Ensure that we don't miscodegen if vlas creap into the top of the for.
This will allow us to generate break and continue even if vlas are
involved without worry that we'll silently generate bad code.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64028 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjC.cpp b/lib/CodeGen/CGObjC.cpp
index d62cfdc..a116316 100644
--- a/lib/CodeGen/CGObjC.cpp
+++ b/lib/CodeGen/CGObjC.cpp
@@ -446,6 +446,10 @@
llvm::BasicBlock *LoopStart = createBasicBlock("loopstart");
EmitBlock(LoopStart);
+ // We want to ensure there are no vlas between here and when we
+ // push the break and continue context below.
+ llvm::Value *saveStackDepth = StackDepth;
+
llvm::Value *CounterPtr = CreateTempAlloca(UnsignedLongLTy, "counter.ptr");
Builder.CreateStore(Zero, CounterPtr);
@@ -515,6 +519,8 @@
llvm::BasicBlock *LoopEnd = createBasicBlock("loopend");
llvm::BasicBlock *AfterBody = createBasicBlock("afterbody");
+ assert (StackDepth == saveStackDepth && "vla unhandled in for");
+
BreakContinuePush(LoopEnd, AfterBody);
EmitStmt(S.getBody());