1 files changed, 10 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2007-03-19-BadTruncChangePR1261.ll b/test/Transforms/InstCombine/2007-03-19-BadTruncChangePR1261.ll
new file mode 100644
index 0000000..da58dec
--- /dev/null
+++ b/test/Transforms/InstCombine/2007-03-19-BadTruncChangePR1261.ll
@@ -0,0 +1,10 @@
+; RUN: llvm-as %s -o - | opt -instcombine | llvm-dis | grep zext
+; PR1261. 
+
+define i16 @test(i31 %zzz) {
+  %A = sext i31 %zzz to i32
+  %B = add i32 %A, 16384
+  %C = lshr i32 %B, 15
+  %D = trunc i32 %C to i16
+  ret i16 %D
+}