diff options
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index 7961c99..d4141be 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -5589,6 +5589,15 @@ choose_reload_regs (struct insn_chain *chain) gcc_assert (GET_CODE (equiv) == SUBREG); regno = subreg_regno (equiv); equiv = gen_rtx_REG (rld[r].mode, regno); + /* If we choose EQUIV as the reload register, but the + loop below decides to cancel the inheritance, we'll + end up reloading EQUIV in rld[r].mode, not the mode + it had originally. That isn't safe when EQUIV isn't + available as a spill register since its value might + still be live at this point. */ + for (i = regno; i < regno + (int) rld[r].nregs; i++) + if (TEST_HARD_REG_BIT (reload_reg_unavailable, i)) + equiv = 0; } } |