analyzer: fix ICE converting float to int [PR96699]

gcc/analyzer/ChangeLog:
	PR analyzer/96699
	* region-model-manager.cc
	(region_model_manager::get_or_create_cast): Use FIX_TRUNC_EXPR for
	casting from REAL_TYPE to INTEGER_TYPE.

gcc/testsuite/ChangeLog:
	PR analyzer/96699
	* gcc.dg/analyzer/pr96699.c: New test.

2 files changed, 18 insertions, 0 deletions

diff --git a/gcc/analyzer/region-model-manager.cc b/gcc/analyzer/region-model-manager.cc
index 4faeaa5..0792574 100644
--- a/gcc/analyzer/region-model-manager.cc
+++ b/gcc/analyzer/region-model-manager.cc
@@ -396,6 +396,11 @@ region_model_manager::get_or_create_unaryop (tree type, enum tree_code op,
 const svalue *
 region_model_manager::get_or_create_cast (tree type, const svalue *arg)
 {
+  gcc_assert (type);
+  if (arg->get_type ())
+    if (TREE_CODE (type) == INTEGER_TYPE
+	&& TREE_CODE (arg->get_type ()) == REAL_TYPE)
+      return get_or_create_unaryop (type, FIX_TRUNC_EXPR, arg);
   return get_or_create_unaryop (type, NOP_EXPR, arg);
 }
 
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr96699.c b/gcc/testsuite/gcc.dg/analyzer/pr96699.c
new file mode 100644
index 0000000..c68e45a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/analyzer/pr96699.c
@@ -0,0 +1,13 @@
+struct qi {
+  union {
+    int hj;
+    float sl;
+  };
+};
+
+void
+i2 (struct qi *la)
+{
+  if (la->hj == 0)
+    la->sl = 0.0f;
+}