diff options
Diffstat (limited to 'gcc/regmove.c')
| -rw-r--r-- | gcc/regmove.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/regmove.c b/gcc/regmove.c index e3b6cf9970e..cbbeb835c7e 100644 --- a/gcc/regmove.c +++ b/gcc/regmove.c @@ -146,6 +146,16 @@ try_auto_increment (insn, inc_insn, inc_insn_set, reg, increment, pre) gen_rtx_fmt_e (inc_code, Pmode, reg), 1); if (apply_change_group ()) { + /* If there is a REG_DEAD note on this insn, we must + change this not to REG_UNUSED meaning that the register + is set, but the value is dead. Failure to do so will + result in a sched1 abort -- when it recomputes lifetime + information, the number of REG_DEAD notes will have + changed. */ + rtx note = find_reg_note (insn, REG_DEAD, reg); + if (note) + PUT_MODE (note, REG_UNUSED); + REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_INC, reg, REG_NOTES (insn)); |