[llvm] VectorCombine: add test for crash #88796 (PR #91200)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: Ramkumar Ramachandra (artagnon)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/91200.diff


1 Files Affected:

- (added) llvm/test/Transforms/VectorCombine/pr88796.ll (+11) 


``````````diff
diff --git a/llvm/test/Transforms/VectorCombine/pr88796.ll b/llvm/test/Transforms/VectorCombine/pr88796.ll
new file mode 100644
index 00000000000000..d5cd52e11d39d7
--- /dev/null
+++ b/llvm/test/Transforms/VectorCombine/pr88796.ll
@@ -0,0 +1,11 @@
+; REQUIRES: asserts
+; RUN: not --crash opt -passes=vector-combine -disable-output %s
+
+define i32 @test() {
+entry:
+  %0 = tail call i16 @llvm.vector.reduce.and.nxv8i16(<vscale x 8 x i16> trunc (<vscale x 8 x i32> shufflevector (<vscale x 8 x i32> insertelement (<vscale x 8 x i32> poison, i32 268435456, i64 0), <vscale x 8 x i32> poison, <vscale x 8 x i32> zeroinitializer) to <vscale x 8 x i16>))
+  ret i32 0
+}
+
+declare i16 @llvm.vector.reduce.and.nxv8i16(<vscale x 8 x i16>)
+

``````````

</details>


https://github.com/llvm/llvm-project/pull/91200