analyzer: introduce namespace to avoid ODR clashes (PR 93307)

PR analyzer/93307 reports that in an LTO bootstrap, there are ODR
violations between:
- the "region" type:
    gcc/analyzer/region-model.h:792
  vs:
    gcc/sched-int.h:1443
- the "constraint" type:
    gcc/analyzer/constraint-manager.h:121
  vs:
    gcc/tree-ssa-structalias.c:533

This patches solves this clash by putting all of the analyzer names
within a namespace.  I chose "ana" as it is short (to save typing).
The analyzer selftests are moved from namespace "selftest" to
"ana::selftest".

There are various places where the namespace has to be closed
and reopened, to allow e.g. for specializations of templates
in the global namespace.

gcc/analyzer/ChangeLog:
	PR analyzer/93307
	* analysis-plan.h: Wrap everything namespace "ana".
	* analyzer-logging.cc: Likewise.
	* analyzer-logging.h: Likewise.
	* analyzer-pass.cc (pass_analyzer::execute): Update for "ana"
	namespace.
	* analyzer-selftests.cc: Wrap everything namespace "ana".
	* analyzer-selftests.h: Likewise.
	* analyzer.h: Likewise for forward decls of types.
	* call-string.h: Likewise.
	* checker-path.cc: Likewise.
	* checker-path.h: Likewise.
	* constraint-manager.cc: Likewise.
	* constraint-manager.h: Likewise.
	* diagnostic-manager.cc: Likewise.
	* diagnostic-manager.h: Likewise.
	* engine.cc: Likewise.
	* engine.h: Likewise.
	* exploded-graph.h: Likewise.
	* function-set.cc: Likewise.
	* function-set.h: Likewise.
	* pending-diagnostic.cc: Likewise.
	* pending-diagnostic.h: Likewise.
	* program-point.cc: Likewise.
	* program-point.h: Likewise.
	* program-state.cc: Likewise.
	* program-state.h: Likewise.
	* region-model.cc: Likewise.
	* region-model.h: Likewise.
	* sm-file.cc: Likewise.
	* sm-malloc.cc: Likewise.
	* sm-pattern-test.cc: Likewise.
	* sm-sensitive.cc: Likewise.
	* sm-signal.cc: Likewise.
	* sm-taint.cc: Likewise.
	* sm.cc: Likewise.
	* sm.h: Likewise.
	* state-purge.h: Likewise.
	* supergraph.cc: Likewise.
	* supergraph.h: Likewise.

gcc/ChangeLog:
	PR analyzer/93307
	* gdbinit.in (break-on-saved-diagnostic): Update for move of
	diagnostic_manager into "ana" namespace.
	* selftest-run-tests.c (selftest::run_tests): Update for move of
	selftest::run_analyzer_selftests to
	ana::selftest::run_analyzer_selftests.

1 files changed, 4 insertions, 0 deletions

diff --git a/gcc/analyzer/analyzer-logging.cc b/gcc/analyzer/analyzer-logging.cc
index 9a6b36e..bd82875 100644
--- a/gcc/analyzer/analyzer-logging.cc
+++ b/gcc/analyzer/analyzer-logging.cc
@@ -30,6 +30,8 @@ along with GCC; see the file COPYING3.  If not see
 
 #if ENABLE_ANALYZER
 
+namespace ana {
+
 /* Implementation of class logger.  */
 
 /* ctor for logger.  */
@@ -221,4 +223,6 @@ log_user::set_logger (logger *logger)
   m_logger = logger;
 }
 
+} // namespace ana
+
 #endif /* #if ENABLE_ANALYZER */