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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/99122] [10/11 Regression] ICE in force_constant_size, at
 gimplify.c:733
Date: Thu, 18 Feb 2021 12:42:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99122

--- Comment #14 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Like with the following, which seems to work as far as inlining is concerne=
d,
but the latest Jakub's example ICEs when cloning for IPA-CP :-/  (I am also=
 not
sure if the predicate to identify VLAs is the best one).

--- a/gcc/tree-inline.c
+++ b/gcc/tree-inline.c
@@ -3418,6 +3418,9 @@ force_value_to_type (tree type, tree value)
      Still if we end up with truly mismatched types here, fall back
      to using a VIEW_CONVERT_EXPR or a literal zero to not leak invalid
      GIMPLE to the following passes.  */
+  if (TREE_CODE (value) =3D=3D WITH_SIZE_EXPR)
+    value =3D TREE_OPERAND (value, 0);
+=20=20
   if (!is_gimple_reg_type (TREE_TYPE (value))
           || TYPE_SIZE (type) =3D=3D TYPE_SIZE (TREE_TYPE (value)))
     return fold_build1 (VIEW_CONVERT_EXPR, type, value);
@@ -4017,6 +4020,10 @@ inline_forbidden_p (tree fndecl)
   wi.info =3D (void *) fndecl;
   wi.pset =3D &visited_nodes;

+  for (tree parm =3D DECL_ARGUMENTS (fndecl); parm; parm =3D DECL_CHAIN (p=
arm))
+    if (TREE_CODE (DECL_SIZE (parm)) !=3D INTEGER_CST)
+      return true;
+=20=20
   FOR_EACH_BB_FN (bb, fun)
     {=20
       gimple *ret;=