diff options
Diffstat (limited to 'gcc/regclass.c')
| -rw-r--r-- | gcc/regclass.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/gcc/regclass.c b/gcc/regclass.c index b16a677d805..9d1fe55b4b5 100644 --- a/gcc/regclass.c +++ b/gcc/regclass.c @@ -94,6 +94,18 @@ HARD_REG_SET losing_caller_save_reg_set; /* Data for initializing the above. */ static char initial_call_used_regs[] = CALL_USED_REGISTERS; + +/* This is much like call_used_regs, except it doesn't have to + be a superset of FIXED_REGISTERS. This vector indicates + what is really call clobbered, and is used when defining + regs_invalidated_by_call. */ + +char call_really_used_regs[] = +#ifdef CALL_REALLY_USED_REGISTERS + CALL_REALLY_USED_REGISTERS; +#else + CALL_USED_REGISTERS; +#endif /* Indexed by hard register number, contains 1 for registers that are fixed use or call used registers that cannot hold quantities across @@ -464,7 +476,7 @@ init_reg_sets_1 () else if (i == PIC_OFFSET_TABLE_REGNUM && flag_pic) ; #endif - else if (call_used_regs[i] || global_regs[i]) + else if (call_really_used_regs[i] || global_regs[i]) SET_HARD_REG_BIT (regs_invalidated_by_call, i); } @@ -747,6 +759,8 @@ fix_register (name, fixed, call_used) { fixed_regs[i] = fixed; call_used_regs[i] = call_used; + if (fixed == 0) + call_really_used_regs[i] = call_used; } } else |