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Driver to test IsPowerOf2. Could be extended for other library routines.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@408 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2001-08-28 23:28:10 +00:00
parent 5b7d0bf988
commit 0eca9ed813
1 changed files with 46 additions and 0 deletions
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tools/tests/testPow2.cpp Normal file
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/* -*-c++-*- */
#include <stdio.h>
#include <stdlib.h>
#include "/home/vadve/vadve/Research/DynOpt/LLVM/llvm/include/llvm/Support/MathExtras.h"
inline void
testPow(int C, bool isPow)
{
unsigned pow = 0;
bool testIsPow = IsPowerOf2(C, pow);
if (isPow != testIsPow)
printf("ERROR: IsPowerOf2() says \t%d %s a power of 2 = %d\n",
C, (isPow? "IS" : "IS NOT"), pow);
#undef PRINT_CORRECT_RESULTS
#ifdef PRINT_CORRECT_RESULTS
else
printf("CORRECT: IsPowerOf2() says \t%d %s a power of 2 = %d\n",
C, (isPow? "IS" : "IS NOT"), pow);
#endif PRINT_CORRECT_RESULTS
}
int
main(int argc, char** argv)
{
unsigned L = (argc > 1)? atoi(argv[1]) : 16;
unsigned C = 1;
testPow(0, false);
for (unsigned i = 1; i < L; i++, C = C << 1)
{
testPow(C, true);
testPow(-C, true);
for (unsigned j = C+1; j < (C << 1); j++)
{
testPow(j, false);
testPow(-j, false);
}
}
return 0;
}