[cfe-dev] How to write a test for bug 27981? (Missing LValueToRValue cast)

[Richard Trieu via cfe-dev]

Hi Tom,

If you expect the AST to stay stable, you can pass the output of -ast-dump
to FileCheck and use FileCheck to confirm that the cast is there.
 test/SemaCXX/template-implicit-vars.cpp is an example which uses this
technique.  In addition, the documentation for FileCheck is at
http://llvm.org/docs/CommandGuide/FileCheck.html

Since LValueToRValue casts are common, it would be better to use a CHECK
followed by several CHECK-NEXT's since CHECK-NEXT does not allow extra
lines between the previous check line.

Richard


On Thu, Feb 16, 2017 at 9:27 AM, Tom Honermann via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> I have a fix for the following bug ready and would like to submit it for
> review:
>
> Bug 27981 - Missing LValueToRValue casts for use of
> __builtin_shufflevector in function template instantiations
> https://bugs.llvm.org//show_bug.cgi?id=27981
>
> I'm not sure how to write a test for this though.  The issue is a
> missing LValueToRValue cast.  Code gen is already tolerant of the
> missing cast so isn't affected by the fix.  I'm not very familiar with
> the infrastructure available in the Clang test suite.
>
> Tom.
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20170216/14daec12/attachment.html>