CVS commit: src

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

Module Name:    src
Committed By:   rillig
Date:           Thu May 26 09:26:00 UTC 2022

Modified Files:
        src/tests/usr.bin/xlint/lint1: msg_132.c msg_132.exp
        src/usr.bin/xlint/lint1: tree.c

Log Message:
lint: do not warn about loss in accuracy if the actual value fits

The expression 'any & 0xff' can always be assigned to 'uint8_t' without
loss of any value bits.  In the same way, '(any & 0xff) << 8' can always
be assigned to 'uint16_t'.

Previously, lint warned about these cases.  Fix these wrong warnings by
tracking the possible values of integer expressions across a single
expression.

Fixes PR 36668, so that <sys/endian.h> does not need to be cluttered
with useless casts anymore.


To generate a diff of this commit:
cvs rdiff -u -r1.10 -r1.11 src/tests/usr.bin/xlint/lint1/msg_132.c
cvs rdiff -u -r1.9 -r1.10 src/tests/usr.bin/xlint/lint1/msg_132.exp
cvs rdiff -u -r1.443 -r1.444 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.