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do not generate zero divisor checks if a divisor is a constant

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git-svn-id: trunk@27082 -
This commit is contained in:
Károly Balogh 2014-03-10 18:16:17 +00:00
parent 1e65caa37a
commit 075645d2b3
1 changed files with 16 additions and 12 deletions
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28
compiler/ncgmat.pas
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@ -382,19 +382,23 @@ implementation
{ purposes } { purposes }
hdenom := cg.getintregister(current_asmdata.CurrAsmList,OS_INT); hdenom := cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
hlcg.a_load_loc_reg(current_asmdata.CurrAsmList,right.resultdef,osuinttype,right.location,hdenom); hlcg.a_load_loc_reg(current_asmdata.CurrAsmList,right.resultdef,osuinttype,right.location,hdenom);
{ verify if the divisor is zero, if so return an error { verify if the divisor is zero, if so return an error immediately,
immediately except if we have a const node, where we don't need this, because
then zero check was done earlier.
} }
current_asmdata.getjumplabel(hl); if (right.nodetype <> ordconstn) then
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_NE,0,hdenom,hl); begin
paraloc1.init; current_asmdata.getjumplabel(hl);
pd:=search_system_proc('fpc_handleerror'); cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_NE,0,hdenom,hl);
paramanager.getintparaloc(pd,1,paraloc1); paraloc1.init;
cg.a_load_const_cgpara(current_asmdata.CurrAsmList,OS_S32,aint(200),paraloc1); pd:=search_system_proc('fpc_handleerror');
paramanager.freecgpara(current_asmdata.CurrAsmList,paraloc1); paramanager.getintparaloc(pd,1,paraloc1);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_HANDLEERROR',false); cg.a_load_const_cgpara(current_asmdata.CurrAsmList,OS_S32,aint(200),paraloc1);
paraloc1.done; paramanager.freecgpara(current_asmdata.CurrAsmList,paraloc1);
cg.a_label(current_asmdata.CurrAsmList,hl); cg.a_call_name(current_asmdata.CurrAsmList,'FPC_HANDLEERROR',false);
paraloc1.done;
cg.a_label(current_asmdata.CurrAsmList,hl);
end;
if nodetype = modn then if nodetype = modn then
emit_mod_reg_reg(is_signed(left.resultdef),hdenom,hreg1) emit_mod_reg_reg(is_signed(left.resultdef),hdenom,hreg1)
else else