[llvm] [X86] Correct 32-bit immediate assertion and fix 64-bit lowering for huge frame offsets (PR #123872)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,23 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --no_x86_scrub_sp --version 4
+; RUN: llc -O0 -mtriple=x86_64 -mattr=+avx512f -verify-machineinstrs < %s | FileCheck %s --check-prefix=CHECK
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arsenm wrote:

```suggestion
; RUN: llc -O0 -mtriple=x86_64 -mattr=+avx512f < %s | FileCheck %s --check-prefix=CHECK
```

https://github.com/llvm/llvm-project/pull/123872