[clang] [llvm] [AMDGPU] Implement 'llvm.get.fpenv' and 'llvm.set.fpenv' (PR #83906)

[Joseph Huber via cfe-commits]

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@@ -839,6 +839,18 @@ unsigned test_wavefrontsize() {
   return __builtin_amdgcn_wavefrontsize();
 }
 
+// CHECK-LABEL test_get_fpenv(
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jhuber6 wrote:

Hm, I'm not sure. I feel like this is just letting the user access the hardware directly which has a different use-case to the end user.

https://github.com/llvm/llvm-project/pull/83906