Our website uses cookies to enhance your browsing experience.
Accept
to the top
close form

Fill out the form in 2 simple steps below:

Your contact information:

Step 1
Congratulations! This is your promo code!

Desired license type:

Step 2
Team license
Enterprise license
** By clicking this button you agree to our Privacy Policy statement
close form
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
* By clicking this button you agree to our Privacy Policy statement

close form
Free PVS‑Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

close form
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

close form
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

close form
check circle
Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
Examples of errors detected by the V751…

Examples of errors detected by the V751 diagnostic

V751. Parameter is not used inside function's body.


Linux Kernel

V751 Parameter 'LCDheight' is not used inside function body. init.c 339


static
unsigned short
SiS_GetModeID(int VGAEngine, unsigned int VBFlags,
              int HDisplay, int VDisplay,
              int Depth, bool FSTN,
              int LCDwidth, int LCDheight)
{
  unsigned short ModeIndex = 0;

  switch(HDisplay)
  {
  case 320:
    if(VDisplay == 200) ModeIndex = ModeIndex_320x200[Depth];
    else if(VDisplay == 240) {
      if((VBFlags & CRT2_LCD) && (FSTN))
        ModeIndex = ModeIndex_320x240_FSTN[Depth];
      else
        ModeIndex = ModeIndex_320x240[Depth];
    }
    break;
  case 400:
    if((!(VBFlags & CRT1_LCDA)) ||
       ((LCDwidth >= 800) && (LCDwidth >= 600))) { // <=
      if(VDisplay == 300) ModeIndex = ModeIndex_400x300[Depth];
    }
    break;
  case 512:
    if((!(VBFlags & CRT1_LCDA)) ||
       ((LCDwidth >= 1024) && (LCDwidth >= 768))) { // <=
      if(VDisplay == 384) ModeIndex = ModeIndex_512x384[Depth];
    }
    break;
    ....
  }

  return ModeIndex;
}

Valgrind

V751 Parameter 'i2' is not used inside function body. host_tilegx_defs.c 1223


void genReload_TILEGX ( /*OUT*/ HInstr ** i1,
                        /*OUT*/ HInstr ** i2,
                        HReg rreg,
                        Int offsetB )
{
  TILEGXAMode *am;
  vassert(!hregIsVirtual(rreg));
  am = TILEGXAMode_IR(offsetB, TILEGXGuestStatePointer());

  switch (hregClass(rreg)) {
  case HRcInt64:
    *i1 = TILEGXInstr_Load(8, rreg, am);                 // <=
    break;
  case HRcInt32:
    *i1 = TILEGXInstr_Load(4, rreg, am);                 // <=
    break;
  default:
    ppHRegClass(hregClass(rreg));
    vpanic("genReload_TILEGX: unimplemented regclass");
    break;
  }
}

Similar errors can be found in some other places:

  • V751 Parameter 'i2' is not used inside function body. host_mips_defs.c 2000

Steinberg SDKs

V751 Parameter 'column' is not used inside function body. pitchnamesdatabrowsersource.cpp 227


void PitchNamesDataBrowserSource::dbCellTextChanged(
  int32_t row, int32_t column, ....)
{
  if (pitchnames)
  {
    UString128 str (newText);
    if (str.getLength () == 0)
      pitchnames->removePitchName (0, (int16)row);
    else
      pitchnames->setPitchName (0, (int16)row, str);
  }
}

HarfBuzz

V751 Parameter 'right' is not used inside function body. hb-ot-kern-table.hh 115


inline int get_kerning (hb_codepoint_t left,
                        hb_codepoint_t right,
                        const char *end) const
{
  unsigned int l = (this+leftClassTable).get_class (left);
  unsigned int r = (this+leftClassTable).get_class (left);  // <=
  unsigned int offset = l * rowWidth + r * sizeof (FWORD);
  ....
}

Nice error due to Copy-Paste. One copied the line, but forgot to change the left with right twice.


System Shock

V751 Parameter 'Y' is not used inside function body. BTEST.C 67


fix Terrain( fix X, fix Y, int deriv ) {
  if( deriv == 0 )
    return fix_mul(...., (X - ....) );
  if( deriv == 1 )
    return fix_mul(...., (X - ....) );
  if( deriv == 2 ) return 0;
    return 0;
}

Godot Engine

V751 Parameter 'p_y' is not used inside function body. texture.cpp 1085


bool AtlasTexture::is_pixel_opaque(int p_x, int p_y) const {

  if (atlas.is_valid()) {
    return atlas->is_pixel_opaque(p_x + region.position.x + margin.position.x,
                                  p_x + region.position.y + margin.position.y);
  }

  return true;
}

Bullet Physics SDK

V751 Parameter 'halfExtentsZ' is not used inside function body. TinyRenderer.cpp 375


void TinyRenderObjectData::createCube(float halfExtentsX,
                                      float halfExtentsY,
                                      float halfExtentsZ,
                                      ....)
{
  ....
  m_model->addVertex(halfExtentsX * cube_vertices_textured[i * 9],
                     halfExtentsY * cube_vertices_textured[i * 9 + 1],
                     halfExtentsY * cube_vertices_textured[i * 9 + 2],
                     cube_vertices_textured[i * 9 + 4],
                     ....);
  ....
}

Overgrowth

V751 [CERT-MSC13-C] Parameter 'rayTo' is not used inside function body. btSoftBody.cpp 2148


btScalar btSoftBody::RayFromToCaster::rayFromToTriangle(
  const btVector3& rayFrom,
  const btVector3& rayTo,
  const btVector3& rayNormalizedDirection,
  const btVector3& a,
  const btVector3& b,
  const btVector3& c,
  btScalar maxt)
{
  static const btScalar ceps = -SIMD_EPSILON * 10;
  static const btScalar teps = SIMD_EPSILON * 10;

  const btVector3 n = btCross(b - a, c - a);
  const btScalar d = btDot(a, n);
  const btScalar den = btDot(rayNormalizedDirection, n);
  if (!btFuzzyZero(den))
  {
    const btScalar num = btDot(rayFrom, n) - d;
    const btScalar t = -num / den;
    if ((t > teps) && (t < maxt))
    {
      const btVector3 hit = rayFrom + rayNormalizedDirection * t;
      if ((btDot(n, btCross(a - hit, b - hit)) > ceps) &&
          (btDot(n, btCross(b - hit, c - hit)) > ceps) &&
          (btDot(n, btCross(c - hit, a - hit)) > ceps))
      {
        return (t);
      }
    }
  }
  return (-1);
}