1 files changed, 27 insertions, 0 deletions
diff --git a/test/Transforms/LCSSA/unreachable-use.ll b/test/Transforms/LCSSA/unreachable-use.ll
new file mode 100644
index 0000000..c389c9c
--- /dev/null
+++ b/test/Transforms/LCSSA/unreachable-use.ll
@@ -0,0 +1,27 @@
+; RUN: opt < %s -lcssa -S -verify-loop-info | grep {\[%\]tmp33 = load i1\\*\\* \[%\]tmp}
+; PR6546
+
+; LCSSA doesn't need to transform uses in blocks not reachable
+; from the entry block.
+
+define fastcc void @dfs() nounwind {
+bb:
+  br label %bb44
+
+bb44:
+  br i1 undef, label %bb7, label %bb45
+
+bb7:
+  %tmp = bitcast i1** undef to i1**
+  br label %bb15
+
+bb15:
+  br label %bb44
+
+bb32:
+  %tmp33 = load i1** %tmp, align 8
+  br label %bb45
+
+bb45:
+  unreachable
+}