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* Tcgx86.g_concatcopy use: copy_move (mov sequence) instead of copy_string (rep

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movsb) when copying a 4 byte block on i8086, when optimizing for size. 4 movs
  are usually shorter than the instructions needed to setup rep movsb and also
  greatly reduce register pressure. This fixes i8086 snapshot building with -Os,
  Mantis #27387

git-svn-id: trunk@29639 -
This commit is contained in:
nickysn 2015-02-07 13:19:34 +00:00
parent fd6d7d680d
commit 2d3ab816b0
1 changed files with 2 additions and 1 deletions
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compiler/x86/cgx86.pas
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@ -2283,7 +2283,8 @@ unit cgx86;
REGCX=NR_CX;
REGSI=NR_SI;
REGDI=NR_DI;
copy_len_sizes = [1, 2];
copy_len_sizes = [1, 2, 4]; { 4 is included here, because it's still more
efficient to use copy_move instead of copy_string for copying 4 bytes }
push_segment_size = S_W;
{$endif}