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31 lines
995 B
Plaintext
31 lines
995 B
Plaintext
---
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syntax: markdown
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tags: [tldr, common]
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source: https://github.com/tldr-pages/tldr.git
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---
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# FileCheck
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> Flexible pattern matching file verifier.
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> It is typically used from LLVM regression tests and forms a part of a `lit` test.
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> More information: <https://llvm.org/docs/CommandGuide/FileCheck.html>.
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- Match `input_file` content with pattern file `check_file`:
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`FileCheck --input-file={{path/to/input_file}} {{path/to/check_file}}`
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- Match input from the `stdin` with pattern file `check_file`:
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`echo "{{some_text}}" | FileCheck {{path/to/check_file}}`
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- Match with the specified custom check `prefix` (Note: The default prefix is `CHECK`):
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`echo "{{some_text}}" | FileCheck --check-prefix={{prefix}} {{path/to/check_file}}`
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- Print good directive pattern matches:
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`echo "{{some_text}}" | FileCheck -v {{path/to/check_file}}`
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- Input `llvm_code.ll` into llvm-as, then pipe the output into FileCheck to match:
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`llvm-as {{path/to/llvm_code.ll}} | FileCheck {{path/to/check_file}}`
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