[gcc r13-6124] Support get_range_query with a nullptr argument

[Andrew Pinski]

https://gcc.gnu.org/g:175d528595c3a8bdf75086d4e13844b645f715b0

commit r13-6124-g175d528595c3a8bdf75086d4e13844b645f715b0
Author: Andrew Pinski <apinski@marvell.com>
Date:   Fri Feb 17 16:45:43 2023 +0000

    Support get_range_query with a nullptr argument
    
    get_range_query didn't support a nullptr argument
    before and would crash.
    See also the thread at
    https://inbox.sourceware.org/gcc/4f6718af-e17a-41ef-a886-f45e4ac3d7a4@redhat.com/T/
    
    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.
    
    gcc/ChangeLog:
    
            * value-query.h (get_range_query): Return the global ranges
            for a nullptr func.

Diff:
---
 gcc/value-query.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/value-query.h b/gcc/value-query.h
index 63878968118..2d7bf8fcf33 100644
--- a/gcc/value-query.h
+++ b/gcc/value-query.h
@@ -140,7 +140,7 @@ get_global_range_query ()
 ATTRIBUTE_RETURNS_NONNULL inline range_query *
 get_range_query (const struct function *fun)
 {
-  return fun->x_range_query ? fun->x_range_query : &global_ranges;
+  return (fun && fun->x_range_query) ? fun->x_range_query : &global_ranges;
 }
 
 // Query the global range of NAME in function F.  Default to cfun.