view gen/passes/Passes.h @ 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>
date Tue, 28 Apr 2009 21:58:06 +0200
children 91d9386d4a5a
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#ifndef LDC_PASSES_H
#define LDC_PASSES_H

namespace llvm {
    class FunctionPass;

// Performs simplifications on runtime calls.
llvm::FunctionPass* createSimplifyDRuntimeCalls();