diff options
Diffstat (limited to 'gcc/ira.c')
| -rw-r--r-- | gcc/ira.c | 52 |
1 files changed, 50 insertions, 2 deletions
@@ -380,7 +380,7 @@ along with GCC; see the file COPYING3. If not see #include "except.h" #include "reload.h" #include "diagnostic-core.h" -#include "integrate.h" +#include "function.h" #include "ggc.h" #include "ira-int.h" #include "dce.h" @@ -4034,7 +4034,55 @@ move_unallocated_pseudos (void) } } +/* If the backend knows where to allocate pseudos for hard + register initial values, register these allocations now. */ +void +allocate_initial_values (void) +{ + if (targetm.allocate_initial_value) + { + rtx hreg, preg, x; + int i, regno; + + for (i = 0; HARD_REGISTER_NUM_P (i); i++) + { + if (! initial_value_entry (i, &hreg, &preg)) + break; + + x = targetm.allocate_initial_value (hreg); + regno = REGNO (preg); + if (x && REG_N_SETS (regno) <= 1) + { + if (MEM_P (x)) + reg_equiv_memory_loc (regno) = x; + else + { + basic_block bb; + int new_regno; + + gcc_assert (REG_P (x)); + new_regno = REGNO (x); + reg_renumber[regno] = new_regno; + /* Poke the regno right into regno_reg_rtx so that even + fixed regs are accepted. */ + SET_REGNO (preg, new_regno); + /* Update global register liveness information. */ + FOR_EACH_BB (bb) + { + if (REGNO_REG_SET_P(df_get_live_in (bb), regno)) + SET_REGNO_REG_SET (df_get_live_in (bb), new_regno); + if (REGNO_REG_SET_P(df_get_live_out (bb), regno)) + SET_REGNO_REG_SET (df_get_live_out (bb), new_regno); + } + } + } + } + gcc_checking_assert (! initial_value_entry (FIRST_PSEUDO_REGISTER, + &hreg, &preg)); + } +} + /* All natural loops. */ struct loops ira_loops; @@ -4239,7 +4287,7 @@ ira (FILE *f) memset (ira_spilled_reg_stack_slots, 0, max_regno * sizeof (struct ira_spilled_reg_stack_slot)); } - allocate_initial_values (reg_equivs); + allocate_initial_values (); /* See comment for find_moveable_pseudos call. */ if (ira_conflicts_p) |