https://gcc.gnu.org/g:ca275b68ef11d7d70bff8d7426e45b37366664b3
commit r14-10436-gca275b68ef11d7d70bff8d7426e45b37366664b3
Author: Richard Biener <rguent...@suse.de>
Date: Thu Jul 11 10:18:55 2024 +0200
tree-optimization/115867 - ICE with simdcall vectorization in masked loop
When only a loop mask is to be supplied for the inbranch arg to a
simd function we fail to handle integer mode masks correctly. We
need to guess the number of elements represented by it. This assumes
that excess arguments are all for masks, I wasn't able to create
a simdclone with more than one integer mode mask argument.
The gcc.dg/vect/vect-simd-clone-20.c exercises this with -mavx512vl
PR tree-optimization/115867
* tree-vect-stmts.cc (vectorizable_simd_clone_call): Properly
guess the number of mask elements for integer mode masks.
(cherry picked from commit 4f4478f0f31263997bfdc4159f90e58dd79b38f9)
Diff:
---
gcc/tree-vect-stmts.cc | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 21e8fe98e44a..eed5c7d821cb 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -4716,7 +4716,12 @@ vectorizable_simd_clone_call (vec_info *vinfo,
stmt_vec_info stmt_info,
SIMD_CLONE_ARG_TYPE_MASK);
tree masktype = bestn->simdclone->args[mask_i].vector_type;
- callee_nelements = TYPE_VECTOR_SUBPARTS (masktype);
+ if (SCALAR_INT_MODE_P (bestn->simdclone->mask_mode))
+ /* Guess the number of lanes represented by masktype. */
+ callee_nelements = exact_div (bestn->simdclone->simdlen,
+ bestn->simdclone->nargs - nargs);
+ else
+ callee_nelements = TYPE_VECTOR_SUBPARTS (masktype);
o = vector_unroll_factor (nunits, callee_nelements);
for (m = j * o; m < (j + 1) * o; m++)
{
