[LLVMdev] Problem with regression tests using stderr

[Dan Gohman]

On Tue, Nov 20, 2007 at 07:01:25PM -0800, Bill Wendling wrote:
> I think that it's a hold-over to how things used to be done. IIRC,  
> you had to have the && at the end of the RUN line if you had another  
> RUN line that needed to be executed. That's no longer the case, of  
> course.

Thanks. I'll remove the && from the one test that still has it then.

Then we can look at removing the associated code from llvm.exp and fixing
the bug. This will take a while though, at it exposes a large number of
failures that are currently hidden.

> If you want to catch stderr, there is one test doing that:
> 
> Analysis/ScalarEvolution/2007-07-15-NegativeStride.ll:
> 
> ; RUN: llvm-as < %s | opt -analyze -scalar-evolution 2>&1 | grep  
> "Loop bb:  100 iterations"

2>&1 doesn't evoke the desired behavior; the RUN line is unfortunately
interpreted by TCL rather than a regular shell. The llvm.exp bug has
allowed this and a variety of other common bourne-shell-isms to slip by
unnoticed.

Dan

-- 
Dan Gohman, Cray Inc.