[llvm] [FileCheck] Add a diff output option for FileCheck (PR #187120)

Fangrui Song via llvm-commits llvm-commits at lists.llvm.org
Sat Apr 18 00:41:58 PDT 2026


MaskRay wrote:

This implementation is buggy. 
```
FILECHECK_OPTS=--diff ninja -C /tmp/Rel check-lld-elf
```
has 1341 failures. 

https://github.com/llvm/llvm-project/pull/187120


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