[Pass Builder] Allow Module Inliner for full LTO

Currently there is no way to enable the module inliner when
linking with full lto. This patch enables that option.

Differential Revision: https://reviews.llvm.org/D146805

Author: ibricchi

llvm/lib/Passes/PassBuilderPipelines.cpp

@@ -1708,11 +1708,17 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
   // valuable as the inliner doesn't currently care whether it is inlining an
   // invoke or a call.
   // Run the inliner now.
-  MPM.addPass(ModuleInlinerWrapperPass(
-      getInlineParamsFromOptLevel(Level),
-      /* MandatoryFirst */ true,
-      InlineContext{ThinOrFullLTOPhase::FullLTOPostLink,
-                    InlinePass::CGSCCInliner}));
+  if (EnableModuleInliner) {
+    MPM.addPass(ModuleInlinerPass(getInlineParamsFromOptLevel(Level),
+                                  UseInlineAdvisor,
+                                  ThinOrFullLTOPhase::FullLTOPostLink));
+  } else {
+    MPM.addPass(ModuleInlinerWrapperPass(
+        getInlineParamsFromOptLevel(Level),
+        /* MandatoryFirst */ true,
+        InlineContext{ThinOrFullLTOPhase::FullLTOPostLink,
+                      InlinePass::CGSCCInliner}));
+  }
 
   // Perform context disambiguation after inlining, since that would reduce the
   // amount of additional cloning required to distinguish the allocation