diff options
Diffstat (limited to 'gcc/config/alpha/alpha.c')
| -rw-r--r-- | gcc/config/alpha/alpha.c | 45 |
1 files changed, 30 insertions, 15 deletions
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c index f0795f3fa54..2b2971452a7 100644 --- a/gcc/config/alpha/alpha.c +++ b/gcc/config/alpha/alpha.c @@ -79,6 +79,10 @@ char *alpha_mlat_string; /* -mmemory-latency= */ rtx alpha_compare_op0, alpha_compare_op1; int alpha_compare_fp_p; +/* Define the information needed to modify the epilogue for EH. */ + +rtx alpha_eh_epilogue_sp_ofs; + /* Non-zero if inside of a function, because the Alpha asm can't handle .files inside of functions. */ @@ -2431,6 +2435,7 @@ void alpha_init_expanders () { alpha_return_addr_rtx = NULL_RTX; + alpha_eh_epilogue_sp_ofs = NULL_RTX; /* Arrange to save and restore machine status around nested functions. */ save_machine_status = alpha_save_machine_status; @@ -3731,9 +3736,13 @@ alpha_expand_epilogue () /* Restore registers in order, excepting a true frame pointer. */ - FRP (emit_move_insn (gen_rtx_REG (DImode, REG_RA), - gen_rtx_MEM (DImode, plus_constant(sa_reg, - reg_offset)))); + if (! alpha_eh_epilogue_sp_ofs) + { + FRP (emit_move_insn (gen_rtx_REG (DImode, REG_RA), + gen_rtx_MEM (DImode, + plus_constant(sa_reg, + reg_offset)))); + } reg_offset += 8; imask &= ~(1L << REG_RA); @@ -3763,21 +3772,28 @@ alpha_expand_epilogue () } } - if (frame_size) + if (frame_size || alpha_eh_epilogue_sp_ofs) { + sp_adj1 = stack_pointer_rtx; + + if (alpha_eh_epilogue_sp_ofs) + { + sp_adj1 = gen_rtx_REG (DImode, 23); + emit_move_insn (sp_adj1, + gen_rtx_PLUS (Pmode, stack_pointer_rtx, + alpha_eh_epilogue_sp_ofs)); + } + /* If the stack size is large, begin computation into a temporary register so as not to interfere with a potential fp restore, which must be consecutive with an SP restore. */ if (frame_size < 32768) - { - sp_adj1 = stack_pointer_rtx; - sp_adj2 = GEN_INT (frame_size); - } + sp_adj2 = GEN_INT (frame_size); else if (frame_size < 0x40007fffL) { int low = ((frame_size & 0xffff) ^ 0x8000) - 0x8000; - sp_adj2 = plus_constant (stack_pointer_rtx, frame_size - low); + sp_adj2 = plus_constant (sp_adj1, frame_size - low); if (sa_reg_exp && rtx_equal_p (sa_reg_exp, sp_adj2)) sp_adj1 = sa_reg; else @@ -3789,21 +3805,20 @@ alpha_expand_epilogue () } else { - sp_adj2 = gen_rtx_REG (DImode, 23); - FRP (sp_adj1 = alpha_emit_set_const (sp_adj2, DImode, frame_size, 3)); - if (!sp_adj1) + rtx tmp = gen_rtx_REG (DImode, 23); + FRP (sp_adj2 = alpha_emit_set_const (tmp, DImode, frame_size, 3)); + if (!sp_adj2) { /* We can't drop new things to memory this late, afaik, so build it up by pieces. */ #if HOST_BITS_PER_WIDE_INT == 64 - FRP (sp_adj1 = alpha_emit_set_long_const (sp_adj2, frame_size)); - if (!sp_adj1) + FRP (sp_adj2 = alpha_emit_set_long_const (tmp, frame_size)); + if (!sp_adj2) abort (); #else abort (); #endif } - sp_adj2 = stack_pointer_rtx; } /* From now on, things must be in order. So emit blockages. */ |