re PR tree-optimization/32821 (tree-if-conv:combine_blocks with -ftree-dump-tree-all-details fails on ICE in compilation: segfault)

	PR tree-optimization/32821
	* tree_if_conv.c (combine_blocks): Use alloc_stmt_list instead of
	NULL in the call to set_bb_stmt_list.

testsuite/ChangeLog:

	PR tree-optimization/32821
	* gcc.dg/tree-ssa/pr32821.c: New file.

From-SVN: r128235