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| author | Björn Gustavsson <[email protected]> | 2010-04-28 09:31:52 +0200 |
|---|---|---|
| committer | Raimo Niskanen <[email protected]> | 2010-05-20 12:20:50 +0200 |
| commit | 15ef8d67bc908a7939606468a5dda74188e65304 (patch) | |
| tree | cd7de1ba11f88361b4428983138080ad8f8f02a1 | |
| parent | d60ee77c2b152b89e057ffebe0694c21700c82ce (diff) | |
| download | otp-15ef8d67bc908a7939606468a5dda74188e65304.tar.gz otp-15ef8d67bc908a7939606468a5dda74188e65304.tar.bz2 otp-15ef8d67bc908a7939606468a5dda74188e65304.zip | |
beam_bool: Remove a clause in live_regs/1 that cannot match
live_regs/1 folds over a list of tuples, so a clause matching
an element being an empty list can never match.
If the list for some unfathomable reason would contain an empty
list, there will be an internal compiler error and no *.beam file
will be created. Thus this change is safe.
| -rw-r--r-- | lib/compiler/src/beam_bool.erl | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/compiler/src/beam_bool.erl b/lib/compiler/src/beam_bool.erl index 3ea0a470a5..62bb97ec42 100644 --- a/lib/compiler/src/beam_bool.erl +++ b/lib/compiler/src/beam_bool.erl @@ -631,10 +631,10 @@ fetch_reg(V, [{I,V}|_]) -> {x,I}; fetch_reg(V, [_|SRs]) -> fetch_reg(V, SRs). live_regs(Regs) -> - foldl(fun ({I,_}, _) -> I; - ([], Max) -> Max end, - -1, Regs)+1. - + foldl(fun ({I,_}, _) -> + I + end, -1, Regs)+1. + %%% %%% Convert a block to Static Single Assignment (SSA) form. |