[Bug c/123162] ICE: tree check: expected class 'type', have 'exceptional' (error_mark) in types_match, at generic-match-head.cc:63 with -Wlogical-op -mno-sse2 and __bf16

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123162

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> (gdb) p debug_tree(lhs)
>  <cond_expr 0x7ffff781c1b0
>     type <integer_type 0x7ffff781d5e8 int public SI
>         size <integer_cst 0x7ffff781f1b0 constant 32>
>         unit-size <integer_cst 0x7ffff781f1c8 constant 4>
>         align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
> 0x7ffff781d5e8 precision:32 min <integer_cst 0x7ffff781f168 -2147483648> max
> <integer_cst 0x7ffff781f180 2147483647>
>         pointer_to_this <pointer_type 0x7ffff7825b28>>
> 
>     arg:0 <integer_cst 0x7ffff781f300 type <integer_type 0x7ffff781d5e8 int>
> constant 0> arg:1 <integer_cst 0x7ffff781f300 0> arg:2 <error_mark
> 0x7ffff7802f48>
>     t9.c:4:3 start: t9.c:4:3 finish: t9.c:4:11>
> 
> 
> The bug is in parser_build_binary_op I think.

Sorry build_conditional_expr.

This fixes the issue for me:
diff --git a/gcc/c/c-typeck.cc b/gcc/c/c-typeck.cc
index cab21e29004..68ff223d093 100644
--- a/gcc/c/c-typeck.cc
+++ b/gcc/c/c-typeck.cc
@@ -6942,7 +6942,10 @@ build_conditional_expr (location_t colon_loc, tree
ifexp, bool ifexp_bcp,
          op1 = c_fully_fold (op1, false, NULL);
          op2 = c_fully_fold (op2, false, NULL);
        }
-      ret = build3 (COND_EXPR, result_type, ifexp, op1, op2);
+      if (op1 == error_mark_node || op2 == error_mark_node)
+       ret = error_mark_node;
+      else
+        ret = build3 (COND_EXPR, result_type, ifexp, op1, op2);
       if (int_operands)
        ret = note_integer_operands (ret);
     }