[Bug target/118795] [15 Regression] ICE when building darkradiant-3.9.0 (with PCH?) (expand_expr_real_2, at expr.cc:10975)

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118795

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
For reference, the following fixes the ICE (more "latent" issues with permute
support queries elsewhere I bet).

diff --git a/gcc/match.pd b/gcc/match.pd
index ad966766376..c0402e81c28 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -11128,7 +11128,7 @@ and,
     (with
      {
        vec_perm_indices sel0 (builder0, 2, nelts);
-       vec_perm_indices sel1 (builder1, 1, nelts);
+       vec_perm_indices sel1 (builder1, 2, nelts);

        for (int i = 0; i < nelts; i++)
         builder2.quick_push (sel0[sel1[i].to_constant ()]);