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Subject: [Bug debug/44832] [4.6 Regression] -fcompare-debug failure for C++ i386.c
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------- Comment #16 from rguenther at suse dot de  2010-07-07 13:24 -------
Subject: Re:  [4.6 Regression] -fcompare-debug failure for
 C++ i386.c

On Wed, 7 Jul 2010, amylaar at gcc dot gnu dot org wrote:

> ------- Comment #14 from amylaar at gcc dot gnu dot org  2010-07-07 13:22 -------
> (In reply to comment #12)
> $ diff -u -I '^  # DEBUG.*$' t.c.025t.* t.c.gk.025t.*
> --- t.c.025t.einline2   2010-07-07 13:59:11.251978485 +0100
> +++ t.c.gk.025t.einline2        2010-07-07 13:59:11.451101846 +0100
> @@ -149,14 +161,14 @@
>    int i;
>    int n;
>    struct rtx_def * ops[32];
> +  unsigned char D.1889;
>    unsigned char D.1888;
> -  unsigned char D.1887;
> +  int D.1887;
>    int D.1886;
> -  int D.1885;
>    int ix86_isa_flags.6;
> -  struct rtx_def * D.1883;
> -  struct rtvec_def * D.1882;
> -  const unsigned char D.1881;
> +  struct rtx_def * D.1884;
> +  struct rtvec_def * D.1883;
> +  const unsigned char D.1882;
>    int mode.5;
>    struct rtvec_def * * D.1872;
>    int D.1817;
> @@ -329,22 +365,26 @@
> 
>  <L27>:
>    mode.5_58 = (int) mode_12;
> -  D.1881_59 = mode_nunits[mode.5_58];
> -  n_60 = (int) D.1881_59;
> +  D.1882_59 = mode_nunits[mode.5_58];
> +  n_60 = (int) D.1882_59;
> +  # DEBUG n => n_60
>    ix86_expand_vector_init_concat (mode_12, target_10(D), &ops[0], n_60);
>    goto <bb 32>;
> 
>  half:
>    mode.5_61 = (int) mode_12;
> -  D.1881_62 = mode_nunits[mode.5_61];
> -  n_63 = (int) D.1881_62;
> +  D.1882_62 = mode_nunits[mode.5_61];
> +  n_63 = (int) D.1882_62;
> +  # DEBUG n => n_63
> +  # DEBUG i => 0
>    goto <bb 26>;
> 
>  <bb 25>:
> -  D.1882_64 = *D.1872_50;
> -  D.1883_66 = D.1882_64->elem[i_65];
> -  ops[i_65] = D.1883_66;
> +  D.1883_64 = *D.1872_50;
> +  D.1884_66 = D.1883_64->elem[i_65];
> +  ops[i_65] = D.1884_66;
>    i_67 = i_65 + 1;
> +  # DEBUG i => i_67
> 
>  <bb 26>:
>    # i_65 = PHI <0(24), i_67(25)>
> @@ -359,25 +401,26 @@
> 
>  <L29>:
>    ix86_isa_flags.6_68 = ix86_isa_flags;
> -  D.1885_69 = ix86_isa_flags.6_68 & 524288;
> -  if (D.1885_69 == 0)
> +  D.1886_69 = ix86_isa_flags.6_68 & 524288;
> +  if (D.1886_69 == 0)
>      goto <bb 30> (<L31>);
>    else
>      goto <bb 29> (<L30>);
> 
>  <L30>:
>    ix86_isa_flags.6_70 = ix86_isa_flags;
> -  D.1886_71 = ix86_isa_flags.6_70 & 131072;
> -  if (D.1886_71 == 0)
> +  D.1887_71 = ix86_isa_flags.6_70 & 131072;
> +  if (D.1887_71 == 0)
>      goto <bb 30> (<L31>);
>    else
>      goto <bb 32>;
> 
>  <L31>:
>    mode.5_72 = (int) mode_12;
> -  D.1887_73 = mode_size[mode.5_72];
> -  D.1888_74 = D.1887_73 / 4;
> -  if (D.1888_74 == 4)
> +  D.1888_73 = mode_size[mode.5_72];
> +  D.1889_74 = D.1888_73 / 4;
> +  # DEBUG n_words => (int) D.1889_74
> +  if (D.1889_74 == 4)
>      goto <bb 31>;
>    else
>      goto <bb 32>;

Maybe I'm blind, but the SSA name versions are all the same in
the above diff.

Richard.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44832