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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 83d3b25c2213
children
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#ifndef LDC_GEN_NESTED_H
#define LDC_GEN_NESTED_H

#include "declaration.h"
#include "mtype.h"
#include "gen/dvalue.h"

///////////////////////////////////////////////////////////
// Nested variable and context helpers
///////////////////////////////////////////////////////////

/// Creates the context value for a nested function.
void DtoCreateNestedContext(FuncDeclaration* fd);

/// Allocate space for variable accessed from nested function.
void DtoNestedInit(VarDeclaration* vd);

/// Gets the context value for a call to a nested function or newing a nested
/// class with arbitrary nesting.
llvm::Value* DtoNestedContext(Loc loc, Dsymbol* sym);

/// Gets the DValue of a nested variable with arbitrary nesting.
DValue* DtoNestedVariable(Loc loc, Type* astype, VarDeclaration* vd);

#endif