https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95210
--- Comment #1 from zhongyunde at tom dot com <zhongyunde at tom dot com> --- patch for this issue. @ linux-9z2e in ~/software/gcc/gcc on git:master o [23:02:26] $ git diff diff --git a/gcc/gcse.c b/gcc/gcse.c index 8b9518e..65982ec 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -853,7 +853,7 @@ can_assign_to_reg_without_clobbers_p (rtx x, machine_mode mode) { test_insn = make_insn_raw (gen_rtx_SET (gen_rtx_REG (word_mode, - FIRST_PSEUDO_REGISTER * 2), + max_regno + 1), const0_rtx));