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view usr/src/tools/smatch/src/validation/constexpr-offsetof.c @ 19241:79022555a4a9

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11972 resync smatch Reviewed by: Robert Mustacchi <rm@fingolfin.org> Approved by: Dan McDonald <danmcd@joyent.com>
author John Levon <john.levon@joyent.com>
date Mon, 11 Nov 2019 16:23:50 +0000
parents b73b4fe381d3
children
line wrap: on
line source

struct A {
	int a[1];
	int b;
};

extern int c;

static int o[] = {
	[__builtin_offsetof(struct A, b)] = 0,		// OK
	[__builtin_offsetof(struct A, a[0])] = 0,	// OK
	[__builtin_offsetof(struct A, a[0*0])] = 0,	// OK
	[__builtin_offsetof(struct A, a[c])] = 0	// KO
};

/*
 * check-name: constexprness __builtin_offsetof()
 *
 * check-error-start
constexpr-offsetof.c:12:39: error: bad constant expression
 * check-error-end
 */