diff options
Diffstat (limited to 'lib/Target/BPF/BPFISelLowering.cpp')
| -rw-r--r-- | lib/Target/BPF/BPFISelLowering.cpp | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/lib/Target/BPF/BPFISelLowering.cpp b/lib/Target/BPF/BPFISelLowering.cpp index cca3492a1992..b9b3dff95c0a 100644 --- a/lib/Target/BPF/BPFISelLowering.cpp +++ b/lib/Target/BPF/BPFISelLowering.cpp @@ -33,7 +33,7 @@ using namespace llvm; #define DEBUG_TYPE "bpf-lower" -static void fail(const SDLoc &DL, SelectionDAG &DAG, const char *Msg) { +static void fail(const SDLoc &DL, SelectionDAG &DAG, const Twine &Msg) { MachineFunction &MF = DAG.getMachineFunction(); DAG.getContext()->diagnose( DiagnosticInfoUnsupported(*MF.getFunction(), Msg, DL.getDebugLoc())); @@ -306,11 +306,23 @@ SDValue BPFTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, // If the callee is a GlobalAddress node (quite common, every direct call is) // turn it into a TargetGlobalAddress node so that legalize doesn't hack it. // Likewise ExternalSymbol -> TargetExternalSymbol. - if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) + if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { + auto GV = G->getGlobal(); + fail(CLI.DL, DAG, + "A call to global function '" + StringRef(GV->getName()) + + "' is not supported. " + + (GV->isDeclaration() ? + "Only calls to predefined BPF helpers are allowed." : + "Please use __attribute__((always_inline) to make sure" + " this function is inlined.")); Callee = DAG.getTargetGlobalAddress(G->getGlobal(), CLI.DL, PtrVT, G->getOffset(), 0); - else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee)) + } else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee)) { Callee = DAG.getTargetExternalSymbol(E->getSymbol(), PtrVT, 0); + fail(CLI.DL, DAG, Twine("A call to built-in function '" + + StringRef(E->getSymbol()) + + "' is not supported.")); + } // Returns a chain & a flag for retval copy to use. SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); |