[src/trunk]: src/usr.bin/xlint/lint1 lint: treat _mm_ as builtin function nam...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3ea4f0986cd4
branches:  trunk
changeset: 985532:3ea4f0986cd4
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Aug 29 16:17:08 2021 +0000

description:
lint: treat _mm_ as builtin function name prefix for all compilers

This prefix is not specific to GCC, it is also known by the Intel C
Compiler and the Microsoft C compiler.

diffstat:

 usr.bin/xlint/lint1/tree.c |  21 ++++++++++-----------
 1 files changed, 10 insertions(+), 11 deletions(-)

diffs (49 lines):

diff -r 0207328d2da0 -r 3ea4f0986cd4 usr.bin/xlint/lint1/tree.c
--- a/usr.bin/xlint/lint1/tree.c        Sun Aug 29 15:49:04 2021 +0000
+++ b/usr.bin/xlint/lint1/tree.c        Sun Aug 29 16:17:08 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tree.c,v 1.361 2021/08/29 15:49:04 rillig Exp $        */
+/*     $NetBSD: tree.c,v 1.362 2021/08/29 16:17:08 rillig Exp $        */
 
 /*
  * Copyright (c) 1994, 1995 Jochen Pohl
@@ -37,7 +37,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: tree.c,v 1.361 2021/08/29 15:49:04 rillig Exp $");
+__RCSID("$NetBSD: tree.c,v 1.362 2021/08/29 16:17:08 rillig Exp $");
 #endif
 
 #include <float.h>
@@ -200,14 +200,13 @@
 is_compiler_builtin(const char *name)
 {
        /* https://gcc.gnu.org/onlinedocs/gcc/C-Extensions.html */
-       if (strncmp(name, "__atomic_", 9) == 0 ||
-           strncmp(name, "__builtin_", 10) == 0)
-               return true;
-
-       /* https://gcc.gnu.org/onlinedocs/gcc/C-Extensions.html */
-       /* obsolete but still in use, as of 2021 */
-       if (strncmp(name, "__sync_", 7) == 0)
-               return true;
+       if (gflag) {
+               if (strncmp(name, "__atomic_", 9) == 0 ||
+                   strncmp(name, "__builtin_", 10) == 0 ||
+                   /* obsolete but still in use, as of 2021 */
+                   strncmp(name, "__sync_", 7) == 0)
+                       return true;
+       }
 
        /* https://software.intel.com/sites/landingpage/IntrinsicsGuide/ */
        if (strncmp(name, "_mm_", 4) == 0)
@@ -229,7 +228,7 @@
                sym->s_scl = EXTERN;
                sym->s_def = DECL;
                if (follow_token == T_LPAREN) {
-                       if (gflag && is_compiler_builtin(sym->s_name)) {
+                       if (is_compiler_builtin(sym->s_name)) {
                                /*
                                 * Do not warn about these, just assume that
                                 * they are regular functions compatible with