Example: provenance_roundtrip_via_intptr_t.c

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    #include <stdio.h>
    #include <inttypes.h>
    int x=1;
    int main() {
      int *p = &x;
      intptr_t i = (intptr_t)p;
      int *q = (int *)i;
      *q = 11; // is this free of undefined behaviour?
      printf("*p=%d  *q=%d\n",*p,*q);  
    }
[link to run test in Cerberus]

Experimental data (what does this mean?) 



cerberus-concrete-PVI-plain *p=11  *q=11


cerberus-concrete-PVI-ae *p=11  *q=11


cerberus-concrete-PVI-ae-udi *p=11  *q=11


gcc-8.3-O0 *p=11  *q=11


gcc-8.3-O2 *p=11  *q=11


gcc-8.3-O3 *p=11  *q=11


gcc-8.3-O2-no-strict-aliasing *p=11  *q=11


gcc-8.3-O3-no-strict-aliasing *p=11  *q=11


clang-7.0.1-O0 *p=11  *q=11


clang-7.0.1-O2 *p=11  *q=11


clang-7.0.1-O3 *p=11  *q=11


clang-7.0.1-O2-no-strict-aliasing *p=11  *q=11


clang-7.0.1-O3-no-strict-aliasing *p=11  *q=11


icc-19-O0 *p=11  *q=11


icc-19-O2 *p=11  *q=11


icc-19-O3 *p=11  *q=11


icc-19-O2-no-strict-aliasing *p=11  *q=11


icc-19-O3-no-strict-aliasing *p=11  *q=11