Merge pull request #13135 from gottesmm/pr-339c783b678f40183e3a6a3b4df5d136ad82f035

Author: swift-ci

lib/SIL/SILInstructions.cpp

@@ -2107,8 +2107,18 @@ ConvertFunctionInst::create(SILDebugLocation DebugLoc, SILValue Operand,
   unsigned size =
     totalSizeToAlloc<swift::Operand>(1 + TypeDependentOperands.size());
   void *Buffer = Mod.allocateInst(size, alignof(ConvertFunctionInst));
-  return ::new (Buffer) ConvertFunctionInst(DebugLoc, Operand,
-                                            TypeDependentOperands, Ty);
+  auto *CFI = ::new (Buffer)
+      ConvertFunctionInst(DebugLoc, Operand, TypeDependentOperands, Ty);
+  // Make sure we are not performing ABI-incompatible conversions.
+  CanSILFunctionType opTI =
+      CFI->getOperand()->getType().castTo<SILFunctionType>();
+  (void)opTI;
+  CanSILFunctionType resTI =
+      CFI->getOperand()->getType().castTo<SILFunctionType>();
+  (void)resTI;
+  assert(opTI->isABICompatibleWith(resTI).isCompatible() &&
+         "Can not convert in between ABI incompatible function types");
+  return CFI;
 }
 
 bool KeyPathPatternComponent::isComputedSettablePropertyMutating() const {