[llvm] [CGData] llvm-cgdata (PR #89884)

[Ellis Hoag via llvm-commits]

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@@ -0,0 +1,32 @@
+# Test for empty cgdata file, which is invalid.
+RUN: touch %t_emptyfile.cgtext
+RUN: not llvm-cgdata dump %t_emptyfile.cgtext -text -o - 2>&1 | FileCheck %s --check-prefix ERROR
+ERROR: {{.}}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 dump %t_emptyheader.cgtext -binary -o %t_emptyheader.cgdata
+
+# Without any cgdata other than the header, no data shows by default.
+RUN: llvm-cgdata show %t_emptyheader.cgdata | FileCheck %s --allow-empty --check-prefix EMPTY
+EMPTY-NOT: any
+
+# 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: {{.}}
+
+# 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 dump %t_emptyheader.cgdata -text -o - | FileCheck %s --allow-empty --check-prefix EMPTY
+
+# Synthesize a header only cgdata.
+# struct Header {
+#   uint64_t Magic;
+#   uint32_t Version;
+#   uint32_t DataKind;
+#   uint64_t OutlinedHashTreeOffset;
+# }
+RUN: printf '\xffcgdata\x81' > %t_header.cgdata
+RUN: printf '\x01\x00\x00\x00' >> %t_header.cgdata
+RUN: printf '\x00\x00\x00\x00' >> %t_header.cgdata
+RUN: printf '\x18\x00\x00\x00\x00\x00\x00\x00' >> %t_header.cgdata
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ellishg wrote:

Nice, thanks for not checking in a binary file :)

https://github.com/llvm/llvm-project/pull/89884