[GMR] Continue my quest to remove linked datastructures from GMR, NFC.

This replaces the next-to-last std::map with a DenseMap. While DenseMap
doesn't yet make tons of sense (there are 32 bytes or so in the value
type), my next change will reduce the value type to a single pointer --
we only need a pointer and 3 bits, and that is exactly what we can have.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242956 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/IPA/GlobalsModRef.cpp b/lib/Analysis/IPA/GlobalsModRef.cpp
index cfefa0bd438807d2bcc1cb9d1ea90abfccf131c3..3e4b00e6e507bed601d0b001e49020f01c41dd92 100644 (file)
--- a/lib/Analysis/IPA/GlobalsModRef.cpp
+++ b/lib/Analysis/IPA/GlobalsModRef.cpp
@@ -101,7 +101,7 @@ class GlobalsModRef : public ModulePass, public AliasAnalysis {
 
   /// FunctionInfo - For each function, keep track of what globals are
   /// modified or read.
-  std::map<const Function *, FunctionRecord> FunctionInfo;
+  DenseMap<const Function *, FunctionRecord> FunctionInfo;
 
   /// Handle to clear this analysis on deletion of values.
   struct DeletionCallbackHandle final : CallbackVH {
@@ -227,8 +227,7 @@ private:
   /// getFunctionInfo - Return the function info for the function, or null if
   /// we don't have anything useful to say about it.
   FunctionRecord *getFunctionInfo(const Function *F) {
-    std::map<const Function *, FunctionRecord>::iterator I =
-        FunctionInfo.find(F);
+    auto I = FunctionInfo.find(F);
     if (I != FunctionInfo.end())
       return &I->second;
     return nullptr;