diff options
| author | Julia Lawall <Julia.Lawall@lip6.fr> | 2017-11-13 06:53:35 +0100 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-11-16 08:56:42 +0900 |
| commit | 937c812dfc0a25343d56b07734438610a1fb7b46 (patch) | |
| tree | ad1f1cd178171d99fbd98e7bace9340b8f9bad13 /scripts | |
| parent | 6851ba1a1b22ba2e0800002d531bf04ced22ec18 (diff) | |
| download | linux-stable-937c812dfc0a25343d56b07734438610a1fb7b46.tar.gz linux-stable-937c812dfc0a25343d56b07734438610a1fb7b46.tar.bz2 linux-stable-937c812dfc0a25343d56b07734438610a1fb7b46.zip | |
coccinelle: orplus: reorganize to improve performance
Adding two #define constants is less common than performing & and |
operations on them, so put the addition first to reduce the set of cases
that have to be considered in detail. At the same time, add & and |
patterns for both arguments of +, to account for commutativity and obtain
more results.
Running time is divided by 3 when applying this to the whole kernel on my
laptop with an Intel i5-6200U CPU.
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/coccinelle/misc/orplus.cocci | 43 |
1 files changed, 29 insertions, 14 deletions
diff --git a/scripts/coccinelle/misc/orplus.cocci b/scripts/coccinelle/misc/orplus.cocci index 81fabf379390..08de5be73693 100644 --- a/scripts/coccinelle/misc/orplus.cocci +++ b/scripts/coccinelle/misc/orplus.cocci @@ -14,7 +14,19 @@ virtual report virtual context @r@ -constant c; +constant c,c1; +identifier i,i1; +position p; +@@ + +( + c1 + c - 1 +| + c1@i1 +@p c@i +) + +@s@ +constant r.c, r.c1; identifier i; expression e; @@ @@ -27,28 +39,31 @@ e & c@i e |= c@i | e &= c@i +| +e | c1@i +| +e & c1@i +| +e |= c1@i +| +e &= c1@i ) -@s@ -constant r.c,c1; -identifier i1; -position p; +@depends on s@ +position r.p; +constant c1,c2; @@ -( - c1 + c - 1 -| -*c1@i1 +@p c -) +* c1 +@p c2 -@script:python depends on org@ -p << s.p; +@script:python depends on s && org@ +p << r.p; @@ cocci.print_main("sum of probable bitmasks, consider |",p) -@script:python depends on report@ -p << s.p; +@script:python depends on s && report@ +p << r.p; @@ msg = "WARNING: sum of probable bitmasks, consider |" |