[llvm] [InstCombine] Optimize `sinh` and `cosh` divisions (PR #81433)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,114 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -passes=instcombine < %s | FileCheck %s
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arsenm wrote:

Probably need run lines with different triples for different libcall availability (at least needs to use an explicit triple) 

https://github.com/llvm/llvm-project/pull/81433