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* DeepMovOpt requires that the target reg of the mov is not modified before hp2

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git-svn-id: trunk@49577 -
This commit is contained in:
florian 2021-07-04 20:46:02 +00:00
parent 94a15faa7f
commit 7a4110cca9
1 changed files with 3 additions and 1 deletions
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4
compiler/x86/aoptx86.pas
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@ -2811,6 +2811,9 @@ unit aoptx86;
if
not RegModifiedByInstruction(taicpu(p).oper[0]^.reg, hp1) and
not RegModifiedBetween(taicpu(p).oper[0]^.reg, hp1, hp2) and
{ if we replace taicpu(p).oper[1]^.reg by taicpu(p).oper[0]^.reg,
taicpu(p).oper[1]^.reg might not be modified in between }
not RegModifiedBetween(CurrentReg, p, hp2) and
DeepMovOpt(taicpu(p), taicpu(hp2)) then
begin
{ Just in case something didn't get modified (e.g. an
@ -2838,7 +2841,6 @@ unit aoptx86;
hp3 := hp2;
Continue;
end;
end;
end;
end;