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 --git a/gcc/value-query.h b/gcc/value-query.h
index 6387896..2d7bf8f 100644 (file)
--- 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.