analyzer: fix clang warnings [PR112317]

No functional change intended.

gcc/analyzer/ChangeLog:
	PR analyzer/112317
	* access-diagram.cc (class x_aligned_x_ruler_widget): Eliminate
	unused field "m_col_widths".
	(access_diagram_impl::add_valid_vs_invalid_ruler): Update for
	above change.
	* region-model.cc
	(check_one_function_attr_null_terminated_string_arg): Remove
	unused variables "cd_unchecked", "strlen_sval", and
	"limited_sval".
	* region-model.h (region_model_context_decorator::warn): Add
	missing "override".

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

3 files changed, 9 insertions, 23 deletions

diff --git a/gcc/analyzer/access-diagram.cc b/gcc/analyzer/access-diagram.cc
index c7d190e..fb8c028 100644
--- a/gcc/analyzer/access-diagram.cc
+++ b/gcc/analyzer/access-diagram.cc
@@ -919,11 +919,9 @@ class x_aligned_x_ruler_widget : public leaf_widget
 {
 public:
   x_aligned_x_ruler_widget (const access_diagram_impl &dia_impl,
-			    const theme &theme,
-			    table_dimension_sizes &col_widths)
+			    const theme &theme)
   : m_dia_impl (dia_impl),
-    m_theme (theme),
-    m_col_widths (col_widths)
+    m_theme (theme)
   {
   }
 
@@ -973,7 +971,6 @@ private:
 
   const access_diagram_impl &m_dia_impl;
   const theme &m_theme;
-  table_dimension_sizes &m_col_widths;
   std::vector<label> m_labels;
 };
 
@@ -2361,7 +2358,7 @@ private:
     LOG_SCOPE (m_logger);
 
     x_aligned_x_ruler_widget *w
-      = new x_aligned_x_ruler_widget (*this, m_theme, *m_col_widths);
+      = new x_aligned_x_ruler_widget (*this, m_theme);
 
     access_range invalid_before_bits;
     if (m_op.maybe_get_invalid_before_bits (&invalid_before_bits))
diff --git a/gcc/analyzer/region-model.cc b/gcc/analyzer/region-model.cc
index 9479bcf..dc83440 100644
--- a/gcc/analyzer/region-model.cc
+++ b/gcc/analyzer/region-model.cc
@@ -1877,23 +1877,13 @@ check_one_function_attr_null_terminated_string_arg (const gcall *call,
 	 || access->mode == access_read_write)
 	&& access->sizarg != UINT_MAX)
       {
-	/* First, check for a null-terminated string *without*
-	   emitting warnings (via a null context), to get an
-	   svalue for the strlen of the buffer (possibly
-	   nullptr if there would be an issue).  */
-	call_details cd_unchecked (call, this, nullptr);
-	const svalue *strlen_sval
-	  = check_for_null_terminated_string_arg (cd_unchecked,
-						  arg_idx);
-
-	/* Get svalue for the size limit argument.  */
 	call_details cd_checked (call, this, ctxt);
 	const svalue *limit_sval
 	  = cd_checked.get_arg_svalue (access->sizarg);
 	const svalue *ptr_sval
 	  = cd_checked.get_arg_svalue (arg_idx);
 	/* Try reading all of the bytes expressed by the size param,
-	   but without checking (via a null context).  */
+	   but without emitting warnings (via a null context).  */
 	const svalue *limited_sval
 	  = read_bytes (deref_rvalue (ptr_sval, NULL_TREE, nullptr),
 			NULL_TREE,
@@ -1912,11 +1902,10 @@ check_one_function_attr_null_terminated_string_arg (const gcall *call,
 	  {
 	    /* Reading up to the truncation limit seems OK; repeat
 	       the read, but with checking enabled.  */
-	    const svalue *limited_sval
-	      = read_bytes (deref_rvalue (ptr_sval, NULL_TREE, ctxt),
-			    NULL_TREE,
-			    limit_sval,
-			    ctxt);
+	    read_bytes (deref_rvalue (ptr_sval, NULL_TREE, ctxt),
+			NULL_TREE,
+			limit_sval,
+			ctxt);
 	  }
 	return;
       }
diff --git a/gcc/analyzer/region-model.h b/gcc/analyzer/region-model.h
index 8bfb068..4d8480d 100644
--- a/gcc/analyzer/region-model.h
+++ b/gcc/analyzer/region-model.h
@@ -890,7 +890,7 @@ class region_model_context_decorator : public region_model_context
 {
  public:
   bool warn (std::unique_ptr<pending_diagnostic> d,
-	     const stmt_finder *custom_finder)
+	     const stmt_finder *custom_finder) override
   {
     if (m_inner)
       return m_inner->warn (std::move (d), custom_finder);