CVS commit: src

["Roland Illig" <rillig%netbsd.org@localhost>]

Module Name:    src
Committed By:   rillig
Date:           Tue Apr  6 21:59:58 UTC 2021

Modified Files:
        src/tests/usr.bin/xlint/lint1: msg_118.c
        src/usr.bin/xlint/lint1: tree.c

Log Message:
lint: for shift in C99 mode, do not warn about difference to pre-C90

C99 is too far away from traditional C to make this warning useful.
There are 3 different situations in which this warning is generated:

For '1 << (unsigned char)1', the result type is 'unsigned int' in
traditional C.  The result type is unsigned because at least 1 of the
operators is unsigned, and it is 'unsigned int' because the usual
arithmetic promotions are applied.

For '1 >> (long)1', as well as for '1 << (long)1', the result type is
'long' in traditional C since the usual arithmetic promotions are
applied.

Omitting this warning in C99 mode reduces the amount of lint warnings in
a typical NetBSD release build by approximately 6800 of 107000 total.


To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/tests/usr.bin/xlint/lint1/msg_118.c
cvs rdiff -u -r1.270 -r1.271 src/usr.bin/xlint/lint1/tree.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.