From e6cde144164255e16640960fb7aaf67a183f8098 Mon Sep 17 00:00:00 2001
From: Reid Kleckner <rnk@google.com>
Date: Fri, 4 Aug 2017 21:52:25 +0000
Subject: [PATCH] [libclang] Determinize order of platform availability attrs

Previously this code was doing std::sort on IdentifierInfo pointers. Now
it sorts alphabetically by platform name.

This should de-flake clang/test/Index/availability.c, which was failing
non-deterministically for me.

llvm-svn: 310138
---
 clang/tools/libclang/CIndex.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 1815fdf5bd8e..ca21b6c6f68f 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -7303,7 +7303,8 @@ static void getCursorPlatformAvailabilityForDecl(
 
   std::sort(AvailabilityAttrs.begin(), AvailabilityAttrs.end(),
             [](AvailabilityAttr *LHS, AvailabilityAttr *RHS) {
-              return LHS->getPlatform() > RHS->getPlatform();
+              return LHS->getPlatform()->getName() <
+                     RHS->getPlatform()->getName();
             });
   ASTContext &Ctx = D->getASTContext();
   auto It = std::unique(