Bug 29259 – Local variables 'k' and 'y' in s2b() in dtoa.cpp are computed but not used

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Wan-Teh Chang]

In WebKit/JavaScriptCore/wtf/dtoa.cpp (r48248)
on the trunk, we have:

static void s2b(BigInt& b, const char* s, int nd0, int nd, uint32_t y9)
{
    int k;
    int32_t y;
    int32_t x = (nd + 8) / 9;

    for (k = 0, y = 1; x > y; y <<= 1, k++) { }
    ...

The local variables 'k' and 'y' are not used
after the for loop, so the variables 'k' and
'y' and the for loop can be deleted.

This is a cleanup of r43457.

Also, the macro Kmax is defined but not used:

#define Kmax 15

That definition can be deleted.

[Wan-Teh Chang]

Re: Kmax

When dtoa.cpp was moved to WebKit/JavaScriptCore/wtf
in r38117, Kmax was already defined but not used.  I
didn't look further back in the history of dtoa.cpp.

[Xan Lopez]

Created attachment 65060 [details]
dtoa.diff

Wan-Teh is right... the 'x' variable can also be removed, since it's only used in the loop.

[Kent Tamura]

Comment on attachment 65060 [details]
dtoa.diff

Looks good.

[Xan Lopez]

Comment on attachment 65060 [details]
dtoa.diff

Landed as r66089.

[Xan Lopez]

Closing.