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I have another basic question about setjmp/longjmp. When I compile and run the following program, is it expected that global variable gi2 will be incremented twice? It seems that the code generated with clang and llc increments it only once (line 37-43 of attached file). $ clang setjmp6.c -o setjmp6.arm.ll -emit-llvm -O3 -S -ccc-host-triple arm-unknown-darwin -ccc-clang-archs arm $ llc

On Apr 13, 2011, at 9:51 AM, Akira Hatanaka wrote: > int > main (int argc, char** argv) > { > int n = atoi(argv[1]), r; > > if ((r = setjmp (buf))) > { > printf("n = %d\n", n); > return 0; > } Non-volatile local variables are not preserved by setjmp(), so this program can print whatever it wants. /jakob

...t; > printf("n = %d\n", n); >> > return 0; >> > } >> >> >> /jakob >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110427/fff9bc0c/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: f.s Type: application/octet-stream Size: 1791 bytes Desc: not available URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110427/fff9bc0c/attachment.obj>