A TempleOS distro for heretics
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185 lines
5.7 KiB

Bool OptIC6(CIntermediateCode *tmpi)
{
CIntermediateCode *tmpil1;
if (tmpi->ic_code<IC_IMM_I64 || !(tmpil1=OptLag1(tmpi)))
return FALSE;
if (tmpil1->ic_code==IC_ADD_CONST && tmpi->ic_code==IC_DEREF &&
tmpi->ic_flags&ICF_ARG1_WAS_STK && tmpi->arg1.type&MDF_REG &&
tmpil1->res.type&MDF_REG && I32_MIN<=tmpil1->ic_data<=I32_MAX &&
!Bt(&cmp.non_ptr_vars_mask,tmpil1->arg1.reg)) {
if (tmpil1->arg1.type&MDF_REG) {
tmpi->ic_flags=tmpi->ic_flags&~ICF_ARG1_WAS_STK | tmpil1->ic_flags;
tmpi->ic_code=IC_MOV;
tmpi->arg1.type=MDF_DISP+tmpi->arg1_type_pointed_to;
tmpi->arg1.reg=tmpil1->arg1.reg;
tmpi->arg1.disp=tmpil1->ic_data;
OptSetNOP2(tmpil1,-1);
} else {
tmpil1->ic_code=IC_MOV;
tmpi->ic_code=IC_MOV;
tmpi->arg1.type=MDF_DISP+tmpi->arg1_type_pointed_to;
tmpi->arg1.disp=tmpil1->ic_data;
}
return TRUE;
}
return FALSE;
}
U0 OptPass6Lag(CCmpCtrl *cc,CPrsStk *ps,CIntermediateCode *tmpi,
I64 *_stk_ptr,I64 reg_stk_size,I64 *_clobbered_reg_mask)
{
I64 stk_ptr=*_stk_ptr,code,
clobbered_stk_tmp_mask,clobbered_reg_mask=*_clobbered_reg_mask;
CHashFun *tmpf;
code=tmpi->ic_code;
if (tmpi->ic_flags&ICF_PASS_TRACE && Bt(&cc->saved_pass_trace,6)) {
"%2d:",stk_ptr;
ICPut(cc,tmpi);
}
if (code==IC_CALL_START) {
if (reg_stk_size==1 && stk_ptr>0)
clobbered_stk_tmp_mask=REGG_STK_TMP;
else
clobbered_stk_tmp_mask=0;
if (tmpf=tmpi->ic_data) {
if (Bt(&tmpf->flags,Ff_INTERNAL))
clobbered_stk_tmp_mask=0;
else {
clobbered_stk_tmp_mask&=tmpf->clobbered_reg_mask;
clobbered_reg_mask|=tmpf->clobbered_reg_mask;
}
}
tmpi->ic_data=clobbered_stk_tmp_mask;
PrsPush(ps,stk_ptr);
PrsPush(ps,clobbered_stk_tmp_mask);
} else if (code==IC_CALL_END) {
tmpi->ic_data=PrsPop(ps);
stk_ptr=PrsPop(ps);
} else if (code==IC_CALL_END2) {
ps->ptr--;
stk_ptr=PrsPop(ps);
}
if (intermediate_code_table[code].arg_cnt==IS_V_ARG)
stk_ptr-=tmpi->ic_data>>3;
if (tmpi->arg2.type&MDF_STK) {
stk_ptr--;
if (stk_ptr<reg_stk_size) {
tmpi->arg2.type=MDF_REG+tmpi->arg2.type.raw_type;
tmpi->arg2.reg=Bsf(REGG_STK_TMP);
tmpi->arg2.disp=0;
}
}
if (tmpi->arg1.type&MDF_STK) {
stk_ptr--;
if (stk_ptr<reg_stk_size) {
tmpi->arg1.type=MDF_REG+tmpi->arg1.type.raw_type;
tmpi->arg1.reg=Bsf(REGG_STK_TMP);
tmpi->arg1.disp=0;
}
}
if (tmpi->res.type&MDF_STK && !(tmpi->ic_flags & ICF_PUSH_RES)) {
stk_ptr++;
if (stk_ptr<=reg_stk_size) {
tmpi->res.type=MDF_REG+tmpi->res.type.raw_type;
tmpi->res.reg=Bsf(REGG_STK_TMP);
clobbered_reg_mask|=REGG_STK_TMP;
tmpi->res.disp=0;
}
}
while (OptIC6(tmpi));
if (tmpi->res.type.raw_type!=RT_F64 && !(tmpi->ic_flags&ICF_USE_F64))
tmpi->ic_flags|=ICF_USE_INT;
*_stk_ptr=stk_ptr;
