[llvm] [InstCombine] Handle scalable splats of constants in getMinimumFPType (PR #132960)

[David Sherwood via llvm-commits]

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@@ -13,3 +13,16 @@ define <vscale x 2 x float> @shrink_splat_scalable_extend(<vscale x 2 x float> %
   %5 = fptrunc <vscale x 2 x double> %4 to <vscale x 2 x float>
   ret <vscale x 2 x float> %5
 }
+
+define <vscale x 2 x float> @shrink_splat_scalable_extend_rhs_constexpr(<vscale x 2 x float> %a) {
+; CHECK-LABEL: define <vscale x 2 x float> @shrink_splat_scalable_extend_rhs_constexpr(
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david-arm wrote:

Would be good to have a fixed-width variant of this too, if there isn't one already?

https://github.com/llvm/llvm-project/pull/132960