[llvm] [LV] Get FMFs from VectorBuilder in createSimpleReduction. NFC (PR #132017)

[Luke Lau via llvm-commits]

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@@ -87,6 +87,9 @@ class VectorBuilder {
     StaticVectorLength = ElementCount::getFixed(NewFixedVL);
     return *this;
   }
+
+  FastMathFlags &getFastMathFlags() const { return Builder.getFastMathFlags(); }
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lukel97 wrote:

Done, thanks!

https://github.com/llvm/llvm-project/pull/132017