[gcc r12-2350] tree-optimization/101467 - fix make_temp_ssa_name usage

[gcc r12-2350] tree-optimization/101467 - fix make_temp_ssa_name usage

[Richard Biener]

https://gcc.gnu.org/g:df0d7486ec9bca8a77ca106d9fbb60f819dd9cec

commit r12-2350-gdf0d7486ec9bca8a77ca106d9fbb60f819dd9cec
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Jul 16 11:17:37 2021 +0200

    tree-optimization/101467 - fix make_temp_ssa_name usage
    
    My previous change to vect_gen_while introduced paths which call
    make_temp_ssa_name with a NULL name which isn't supported.  The
    following fixes that.
    
    2021-07-16  Richard Biener  <rguenther@suse.de>
    
            PR tree-optimization/101467
            * tree-vect-stmts.c (vect_gen_while): Properly guard
            make_temp_ssa_name usage.

Diff:
---
 gcc/tree-vect-stmts.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index ec82acb8db9..0ef46962618 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -11999,7 +11999,11 @@ vect_gen_while (gimple_seq *seq, tree mask_type, tree start_index,
   gcall *call = gimple_build_call_internal (IFN_WHILE_ULT, 3,
 					    start_index, end_index,
 					    build_zero_cst (mask_type));
-  tree tmp = make_temp_ssa_name (mask_type, NULL, name);
+  tree tmp;
+  if (name)
+    tmp = make_temp_ssa_name (mask_type, NULL, name);
+  else
+    tmp = make_ssa_name (mask_type);
   gimple_call_set_lhs (call, tmp);
   gimple_seq_add_stmt (seq, call);
   return tmp;