Hi Wilco,
> Richard Earnshaw wrote:
>> Except that I think this would be better done as an 'effective target'
>> test; something like
>>
>> dg-require-effective-target autoincdec
>
> Right I figured out how to do this - not trivial as it needs a secret flag
> in the
> glob call - if anyone knows a better way of doing this I'd like to know!
>
>
> Add check_effective_target_autoincdec that returns true if a target
> runs the auto_inc_dec optimization pass.
>
> OK for commit?
>
> ChangeLog:
> 2017-08-08 Wilco Dijkstra <wdijk...@arm.com>
>
> gcc/testsuite/
>
> * gcc.dg/pr46932.c: Use effective_target autoincdec.
> * lib/target-supports.exp: Add check_effective_target_autoincdec.
> --
>
> diff --git a/gcc/testsuite/gcc.dg/pr46932.c b/gcc/testsuite/gcc.dg/pr46932.c
> index
> 4eb1a99e1bd9403f8b1c5d0d71ef731ad4a65128..2b39990d036035d22e226b98351a4900a5dbb309
> 100644
> --- a/gcc/testsuite/gcc.dg/pr46932.c
> +++ b/gcc/testsuite/gcc.dg/pr46932.c
> @@ -1,7 +1,5 @@
> /* { dg-options "-O2 -fdump-rtl-auto_inc_dec" } */
> -
> -/* Build on targets which have pre increment. */
> -/* { dg-do compile { target aarch64*-*-* arm*-*-* rs6000-*-* powerpc*-*-*
> arc*-*-* m32r-*-* tic6x-*-* } } */
> +/* { dg-require-effective-target autoincdec } */
>
> /* Check that accesses based on the frame pointer do not
> use auto increment. */
> diff --git a/gcc/testsuite/lib/target-supports.exp
> b/gcc/testsuite/lib/target-supports.exp
> index
> 5a6562794b2bdd5f370fc5b26d6887777f02779a..5219fbf4671e83a6fa7affdab926115e8a23f9cb
> 100644
> --- a/gcc/testsuite/lib/target-supports.exp
> +++ b/gcc/testsuite/lib/target-supports.exp
> @@ -8482,3 +8482,18 @@ proc check_effective_target_arm_coproc4_ok { } {
> return [check_cached_effective_target arm_coproc4_ok \
> check_effective_target_arm_coproc4_ok_nocache]
> }
> +
> +# Return 1 if the target supports the auto_inc_dec optimization pass.
> +proc check_effective_target_autoincdec { } {
> + if { ![check_no_compiler_messages auto_incdec assembly { void f () { }
> + } "-O2 -fdump-rtl-auto_inc_dec" ] } {
> + return 0
> + }
> +
> + set dumpfile [glob -nocomplain
> "auto_incdec[pid].c.\[0-9\]\[0-9\]\[0-9\]r.auto_inc_dec"]
> + if { [file exists $dumpfile ] } {
> + file delete $dumpfile
> + return 1
> + }
> + return 0
> +}
the new keyword needs documenting in sourcebuild.texi (often forgotten ;-)
Rainer
--
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Rainer Orth, Center for Biotechnology, Bielefeld University
