[llvm] LoopVectorize: add test for crash #47665 (PR #91135)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-systemz

@llvm/pr-subscribers-llvm-transforms

Author: Ramkumar Ramachandra (artagnon)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/91135.diff


1 Files Affected:

- (added) llvm/test/Transforms/LoopVectorize/SystemZ/pr47665.ll (+24) 


``````````diff
diff --git a/llvm/test/Transforms/LoopVectorize/SystemZ/pr47665.ll b/llvm/test/Transforms/LoopVectorize/SystemZ/pr47665.ll
new file mode 100644
index 00000000000000..586f4bdc65ef00
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/SystemZ/pr47665.ll
@@ -0,0 +1,24 @@
+; REQUIRES: asserts
+; RUN: not --crash opt -passes=loop-vectorize -mtriple=s390x -mcpu=z14 -disable-output %s
+; RUN: not --crash opt -passes=loop-vectorize -force-vector-width=2 -mtriple=s390x -mcpu=z14 -disable-output %s
+
+define void @test(ptr %p) {
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %for.body, %entry
+  %iv = phi i32 [ 0, %entry ], [ %iv.next, %for.body ]
+  %trunc = trunc i40 0 to i32
+  %icmp.eq = icmp eq i32 %trunc, 0
+  %zext = zext i1 %icmp.eq to i32
+  %icmp.ult = icmp ult i32 0, %zext
+  %or = or i1 %icmp.ult, true
+  %icmp.sgt = icmp sgt i1 %or, false
+  store i1 %icmp.sgt, ptr %p, align 1
+  %iv.next = add i32 %iv, 1
+  %cond = icmp ult i32 %iv.next, 10
+  br i1 %cond, label %for.body, label %exit
+
+exit:                                             ; preds = %for.body
+  ret void
+}

``````````

</details>


https://github.com/llvm/llvm-project/pull/91135