vendor/clang/clang-trunk-r304460

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/CodeGen/CGCleanup.cpp b/lib/CodeGen/CGCleanup.cpp
index e8bcf0a3ac564..b5453bc11e305 100644
--- a/lib/CodeGen/CGCleanup.cpp
+++ b/lib/CodeGen/CGCleanup.cpp
@@ -448,6 +448,13 @@ void CodeGenFunction::PopCleanupBlocks(
     auto *Inst = dyn_cast_or_null<llvm::Instruction>(*ReloadedValue);
     if (!Inst)
       continue;
+
+    // Don't spill static allocas, they dominate all cleanups. These are created
+    // by binding a reference to a local variable or temporary.
+    auto *AI = dyn_cast<llvm::AllocaInst>(Inst);
+    if (AI && AI->isStaticAlloca())
+      continue;
+
     Address Tmp =
         CreateDefaultAlignTempAlloca(Inst->getType(), "tmp.exprcleanup");