[committed] analyzer: fix missing bitmap_clear [PR98564]

[David Malcolm]

Fix verified using valgrind.
Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.
Pushed to master as r11-6512-gcffe6dd2ce358c2cb550c9fb3c57cec65eee1c93.

gcc/analyzer/ChangeLog:
	PR analyzer/98564
	* engine.cc (exploded_path::feasible_p): Add missing call to
	bitmap_clear.

gcc/testsuite/ChangeLog:
	PR analyzer/98564
	* gcc.dg/analyzer/pr98564.c: New test.
---
 gcc/analyzer/engine.cc                  | 1 +
 gcc/testsuite/gcc.dg/analyzer/pr98564.c | 6 ++++++
 2 files changed, 7 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/analyzer/pr98564.c

diff --git a/gcc/analyzer/engine.cc b/gcc/analyzer/engine.cc
index 3ea4524bd65..8bc9adf5ee6 100644
--- a/gcc/analyzer/engine.cc
+++ b/gcc/analyzer/engine.cc
@@ -3374,6 +3374,7 @@ exploded_path::feasible_p (logger *logger, feasibility_problem **out,
   LOG_SCOPE (logger);
 
   auto_sbitmap snodes_visited (eg->get_supergraph ().m_nodes.length ());
+  bitmap_clear (snodes_visited);
 
   /* Traverse the path, updating this model.  */
   region_model model (eng->get_model_manager ());
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr98564.c b/gcc/testsuite/gcc.dg/analyzer/pr98564.c
new file mode 100644
index 00000000000..74b1abec6bf
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/analyzer/pr98564.c
@@ -0,0 +1,6 @@
+void *calloc (__SIZE_TYPE__, __SIZE_TYPE__);
+
+void test_1 (void)
+{
+  int *p = calloc (0, 1); /* { dg-message "allocated here" } */
+} /* { dg-warning "leak of 'p'" } */
-- 
2.26.2