llvm/test/tools/llvm-cgdata/empty.test

# Test no input file
RUN: not llvm-cgdata --convert --output - 2>&1 | FileCheck %s --check-prefix=NOFILE --ignore-case
NOFILE: error: No input file is specified.

# Test for empty cgdata file, which is invalid.
RUN: touch %t_emptyfile.cgtext
RUN: not llvm-cgdata --convert %t_emptyfile.cgtext --format text 2>&1 | FileCheck %s --check-prefix=EMPTY
EMPTY: {{.}}emptyfile.cgtext: empty codegen data

# Test for empty header in the text format. It can be converted to a valid binary file.
RUN: printf '#' > %t_emptyheader.cgtext
RUN: llvm-cgdata --convert %t_emptyheader.cgtext --format binary -o %t_emptyheader.cgdata

# Without any cgdata other than the header, no data shows by default.
RUN: llvm-cgdata --show %t_emptyheader.cgdata | count 0

# The version number appears when asked, as it's in the header
RUN: llvm-cgdata --show --cgdata-version %t_emptyheader.cgdata | FileCheck %s --check-prefix=VERSION
VERSION: Version: 2

# When converting a binary file (w/ the header only) to a text file, it's an empty file as the text format does not have an explicit header.
RUN: llvm-cgdata --convert %t_emptyheader.cgdata --format text | count 0

# Synthesize a header only cgdata.
# struct Header {
#   uint64_t Magic;
#   uint32_t Version;
#   uint32_t DataKind;
#   uint64_t OutlinedHashTreeOffset;
#   uint64_t StableFunctionMapOffset;
# }
RUN: printf '\xffcgdata\x81' > %t_header.cgdata
RUN: printf '\x02\x00\x00\x00' >> %t_header.cgdata
RUN: printf '\x00\x00\x00\x00' >> %t_header.cgdata
RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_header.cgdata
RUN: printf '\x20\x00\x00\x00\x00\x00\x00\x00' >> %t_header.cgdata
RUN: diff %t_header.cgdata %t_emptyheader.cgdata