1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/select-2.ll b/test/Transforms/InstCombine/select-2.ll
new file mode 100644
index 0000000..a76addc
--- /dev/null
+++ b/test/Transforms/InstCombine/select-2.ll
@@ -0,0 +1,18 @@
+; RUN: opt < %s -instcombine -S | grep select | count 2
+
+; Make sure instcombine don't fold select into operands. We don't want to emit
+; select of two integers unless it's selecting 0 / 1.
+
+define i32 @t1(i32 %c, i32 %x) nounwind {
+       %t1 = icmp eq i32 %c, 0
+       %t2 = lshr i32 %x, 18
+       %t3 = select i1 %t1, i32 %t2, i32 %x
+       ret i32 %t3
+}
+
+define i32 @t2(i32 %c, i32 %x) nounwind {
+       %t1 = icmp eq i32 %c, 0
+       %t2 = and i32 %x, 18
+       %t3 = select i1 %t1, i32 %t2, i32 %x
+       ret i32 %t3
+}