diff options
Diffstat (limited to 'gcc/config/sh/sh.c')
| -rw-r--r-- | gcc/config/sh/sh.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c index 53f8b12..29a657b 100644 --- a/gcc/config/sh/sh.c +++ b/gcc/config/sh/sh.c @@ -3959,6 +3959,8 @@ calc_live_regs (count_ptr, live_regs_mask2) int live_regs_mask = 0; int count; int interrupt_handler; + rtx pr_initial; + int pr_live; if ((lookup_attribute ("interrupt_handler", @@ -3979,14 +3981,20 @@ calc_live_regs (count_ptr, live_regs_mask2) target_flags &= ~FPU_SINGLE_BIT; break; } + pr_initial = has_hard_reg_initial_val (Pmode, PR_REG); + pr_live = (pr_initial + ? REGNO (pr_initial) != PR_REG + : regs_ever_live[PR_REG]); for (count = 0, reg = FIRST_PSEUDO_REGISTER - 1; reg >= 0; reg--) { - if ((interrupt_handler && ! pragma_trapa) + if (reg == PR_REG + ? pr_live + : (interrupt_handler && ! pragma_trapa) ? (/* Need to save all the regs ever live. */ (regs_ever_live[reg] || (call_used_regs[reg] && (! fixed_regs[reg] || reg == MACH_REG || reg == MACL_REG) - && regs_ever_live[PR_REG])) + && pr_live)) && reg != STACK_POINTER_REGNUM && reg != ARG_POINTER_REGNUM && reg != RETURN_ADDRESS_POINTER_REGNUM && reg != T_REG && reg != GBR_REG && reg != FPSCR_REG) @@ -4598,7 +4606,7 @@ initial_elimination_offset (from, to) if (from == RETURN_ADDRESS_POINTER_REGNUM && (to == FRAME_POINTER_REGNUM || to == STACK_POINTER_REGNUM)) - return UNITS_PER_WORD + total_auto_space; + return total_auto_space; abort (); } @@ -5638,3 +5646,13 @@ sh_adjust_cost (insn, link, dep_insn, cost) return cost; } + +/* For use by ALLOCATE_INITIAL_VALUE. Note that sh.md contains some + 'special function' patterns (type sfunc) that clobber pr, but that + do not look like function calls to leaf_function_p. Hence we must + do this extra check. */ +int +sh_pr_n_sets () +{ + return REG_N_SETS (PR_REG); +} |