Created
January 29, 2016 19:08
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undefined behavior is cool
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| ➜ scratch cat both.c | |
| #include <stdio.h> | |
| int main(void) { | |
| int a; | |
| if (!(a == 0)) puts("ha"); | |
| if (!(a != 0)) puts("ho"); | |
| return 0; | |
| } | |
| ➜ scratch ~/Documents/svnroot/llvm/build/bin/clang -O1 both.c | |
| ➜ scratch ./a.out | |
| ha | |
| ho | |
| ➜ scratch ~/Documents/svnroot/llvm/build/bin/clang -v | |
| clang version 3.8.0 (trunk 245221) | |
| Target: x86_64-unknown-linux-gnu | |
| Thread model: posix | |
| InstalledDir: /home/amidvidy/Documents/svnroot/llvm/build/bin | |
| Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/5.2.1 | |
| Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8 | |
| Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.4 | |
| Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9 | |
| Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.2 | |
| Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.2.1 | |
| Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.2.1 | |
| Candidate multilib: .;@m64 | |
| Candidate multilib: 32;@m32 | |
| Candidate multilib: x32;@mx32 | |
| Selected multilib: .;@m64 | |
| ➜ scratch | |
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