[llvm] [X86][GlobalIsel] support G_FABS for f80 (PR #136718)

[Evgenii Kudriashov via llvm-commits]

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@@ -0,0 +1,52 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s  -mtriple=x86_64-unknown-linux-gnu -global-isel=0 -mattr=+x87,+sse,+sse2 -o - | FileCheck %s --check-prefix=X64
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -global-isel=1 -mattr=+x87,+sse,+sse2 -o - | FileCheck %s -check-prefixes=GISEL
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e-kud wrote:

Can we add a common prefix for SDAG and GISEL? Usually we use `X64` or `X86` as a common prefix and something like `X64-SDAG/GISEL` as unique ones.

https://github.com/llvm/llvm-project/pull/136718