[GlobalISel] Fall back to SDISel for swifterror/swiftself attributes.

We don't currently support these, fall back until we do.

llvm-svn: 337994

2 files changed, 18 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
index 114c068749e..07de31bec66 100644
--- a/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
@@ -38,6 +38,9 @@ bool CallLowering::lowerCall(
     ArgInfo OrigArg{ArgRegs[i], Arg->getType(), ISD::ArgFlagsTy{},
                     i < NumFixedArgs};
     setArgFlags(OrigArg, i + AttributeList::FirstArgIndex, DL, CS);
+    // We don't currently support swifterror or swiftself args.
+    if (OrigArg.Flags.isSwiftError() || OrigArg.Flags.isSwiftSelf())
+      return false;
     OrigArgs.push_back(OrigArg);
     ++i;
   }
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index d4812202498..bafb7a05536 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1157,6 +1157,9 @@ bool IRTranslator::translateAlloca(const User &U,
                                    MachineIRBuilder &MIRBuilder) {
   auto &AI = cast<AllocaInst>(U);
 
+  if (AI.isSwiftError())
+    return false;
+
   if (AI.isStaticAlloca()) {
     unsigned Res = getOrCreateVReg(AI);
     int FI = getOrCreateFrameIndex(AI);
@@ -1574,6 +1577,18 @@ bool IRTranslator::runOnMachineFunction(MachineFunction &CurMF) {
         MRI->createGenericVirtualRegister(getLLTForType(*Arg.getType(), *DL)));
   }
 
+  // We don't currently support translating swifterror or swiftself functions.
+  for (auto &Arg : F.args()) {
+    if (Arg.hasSwiftErrorAttr() || Arg.hasSwiftSelfAttr()) {
+      OptimizationRemarkMissed R("gisel-irtranslator", "GISelFailure",
+                                 F.getSubprogram(), &F.getEntryBlock());
+      R << "unable to lower arguments due to swifterror/swiftself: "
+        << ore::NV("Prototype", F.getType());
+      reportTranslationError(*MF, *TPC, *ORE, R);
+      return false;
+    }
+  }
+
   if (!CLI->lowerFormalArguments(EntryBuilder, F, VRegArgs)) {
     OptimizationRemarkMissed R("gisel-irtranslator", "GISelFailure",
                                F.getSubprogram(), &F.getEntryBlock());