From 890783b5e028a061bb51a4a978e8114b55073932 Mon Sep 17 00:00:00 2001
From: Haojian Wu <hokein@google.com>
Date: Wed, 25 Oct 2017 08:25:25 +0000
Subject: [PATCH] [clang-rename] Fix and enable the failing
 TemplatedClassFunction test.

Reviewers: ioeric

Reviewed By: ioeric

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D39241

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@316561 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../Refactoring/Rename/USRFindingAction.cpp   | 20 +++++++++++++++++++
 test/clang-rename/TemplatedClassFunction.cpp  | 17 ++++++++++------
 2 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/lib/Tooling/Refactoring/Rename/USRFindingAction.cpp b/lib/Tooling/Refactoring/Rename/USRFindingAction.cpp
index 0c746bbbcb..40b70d8a05 100644
--- a/lib/Tooling/Refactoring/Rename/USRFindingAction.cpp
+++ b/lib/Tooling/Refactoring/Rename/USRFindingAction.cpp
@@ -73,6 +73,7 @@ public:
         if (checkIfOverriddenFunctionAscends(OverriddenMethod))
           USRSet.insert(getUSRForDecl(OverriddenMethod));
       }
+      addUSRsOfInstantiatedMethods(MethodDecl);
     } else if (const auto *RecordDecl = dyn_cast<CXXRecordDecl>(FoundDecl)) {
       handleCXXRecordDecl(RecordDecl);
     } else if (const auto *TemplateDecl =
@@ -84,9 +85,13 @@ public:
     return std::vector<std::string>(USRSet.begin(), USRSet.end());
   }
 
+  bool shouldVisitTemplateInstantiations() const { return true; }
+
   bool VisitCXXMethodDecl(const CXXMethodDecl *MethodDecl) {
     if (MethodDecl->isVirtual())
       OverriddenMethods.push_back(MethodDecl);
+    if (MethodDecl->getInstantiatedFromMemberFunction())
+      InstantiatedMethods.push_back(MethodDecl);
     return true;
   }
 
@@ -137,6 +142,20 @@ private:
       addUSRsOfOverridenFunctions(OverriddenMethod);
   }
 
+  void addUSRsOfInstantiatedMethods(const CXXMethodDecl *MethodDecl) {
+    // For renaming a class template method, all references of the instantiated
+    // member methods should be renamed too, so add USRs of the instantiated
+    // methods to the USR set.
+    USRSet.insert(getUSRForDecl(MethodDecl));
+    if (const auto *FT = MethodDecl->getInstantiatedFromMemberFunction())
+      USRSet.insert(getUSRForDecl(FT));
+    for (const auto *Method : InstantiatedMethods) {
+      if (USRSet.find(getUSRForDecl(
+              Method->getInstantiatedFromMemberFunction())) != USRSet.end())
+        USRSet.insert(getUSRForDecl(Method));
+    }
+  }
+
   bool checkIfOverriddenFunctionAscends(const CXXMethodDecl *MethodDecl) {
     for (const auto &OverriddenMethod : MethodDecl->overridden_methods()) {
       if (USRSet.find(getUSRForDecl(OverriddenMethod)) != USRSet.end())
@@ -150,6 +169,7 @@ private:
   ASTContext &Context;
   std::set<std::string> USRSet;
   std::vector<const CXXMethodDecl *> OverriddenMethods;
+  std::vector<const CXXMethodDecl *> InstantiatedMethods;
   std::vector<const ClassTemplatePartialSpecializationDecl *> PartialSpecs;
 };
 } // namespace
diff --git a/test/clang-rename/TemplatedClassFunction.cpp b/test/clang-rename/TemplatedClassFunction.cpp
index 1f5b0b52ba..d7f21e0847 100644
--- a/test/clang-rename/TemplatedClassFunction.cpp
+++ b/test/clang-rename/TemplatedClassFunction.cpp
@@ -6,17 +6,22 @@ public:
 
 int main(int argc, char **argv) {
   A<int> a;
-  a.foo();   /* Test 2 */     // CHECK: a.bar()   /* Test 2 */
+  A<double> b;
+  A<float> c;
+  a.foo();   /* Test 2 */     // CHECK: a.bar();   /* Test 2 */
+  b.foo();   /* Test 3 */     // CHECK: b.bar();   /* Test 3 */
+  c.foo();   /* Test 4 */     // CHECK: c.bar();   /* Test 4 */
   return 0;
 }
 
 // Test 1.
-// RUN: clang-refactor rename -offset=48 -new-name=bar %s -- | sed 's,//.*,,' | FileCheck %s
+// RUN: clang-rename -offset=48 -new-name=bar %s -- | sed 's,//.*,,' | FileCheck %s
 // Test 2.
-// RUN: clang-refactor rename -offset=162 -new-name=bar %s -- | sed 's,//.*,,' | FileCheck %s
-//
-// Currently unsupported test.
-// XFAIL: *
+// RUN: clang-rename -offset=191 -new-name=bar %s -- | sed 's,//.*,,' | FileCheck %s
+// Test 3.
+// RUN: clang-rename -offset=255 -new-name=bar %s -- | sed 's,//.*,,' | FileCheck %s
+// Test 4.
+// RUN: clang-rename -offset=319 -new-name=bar %s -- | sed 's,//.*,,' | FileCheck %s
 
 // To find offsets after modifying the file, use:
 //   grep -Ubo 'foo.*' <file>
-- 
2.40.0