Out-of-bounds writes could be eliminated per spec:
Section 5.11 (Out-of-Bounds Accesses) of the GLSL 4.60 spec says:
"In the subsections described above for array, vector, matrix and
structure accesses, any out-of-bounds access produced undefined
behavior.... Out-of-bounds writes may be discarded or overwrite
other variables of the active program."
Fixes:
1235850522cd5e7b07701f7065996430ca1514b6
Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6428>
info->constant_data = rzalloc_size(mem_ctx, var_size);
}
- char *dst = (char *)info->constant_data +
- nir_deref_instr_get_const_offset(deref, size_align);
+ const unsigned offset = nir_deref_instr_get_const_offset(deref, size_align);
+ if (offset >= info->constant_data_size)
+ return;
+
+ char *dst = (char *)info->constant_data + offset;
for (unsigned i = 0; i < num_components; i++) {
if (!(writemask & (1 << i)))