1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/Blackfin/2009-08-04-LowerExtract-Live.ll b/test/CodeGen/Blackfin/2009-08-04-LowerExtract-Live.ll
new file mode 100644
index 0000000..3ee5e8d
--- /dev/null
+++ b/test/CodeGen/Blackfin/2009-08-04-LowerExtract-Live.ll
@@ -0,0 +1,15 @@
+; RUN: llc < %s -march=bfin -join-liveintervals=0 -verify-machineinstrs
+
+; Provoke an error in LowerSubregsPass::LowerExtract where the live range of a
+; super-register is illegally extended.
+
+define i16 @f(i16 %x1, i16 %x2, i16 %x3, i16 %x4) {
+  %y1 = add i16 %x1, 1
+  %y2 = add i16 %x2, 2
+  %y3 = add i16 %x3, 3
+  %y4 = add i16 %x4, 4
+  %z12 = add i16 %y1, %y2
+  %z34 = add i16 %y3, %y4
+  %p = add i16 %z12, %z34
+  ret i16 %p
+}