[llvm] [LV] Handle FSub Partial Reductions (PR #191186)

[Jacob Crawley via llvm-commits]

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@@ -185,4 +185,174 @@ exit:
   ret i32 %sub
 }
 
+define float @fsub_reduction(float %startval, ptr %src1, ptr %src2) #0 {
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jacob-crawley wrote:

The LV doesn't support this case yet so it will have to be added in a subsequent PR. 

https://github.com/llvm/llvm-project/pull/191186