diff options
Diffstat (limited to 'gcc/ra.c')
| -rw-r--r-- | gcc/ra.c | 20 |
1 files changed, 19 insertions, 1 deletions
@@ -148,6 +148,7 @@ HARD_REG_SET never_use_colors; HARD_REG_SET usable_regs[N_REG_CLASSES]; unsigned int num_free_regs[N_REG_CLASSES]; HARD_REG_SET hardregs_for_mode[NUM_MACHINE_MODES]; +HARD_REG_SET invalid_mode_change_regs; unsigned char byte2bitcount[256]; unsigned int debug_new_regalloc = -1; @@ -555,6 +556,23 @@ init_ra () COPY_HARD_REG_SET (hardregs_for_mode[i], rs); } + CLEAR_HARD_REG_SET (invalid_mode_change_regs); +#ifdef CANNOT_CHANGE_MODE_CLASS + if (0) + for (i = 0; i < NUM_MACHINE_MODES; i++) + { + enum machine_mode from = (enum machine_mode) i; + enum machine_mode to; + for (to = VOIDmode; to < MAX_MACHINE_MODE; ++to) + { + int r; + for (r = 0; r < FIRST_PSEUDO_REGISTER; r++) + if (REG_CANNOT_CHANGE_MODE_P (from, to, r)) + SET_HARD_REG_BIT (invalid_mode_change_regs, r); + } + } +#endif + for (an_unusable_color = 0; an_unusable_color < FIRST_PSEUDO_REGISTER; an_unusable_color++) if (TEST_HARD_REG_BIT (never_use_colors, an_unusable_color)) @@ -755,7 +773,7 @@ reg_alloc () chains per insn, and per regno. In later passes only update that info from the new and modified insns. */ df_analyse (df, (ra_pass == 1) ? 0 : (bitmap) -1, - DF_HARD_REGS | DF_RD_CHAIN | DF_RU_CHAIN); + DF_HARD_REGS | DF_RD_CHAIN | DF_RU_CHAIN | DF_FOR_REGALLOC); if ((debug_new_regalloc & DUMP_DF) != 0) { |