diff options
Diffstat (limited to 'lib/compiler/src/beam_block.erl')
| -rw-r--r-- | lib/compiler/src/beam_block.erl | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl index 2954d95b7e..b93293763d 100644 --- a/lib/compiler/src/beam_block.erl +++ b/lib/compiler/src/beam_block.erl @@ -74,6 +74,10 @@ function({function,Name,Arity,CLabel,Is0}) -> %%% (Provided that x2 is killed in the code that follows.) %%% +swap_opt([{move,Src,Dst},{swap,Dst,Other}|Is]) when Src =/= Other -> + swap_opt([{move,Other,Dst},{move,Src,Other}|Is]); +swap_opt([{move,Src,Dst},{swap,Other,Dst}|Is]) when Src =/= Other -> + swap_opt([{move,Other,Dst},{move,Src,Other}|Is]); swap_opt([{move,Reg1,{x,_}=Temp}=Move1, {move,Reg2,Reg1}=Move2|Is0]) when Reg1 =/= Temp -> case swap_opt_end(Is0, Temp, Reg2, []) of |