Re: Running 32-bit testsuite on x86_64 - dg-skip-if help

[Andreas Jaeger <aj at suse dot de>]

Andreas Jaeger <aj@suse.de> writes:

> I'm bootstrapping on x86_64-linux-gnu and test always both the 32-bit
> and 64-bit multilib (using -m32 for the former).  Since the 32-bit
> target is the x86 target, we could run all specific i?86 tests to get
> more coverage.
>
> I have two question:
> - should we really do this for all i?68 specific tests?
>
> - and what's the best way?
>
> For example, gcc.misc-tests/i386-pf-3dnow-1.c has:
> /* { dg-do compile { target i?86-*-* } } */
> /* { dg-skip-if "" { i?86-*-* } { "-m64" } { "" } } */
>
> So, this will only run on i?86 if "-m64" is not given. If I add x86_64
> as target, how can I only run it if -m32 is given?  Would this be the
> proper way?
>
> /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
> /* { dg-skip-if "" { i?86-*-* } { "-m64" } { "" } } */
> /* { dg-skip-if "" { x86_64-*-* } { "" } { "-m32" } } */
>
> Or should we use?
>
> /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
> /* { dg-require-effective-target ilp32 } */
>
> What is better to do?  The dg-require-effective-target compiles
> another test program which might slow down the testsuite runs...

One more question: gcc.dg/i386-local.c has:

/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-O2 -funit-at-a-time" } */
/* { dg-final { scan-assembler "magic\[^\\n\]*eax" { target i?86-*-* } } } */
/* { dg-final { scan-assembler "magic\[^\\n\]*edi" { target x86_64-*-* } } } */

What's the best way t o write the two dg-final lines so that the test
does the right thing for both 32-bit and 64-bit code?

Andreas
-- 
 Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
  SUSE Linux Products GmbH, Maxfeldstr. 5, 90409 NÃrnberg, Germany
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