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view tests/mini/bug73.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 | 1bb99290e03a |
children |
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int find(char[] s, dchar c) { // c is a universal character foreach (int i, dchar c2; s) { if (c == c2) return i; } return -1; } void main() { char[] hello = "hello world"; int i = find(hello, 'w'); assert(i == 6); i = find(hello, 'z'); assert(i == -1); }