Fix memory leak in Preprocessor where MacroInfo objects in the MICache wouldn't have their

associated SmallVectors get deallocated.

llvm-svn: 105658

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/lib/Lex/Preprocessor.cpp b/clang/lib/Lex/Preprocessor.cpp
index ce6d9ab5c05..c20ecef47bd 100644
--- a/clang/lib/Lex/Preprocessor.cpp
+++ b/clang/lib/Lex/Preprocessor.cpp
@@ -113,6 +113,14 @@ Preprocessor::~Preprocessor() {
     I->second->Destroy(BP);
     I->first->setHasMacroDefinition(false);
   }
+  for (std::vector<MacroInfo*>::iterator I = MICache.begin(),
+                                         E = MICache.end(); I != E; ++I) {
+    // We don't need to free the MacroInfo objects directly.  These
+    // will be released when the BumpPtrAllocator 'BP' object gets
+    // destroyed.  We still need to run the dtor, however, to free
+    // memory alocated by MacroInfo.
+    (*I)->Destroy(BP);
+  }
 
   // Free any cached macro expanders.
   for (unsigned i = 0, e = NumCachedTokenLexers; i != e; ++i)