[SLP][NFC]Add remark output to the test with the perfect diamond match

in vectorbuild nodes, NFC.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/X86/crash_clear_undefs.ll

@@ -1,7 +1,18 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -passes=slp-vectorizer -S -mtriple=x86_64-- -mcpu=corei7 | FileCheck %s
+; RUN: opt < %s -passes=slp-vectorizer -S -mtriple=x86_64-- -mcpu=corei7 -pass-remarks-output=%t | FileCheck %s
+; RUN: FileCheck %s --input-file=%t --check-prefix=YAML
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
 
+; YAML-LABEL: --- !Passed
+; YAML-NEXT:  Pass:            slp-vectorizer
+; YAML-NEXT:  Name:            VectorizedList
+; YAML-NEXT:  Function:        foo
+; YAML-NEXT:  Args:
+; YAML-NEXT:    - String:          'SLP vectorized with cost '
+; YAML-NEXT:    - Cost:            '-6'
+; YAML-NEXT:    - String:          ' and with tree size '
+; YAML-NEXT:    - TreeSize:        '10'
+; YAML-NEXT:  ...
 define i1 @foo() {
 ; CHECK-LABEL: @foo(
 ; CHECK-NEXT:    [[TMP1:%.*]] = load float, ptr null, align 4