Well somewhere along the way I fixed it when I started making gjmp and gjmp_append return sane values.
Are there any docs out there that describe how to write a backend. The doc here Tiny C Compiler Reference Documentation (bellard.org)<https://bellard.org/tcc/tcc-doc.html#Code-generation> seems way way out of date Any guidance, gotchas, tips are welcome From: tinycc-devel-bounces+paulmoore100=hotmail....@nongnu.org <tinycc-devel-bounces+paulmoore100=hotmail....@nongnu.org> On Behalf Of Paul Moore Sent: Tuesday, April 16, 2024 2:42 PM To: tinycc-devel@nongnu.org Subject: [Tinycc-devel] warning: function might return no value: Right at the start of creating my own backend, just making it trace all calls to it and do the minimum to not have the compiler complain. Overcome a few issues but: Compiling examples/fib.c I get warning: function might return no value: I simplified it a bit so I could follow the code path int fib(n) { if (n <= 2) return 1; else return 2;//return fib(n-1) + fib(n-2); } I obviously am not doing something I am supposed to do but cant see what. Here all the calls to me gfunc_prolog(000001FC69CF9B50) gen_opi(158) load(0, 306) gen_opi(149) gjmp_append(0, 0) load(0, 48) gjmp(0) gjmp(0) load(0, 48) gjmp(8) ../examples/fib.c:10: warning: function might return no value: 'fib' gfunc_epilog() gfunc_prolog(000001FC69CF9A00) load(0, 48) store(0, 306) gfunc_call(1) gfunc_call(3) load(0, 48) gfunc_epilog() Somewhere in those calls I was supposed to do something, but did not. I read through (and stepped through) the code in the i386gen and cannot see what I am missing
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