Re: [Boolean Vector, patch 1/5] Introduce boolean vector to be used as a vector comparison type

[Ilya Enkovich]

On 22 Oct 12:37, Andreas Schwab wrote:
> Ilya Enkovich <enkovich....@gmail.com> writes:
> 
> > 2015-10-22 13:13 GMT+03:00 Andreas Schwab <sch...@suse.de>:
> >> FAIL: gcc.c-torture/compile/pr54713-1.c   -O0  (internal compiler error)
> >
> > Can't reproduce it on i386. What's config used?
> 
> http://gcc.gnu.org/ml/gcc-testresults/2015-10/msg02350.html
> http://gcc.gnu.org/ml/gcc-testresults/2015-10/msg02361.html
> http://gcc.gnu.org/ml/gcc-testresults/2015-10/msg02396.html
> 
> Andreas.
> 
> -- 
> Andreas Schwab, SUSE Labs, sch...@suse.de
> GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
> "And now for something completely different."

Thanks!
The problem is in wrong mboolean vector size in case target cannot provide a 
mode for it.  I tested it on i386 with vector extension switched off, but with 
extensions off vector modes still exist, thus I missed this case.  Here is a 
patch to fix it.  Bootstrapped and regtested on powerpc64le-unknown-linux-gnu.  
I see disappeared fails:

gcc.c-torture/compile/pr54713-2.c   -O0  (test for excess errors)
gcc.c-torture/compile/pr54713-3.c   -O0  (test for excess errors)

I believe other targets should be fixed as well.

Thanks,
Ilya
--
gcc/

2015-10-22  Ilya Enkovich  <enkovich....@gmail.com>

        * tree.c (build_truth_vector_type): Support BLK mode
        returned for boolean vector.


diff --git a/gcc/tree.c b/gcc/tree.c
index 7d10dd6..836b69a 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -10654,8 +10654,12 @@ build_truth_vector_type (unsigned nunits, unsigned 
vector_size)
 
   gcc_assert (mask_mode != VOIDmode);
 
-  unsigned HOST_WIDE_INT esize = GET_MODE_BITSIZE (mask_mode) / nunits;
-  gcc_assert (esize * nunits == GET_MODE_BITSIZE (mask_mode));
+  unsigned HOST_WIDE_INT vsize = GET_MODE_BITSIZE (mask_mode);
+  if (!vsize)
+    vsize = vector_size * BITS_PER_UNIT;
+
+  unsigned HOST_WIDE_INT esize = vsize / nunits;
+  gcc_assert (esize * nunits == vsize);
 
   tree bool_type = build_nonstandard_boolean_type (esize);