[bpf] allow direct and indirect calls
kernel verifier is becoming smarter and soon will support
direct and indirect function calls.
Remove obsolete error from BPF backend.
Make call to use PCRel_4 fixup.
'bpf to bpf' calls are distinguished from 'bpf to kernel' calls
by insn->src_reg == BPF_PSEUDO_CALL == 1 which is used as relocation
indicator similar to ld_imm64->src_reg == BPF_PSEUDO_MAP_FD == 1
The actual 'call' instruction remains the same for both
'bpf to kernel' and 'bpf to bpf' calls.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 318614
diff --git a/llvm/test/CodeGen/BPF/cc_ret.ll b/llvm/test/CodeGen/BPF/cc_ret.ll
index be198f5..73e3556 100644
--- a/llvm/test/CodeGen/BPF/cc_ret.ll
+++ b/llvm/test/CodeGen/BPF/cc_ret.ll
@@ -1,4 +1,4 @@
-; RUN: not llc < %s -march=bpfel | FileCheck %s
+; RUN: llc < %s -march=bpfel | FileCheck %s
define void @test() #0 {
entry: