[compiler-rt] [llvm] [SelectionDAG] Add `STRICT_BF16_TO_FP` and `STRICT_FP_TO_BF16` (PR #80056)

[Shilei Tian via llvm-commits]

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@@ -0,0 +1,180 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-linux-gnu | FileCheck %s --check-prefix=X32
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shiltian wrote:

Borrowed from `llvm/test/CodeGen/X86/half-constrained.ll` as well. 😄

https://github.com/llvm/llvm-project/pull/80056