[llvm] [X86][NFC] Moved/Updated llvm.set.rounding testcases (PR #155434)

[Evgenii Kudriashov via llvm-commits]

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@@ -0,0 +1,256 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=-sse -verify-machineinstrs < %s | FileCheck %s -check-prefixes=NOSSE,SDAG-X86-NOSSE
+; RUN: llc -mtriple=i686-unknown-linux-gnu -global-isel=1 -global-isel-abort=2 -mattr=-sse -verify-machineinstrs < %s | FileCheck %s -check-prefixes=NOSSE,GISEL-X86-NOSSE
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e-kud wrote:

@RKSimon we have a list of tests that we kept untouched as it was simple to add a single line with GISEL
```
llvm/test/CodeGen/X86/llvm.acos.ll
llvm/test/CodeGen/X86/llvm.asin.ll
llvm/test/CodeGen/X86/llvm.atan2.ll
llvm/test/CodeGen/X86/llvm.atan.ll
llvm/test/CodeGen/X86/llvm.cosh.ll
llvm/test/CodeGen/X86/llvm.cos.ll
llvm/test/CodeGen/X86/llvm.sincos.ll
llvm/test/CodeGen/X86/llvm.sinh.ll
llvm/test/CodeGen/X86/llvm.sin.ll
llvm/test/CodeGen/X86/llvm.tanh.ll
llvm/test/CodeGen/X86/llvm.tan.ll
```
Do we want to move them to `isel-<name>` as well? (Maybe in scope of another PR).

https://github.com/llvm/llvm-project/pull/155434