Fix a stack overflow in the assembler when checking that GEPs must be over sized types.

We failed to use a marking set to properly handle recursive types, which caused use
to recurse infinitely and eventually overflow the stack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231760 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/test/Assembler/unsized-recursive-type.ll b/test/Assembler/unsized-recursive-type.ll
new file mode 100644
index 00000000000..b6d93fa19fe
--- /dev/null
+++ b/test/Assembler/unsized-recursive-type.ll
@@ -0,0 +1,9 @@
+; RUN: not llvm-as < %s 2>&1 | FileCheck %s
+
+; CHECK: base element of getelementptr must be sized
+
+%myTy = type { %myTy }
+define void @foo(%myTy* %p){
+  %0 = getelementptr %myTy, %myTy* %p, i32 0
+  ret void
+}