[Inliner] Don't skip inlining alwaysinline in optnone functions

Previously the NPM inliner would skip all potential inlines in an
optnone function, but alwaysinline callees should be inlined regardless
of optnone.

Fixes inline-optnone.ll under NPM.

Reviewed By: kazu

Differential Revision: https://reviews.llvm.org/D83021

llvm/lib/Transforms/IPO/Inliner.cpp

@@ -791,7 +791,9 @@ PreservedAnalyses InlinerPass::run(LazyCallGraph::SCC &InitialC,
     LazyCallGraph::Node &N = *CG.lookup(F);
     if (CG.lookupSCC(N) != C)
       continue;
-    if (F.hasOptNone()) {
+    if (!Calls[I].first->getCalledFunction()->hasFnAttribute(
+            Attribute::AlwaysInline) &&
+        F.hasOptNone()) {
       setInlineRemark(*Calls[I].first, "optnone attribute");
       continue;
     }

llvm/test/Transforms/Inline/inline-optnone.ll

@@ -1,4 +1,5 @@
 ; RUN: opt < %s -inline -S | FileCheck %s
+; RUN: opt < %s --passes=inline -S | FileCheck %s
 
 ; Test that functions with attribute optnone are not inlined.
 ; Also test that only functions with attribute alwaysinline are