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29 lines
601 B
C
29 lines
601 B
C
/*
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!!DESCRIPTION!! optimizer bug
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!!ORIGIN!! testsuite
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!!LICENCE!! Public Domain
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!!AUTHOR!! Oliver Schmidt
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*/
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#include <stdio.h>
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/*
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After spending a "little" time I finally succeeded in isolating an
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(maybe THE) optimizer bug causing Contiki to fail.
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From my user perspective it is very interesting that the bug shows up
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with compiler option -O but does _not_ show up with -Oi.
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*/
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unsigned htons(unsigned val)
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{
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return (((unsigned) (val)) << 8) | (((unsigned) (val)) >> 8);
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}
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int main(void)
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{
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printf("%x -> %x\n", 0x1234, htons(0x1234) & 0xffff);
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return 0;
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}
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