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* do reg2=reg1*const by lea if possible

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git-svn-id: trunk@25908 -
This commit is contained in:
florian 2013-11-01 19:01:36 +00:00
parent a16ceb6cdf
commit 7fc1d70e49
1 changed files with 11 additions and 2 deletions
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13
compiler/x86/cgx86.pas
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@ -1556,7 +1556,7 @@ unit cgx86;
power : longint;
href : treference;
begin
{ if (op in [OP_MUL,OP_IMUL]) and (size in [OS_32,OS_S32,OS_64,OS_S64]) and
if (op in [OP_MUL,OP_IMUL]) and (size in [OS_32,OS_S32,OS_64,OS_S64]) and
not(cs_check_overflow in current_settings.localswitches) and
(a>1) and ispowerof2(int64(a-1),power) and (power in [1..3]) then
begin
@ -1565,7 +1565,16 @@ unit cgx86;
href.scalefactor:=a-1;
list.concat(taicpu.op_ref_reg(A_LEA,TCgSize2OpSize[size],href,dst));
end
else } if (op=OP_ADD) and
else if (op in [OP_MUL,OP_IMUL]) and (size in [OS_32,OS_S32,OS_64,OS_S64]) and
not(cs_check_overflow in current_settings.localswitches) and
(a>1) and ispowerof2(int64(a),power) and (power in [1..3]) then
begin
reference_reset_base(href,src,0,0);
href.index:=src;
href.scalefactor:=a;
list.concat(taicpu.op_ref_reg(A_LEA,TCgSize2OpSize[size],href,dst));
end
else if (op=OP_ADD) and
((size in [OS_32,OS_S32]) or
{ lea supports only 32 bit signed displacments }
((size=OS_64) and (a>=0) and (a<=maxLongint)) or