Mercurial > projects > ldc
view dmd2/gnuc.c @ 1275:bedf0bfb8fdb
Implement first D-specific optimization pass: -simplify-drtcalls.
It uses the machinery of the standard -simplify-libcalls pass, but optimizes
calls to the D runtime instead of calls to C libraries.
At the moment, these optimizations are implemented by this pass:
- Avoid the runtime call for `arr.length = newlen` if it can determine that
the new length isn't longer than the old one.
- Ditto for `cast(T[]) arr` if it will clearly always succeed.
(e.g. if the length of the original array is zero, or if the old element
size is a multiple of the new element size)
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Tue, 28 Apr 2009 21:58:06 +0200 |
parents | f04dde6e882c |
children |
line wrap: on
line source
// Put functions in here missing from gnu C #include "gnuc.h" int memicmp(const char *s1, const char *s2, int n) { int result = 0; for (int i = 0; i < n; i++) { char c1 = s1[i]; char c2 = s2[i]; result = c1 - c2; if (result) { if ('A' <= c1 && c1 <= 'Z') c1 += 'a' - 'A'; if ('A' <= c2 && c2 <= 'Z') c2 += 'a' - 'A'; result = c1 - c2; if (result) break; } } return result; } int stricmp(const char *s1, const char *s2) { int result = 0; for (;;) { char c1 = *s1; char c2 = *s2; result = c1 - c2; if (result) { if ('A' <= c1 && c1 <= 'Z') c1 += 'a' - 'A'; if ('A' <= c2 && c2 <= 'Z') c2 += 'a' - 'A'; result = c1 - c2; if (result) break; } if (!c1) break; s1++; s2++; } return result; }