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b931e65811
Fixes #1267 Avoid ICE, but treat plain int bit-fields declared via typedef as signed rather than unsigned. It is more efficient to treat them as unsigned, but this requires distinguishing int from signed int, and this is curently not done.
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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Copyright 2020 The cc65 Authors
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/*
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Tests of bit-field signedness with typedefs; see https://github.com/cc65/cc65/issues/1267
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*/
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#include <stdio.h>
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static unsigned char failures = 0;
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typedef int i16;
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typedef unsigned int u16;
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typedef signed int s16;
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static struct ints {
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i16 i : 4;
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u16 u : 4;
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s16 s : 4;
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} si = {1, 2, 3};
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static void test_bitfield_typedefs (void)
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{
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if (si.i != 1) {
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/* Note that this is another bug that i is signed. */
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printf ("Got si.a = %d, expected 1.\n", si.i);
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failures++;
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}
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if (si.u != 2) {
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printf ("Got si.u = %u, expected 2.\n", si.u);
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failures++;
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}
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if (si.s != 3) {
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printf ("Got si.s = %d, expected 3.\n", si.s);
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failures++;
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}
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si.i = -1;
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si.u = -2;
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si.s = -3;
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/* Note that this is another bug that i is signed. */
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if (si.i != -1) {
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printf ("Got si.a = %d, expected -1.\n", si.i);
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failures++;
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}
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if (si.u != 14) {
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printf ("Got si.u = %u, expected 14.\n", si.u);
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failures++;
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}
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if (si.s != -3) {
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printf ("Got si.s = %d, expected -3.\n", si.s);
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failures++;
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}
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}
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int main (void)
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{
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test_bitfield_typedefs ();
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printf ("failures: %u\n", failures);
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return failures;
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}
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