[llvm] [TLI][AArch64] Add extra SLEEF mappings and tests (PR #78140)

[Paschalis Mpeis via llvm-commits]

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@@ -2349,6 +2645,79 @@ for.cond.cleanup:
   ret void
 }
 
+declare void @sincospi(double, ptr, ptr)
+declare void @sincospif(float, ptr, ptr)
+
+define void @test_sincospi(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
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paschalis-mpeis wrote:

nit: use `sincospi_f64` so it uses the same naming convention with the remaining tests

https://github.com/llvm/llvm-project/pull/78140