[AsmPrinter] Destroy allocated DIEAbbrevs on teardown.

DIEAbbrev contains a SmallVector that can leak for overly large abbrevs. They
used to be owned by the DIE, but after the recent refactoring DWARFFile
allocates its own abbrevs.

Leak found by asan.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238418 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter/DwarfFile.cpp b/lib/CodeGen/AsmPrinter/DwarfFile.cpp
index cafaabb..1060366 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfFile.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfFile.cpp
@@ -20,7 +20,10 @@ namespace llvm {
 DwarfFile::DwarfFile(AsmPrinter *AP, StringRef Pref, BumpPtrAllocator &DA)
     : Asm(AP), StrPool(DA, *Asm, Pref) {}
 
-DwarfFile::~DwarfFile() {}
+DwarfFile::~DwarfFile() {
+  for (DIEAbbrev *Abbrev : Abbreviations)
+    Abbrev->~DIEAbbrev();
+}
 
 // Define a unique number for the abbreviation.
 //