Check for opencoded swap() implementation. Signed-off-by: Denis Efremov <efre...@linux.com> --- scripts/coccinelle/misc/swap.cocci | 77 ++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 scripts/coccinelle/misc/swap.cocci
diff --git a/scripts/coccinelle/misc/swap.cocci b/scripts/coccinelle/misc/swap.cocci new file mode 100644 index 000000000000..38227a5d0855 --- /dev/null +++ b/scripts/coccinelle/misc/swap.cocci @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Check for opencoded swap() implementation. +/// +// Confidence: High +// Copyright: (C) 2021 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// +// Keywords: swap +// + +virtual patch +virtual org +virtual report +virtual context + +@r depends on !patch@ +identifier tmp; +expression a, b; +type T; +position p; +@@ + +( +* T tmp; +| +* T tmp = 0; +| +* T *tmp = NULL; +) +... when != tmp +* tmp = a; +* a = b;@p +* b = tmp; +... when != tmp + +@depends on patch@ +identifier tmp; +expression a, b; +type T; +@@ + +( +- T tmp; +| +- T tmp = 0; +| +- T *tmp = NULL; +) +... when != tmp +- tmp = a; +- a = b; +- b = tmp; ++ swap(a, b); +... when != tmp + +@depends on patch@ +identifier tmp; +expression a, b; +@@ + +- tmp = a; +- a = b; +- b = tmp; ++ swap(a, b); + +@script:python depends on report@ +p << r.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for swap()") + +@script:python depends on org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for swap()") -- 2.26.2