[llvm] [RISCV] Vectorize phi for loop carried @llvm.vp.reduce.* (PR #131974)

[via llvm-commits]

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@@ -42,3 +42,459 @@ vector.body:
 exit:
   ret float %acc
 }
+
+define i32 @vp_reduce_add(ptr %a) {
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NexMing wrote:

> Oh sorry, I meant as in only having two commits, one that adds the tests without the changes in RISCVCodgenPrepare, and another with the changes in RISCVCodegenPrepare that shows the change in the tests, e.g. see https://llvm.org/docs/InstCombineContributorGuide.html#precommit-tests

Sorry, I misunderstood. I get it now.

https://github.com/llvm/llvm-project/pull/131974