John Regehr
easier to arrange than you might think void bar(void); static int x; int main(void) { if (x) bar(); }
tonight I am annoyed by: a program that both gcc and clang compile at -O2 and neither compiles at -O0
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@johnregehr UB b/c x was used before being initialized (unless static vars are special in that respect)? - View other replies
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@cr1901 globals in C are zeroed -
@johnregehr@cr1901 just globals? I thought it was anything with static storage -
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@johnregehr you need a commandline reducer, to tell you the minimal commandline for which your program does not compile. -
@johnregehr Program validity changed by optimizer is in my opinion a language and/or compiler bug. Either mandatory optimization or checked.
William D. Jones
kragen
unsigned void
John Ripley
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