*_clobbered_reg_mask=clobbered_reg_mask;
}
U0 OptPass6(CCmpCtrl *cc)
{
CIntermediateCode *tmpi,*tmpi_next,*tmpil1,*tmpil2,*old_tmpil2;
I64 stk_ptr=0,reg_stk_size,clobbered_reg_mask=REGG_CLOBBERED;
CPrsStk *ps=cc->ps;
ps->ptr=0;
ps->ptr2=0;
if (Bt(&cc->opts,OPTf_NO_REG_VAR) || cc->flags&CCF_NO_REG_OPT)
reg_stk_size=0;
else
reg_stk_size=1;
#assert REGG_STK_TMP==1<<9
tmpi=cc->coc.coc_head.next;
old_tmpil2=NULL;
tmpil1=tmpil2=&cmp.ic_nop;
while (tmpi->ic_code) {
if (tmpi->ic_code>IC_NOP2) {
if (tmpil1->ic_code>IC_NOP2)
tmpil2=tmpil1;
tmpil1=tmpi;
if (tmpi->arg2.type&MDF_STK) {
if (tmpil2->res.type&MDF_STK &&
!(tmpil2->ic_flags&ICF_PUSH_RES)) {
if (tmpi->ic_code==IC_ASSIGN && tmpi->ic_flags&ICF_BY_VAL &&
tmpi->ic_flags&ICF_RES_NOT_USED &&
tmpil2->ic_code!=IC_CALL_END &&
tmpil2->ic_code!=IC_CALL_END2 &&
tmpil2->ic_code!=IC_SET_RAX &&
!(tmpi->ic_flags&(ICF_ARG2_TO_F64|ICF_ARG2_TO_INT)) &&
!(tmpil2->ic_flags&(ICF_RES_TO_F64|ICF_RES_TO_INT))) {
tmpil2->res.type =tmpi->arg1.type&MDG_MASK+
tmpi->arg1_type_pointed_to;
tmpil2->res.reg =tmpi->arg1.reg;
tmpil2->res.disp =tmpi->arg1.disp;
tmpil2->ic_flags=tmpil2->ic_flags
&~(ICF_RES_NOT_USED|ICF_RES_WAS_STK)
|tmpi->ic_flags&~(ICF_BY_VAL|ICF_ARG1_WAS_STK|ICF_ARG2_WAS_STK);
old_tmpil2=NULL;
OptSetNOP1(tmpi);
} else {
tmpi->arg2.type=MDF_REG+tmpi->arg2.type.raw_type;
tmpi->arg2.reg=REG_RAX;
tmpi->arg2.disp=0;
tmpil2->res.type=MDF_REG+tmpil2->res.type.raw_type;
tmpil2->res.reg=REG_RAX;
tmpil2->res.disp=0;
}
}
} else if (tmpi->arg1.type&MDF_STK && tmpil2->res.type&MDF_STK &&
!(tmpil2->ic_flags&ICF_PUSH_RES)) {
tmpi->arg1.type=MDF_REG+tmpi->arg1.type.raw_type;
tmpi->arg1.disp=0;
tmpil2->res.type=MDF_REG+tmpil2->res.type.raw_type;
tmpil2->res.disp=0;
if (intermediate_code_table[tmpi->ic_code].arg_cnt==IS_2_ARG) {
tmpi->arg1.reg=REG_R8;
tmpil2->res.reg=REG_R8;
} else {
tmpi->arg1.reg=REG_RAX;
tmpil2->res.reg=REG_RAX;
}
}
if (tmpi->ic_flags & ICF_PUSH_RES)
tmpi->res.type==MDF_STK+tmpi->res.type.raw_type;
if (old_tmpil2!=tmpil2) {
if (tmpil2->ic_code>IC_NOP2)
OptPass6Lag(cc,ps,tmpil2,&stk_ptr,reg_stk_size,&clobbered_reg_mask);
old_tmpil2=tmpil2;
}
}
tmpi_next=tmpi->next;
if (tmpi->ic_code<=IC_NOP2)
OptFree(tmpi);
tmpi=tmpi_next;
}
if (ps->ptr>2) {
"Pass:%d Stk:%08X\n",cc->pass,ps->ptr;
LexExcept(cc,"Compiler Optimization Error at ");
}
if (cc->htc.fun) {
cc->htc.fun->used_reg_mask&=~REGG_STK_TMP;
cc->htc.fun->used_reg_mask|=clobbered_reg_mask;
cc->htc.fun->clobbered_reg_mask=clobbered_reg_mask;
if (Bt(&cc->flags,CCf_PASS_TRACE_PRESENT) &&
Bt(&cc->saved_pass_trace,6)) {
"Used Reg Mask:%04X\n",cc->htc.fun->used_reg_mask;
"Clobbered Reg Mask:%04X\n",clobbered_reg_mask;
}
}
}