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comparison gen/statements.cpp @ 1042:45af482e3832

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Updated ABI handling to be more flexible with regard to reusing lvalues and allocating fewer temporaries.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Wed, 04 Mar 2009 17:24:25 +0100
parents 9167d492cbc2
children 6bb04dbee21f
comparison
equal deleted inserted replaced
1041:9dca7182aa75 1042:45af482e3832
66 assert(f->decl->ir.irFunc->retArg); 66 assert(f->decl->ir.irFunc->retArg);
67 67
68 // emit dbg line 68 // emit dbg line
69 if (global.params.symdebug) DtoDwarfStopPoint(loc.linnum); 69 if (global.params.symdebug) DtoDwarfStopPoint(loc.linnum);
70 70
71 // FIXME: is there ever a case where a sret return needs to be rewritten for the ABI?
72
71 // get return pointer 73 // get return pointer
72 DValue* rvar = new DVarValue(f->type->next, f->decl->ir.irFunc->retArg); 74 DValue* rvar = new DVarValue(f->type->next, f->decl->ir.irFunc->retArg);
73 DValue* e = exp->toElem(p); 75 DValue* e = exp->toElem(p);
74 // store return value 76 // store return value
75 DtoAssign(loc, rvar, e); 77 DtoAssign(loc, rvar, e);
86 } 88 }
87 // the return type is not void, so this is a normal "register" return 89 // the return type is not void, so this is a normal "register" return
88 else 90 else
89 { 91 {
90 if (global.params.symdebug) DtoDwarfStopPoint(loc.linnum); 92 if (global.params.symdebug) DtoDwarfStopPoint(loc.linnum);
91 DValue* e = exp->toElem(p);
92 LLValue* v = e->getRVal();
93 delete e;
94 93
95 // do abi specific transformations on the return value 94 // do abi specific transformations on the return value
96 v = p->func()->type->fty->putRet(exp->type, v); 95 LLValue* v = p->func()->type->fty->putRet(exp->type, exp->toElem(p));
97 96
98 if (Logger::enabled()) 97 if (Logger::enabled())
99 Logger::cout() << "return value is '" <<*v << "'\n"; 98 Logger::cout() << "return value is '" <<*v << "'\n";
100 99
101 // can happen for classes and void main 100 // can happen for classes and void main