Mercurial > projects > ldc
view gen/abi-generic.h @ 1479:4f7d50c744ed
Rewrite `StructLiteralExp::toElem` to store individual fields instead of
generating a constant to fill the entire struct with a single `store`.
This is much more efficient at compile time (fixing #320) and vastly reduces
the size of the emitted code. Since LLVM no longer needs to keep the data for
all fields in "registers" until the store happens, it should also be more
efficient at run time in cases where the fields aren't assigned with constants.
There's also some code clean-up by removing duplicated logic.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Sat, 06 Jun 2009 20:16:13 +0200 |
parents | 34f2fd925de3 |
children |
line wrap: on
line source
#ifndef LDC_GEN_ABI_GENERIC #define LDC_GEN_ABI_GENERIC #include "gen/llvmhelpers.h" #include "gen/tollvm.h" #include "gen/structs.h" /// Removes padding fields for (non-union-containing!) structs struct RemoveStructPadding : ABIRewrite { /// get a rewritten value back to its original form virtual LLValue* get(Type* dty, DValue* v) { LLValue* lval = DtoAlloca(dty, ".rewritetmp"); // Make sure the padding is zero, so struct comparisons work. // TODO: Only do this if there's padding, and/or only initialize padding. DtoMemSetZero(lval, DtoConstSize_t(getTypePaddedSize(DtoType(dty)))); DtoPaddedStruct(dty, v->getRVal(), lval); return lval; } /// get a rewritten value back to its original form and store result in provided lvalue /// this one is optional and defaults to calling the one above virtual void getL(Type* dty, DValue* v, llvm::Value* lval) { DtoPaddedStruct(dty, v->getRVal(), lval); } /// put out rewritten value virtual LLValue* put(Type* dty, DValue* v) { return DtoUnpaddedStruct(dty, v->getRVal()); } /// return the transformed type for this rewrite virtual const LLType* type(Type* dty, const LLType* t) { return DtoUnpaddedStructType(dty); } }; #endif