUGGING_INFO.
    
    (cherry picked from commit e7d9fdf5e0ee4c34a880139254340b4165016289)

Diff:
---
 gcc/opts.cc | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/gcc/opts.cc b/gcc/opts.cc
index c9badd241a0..3a89da2dd03 100644
--- a/gcc/opts.cc
+++ b/gcc/opts.cc
@@ -1334,11 +1334,15 @@ finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
 	      || opts->x_flag_selective_scheduling2));
 
   /* We know which debug output will be used so we can set flag_var_tracking
-     and flag_var_tracking_uninit if the user has not specified them.  Note
-     we have not yet initialized debug_hooks so we might uselessly run
-     var-tracking on targets without var_location debug hook support.  */
+     and flag_var_tracking_uninit if the user has not specified them.  */
   if (opts->x_debug_info_level < DINFO_LEVEL_NORMAL
-      || !dwarf_debuginfo_p (opts))
+      || !dwarf_debuginfo_p (opts)
+      /* We have not yet initialized debug hooks so match that to check
+	 whether we're only doing DWARF2_LINENO_DEBUGGING_INFO.  */
+#ifndef DWARF2_DEBUGGING_INFO
+      || true
+#endif
+     )
     {
       if ((opts_set->x_flag_var_tracking && opts->x_flag_var_tracking == 1)
 	  || (opts_set->x_flag_var_tracking_uninit