[GlobalISel] Use ImmutableCallSite instead of templates. NFC.

ImmutableCallSite abstracts away CallInst and InvokeInst. Use it!

llvm-svn: 297426
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 1e8f6c2..b8bb71d 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -749,7 +749,7 @@
       Args.push_back(getOrCreateVReg(*Arg));
 
     MF->getFrameInfo().setHasCalls(true);
-    return CLI->lowerCall(MIRBuilder, CI, Res, Args, [&]() {
+    return CLI->lowerCall(MIRBuilder, &CI, Res, Args, [&]() {
       return getOrCreateVReg(*CI.getCalledValue());
     });
   }
@@ -815,7 +815,7 @@
   for (auto &Arg: I.arg_operands())
     Args.push_back(getOrCreateVReg(*Arg));
 
-  if (!CLI->lowerCall(MIRBuilder, I, Res, Args,
+  if (!CLI->lowerCall(MIRBuilder, &I, Res, Args,
                       [&]() { return getOrCreateVReg(*I.getCalledValue()); }))
     return false;