Re: [PATCH] [ARC] Fix tst_movb pattern.

[Andrew Burgess <andrew.burgess@embecosm.com>]

* Claudiu Zissulescu <Claudiu.Zissulescu@synopsys.com> [2017-05-24 12:54:22 +0200]:

> From: claziss <claziss@synopsys.com>
> 
> The tst_movb pattern is missing guarding when spitting.
> 
> gcc/
> 2017-05-24  Claudiu Zissulescu  <claziss@synopsys.com>
> 
> 	* config/arc/arc.md (tst_movb): Add guard when splitting.

Looks good. Sorry for introducing this issue.

Thanks,
Andrew




> 
> testsuite/
> 2017-05-24  Claudiu Zissulescu  <claziss@synopsys.com>
> 
> 	* gcc.target/arc/pr9001195952.c: New test.
> ---
>  gcc/config/arc/arc.md                       |  2 +-
>  gcc/testsuite/gcc.target/arc/pr9001195952.c | 11 +++++++++++
>  2 files changed, 12 insertions(+), 1 deletion(-)
>  create mode 100755 gcc/testsuite/gcc.target/arc/pr9001195952.c
> 
> diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
> index e78abaa..d5510ae 100644
> --- a/gcc/config/arc/arc.md
> +++ b/gcc/config/arc/arc.md
> @@ -863,7 +863,7 @@ archs4xd, archs4xd_slow"
>     (clobber (match_scratch:SI 3 "=X,X,X,X,X,X,Rrq,Rrq,c"))]
>    "TARGET_NPS_BITOPS"
>    "movb.f.cl %3,%1,%p2,%p2,%s2"
> -  "reload_completed
> +  "TARGET_NPS_BITOPS && reload_completed
>     && (extract_constrain_insn_cached (insn), (which_alternative & ~1) != 6)"
>    [(set (match_dup 0) (match_dup 4))])
>  
> diff --git a/gcc/testsuite/gcc.target/arc/pr9001195952.c b/gcc/testsuite/gcc.target/arc/pr9001195952.c
> new file mode 100755
> index 0000000..252438d
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/arc/pr9001195952.c
> @@ -0,0 +1,11 @@
> +/* { dg-do compile } */
> +/* { dg-skip-if "" { ! { clmcpu } } } */
> +/* { dg-options "-mcpu=archs -Os -w -fpic" } */
> +
> +/* tst_movb split pattern is wrong for anything else than NPS
> +   chip.  */
> +__bswap_32___bsx() {
> +  int a = __builtin_bswap32(__bswap_32___bsx);
> +  if (a & 1048575)
> +    zlog_warn();
> +}
> -- 
> 1.9.1
>