[modules][test] Bump maximum size for embed-files-compressed.cpp for the sake of RISC-V

[asb]

The size of a.pcm produced by an RV64 clang running natively is 67416 bytes, causing this test to fail. Bump up the maximum size. The test still retains its original intent as far as I can see, as it's really trying to ensure that compressing kicks in and reduces the multi-megabyte input.

[llvmbot]

@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clang-modules

Author: Alex Bradbury (asb)

Changes

The size of a.pcm produced by an RV64 clang running natively is 67416 bytes, causing this test to fail. Bump up the maximum size. The test still retains its original intent as far as I can see, as it's really trying to ensure that compressing kicks in and reduces the multi-megabyte input.

---

Full diff: https://github.com/llvm/llvm-project/pull/111360.diff

1 Files Affected:

• (modified) clang/test/Modules/embed-files-compressed.cpp (+2-2)

diff --git a/clang/test/Modules/embed-files-compressed.cpp b/clang/test/Modules/embed-files-compressed.cpp
index 873b3082a2fdfa..aca9983ff160b6 100644
--- a/clang/test/Modules/embed-files-compressed.cpp
+++ b/clang/test/Modules/embed-files-compressed.cpp
@@ -17,7 +17,7 @@
 // RUN: %clang_cc1 -fmodules -I%t -fmodules-cache-path=%t -fmodule-name=a -emit-module %t/modulemap -fmodules-embed-all-files -o %t/a.pcm
 //
 // The above embeds ~4.5MB of highly-predictable /s and \ns into the pcm file.
-// Check that the resulting file is under 60KB:
+// Check that the resulting file is under 80KB:
 //
 // RUN: wc -c %t/a.pcm | FileCheck --check-prefix=CHECK-SIZE %s
-// CHECK-SIZE: {{(^|[^0-9])[1-5][0-9][0-9][0-9][0-9]($|[^0-9])}}
+// CHECK-SIZE: {{(^|[^0-9])[1-7][0-9][0-9][0-9][0-9]($|[^0-9])}}

[asb]

In terms of why it's larger on RISC-V and has got bigger, I don't know enough about C++ modules to investigate much. -module-file-info wasn't very informative. The last commit that bumped up the maximum size was fa45f81 suggesting it may be increasing as new types are added to the RISC-V vector extension.

[ChuanqiXu9]

Thanks.

The underlying issue worths more investigating. But giving we don't have enough developers on modules and RV, maybe this is the best thing we can do now.