[llvm] Add LoopVectorizer support for `llvm.vector.partial.reduce.fadd` (PR #163975)

[Damian Heaton via llvm-commits]

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@@ -0,0 +1,1063 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
+; RUN: opt -passes=loop-vectorize -force-vector-interleave=1 -enable-epilogue-vectorization=false -mattr=+sve2p1,+dotprod -S < %s | FileCheck %s --check-prefixes=CHECK-INTERLEAVE1
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dheaton-arm wrote:

Added test coverage for other `fpext`s and cases where we don't extend at all (so `fdot` isn't applicable).

https://github.com/llvm/llvm-project/pull/163975