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* add restrictions for loaded/stored registers in case of references

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with write-back

git-svn-id: trunk@29958 -
This commit is contained in:
Jonas Maebe 2015-02-23 22:55:23 +00:00
parent 65c2c68b5f
commit e6ab39765d
1 changed files with 10 additions and 1 deletions
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11
compiler/aarch64/rgcpu.pas
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@ -103,7 +103,7 @@ implementation
procedure trgintcpu.add_cpu_interferences(p: tai);
var
i: longint;
i, j: longint;
begin
if p.typ=ait_instruction then
begin
@ -153,6 +153,15 @@ implementation
{ sp can always be base, never be index }
if taicpu(p).oper[i]^.ref^.index<>NR_NO then
add_edge(getsupreg(taicpu(p).oper[i]^.ref^.index),RS_SP);
{ in case of write back, the base register must be
different from the loaded/stored register }
if (taicpu(p).oper[i]^.ref^.addressmode in [AM_PREINDEXED,AM_POSTINDEXED]) and
(taicpu(p).oper[i]^.ref^.base<>NR_NO) then
begin
for j:=pred(i) downto 0 do
if taicpu(p).oper[j]^.typ=TOP_REG then
add_edge(getsupreg(taicpu(p).oper[j]^.reg),getsupreg(taicpu(p).oper[i]^.ref^.base));
end;
end;
end;
end;