diff options
Diffstat (limited to 'gcc/global.c')
| -rw-r--r-- | gcc/global.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/gcc/global.c b/gcc/global.c index 471e42e8fd9..0840b87b191 100644 --- a/gcc/global.c +++ b/gcc/global.c @@ -130,6 +130,11 @@ struct allocno /* Set of hard registers that some later allocno has a preference for. */ HARD_REG_SET regs_someone_prefers; + +#ifdef STACK_REGS + /* Set to true if allocno can't be allocated in the stack register. */ + bool no_stack_reg; +#endif }; static struct allocno *allocno; @@ -706,8 +711,14 @@ global_conflicts () if (e->flags & EDGE_ABNORMAL) break; if (e != NULL) - for (ax = FIRST_STACK_REG; ax <= LAST_STACK_REG; ax++) - record_one_conflict (ax); + { + EXECUTE_IF_SET_IN_ALLOCNO_SET (allocnos_live, ax, + { + allocno[ax].no_stack_reg = 1; + }); + for (ax = FIRST_STACK_REG; ax <= LAST_STACK_REG; ax++) + record_one_conflict (ax); + } } #endif } @@ -1204,6 +1215,10 @@ find_reg (num, losers, alt_regs_p, accept_call_clobbered, retrying) && ! invalid_mode_change_p (regno, REGNO_REG_CLASS (regno), mode) #endif +#ifdef STACK_REGS + && (!allocno[num].no_stack_reg + || regno < FIRST_STACK_REG || regno > LAST_STACK_REG) +#endif ) { /* We explicitly evaluate the divide results into temporary |