From 1b4137a7f902d9e67bad20c4d71fbf05c41c7855 Mon Sep 17 00:00:00 2001
From: Peter Collingbourne <peter@pcc.me.uk>
Date: Wed, 21 Dec 2016 23:03:45 +0000
Subject: IR: Function summary representation for type tests.

Each function summary has an attached list of type identifier GUIDs. The
idea is that during the regular LTO phase we would match these GUIDs to type
identifiers defined by the regular LTO module and store the resolutions in
a top-level "type identifier summary" (which will be implemented separately).

Differential Revision: https://reviews.llvm.org/D27967

llvm-svn: 290280
---
 llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')

diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index b719313..55f2af6 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -4847,6 +4847,7 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
   // "OriginalName" attachement.
   GlobalValueSummary *LastSeenSummary = nullptr;
   bool Combined = false;
+  std::vector<GlobalValue::GUID> PendingTypeTests;
 
   while (true) {
     BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
@@ -4912,7 +4913,8 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
           ArrayRef<uint64_t>(Record).slice(CallGraphEdgeStartIndex),
           IsOldProfileFormat, HasProfile);
       auto FS = llvm::make_unique<FunctionSummary>(
-          Flags, InstCount, std::move(Refs), std::move(Calls));
+          Flags, InstCount, std::move(Refs), std::move(Calls),
+          std::move(PendingTypeTests));
       auto GUID = getGUIDFromValueId(ValueID);
       FS->setModulePath(TheIndex.addModulePath(ModulePath, 0)->first());
       FS->setOriginalName(GUID.second);
@@ -4985,7 +4987,8 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
           IsOldProfileFormat, HasProfile);
       GlobalValue::GUID GUID = getGUIDFromValueId(ValueID).first;
       auto FS = llvm::make_unique<FunctionSummary>(
-          Flags, InstCount, std::move(Refs), std::move(Edges));
+          Flags, InstCount, std::move(Refs), std::move(Edges),
+          std::move(PendingTypeTests));
       LastSeenSummary = FS.get();
       FS->setModulePath(ModuleIdMap[ModuleId]);
       TheIndex.addGlobalValueSummary(GUID, std::move(FS));
@@ -5041,6 +5044,13 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
       LastSeenSummary->setOriginalName(OriginalName);
       // Reset the LastSeenSummary
       LastSeenSummary = nullptr;
+      break;
+    }
+    case bitc::FS_TYPE_TESTS: {
+      assert(PendingTypeTests.empty());
+      PendingTypeTests.insert(PendingTypeTests.end(), Record.begin(),
+                              Record.end());
+      break;
     }
     }
   }
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