[PATCH] Coccinelle: Add misc/boolconv.cocci

[PATCH] Coccinelle: Add misc/boolconv.cocci

[Andrew F. Davis]

Add a script to check for unneeded conversions to bool.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
 scripts/coccinelle/misc/boolconv.cocci | 90 ++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 scripts/coccinelle/misc/boolconv.cocci

diff --git a/scripts/coccinelle/misc/boolconv.cocci b/scripts/coccinelle/misc/boolconv.cocci
new file mode 100644
index 0000000..33c464d
--- /dev/null
+++ b/scripts/coccinelle/misc/boolconv.cocci
@@ -0,0 +1,90 @@
+/// Remove unneeded conversion to bool
+///
+//# Relational and logical operators evaluate to bool,
+//# explicit conversion is overly verbose and unneeded.
+//
+// Copyright: (C) 2016 Andrew F. Davis <afd@ti.com> GPLv2.
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@depends on patch@
+expression A, B;
+symbol true, false;
+@@
+
+(
+  A == B
+|
+  A != B
+|
+  A > B
+|
+  A < B
+|
+  A >= B
+|
+  A <= B
+|
+  A && B
+|
+  A || B
+)
+- ? true : false
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@r depends on !patch@
+expression A, B;
+symbol true, false;
+position p;
+@@
+
+(
+  A == B
+|
+  A != B
+|
+  A > B
+|
+  A < B
+|
+  A >= B
+|
+  A <= B
+|
+  A && B
+|
+  A || B
+)
+* ? true : false@p
+
+//----------------------------------------------------------
+//  For org mode
+//----------------------------------------------------------
+
+@script:python depends on r&&org@
+p << r.p;
+@@
+
+msg = "WARNING: conversion to bool not needed here"
+coccilib.org.print_todo(p[0], msg)
+
+//----------------------------------------------------------
+//  For report mode
+//----------------------------------------------------------
+
+@script:python depends on r&&report@
+p << r.p;
+@@
+
+msg = "WARNING: conversion to bool not needed here"
+coccilib.report.print_report(p[0], msg)
-- 
2.9.0

Re: [PATCH] Coccinelle: Add misc/boolconv.cocci

[Joe Perches]

On Thu, 2016-06-23 at 13:53 -0500, Andrew F. Davis wrote:
> Add a script to check for unneeded conversions to bool.

this could also be extended for bool functions that:

	return !!expression;
and
	return expression != 0;

Re: [PATCH] Coccinelle: Add misc/boolconv.cocci

[Andrew F. Davis]

On 06/23/2016 02:12 PM, Joe Perches wrote:
> On Thu, 2016-06-23 at 13:53 -0500, Andrew F. Davis wrote:
>> Add a script to check for unneeded conversions to bool.
> 
> this could also be extended for bool functions that:
> 
> 	return !!expression;
> and
> 	return expression != 0;
> 

Agreed, it's in the works, I was going to post this current set with
some patches to the kernel that is detects, then add additional checks
and their kernel fixes incrementally.

For the second suggestion I think we could have additions to
boolinit.cocci that include the results of comparison/logical operations.

Thanks,
Andrew

Re: [PATCH] Coccinelle: Add misc/boolconv.cocci

[Julia Lawall]

On Thu, 23 Jun 2016, Andrew F. Davis wrote:

> Add a script to check for unneeded conversions to bool.
> 
> Signed-off-by: Andrew F. Davis <afd@ti.com>

Acked-by: Julia Lawall <julia.lawall@lip6.fr>


> ---
>  scripts/coccinelle/misc/boolconv.cocci | 90 ++++++++++++++++++++++++++++++++++
>  1 file changed, 90 insertions(+)
>  create mode 100644 scripts/coccinelle/misc/boolconv.cocci
> 
> diff --git a/scripts/coccinelle/misc/boolconv.cocci b/scripts/coccinelle/misc/boolconv.cocci
> new file mode 100644
> index 0000000..33c464d
> --- /dev/null
> +++ b/scripts/coccinelle/misc/boolconv.cocci
> @@ -0,0 +1,90 @@
> +/// Remove unneeded conversion to bool
> +///
> +//# Relational and logical operators evaluate to bool,
> +//# explicit conversion is overly verbose and unneeded.
> +//
> +// Copyright: (C) 2016 Andrew F. Davis <afd@ti.com> GPLv2.
> +
> +virtual patch
> +virtual context
> +virtual org
> +virtual report
> +
> +//----------------------------------------------------------
> +//  For patch mode
> +//----------------------------------------------------------
> +
> +@depends on patch@
> +expression A, B;
> +symbol true, false;
> +@@
> +
> +(
> +  A == B
> +|
> +  A != B
> +|
> +  A > B
> +|
> +  A < B
> +|
> +  A >= B
> +|
> +  A <= B
> +|
> +  A && B
> +|
> +  A || B
> +)
> +- ? true : false
> +
> +//----------------------------------------------------------
> +//  For context mode
> +//----------------------------------------------------------
> +
> +@r depends on !patch@
> +expression A, B;
> +symbol true, false;
> +position p;
> +@@
> +
> +(
> +  A == B
> +|
> +  A != B
> +|
> +  A > B
> +|
> +  A < B
> +|
> +  A >= B
> +|
> +  A <= B
> +|
> +  A && B
> +|
> +  A || B
> +)
> +* ? true : false@p
> +
> +//----------------------------------------------------------
> +//  For org mode
> +//----------------------------------------------------------
> +
> +@script:python depends on r&&org@
> +p << r.p;
> +@@
> +
> +msg = "WARNING: conversion to bool not needed here"
> +coccilib.org.print_todo(p[0], msg)
> +
> +//----------------------------------------------------------
> +//  For report mode
> +//----------------------------------------------------------
> +
> +@script:python depends on r&&report@
> +p << r.p;
> +@@
> +
> +msg = "WARNING: conversion to bool not needed here"
> +coccilib.report.print_report(p[0], msg)
> -- 
> 2.9.0
> 
>