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

[Luke Lau via llvm-commits]

================
@@ -137,7 +137,8 @@ bool RISCVCodeGenPrepare::visitIntrinsicInst(IntrinsicInst &I) {
   if (expandVPStrideLoad(I))
     return true;
 
-  if (I.getIntrinsicID() != Intrinsic::vector_reduce_fadd)
+  if (I.getIntrinsicID() != Intrinsic::vector_reduce_fadd &&
+      !isa<VPReductionIntrinsic>(&I))
----------------
lukel97 wrote:

Should this be limited to just fadd reductions?

```suggestion
      !I.getIntrinsicID() != Intrinsic::vp_reduce_fadd)
```

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