mirror of https://github.com/cc65/cc65.git
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/* #1675 - Some UB cases of bit-shifts */
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#include <stdio.h>
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int unexpected = 0;
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void Test_UB(void)
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{
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{
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/* UB per standard, lhs expected in cc65: (int)-32768 */
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if (!((0x4000 << 1) < 0)) {
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++unexpected;
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printf("Expected: (0x4000 << 1) < 0, got lhs: %ld\n", (long)(0x4000 << 1));
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}
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}
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{
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/* UB per standard, lhs expected in cc65: (long)-2147483648L */
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if (!((0x40000000 << 1) < 0)) {
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++unexpected;
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printf("Expected: (0x40000000 << 1) < 0, got lhs: %ld\n", (long)(0x40000000 << 1));
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}
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}
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{
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/* UB per standard, lhs expected in cc65: (int)-32768 */
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if (!(((unsigned char)0x80 << 8) < 0)) {
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++unexpected;
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printf("Expected: ((unsigned char)0x80 << 8) < 0, got lhs: %ld\n", (long)((unsigned char)0x80 << 8));
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}
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}
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{
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/* UB per standard, lhs expected in cc65: (int)-32768 */
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if (!(((short)0x4000L << 1) < 0)) {
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++unexpected;
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printf("Expected: ((short)0x4000L << 1) < 0, got lhs: %ld\n", (long)((short)0x4000L << 1));
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}
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}
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{
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const signed short x = 0x4000;
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/* UB per standard, lhs expected in cc65: (int)-32768 */
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if (!((x << 1) < 0)) {
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++unexpected;
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printf("Expected: (x << 1) < 0, got lhs: %ld\n", (long)(x << 1));
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}
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}
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}
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int main(void)
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{
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Test_UB();
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if (unexpected != 0) {
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printf("Unexpected: %d\n", unexpected);
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}
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return unexpected;
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}
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