clang/test/Analysis/solver-sym-simplification-ptr-bool.cl

   1 // RUN: %clang_analyze_cc1 -triple amdgcn-unknown-unknown -analyze -analyzer-checker=core %s
   2
   3 // expected-no-diagnostics
   4
   5 // This test case covers an issue found in the static analyzer
   6 // solver where pointer sizes were assumed. Pointer sizes may vary on other
   7 // architectures. This issue was originally discovered on a downstream,
   8 // custom target, this assert occurs on the custom target and this one
   9 // without the fix, and is fixed with this change.
  10 //
  11 // The assertion appears to be happening as a result of evaluating the
  12 // SymIntExpr (reg_$0<int * p>) != 0U in VisitSymIntExpr located in
  13 // SimpleSValBuilder.cpp. The LHS is evaluated to 32b and the RHS is
  14 // evaluated to 16b. This eventually leads to the assertion in APInt.h.
  15 //
  16 // APInt.h:1151: bool llvm::APInt::operator==(const llvm::APInt &) const: Assertion `BitWidth == RHS.BitWidth && "Comparison requires equal bit widths"'
  17 //
  18 void test1(__attribute__((address_space(256))) int * p) {
  19   __attribute__((address_space(256))) int * q = p-1;
  20   if (q) {}
  21   if (q) {}
  22   (void)q;
  23 }
  24
  25 void test2(__attribute__((address_space(256))) int * p) {
  26   __attribute__((address_space(256))) int * q = p-1;
  27   q && q;
  28   q && q;
  29   (void)q;
  30 }