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References to the stack frame are now rendered properly.

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This commit is contained in:
David Given 2016-10-15 23:33:30 +02:00
parent a8ee82d197
commit b36897c299
3 changed files with 20 additions and 10 deletions
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12
mach/proto/mcg/hop.c
View file

@ -227,15 +227,15 @@ char* hop_render(struct hop* hop)
break;
case INSEL_ST_OFFSET:
appendf("(st+%d)", insel->u.hreg->offset);
appendf("%d", current_proc->fp_to_st + insel->u.hreg->offset);
break;
case INSEL_AB_OFFSET:
appendf("(ab+%d)", insel->u.offset);
appendf("%d", current_proc->fp_to_ab + insel->u.offset);
break;
case INSEL_LB_OFFSET:
appendf("(lb+%d)", insel->u.offset);
appendf("%d", current_proc->fp_to_lb + insel->u.offset);
break;
case INSEL_VALUE:
@ -252,6 +252,12 @@ char* hop_render(struct hop* hop)
break;
case IR_LOCAL:
if (ir->u.ivalue >= 0)
appendf("%d", current_proc->fp_to_ab + ir->u.ivalue);
else
appendf("%d", current_proc->fp_to_lb + ir->u.ivalue);
break;
case IR_CONST:
appendf("%d", ir->u.ivalue);
break;

16
mach/proto/mcg/powerpc.c
View file

@ -3,21 +3,22 @@
/* mcg stack frames are laid out as:
*
* | ...params...
* | --------------- <- ap
* | --------------- <- ab
* | saved regs
* | --------------- <- st
* | ---------------
* | spills
* | --------------- <- fp (a.k.a. lb)
* | --------------- <- st, fp (a.k.a. lb)
* | locals
* | --------------- <- sp
* V ...user area...
*
* st indexes up; lb indexes down.
*/
void platform_calculate_offsets(void)
{
current_proc->fp_to_st = current_proc->spills_size;
current_proc->fp_to_ap = current_proc->fp_to_st + current_proc->saved_size + 8;
current_proc->fp_to_st = 0;
current_proc->fp_to_ab = current_proc->spills_size + current_proc->saved_size + 8;
current_proc->fp_to_lb = 0;
}
@ -25,7 +26,10 @@ struct hop* platform_prologue(void)
{
struct hop* hop = new_hop(current_proc->entry, NULL);
hop_add_insel(hop, "addi sp, sp, %d", current_proc->fp_to_ap + current_proc->locals_size);
hop_add_insel(hop, "! saved_size = %d+8 bytes", current_proc->saved_size);
hop_add_insel(hop, "! spills_size = %d bytes", current_proc->spills_size);
hop_add_insel(hop, "! locals_size = %d bytes", current_proc->locals_size);
hop_add_insel(hop, "addi sp, sp, %d", -(current_proc->fp_to_ab + current_proc->locals_size));
hop_add_insel(hop, "mfspr 0, lr");
hop_add_insel(hop, "stw fp, %d(sp)", current_proc->fp_to_st + current_proc->locals_size);
hop_add_insel(hop, "stw 0, %d(sp)", current_proc->fp_to_st + current_proc->locals_size + 4);

2
mach/proto/mcg/procedure.h
View file

@ -17,7 +17,7 @@ struct procedure
int spills_size;
int saved_size;
int fp_to_st;
int fp_to_ap;
int fp_to_ab;
int fp_to_lb;
ARRAYOF(struct basicblock) blocks;
IMAPOF(struct local) locals;