1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/NaCl/expand-tls-phi.ll b/test/Transforms/NaCl/expand-tls-phi.ll
new file mode 100644
index 0000000000..0292a1d633
--- /dev/null
+++ b/test/Transforms/NaCl/expand-tls-phi.ll
@@ -0,0 +1,23 @@
+; RUN: opt < %s -nacl-expand-tls -S | FileCheck %s
+
+
+@tvar = thread_local global i32 123
+
+define i32* @get_tvar(i1 %cmp) {
+entry:
+  br i1 %cmp, label %return, label %else
+
+else:
+  br label %return
+
+return:
+  %result = phi i32* [ @tvar, %entry ], [ null, %else ]
+  ret i32* %result
+}
+; The TLS access gets pushed back into the PHI node's incoming block,
+; which might be suboptimal but works in all cases.
+; CHECK: entry:
+; CHECK: %field = getelementptr %tls_struct* %tls_struct, i32 -1, i32 0, i32 0
+; CHECK: else:
+; CHECK: return:
+; CHECK: %result = phi i32* [ %field, %entry ], [ null, %else ]