[llvm] [IR] Add `llvm.sincos` intrinsic (PR #109825)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,106 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+; RUN: llc -O0 -mtriple=aarch64-linux-gnu -global-isel -stop-after=irtranslator %s -o - | FileCheck %s
+
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arsenm wrote:

Test flag preservation 

https://github.com/llvm/llvm-project/pull/109825