diff options
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index 9c7a22e..78c3073 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -290,7 +290,7 @@ static struct insn_chain *insns_need_reload; in favor of another. If there is more than one way of eliminating a particular register, the most preferred should be specified first. */ -static struct elim_table +struct elim_table { int from; /* Register number to be eliminated. */ int to; /* Register number used as replacement. */ @@ -307,7 +307,17 @@ static struct elim_table register corresponding to a pseudo assigned to the reg to be eliminated. */ rtx to_rtx; /* REG rtx for the replacement. */ -} reg_eliminate[] = +}; + +static struct elim_table * reg_eliminate = 0; + +/* This is an intermediate structure to initialize the table. It has + exactly the members provided by ELIMINABLE_REGS. */ +static struct elim_table_1 +{ + int from; + int to; +} reg_eliminate_1[] = /* If a set of eliminable registers was specified, define the table from it. Otherwise, default to the normal case of the frame pointer being @@ -319,7 +329,7 @@ static struct elim_table {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}; #endif -#define NUM_ELIMINABLE_REGS (sizeof reg_eliminate / sizeof reg_eliminate[0]) +#define NUM_ELIMINABLE_REGS (sizeof reg_eliminate_1/sizeof reg_eliminate_1[0]) /* Record the number of pending eliminations that have an offset not equal to their initial offset. If non-zero, we use a new copy of each @@ -3611,7 +3621,18 @@ static void init_elim_table () { struct elim_table *ep; +#ifdef ELIMINABLE_REGS + struct elim_table_1 *ep1; +#endif + if (!reg_eliminate) + { + reg_eliminate = (struct elim_table *) + xmalloc(sizeof(struct elim_table) * NUM_ELIMINABLE_REGS); + bzero ((PTR) reg_eliminate, + sizeof(struct elim_table) * NUM_ELIMINABLE_REGS); + } + /* Does this function require a frame pointer? */ frame_pointer_needed = (! flag_omit_frame_pointer @@ -3629,13 +3650,18 @@ init_elim_table () num_eliminable = 0; #ifdef ELIMINABLE_REGS - for (ep = reg_eliminate; ep < ®_eliminate[NUM_ELIMINABLE_REGS]; ep++) + for (ep = reg_eliminate, ep1 = reg_eliminate_1; + ep < ®_eliminate[NUM_ELIMINABLE_REGS]; ep++, ep1++) { + ep->from = ep1->from; + ep->to = ep1->to; ep->can_eliminate = ep->can_eliminate_previous = (CAN_ELIMINATE (ep->from, ep->to) && ! (ep->to == STACK_POINTER_REGNUM && frame_pointer_needed)); } #else + reg_eliminate[0].from = reg_eliminate_1[0].from; + reg_eliminate[0].to = reg_eliminate_1[0].to; reg_eliminate[0].can_eliminate = reg_eliminate[0].can_eliminate_previous = ! frame_pointer_needed; #endif |