[llvm] [InstCombine] Add support for Instruction combining of hyperbolic functions (PR #173730)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,79 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+define double @src_cosh(double noundef %x) {
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arsenm wrote:

put fneg in the function name? 

https://github.com/llvm/llvm-project/pull/173730