diff options
Diffstat (limited to 'gcc/ira.c')
| -rw-r--r-- | gcc/ira.c | 23 |
1 files changed, 8 insertions, 15 deletions
@@ -1397,14 +1397,12 @@ insn_contains_asm (rtx insn) return for_each_rtx (&insn, insn_contains_asm_1, NULL); } -/* Set up regs_asm_clobbered. */ +/* Add register clobbers from asm statements. */ static void -compute_regs_asm_clobbered (char *regs_asm_clobbered) +compute_regs_asm_clobbered (void) { basic_block bb; - memset (regs_asm_clobbered, 0, sizeof (char) * FIRST_PSEUDO_REGISTER); - FOR_EACH_BB (bb) { rtx insn; @@ -1425,7 +1423,7 @@ compute_regs_asm_clobbered (char *regs_asm_clobbered) + hard_regno_nregs[dregno][mode] - 1; for (i = dregno; i <= end; ++i) - regs_asm_clobbered[i] = 1; + SET_HARD_REG_BIT(crtl->asm_clobbers, i); } } } @@ -1437,12 +1435,6 @@ compute_regs_asm_clobbered (char *regs_asm_clobbered) void ira_setup_eliminable_regset (void) { - /* Like regs_ever_live, but 1 if a reg is set or clobbered from an - asm. Unlike regs_ever_live, elements of this array corresponding - to eliminable regs (like the frame pointer) are set if an asm - sets them. */ - char *regs_asm_clobbered - = (char *) alloca (FIRST_PSEUDO_REGISTER * sizeof (char)); #ifdef ELIMINABLE_REGS int i; static const struct {const int from, to; } eliminables[] = ELIMINABLE_REGS; @@ -1466,7 +1458,8 @@ ira_setup_eliminable_regset (void) COPY_HARD_REG_SET (ira_no_alloc_regs, no_unit_alloc_regs); CLEAR_HARD_REG_SET (eliminable_regset); - compute_regs_asm_clobbered (regs_asm_clobbered); + compute_regs_asm_clobbered (); + /* Build the regset of all eliminable registers and show we can't use those that we already know won't be eliminated. */ #ifdef ELIMINABLE_REGS @@ -1476,7 +1469,7 @@ ira_setup_eliminable_regset (void) = (! targetm.can_eliminate (eliminables[i].from, eliminables[i].to) || (eliminables[i].to == STACK_POINTER_REGNUM && need_fp)); - if (! regs_asm_clobbered[eliminables[i].from]) + if (!TEST_HARD_REG_BIT (crtl->asm_clobbers, eliminables[i].from)) { SET_HARD_REG_BIT (eliminable_regset, eliminables[i].from); @@ -1490,7 +1483,7 @@ ira_setup_eliminable_regset (void) df_set_regs_ever_live (eliminables[i].from, true); } #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM - if (! regs_asm_clobbered[HARD_FRAME_POINTER_REGNUM]) + if (!TEST_HARD_REG_BIT (crtl->asm_clobbers, HARD_FRAME_POINTER_REGNUM)) { SET_HARD_REG_BIT (eliminable_regset, HARD_FRAME_POINTER_REGNUM); if (need_fp) @@ -1504,7 +1497,7 @@ ira_setup_eliminable_regset (void) #endif #else - if (! regs_asm_clobbered[FRAME_POINTER_REGNUM]) + if (!TEST_HARD_REG_BIT (crtl->asm_clobbers, HARD_FRAME_POINTER_REGNUM)) { SET_HARD_REG_BIT (eliminable_regset, FRAME_POINTER_REGNUM); if (need_fp) |