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view dmd2/objfile.h @ 1499:df11cdec45a2
Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324.
The idea is to separate the notion of const from 'this variable can always be
replaced with its initializer' in the frontend. To do that, I introduced
Declaration::isSameAsInitializer, which is overridden in VarDeclaration to
return false for constants that have a struct literal initializer.
So
{{{
const S s = S(5);
void foo() { auto ps = &s; }
// is no longer replaced by
void foo() { auto ps = &(S(5)); }
}}}
To make taking the address of a struct constant with a struct-initializer
outside of function scope possible, I made sure that AddrExp::optimize doesn't
try to run the argument's optimization with WANTinterpret - that'd again
replace the constant with a struct literal temporary.
author | Christian Kamm <kamm incasoftware de> |
---|---|
date | Sun, 14 Jun 2009 19:49:58 +0200 |
parents | 638d16625da2 |
children |
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#ifndef OBJFILE_H #define OBJFILE_H #include "root.h" typedef void *SymHandle; typedef unsigned SegOffset; enum ObjFormat { NTCOFF, ELF }; struct ObjFile : File { ObjFile(FileName *); ~ObjFile(); ObjFile *init(ObjFormat); void comment(const char *); // insert comment into object file void modulename(const char *); // set module name void library(const char *); // add default library void startaddress(SegHandle seg, SegOffset offset); // set start address // Segments enum SegHandle { code = 1, data, bss }; SymHandle defineSym(const char *name, SegHandle seg, SegOffset offset); SymHandle externSym(const char *name); SegOffset write(SegHandle seg, const void *data, unsigned nbytes); SegOffset writestring(SegHandle seg, char *string); SegOffset write8(SegHandle seg, unsigned b); SegOffset write16(SegHandle seg, unsigned w); SegOffset write32(SegHandle seg, unsigned long v); SegOffset write64(SegHandle seg, unsigned long long v); SegOffset fill0(SegHandle seg, unsigned nbytes); SegOffset align(SegHandle seg, unsigned size); SegOffset writefixup(SegHandle seg, SymHandle sym, unsigned value, int selfrelative); // Non-binding hint as to how big seg will grow void reserve(SegHandle seg, SegOffset size); // Set actual size void setSize(SegHandle seg, SegOffset size); // Get/set offset for subsequent writes void setOffset(SegHandle seg, SegOffset offset); SegOffset getOffset(SegHandle seg); SegHandle createSeg(const char *name); }; #endif