[llvm] [DAG] computeKnownFPClass - add ISD::SPLAT_VECTOR handling (PR #189780)

[Simon Pilgrim via llvm-commits]

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@@ -0,0 +1,111 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=aarch64 -mattr=+sve < %s | FileCheck %s
+
+define i1 @isinf_f32(float %x) {
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RKSimon wrote:

these aarch64 tests don't use splat?

https://github.com/llvm/llvm-project/pull/189780