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[committed] analyzer: implement region_model::get_representative_path_var for labels

Message ID 20201027135804.1709867-1-dmalcolm@redhat.com
State New
Headers show
Series [committed] analyzer: implement region_model::get_representative_path_var for labels | expand

Commit Message

David Malcolm Oct. 27, 2020, 1:58 p.m. UTC 
This fixes an ICE seen e.g. with gcc.dg/analyzer/data-model-16.c when
enabling -fdump-analyzer.

Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.
Pushed to master as 9e78634c74c540cad6a2ca447af0d5df1ac4c60b.

gcc/analyzer/ChangeLog:
	* region-model.cc (region_model::get_representative_path_var):
	Implement case RK_LABEL.
	* region-model.h (label_region::get_label): New accessor.
---
 gcc/analyzer/region-model.cc | 5 ++++-
 gcc/analyzer/region-model.h  | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/gcc/analyzer/region-model.cc b/gcc/analyzer/region-model.cc
index 06c0c8668ac..9050b4424f8 100644
--- a/gcc/analyzer/region-model.cc
+++ b/gcc/analyzer/region-model.cc
@@ -2192,7 +2192,10 @@  region_model::get_representative_path_var (const region *reg,
 	return path_var (function_reg->get_fndecl (), 0);
       }
     case RK_LABEL:
-      gcc_unreachable (); // TODO
+      {
+	const label_region *label_reg = as_a <const label_region *> (reg);
+	return path_var (label_reg->get_label (), 0);
+      }
 
     case RK_SYMBOLIC:
       {
diff --git a/gcc/analyzer/region-model.h b/gcc/analyzer/region-model.h
index 5ad4a492f4f..3298d05ffda 100644
--- a/gcc/analyzer/region-model.h
+++ b/gcc/analyzer/region-model.h
@@ -1694,6 +1694,8 @@  public:
   void dump_to_pp (pretty_printer *pp, bool simple) const FINAL OVERRIDE;
   enum region_kind get_kind () const FINAL OVERRIDE { return RK_LABEL; }
 
+  tree get_label () const { return m_label; }
+
 private:
   tree m_label;
 };