[PATCH] Fix ICE in vectorization dump (PR tree-optimization/55995)

[Richard Biener]

On Fri, Jan 18, 2013 at 9:51 AM, Sharad Singhai <singhai@google.com> wrote:
> This patch fixes an ICE in vectorization dump when section anchors are present.
>
> Bootstrapped/tested on x86_64 and PPC 64 and found no new failures. OK
> for trunk?

Ok.

Thanks,
Richard.

> Thanks,
> Sharad
>
> 2013-01-18  Sharad Singhai  <singhai@google.com>
>
> PR tree-optimization/55995
> * dumpfile.c (dump_loc): Print location only if available.
> * testsuite/gcc.dg/vect/vect.exp: Use "details" flags for dump info.
> * tree-vectorizer.c (increase_alignment): Intialize vect_location.
>
> Index: dumpfile.c
> ===================================================================
> --- dumpfile.c (revision 195244)
> +++ dumpfile.c (working copy)
> @@ -260,14 +260,13 @@ dump_loc (int dump_kind, FILE *dfile, source_locat
>    /* Currently vectorization passes print location information.  */
>    if (dump_kind)
>      {
> -      if (loc == UNKNOWN_LOCATION)
> +      if (loc != UNKNOWN_LOCATION)
> +        fprintf (dfile, "\n%s:%d: note: ", LOCATION_FILE (loc),
> +                 LOCATION_LINE (loc));
> +      else if (current_function_decl)
>          fprintf (dfile, "\n%s:%d: note: ",
>                   DECL_SOURCE_FILE (current_function_decl),
>                   DECL_SOURCE_LINE (current_function_decl));
> -     else
> -        fprintf (dfile, "\n%s:%d: note: ",
> -                 LOCATION_FILE (loc),
> -                 LOCATION_LINE (loc));
>      }
>  }
>
> Index: testsuite/gcc.dg/vect/vect.exp
> ===================================================================
> --- testsuite/gcc.dg/vect/vect.exp (revision 195244)
> +++ testsuite/gcc.dg/vect/vect.exp (working copy)
> @@ -156,7 +156,8 @@ dg-runtest [lsort [glob -nocomplain $srcdir/$subdi
>
>  # alignment-sensitive -fsection-anchors tests
>  set DEFAULT_VECTCFLAGS $SAVED_DEFAULT_VECTCFLAGS
> -lappend DEFAULT_VECTCFLAGS "-fsection-anchors" "-fdump-ipa-increase_alignment"
> +lappend DEFAULT_VECTCFLAGS "-fsection-anchors" \
> + "-fdump-ipa-increase_alignment-details"
>  dg-runtest [lsort [glob -nocomplain
> $srcdir/$subdir/aligned-section-anchors-*.\[cS\]]]  \
>   "" $DEFAULT_VECTCFLAGS
>
> Index: tree-vectorizer.c
> ===================================================================
> --- tree-vectorizer.c (revision 195244)
> +++ tree-vectorizer.c (working copy)
> @@ -225,6 +225,8 @@ increase_alignment (void)
>  {
>    struct varpool_node *vnode;
>
> +  vect_location = UNKNOWN_LOC;
> +
>    /* Increase the alignment of all global arrays for vectorization.  */
>    FOR_EACH_DEFINED_VARIABLE (vnode)
>      {