--- wikisrc/users/maya/vax-gcc.mdwn	2019/08/29 13:01:34	1.3
+++ wikisrc/users/maya/vax-gcc.mdwn	2019/08/29 20:39:43	1.4
@@ -1,6 +1,6 @@
 # Various GCC/vax issues and invesigation #
 
-# libgomp crash with -O2 #
+## libgomp crash with -O2 ##
 Repro:
 
     #!/bin/sh
@@ -21,3 +21,31 @@ Asserts at emit-rtl.c:2310 gcc_assert (m
 NetBSD avoids it with a [local diff](5f534f20bc66738c05c442a8f20088f55335b653/external/gpl3/gcc/dist/libgcc/gthr-posix.h#L418) to reload.c/dse.c.  
 It looks like a real bug in vax_legitimate_address_p not handling some addressing modes.  
 The code to handle offset(reg)[index] might be off: it doesn't like if neither xfoo0, xfoo1 are constant.
+
+## unrecognizable insn with any optimization ##
+
+Repro:
+
+#!/bin/sh
+
+    cat << EOF > decl.ii
+    struct a {
+      long long *b() const;
+    };
+    template <typename> class d : a {
+    public:
+      template <typename e> d(e);
+      long long f() const;
+    };
+    template <typename c> long long d<c>::f() const {
+      int g;
+      return b()[g];
+    }
+    int h;
+    bool i() {
+      d<int> j(h);
+      return j.f();
+    }
+    EOF
+    vax--netbsdelf-g++ -O2 -c decl.ii
+