[llvm] [SystemZ] SLP reductions: cost functions of reductions and scalarization (PR #112491)

[Alexey Bataev via llvm-commits]

================
@@ -0,0 +1,88 @@
+; RUN: opt -S --passes=slp-vectorizer -mtriple=s390x-unknown-linux -mcpu=z16 < %s | FileCheck %s
----------------
alexey-bataev wrote:

Better precommit the test with the current codegen. Also, would be good to add cost estimations check to show that is modified

https://github.com/llvm/llvm-project/pull/112491