arm: Remove use of opts_set in arm_configure_build_target [PR100767]

The variable global_options_set is a reflection of which options have
been explicitly set from the command line in the structure
global_options.  But it doesn't describe the contents of a
cl_target_option.  cl_target_option is a set of options to apply and
once configured should represent a viable set of options without
needing to know which were explicitly set by the user.

Unfortunately arm_configure_build_target was incorrectly conflating
the two.  Fortunately, however, we do not really need to know this
since the various override_options functions should have sanitized the
target_options values before constructing a cl_target_option
structure.  It is safe, therefore, to simply drop this parameter to
arm_configure_build_target and rely on checking that various string
parameters are non-null before dereferencing them.

gcc:

	PR target/100767
	* config/arm/arm.c (arm_configure_build_target): Remove parameter
	opts_set, directly check opts parameters for being non-null.
	(arm_option_restore): Update call to arm_configure_build_target.
	(arm_option_override): Likewise.
	(arm_can_inline_p): Likewise.
	(arm_valid_target_attribute_tree): Likewise.
	* config/arm/arm-c.c (arm_pragma_target_parse): Likewise.
	* config/arm/arm-protos.h (arm_configure_build_target): Adjust
	prototype.

3 files changed, 12 insertions, 17 deletions

diff --git a/gcc/config/arm/arm-c.c b/gcc/config/arm/arm-c.c
index 7f97b84..ae2139c 100644
--- a/gcc/config/arm/arm-c.c
+++ b/gcc/config/arm/arm-c.c
@@ -408,8 +408,7 @@ arm_pragma_target_parse (tree args, tree pop_target)
        target_option_current_node, but not handle_pragma_target.  */
       target_option_current_node = cur_tree;
       arm_configure_build_target (&arm_active_target,
-				  TREE_TARGET_OPTION (cur_tree),
-				  &global_options_set, false);
+				  TREE_TARGET_OPTION (cur_tree), false);
     }
 
   /* Update macros if target_node changes. The global state will be restored
diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index ffccaa7..9b1f613 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -243,8 +243,7 @@ extern bool arm_change_mode_p (tree);
 extern tree arm_valid_target_attribute_tree (tree, struct gcc_options *,
 					     struct gcc_options *);
 extern void arm_configure_build_target (struct arm_build_target *,
-					struct cl_target_option *,
-					struct gcc_options *, bool);
+					struct cl_target_option *, bool);
 extern void arm_option_reconfigure_globals (void);
 extern void arm_options_perform_arch_sanity_checks (void);
 extern void arm_pr_long_calls (struct cpp_reader *);
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 9377aae..7b37e1b 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -3054,9 +3054,10 @@ arm_override_options_after_change (void)
 /* Implement TARGET_OPTION_RESTORE.  */
 static void
 arm_option_restore (struct gcc_options */* opts */,
-		    struct gcc_options *opts_set, struct cl_target_option *ptr)
+		    struct gcc_options */* opts_set */,
+		    struct cl_target_option *ptr)
 {
-  arm_configure_build_target (&arm_active_target, ptr, opts_set, false);
+  arm_configure_build_target (&arm_active_target, ptr, false);
 }
 
 /* Reset options between modes that the user has specified.  */
@@ -3179,7 +3180,6 @@ static sbitmap isa_quirkbits;
 void
 arm_configure_build_target (struct arm_build_target *target,
 			    struct cl_target_option *opts,
-			    struct gcc_options *opts_set,
 			    bool warn_compatible)
 {
   const cpu_option *arm_selected_tune = NULL;
@@ -3194,7 +3194,7 @@ arm_configure_build_target (struct arm_build_target *target,
   target->core_name = NULL;
   target->arch_name = NULL;
 
-  if (opts_set->x_arm_arch_string)
+  if (opts->x_arm_arch_string)
     {
       arm_selected_arch = arm_parse_arch_option_name (all_architectures,
 						      "-march",
@@ -3202,7 +3202,7 @@ arm_configure_build_target (struct arm_build_target *target,
       arch_opts = strchr (opts->x_arm_arch_string, '+');
     }
 
-  if (opts_set->x_arm_cpu_string)
+  if (opts->x_arm_cpu_string)
     {
       arm_selected_cpu = arm_parse_cpu_option_name (all_cores, "-mcpu",
 						    opts->x_arm_cpu_string);
@@ -3212,7 +3212,7 @@ arm_configure_build_target (struct arm_build_target *target,
 	 options for tuning.  */
     }
 
-  if (opts_set->x_arm_tune_string)
+  if (opts->x_arm_tune_string)
     {
       arm_selected_tune = arm_parse_cpu_option_name (all_cores, "-mtune",
 						     opts->x_arm_tune_string);
@@ -3476,8 +3476,7 @@ arm_option_override (void)
     }
 
   cl_target_option_save (&opts, &global_options, &global_options_set);
-  arm_configure_build_target (&arm_active_target, &opts, &global_options_set,
-			      true);
+  arm_configure_build_target (&arm_active_target, &opts, true);
 
 #ifdef SUBTARGET_OVERRIDE_OPTIONS
   SUBTARGET_OVERRIDE_OPTIONS;
@@ -32982,10 +32981,8 @@ arm_can_inline_p (tree caller, tree callee)
   caller_target.isa = sbitmap_alloc (isa_num_bits);
   callee_target.isa = sbitmap_alloc (isa_num_bits);
 
-  arm_configure_build_target (&caller_target, caller_opts, &global_options_set,
-			      false);
-  arm_configure_build_target (&callee_target, callee_opts, &global_options_set,
-			      false);
+  arm_configure_build_target (&caller_target, caller_opts, false);
+  arm_configure_build_target (&callee_target, callee_opts, false);
   if (!bitmap_subset_p (callee_target.isa, caller_target.isa))
     can_inline = false;
 
@@ -33121,7 +33118,7 @@ arm_valid_target_attribute_tree (tree args, struct gcc_options *opts,
     return NULL_TREE;
 
   cl_target_option_save (&cl_opts, opts, opts_set);
-  arm_configure_build_target (&arm_active_target, &cl_opts, opts_set, false);
+  arm_configure_build_target (&arm_active_target, &cl_opts, false);
   arm_option_check_internal (opts);
   /* Do any overrides, such as global options arch=xxx.
      We do this since arm_active_target was overridden.  */