Fix reverse-iteration buildbot.

A couple of instances of iterating over maps snuck in while the bot was
down; fix them to use maps with deterministic iteration.

llvm/lib/CodeGen/GlobalMerge.cpp

@@ -62,6 +62,7 @@
 
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
@@ -181,7 +182,7 @@ namespace {
     void collectUsedGlobalVariables(Module &M, StringRef Name);
 
     /// Keep track of the GlobalVariable that must not be merged away
-    SmallPtrSet<const GlobalVariable *, 16> MustKeepGlobalVariables;
+    SmallSetVector<const GlobalVariable *, 16> MustKeepGlobalVariables;
 
   public:
     static char ID;             // Pass identification, replacement for typeid.

llvm/lib/ProfileData/RawMemProfReader.cpp

@@ -310,7 +310,7 @@ Error RawMemProfReader::mapRawProfileToRecords() {
   // it that is part of some dynamic allocation context. The location is stored
   // as a pointer to a symbolized list of inline frames.
   using LocationPtr = const llvm::SmallVector<FrameId> *;
-  llvm::DenseMap<GlobalValue::GUID, llvm::SetVector<LocationPtr>>
+  llvm::MapVector<GlobalValue::GUID, llvm::SetVector<LocationPtr>>
       PerFunctionCallSites;
 
   // Convert the raw profile callstack data into memprof records. While doing so
@@ -378,7 +378,7 @@ Error RawMemProfReader::mapRawProfileToRecords() {
     // we insert a new entry for callsite data if we need to.
     auto Result = FunctionProfileData.insert({Id, IndexedMemProfRecord()});
     IndexedMemProfRecord &Record = Result.first->second;
-    for (LocationPtr Loc : I->getSecond()) {
+    for (LocationPtr Loc : I->second) {
       Record.CallSites.push_back(*Loc);
     }
   }

llvm/test/tools/llvm-profdata/memprof-inline.test

@@ -206,16 +206,6 @@ CHECK-NEXT:        LineOffset: 0
 CHECK-NEXT:        Column: 18
 CHECK-NEXT:        Inline: 0
 CHECK-NEXT:  -
-CHECK-NEXT:    FunctionGUID: 15822663052811949562
-CHECK-NEXT:    CallSites:
-CHECK-NEXT:    -
-CHECK-NEXT:      -
-CHECK-NEXT:        Function: 15822663052811949562
-CHECK-NEXT:        SymbolName: main
-CHECK-NEXT:        LineOffset: 1
-CHECK-NEXT:        Column: 3
-CHECK-NEXT:        Inline: 0
-CHECK-NEXT:  -
 CHECK-NEXT:    FunctionGUID: 16434608426314478903
 CHECK-NEXT:    CallSites:
 CHECK-NEXT:    -
@@ -225,3 +215,13 @@ CHECK-NEXT:        SymbolName: bar
 CHECK-NEXT:        LineOffset: 0
 CHECK-NEXT:        Column: 19
 CHECK-NEXT:        Inline: 0
+CHECK-NEXT:  -
+CHECK-NEXT:    FunctionGUID: 15822663052811949562
+CHECK-NEXT:    CallSites:
+CHECK-NEXT:    -
+CHECK-NEXT:      -
+CHECK-NEXT:        Function: 15822663052811949562
+CHECK-NEXT:        SymbolName: main
+CHECK-NEXT:        LineOffset: 1
+CHECK-NEXT:        Column: 3
+CHECK-NEXT:        Inline: 0