[gcc r13-4385] tree-optimization/107898 - ICE with -Walloca-larger-than

[Richard Biener <rguenth@gcc.gnu.org>]

https://gcc.gnu.org/g:9948daa4fd0f0ea0a9d56c2fefe1bca478554d27

commit r13-4385-g9948daa4fd0f0ea0a9d56c2fefe1bca478554d27
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Nov 29 09:03:46 2022 +0100

    tree-optimization/107898 - ICE with -Walloca-larger-than
    
    The following avoids ICEing with a mismatched prototype for alloca
    and -Walloca-larger-than using irange for checks which doesn't
    like mismatched types.
    
            PR tree-optimization/107898
            * gimple-ssa-warn-alloca.cc (alloca_call_type): Check
            the type of the alloca argument is compatible with size_t
            before querying ranges.

Diff:
---
 gcc/gimple-ssa-warn-alloca.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/gimple-ssa-warn-alloca.cc b/gcc/gimple-ssa-warn-alloca.cc
index 83a241a3a4b..dcc62ca77bf 100644
--- a/gcc/gimple-ssa-warn-alloca.cc
+++ b/gcc/gimple-ssa-warn-alloca.cc
@@ -217,6 +217,7 @@ alloca_call_type (gimple *stmt, bool is_vla)
   int_range_max r;
   if (warn_limit_specified_p (is_vla)
       && TREE_CODE (len) == SSA_NAME
+      && types_compatible_p (TREE_TYPE (len), size_type_node)
       && get_range_query (cfun)->range_of_expr (r, len, stmt)
       && !r.varying_p ())
     {