[Bug target/109236] [avr] Invalid code of signed 16-bit compare optimization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109236 Dimitar Dimitrov changed: What|Removed |Added CC||dimitar at gcc dot gnu.org --- Comment #1 from Dimitar Dimitrov --- Pass the -Wstrict-overflow=4 option to GCC and see that compiler assumes no integer overlow will happen: test.c:3:12: warning: assuming signed overflow does not occur when simplifying 'X - Y <= 0' to 'X <= Y' [-Wstrict-overflow] 3 | return (x-y <= 0); Consider using "__builtin_sub_overflow" for a strictly defined behaviour when integer overflow happens.
[Bug target/109236] [avr] Invalid code of signed 16-bit compare optimization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109236 gandalf at winds dot org changed: What|Removed |Added Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #2 from gandalf at winds dot org --- Thank you, I hadn't thought of that at all. That was precisely my problem and I developed a work-around. Not a bug.