analyzer: introduce succeed_or_fail_call_info

This makes some followup code much cleaner.

gcc/analyzer/ChangeLog:
	* call-info.cc (success_call_info::get_desc): Delete.
	(failed_call_info::get_desc): Likewise.
	(succeed_or_fail_call_info::get_desc): New.
	* call-info.h (class succeed_or_fail_call_info): New.
	(class success_call_info): Convert to a subclass of
	succeed_or_fail_call_info.
	(class failed_call_info): Likewise.

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

2 files changed, 32 insertions, 23 deletions

diff --git a/gcc/analyzer/call-info.cc b/gcc/analyzer/call-info.cc
index ffdab73b165..7a1c4edfcae 100644
--- a/gcc/analyzer/call-info.cc
+++ b/gcc/analyzer/call-info.cc
@@ -141,24 +141,15 @@ call_info::call_info (const call_details &cd)
   gcc_assert (m_fndecl);
 }
 
-/* class success_call_info : public call_info.  */
-
-/* Implementation of call_info::get_desc vfunc for success_call_info.  */
-
-label_text
-success_call_info::get_desc (bool can_colorize) const
-{
-  return make_label_text (can_colorize, "when %qE succeeds", get_fndecl ());
-}
-
-/* class failed_call_info : public call_info.  */
-
-/* Implementation of call_info::get_desc vfunc for failed_call_info.  */
+/* class succeed_or_fail_call_info : public call_info.  */
 
 label_text
-failed_call_info::get_desc (bool can_colorize) const
+succeed_or_fail_call_info::get_desc (bool can_colorize) const
 {
-  return make_label_text (can_colorize, "when %qE fails", get_fndecl ());
+  if (m_success)
+    return make_label_text (can_colorize, "when %qE succeeds", get_fndecl ());
+  else
+    return make_label_text (can_colorize, "when %qE fails", get_fndecl ());
 }
 
 } // namespace ana
diff --git a/gcc/analyzer/call-info.h b/gcc/analyzer/call-info.h
index 4bb7dd7e198..2fd50776f0a 100644
--- a/gcc/analyzer/call-info.h
+++ b/gcc/analyzer/call-info.h
@@ -51,17 +51,36 @@ private:
 };
 
 /* Subclass of call_info for a "success" outcome of a call,
-   adding a "when `FNDECL' succeeds" message.
+   adding either a
+     "when `FNDECL' succeeds" message (when 'success' is true)
+   or a
+     "when `FNDECL' fails" message    (when 'success' is false).
    This is still abstract: the custom_edge_info::update_model vfunc
    must be implemented.  */
 
-class success_call_info : public call_info
+class succeed_or_fail_call_info : public call_info
 {
 public:
   label_text get_desc (bool can_colorize) const final override;
 
 protected:
-  success_call_info (const call_details &cd) : call_info (cd) {}
+  succeed_or_fail_call_info (const call_details &cd, bool success)
+   : call_info (cd), m_success (success) {}
+
+  bool m_success;
+};
+
+/* Subclass of call_info for a "success" outcome of a call,
+   adding a "when `FNDECL' succeeds" message.
+   This is still abstract: the custom_edge_info::update_model vfunc
+   must be implemented.  */
+
+class success_call_info : public succeed_or_fail_call_info
+{
+protected:
+  success_call_info (const call_details &cd)
+  : succeed_or_fail_call_info (cd, true)
+  {}
 };
 
 /* Subclass of call_info for a "failure" outcome of a call,
@@ -69,13 +88,12 @@ protected:
    This is still abstract: the custom_edge_info::update_model vfunc
    must be implemented.  */
 
-class failed_call_info : public call_info
+class failed_call_info : public succeed_or_fail_call_info
 {
-public:
-  label_text get_desc (bool can_colorize) const final override;
-
 protected:
-  failed_call_info (const call_details &cd) : call_info (cd) {}
+  failed_call_info (const call_details &cd)
+  : succeed_or_fail_call_info (cd, false)
+  {}
 };
 
 } // namespace ana