[llvm] [X86] Manage atomic load of fp -> int promotion in DAG (PR #118793)

[Simon Pilgrim via llvm-commits]

================
@@ -1,12 +1,17 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc < %s -mtriple=x86_64-apple-macosx10.7.0 -verify-machineinstrs | FileCheck %s
-; RUN: llc < %s -mtriple=x86_64-apple-macosx10.7.0 -verify-machineinstrs -O0 | FileCheck %s
+; RUN: llc < %s -mtriple=x86_64-apple-macosx10.7.0 -verify-machineinstrs -O0 | FileCheck %s --check-prefix=CHECK0
----------------
RKSimon wrote:

Reduce check duplication:
```
; RUN: llc < %s -mtriple=x86_64-apple-macosx10.7.0 -verify-machineinstrs | FileCheck %s --check-prefixes=CHECK,CHECK3
; RUN: llc < %s -mtriple=x86_64-apple-macosx10.7.0 -verify-machineinstrs -O0 | FileCheck %s --check-prefixes=CHECK,CHECK0
```

https://github.com/llvm/llvm-project/pull/118793