From e87868b7e9178cc404dd9c475fdf56de5d4fb3c2 Mon Sep 17 00:00:00 2001
From: Teresa Johnson <tejohnson@google.com>
Date: Thu, 28 Jun 2018 20:07:47 +0000
Subject: [PATCH] [ThinLTO] Port InlinerFunctionImportStats handling to new PM

Summary:
The InlinerFunctionImportStats will collect and dump stats regarding how
many function inlined into the module were imported by ThinLTO.

Reviewers: wmi, dexonsmith

Subscribers: mehdi_amini, inglorion, llvm-commits, eraman

Differential Revision: https://reviews.llvm.org/D48729

llvm-svn: 335914
---
 llvm/include/llvm/Transforms/IPO/Inliner.h  |  5 +++++
 llvm/lib/Transforms/IPO/Inliner.cpp         | 18 ++++++++++++++++++
 llvm/test/Transforms/Inline/inline_stats.ll |  5 +++++
 3 files changed, 28 insertions(+)

diff --git a/llvm/include/llvm/Transforms/IPO/Inliner.h b/llvm/include/llvm/Transforms/IPO/Inliner.h
index eda8cf4..610e450 100644
--- a/llvm/include/llvm/Transforms/IPO/Inliner.h
+++ b/llvm/include/llvm/Transforms/IPO/Inliner.h
@@ -96,12 +96,17 @@ class InlinerPass : public PassInfoMixin<InlinerPass> {
 public:
   InlinerPass(InlineParams Params = getInlineParams())
       : Params(std::move(Params)) {}
+  ~InlinerPass();
+  InlinerPass(InlinerPass &&Arg)
+      : Params(std::move(Arg.Params)),
+        ImportedFunctionsStats(std::move(Arg.ImportedFunctionsStats)) {}
 
   PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
                         LazyCallGraph &CG, CGSCCUpdateResult &UR);
 
 private:
   InlineParams Params;
+  std::unique_ptr<ImportedFunctionsInliningStatistics> ImportedFunctionsStats;
 };
 
 } // end namespace llvm
diff --git a/llvm/lib/Transforms/IPO/Inliner.cpp b/llvm/lib/Transforms/IPO/Inliner.cpp
index 1698e0b..3da0c2e 100644
--- a/llvm/lib/Transforms/IPO/Inliner.cpp
+++ b/llvm/lib/Transforms/IPO/Inliner.cpp
@@ -793,6 +793,14 @@ bool LegacyInlinerBase::removeDeadFunctions(CallGraph &CG,
   return true;
 }
 
+InlinerPass::~InlinerPass() {
+  if (ImportedFunctionsStats) {
+    assert(InlinerFunctionImportStats != InlinerFunctionImportStatsOpts::No);
+    ImportedFunctionsStats->dump(InlinerFunctionImportStats ==
+                                 InlinerFunctionImportStatsOpts::Verbose);
+  }
+}
+
 PreservedAnalyses InlinerPass::run(LazyCallGraph::SCC &InitialC,
                                    CGSCCAnalysisManager &AM, LazyCallGraph &CG,
                                    CGSCCUpdateResult &UR) {
@@ -804,6 +812,13 @@ PreservedAnalyses InlinerPass::run(LazyCallGraph::SCC &InitialC,
   Module &M = *InitialC.begin()->getFunction().getParent();
   ProfileSummaryInfo *PSI = MAM.getCachedResult<ProfileSummaryAnalysis>(M);
 
+  if (!ImportedFunctionsStats &&
+      InlinerFunctionImportStats != InlinerFunctionImportStatsOpts::No) {
+    ImportedFunctionsStats =
+        llvm::make_unique<ImportedFunctionsInliningStatistics>();
+    ImportedFunctionsStats->setModuleInfo(M);
+  }
+
   // We use a single common worklist for calls across the entire SCC. We
   // process these in-order and append new calls introduced during inlining to
   // the end.
@@ -1009,6 +1024,9 @@ PreservedAnalyses InlinerPass::run(LazyCallGraph::SCC &InitialC,
               Calls.push_back({CS, NewHistoryID});
       }
 
+      if (InlinerFunctionImportStats != InlinerFunctionImportStatsOpts::No)
+        ImportedFunctionsStats->recordInline(F, Callee);
+
       // Merge the attributes based on the inlining.
       AttributeFuncs::mergeAttributesForInlining(F, Callee);
 
diff --git a/llvm/test/Transforms/Inline/inline_stats.ll b/llvm/test/Transforms/Inline/inline_stats.ll
index bc005b6a..40d6cb3 100644
--- a/llvm/test/Transforms/Inline/inline_stats.ll
+++ b/llvm/test/Transforms/Inline/inline_stats.ll
@@ -1,6 +1,11 @@
+; First with legacy PM
 ; RUN: opt -S -inline -inliner-function-import-stats=basic < %s 2>&1 | FileCheck %s -check-prefix=CHECK-BASIC -check-prefix=CHECK
 ; RUN: opt -S -inline -inliner-function-import-stats=verbose < %s 2>&1 | FileCheck %s -check-prefix="CHECK-VERBOSE" -check-prefix=CHECK
 
+; Do again with new PM
+; RUN: opt -S -passes=inline -inliner-function-import-stats=basic < %s 2>&1 | FileCheck %s -check-prefix=CHECK-BASIC -check-prefix=CHECK
+; RUN: opt -S -passes=inline -inliner-function-import-stats=verbose < %s 2>&1 | FileCheck %s -check-prefix="CHECK-VERBOSE" -check-prefix=CHECK
+
 ; CHECK: ------- Dumping inliner stats for [<stdin>] -------
 ; CHECK-BASIC-NOT: -- List of inlined functions:
 ; CHECK-BASIC-NOT: -- Inlined not imported function
-- 
2.7.4