[gcc r14-4711] Re-instantiate integer mask to traditional vector mask support

[gcc r14-4711] Re-instantiate integer mask to traditional vector mask support

[Richard Biener]

https://gcc.gnu.org/g:b0372ef12f6f7f863606b0d2858d049b18a4cfda

commit r14-4711-gb0372ef12f6f7f863606b0d2858d049b18a4cfda
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Oct 18 09:13:23 2023 +0200

    Re-instantiate integer mask to traditional vector mask support
    
    The following allows to pass integer mask data as traditional
    vector mask for OMP SIMD clone calls which is required due to
    the limited set of OMP SIMD clones in the x86 ABI when using
    AVX512 but a prefered vector size of 256 bits.
    
            * tree-vect-stmts.cc (vectorizable_simd_clone_call):
            Relax check to again allow passing integer mode masks
            as traditional vectors.

Diff:
---
 gcc/tree-vect-stmts.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 2974eb6a981b..e5ff44c25f10 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -4384,9 +4384,16 @@ vectorizable_simd_clone_call (vec_info *vinfo, stmt_vec_info stmt_info,
 		i = -1;
 		break;
 	      case SIMD_CLONE_ARG_TYPE_MASK:
+		/* While we can create a traditional data vector from
+		   an incoming integer mode mask we have no good way to
+		   force generate an integer mode mask from a traditional
+		   boolean vector input.  */
 		if (SCALAR_INT_MODE_P (n->simdclone->mask_mode)
-		    != SCALAR_INT_MODE_P (TYPE_MODE (arginfo[i].vectype)))
+		    && !SCALAR_INT_MODE_P (TYPE_MODE (arginfo[i].vectype)))
 		  i = -1;
+		else if (!SCALAR_INT_MODE_P (n->simdclone->mask_mode)
+			 && SCALAR_INT_MODE_P (TYPE_MODE (arginfo[i].vectype)))
+		  this_badness += 2048;
 		break;
 	      }
 	    if (i == (size_t) -1)