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[csmith-dev] Some random questions
I have some random questions.
1. How to find bugs other than compiler crash/ICE. i.e. wrong codegen bugs using csmith generated tests?
I learnt from "scripts/compiler_test.pl" that, a wrong code bug is determined by comparing the checksum output value generated across
different optimization levels. So if a compiler wrong-code bug exists across all optimization, how do i find it?
2. Suppose if set "bitfields_creation_prob=100" (100% probability?) in my configuration file and use it to generate a testcase, should the generated
testcase contain atleast one bitfield structure in it? For me, setting "bitfields_creation_prob=100" didn't create any testcase with bitfield in it. i'm bit
3. What is the the ideal timeout value for csmith to generate a testcase. Can i consider $CSMITH_TIMEOUT = 90; itself? or it may take more than that also?
4. I'm not able to understand some of the statistics generated at the end of each test case. i.e.
XXX max struct depth: 1
depth: 0, occurrence: 412
depth: 1, occurrence: 37
XXX max _expression_ depth: 2
depth: 0, occurrence: 417
depth: 1, occurrence: 35
depth: 2, occurrence: 2
Please correct me if i'm wrong anywhere. Also please let me know if i'm not clear enough.