[llvm] [X86] Prefer 128-bit vectors for Bulldozer CPUs (PR #225838)

[Simon Pilgrim via llvm-commits]

================
@@ -1,7 +1,7 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -mtriple=x86_64-unknown -passes=slp-vectorizer -S | FileCheck %s --check-prefix=NO-FMA
 ; RUN: opt < %s -mtriple=x86_64-unknown -mcpu=corei7-avx -passes=slp-vectorizer -S | FileCheck %s --check-prefix=NO-FMA
-; RUN: opt < %s -mtriple=x86_64-unknown -mcpu=bdver1 -passes=slp-vectorizer -S | FileCheck %s --check-prefixes=FMA,FMA256
+; RUN: opt < %s -mtriple=x86_64-unknown -mcpu=bdver1 -passes=slp-vectorizer -S | FileCheck %s --check-prefix=FMA128
----------------
RKSimon wrote:

```suggestion
; RUN: opt < %s -mtriple=x86_64-unknown -mcpu=bdver1 -passes=slp-vectorizer -S | FileCheck %s --check-prefixes=FMA,FMA128
```

https://github.com/llvm/llvm-project/pull/225838