[bpf] error when unknown bpf helper is called
Emit error when BPF backend sees a call to a global function or to an external symbol.
The kernel verifier only allows calls to predefined helpers from bpf.h
which are defined in 'enum bpf_func_id'. Such calls in assembler must
look like 'call [1-9]+' where number matches bpf_func_id.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 292204
diff --git a/llvm/test/CodeGen/BPF/cc_ret.ll b/llvm/test/CodeGen/BPF/cc_ret.ll
index 7bd01ad..eab2a35 100644
--- a/llvm/test/CodeGen/BPF/cc_ret.ll
+++ b/llvm/test/CodeGen/BPF/cc_ret.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=bpfel | FileCheck %s
+; RUN: not llc < %s -march=bpfel | FileCheck %s
define void @test() #0 {
entry: