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+ AndLslXsr2And and AndLsl2Lsl optimization

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git-svn-id: trunk@23458 -
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florian 2013-01-20 14:57:46 +00:00
parent ff522d7e18
commit a78af5b8fe
1 changed files with 67 additions and 1 deletions
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68
compiler/arm/aoptcpu.pas
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@ -764,7 +764,7 @@ Implementation
mov reg1,reg1, shift imm2
mov reg1,reg1, shift imm3 ...
}
else if GetNextInstructionUsingReg(hp1,hp2, taicpu(p).oper[0]^.reg) and
else if GetNextInstructionUsingReg(hp1,hp2, taicpu(p).oper[0]^.reg) and
(assigned(FindRegDealloc(taicpu(p).oper[0]^.reg,tai(hp2.Next))) or
regLoadedWithNewValue(taicpu(p).oper[0]^.reg, hp2)) and
MatchInstruction(hp2, A_MOV, [taicpu(p).condition], [PF_None]) and
@ -1219,6 +1219,72 @@ Implementation
asml.remove(p);
p.free;
p:=hp1;
end
{
from
and reg1,reg0,2^n-1
mov reg2,reg1, lsl imm1
(mov reg3,reg2, lsr/asr imm1)
remove either the and or the lsl/xsr sequence if possible
}
else if cutils.ispowerof2(taicpu(p).oper[2]^.val+1,i) and
GetNextInstructionUsingReg(p,hp1,taicpu(p).oper[0]^.reg) and
MatchInstruction(hp1, A_MOV, [taicpu(p).condition], [PF_None]) and
(taicpu(hp1).ops=3) and
MatchOperand(taicpu(hp1).oper[1]^, taicpu(p).oper[0]^.reg) and
(taicpu(hp1).oper[2]^.typ = top_shifterop) and
(taicpu(hp1).oper[2]^.shifterop^.rs = NR_NO) and
(taicpu(hp1).oper[2]^.shifterop^.shiftmode=SM_LSL) and
(assigned(FindRegDealloc(taicpu(p).oper[0]^.reg,tai(hp1.Next))) or
regLoadedWithNewValue(taicpu(p).oper[0]^.reg, hp1)) then
begin
{
and reg1,reg0,2^n-1
mov reg2,reg1, lsl imm1
mov reg3,reg2, lsr/asr imm1
=>
and reg1,reg0,2^n-1
if lsr and 2^n-1>=imm1 or asr and 2^n-1>imm1
}
if GetNextInstructionUsingReg(hp1,hp2,taicpu(p).oper[0]^.reg) and
MatchInstruction(hp2, A_MOV, [taicpu(p).condition], [PF_None]) and
(taicpu(hp2).ops=3) and
MatchOperand(taicpu(hp2).oper[1]^, taicpu(hp1).oper[0]^.reg) and
(taicpu(hp2).oper[2]^.typ = top_shifterop) and
(taicpu(hp2).oper[2]^.shifterop^.rs = NR_NO) and
(taicpu(hp2).oper[2]^.shifterop^.shiftmode in [SM_ASR,SM_LSR]) and
(taicpu(hp1).oper[2]^.shifterop^.shiftimm=taicpu(hp2).oper[2]^.shifterop^.shiftimm) and
(assigned(FindRegDealloc(taicpu(hp1).oper[0]^.reg,tai(hp2.Next))) or
regLoadedWithNewValue(taicpu(p).oper[0]^.reg, hp2)) and
((i<32-taicpu(hp1).oper[2]^.shifterop^.shiftimm) or
((i=32-taicpu(hp1).oper[2]^.shifterop^.shiftimm) and
(taicpu(hp2).oper[2]^.shifterop^.shiftmode=SM_LSR))) then
begin
DebugMsg('Peephole AndLslXsr2And done', p);
taicpu(p).oper[0]^.reg:=taicpu(hp2).oper[0]^.reg;
asml.Remove(hp1);
asml.Remove(hp2);
hp1.free;
hp2.free;
result:=true;
end
{
and reg1,reg0,2^n-1
mov reg2,reg1, lsl imm1
=>
mov reg2,reg1, lsl imm1
if imm1>i
}
else if i>32-taicpu(hp1).oper[2]^.shifterop^.shiftimm then
begin
DebugMsg('Peephole AndLsl2Lsl done', p);
taicpu(hp1).oper[1]^.reg:=taicpu(p).oper[0]^.reg;
asml.Remove(p);
p.free;
p:=hp1;
result:=true;
end
end;
end;
{