bpf: avoid possible use of uninitialized variable

Fix a maybe-uninitialized warning introduced in commit:
068baae1864 bpf: add preserve_field_info builtin

gcc/

	* config/bpf/bpf.cc (bpf_expand_builtin): Avoid use of uninitialized
	variable in error case.

diff --git a/gcc/config/bpf/bpf.cc b/gcc/config/bpf/bpf.cc
index 16af2412bf6b00314401460579b139ab62181420..51e469550151a4e3a71fd663af8621a73d77b83a 100644 (file)
--- a/gcc/config/bpf/bpf.cc
+++ b/gcc/config/bpf/bpf.cc
@@ -1254,11 +1254,14 @@ bpf_expand_builtin (tree exp, rtx target ATTRIBUTE_UNUSED,
       /* A resolved overloaded __builtin_preserve_field_info.  */
       tree src = CALL_EXPR_ARG (exp, 0);
       tree kind_tree = CALL_EXPR_ARG (exp, 1);
-      unsigned HOST_WIDE_INT kind_val;
+      unsigned HOST_WIDE_INT kind_val = 0;
       if (tree_fits_uhwi_p (kind_tree))
        kind_val = tree_to_uhwi (kind_tree);
       else
-       error ("invalid argument to built-in function");
+       {
+         error ("invalid argument to built-in function");
+         return expand_normal (error_mark_node);
+       }
 
       enum btf_core_reloc_kind kind = (enum btf_core_reloc_kind) kind_val;