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view lphobos/typeinfo1/ti_char.d @ 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> |
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date | Tue, 28 Apr 2009 21:58:06 +0200 |
parents | 2c3cd3596187 |
children |
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module typeinfo1.ti_char; class TypeInfo_a : TypeInfo { char[] toString() { return "char"; } hash_t getHash(void *p) { return *cast(char *)p; } int equals(void *p1, void *p2) { return *cast(char *)p1 == *cast(char *)p2; } int compare(void *p1, void *p2) { return *cast(char *)p1 - *cast(char *)p2; } size_t tsize() { return char.sizeof; } void swap(void *p1, void *p2) { char t; t = *cast(char *)p1; *cast(char *)p1 = *cast(char *)p2; *cast(char *)p2 = t; } void[] init() { static char c; return (cast(char *)&c)[0 .. 1]; } }