Revert "[CodeGen] Disable aggressive structor optimizations at -O0"

It breaks the sanitizer build
<http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-autoconf/builds/23739>

This reverts commit r332228.

llvm-svn: 332232

1 files changed, 6 insertions, 10 deletions

diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
index 89a05769e03..e7d4d8ac295 100644
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -3630,16 +3630,12 @@ static StructorCodegen getCodegenToUse(CodeGenModule &CGM,
   }
   llvm::GlobalValue::LinkageTypes Linkage = CGM.getFunctionLinkage(AliasDecl);
 
-  // Only use RAUW in optimized code, as it makes the complete structor symbol
-  // disappear completely, which degrades debugging experience.
-  if (CGM.getCodeGenOpts().OptimizationLevel > 0) {
-    if (llvm::GlobalValue::isDiscardableIfUnused(Linkage))
-      return StructorCodegen::RAUW;
-
-    // FIXME: Should we allow available_externally aliases?
-    if (!llvm::GlobalAlias::isValidLinkage(Linkage))
-      return StructorCodegen::RAUW;
-  }
+  if (llvm::GlobalValue::isDiscardableIfUnused(Linkage))
+    return StructorCodegen::RAUW;
+
+  // FIXME: Should we allow available_externally aliases?
+  if (!llvm::GlobalAlias::isValidLinkage(Linkage))
+    return StructorCodegen::RAUW;
 
   if (llvm::GlobalValue::isWeakForLinker(Linkage)) {
     // Only ELF and wasm support COMDATs with arbitrary names (C5/D5).