diff options
Diffstat (limited to 'gcc/integrate.c')
| -rw-r--r-- | gcc/integrate.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/integrate.c b/gcc/integrate.c index 4bbfcea..ead6d31 100644 --- a/gcc/integrate.c +++ b/gcc/integrate.c @@ -2062,7 +2062,17 @@ copy_rtx_and_substitute (orig, map, for_lhs) RTX_UNCHANGING_P (map->reg_map[regno]) = RTX_UNCHANGING_P (temp); /* A reg with REG_FUNCTION_VALUE_P true will never reach here. */ - if (REG_POINTER (map->x_regno_reg_rtx[regno])) + /* Objects may initially be represented as registers, but + but turned into a MEM if their address is taken by + put_var_into_stack. Therefore, the register table may have + entries which are MEMs. + + We briefly tried to clear such entries, but that ended up + cascading into many changes due to the optimizers not being + prepared for empty entries in the register table. So we've + decided to allow the MEMs in the register table for now. */ + if (REG_P (map->x_regno_reg_rtx[regno]) + && REG_POINTER (map->x_regno_reg_rtx[regno])) mark_reg_pointer (map->reg_map[regno], map->regno_pointer_align[regno]); regno = REGNO (map->reg_map[regno]); |