From: Eric Liu <ioeric@google.com>
Date: Mon, 9 Jul 2018 19:02:41 +0000 (+0000)
Subject: [Index] Ignore noop #undef's when handling macro occurrences.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f983ca81222092615a93802c6820e9a46b5b9ac2;p=clang

[Index] Ignore noop #undef's when handling macro occurrences.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@336584 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Index/IndexingAction.cpp b/lib/Index/IndexingAction.cpp
index b8faf7075e..16f6c21745 100644
--- a/lib/Index/IndexingAction.cpp
+++ b/lib/Index/IndexingAction.cpp
@@ -98,6 +98,8 @@ public:
 
   void MacroUndefined(const Token &MacroNameTok, const MacroDefinition &MD,
                       const MacroDirective *Undef) override {
+    if (!MD.getMacroInfo())  // Ignore noop #undef.
+      return;
     IndexCtx->handleMacroUndefined(*MacroNameTok.getIdentifierInfo(),
                                    MacroNameTok.getLocation(),
                                    *MD.getMacroInfo());