diff --git a/llvm/lib/Target/ARM/ARMFastISel.cpp b/llvm/lib/Target/ARM/ARMFastISel.cpp
index 54aa355d4db0a..14e1160e70dae 100644
--- a/llvm/lib/Target/ARM/ARMFastISel.cpp
+++ b/llvm/lib/Target/ARM/ARMFastISel.cpp
@@ -2504,6 +2504,7 @@ bool ARMFastISel::SelectCall(const Instruction *I,
   // Set all unused physreg defs as dead.
   static_cast<MachineInstr *>(MIB)->setPhysRegsDeadExcept(UsedRegs, TRI);
 
+  diagnoseDontCall(*CI);
   return true;
 }
 
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
index ec95e86e4fe3d..2666342d0c7b9 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp
@@ -912,6 +912,8 @@ bool WebAssemblyFastISel::selectCall(const Instruction *I) {
 
   if (!IsVoid)
     updateValueMap(Call, ResultReg);
+
+  diagnoseDontCall(*Call);
   return true;
 }