Mercurial > projects > ldc

comparison gen/abi-generic.h @ 1359:34f2fd925de3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Intrinsics shouldn't see struct padding, so use a special TargetABI for them that removes it. This unbreaks the `llvm_*_with_overflow` intrinsics.
author Frits van Bommel <fvbommel wxs.nl>
date Sat, 16 May 2009 13:06:49 +0200
parents
children
comparison
equal deleted inserted replaced
1357:48747003a5de 1359:34f2fd925de3
1 #ifndef LDC_GEN_ABI_GENERIC
2 #define LDC_GEN_ABI_GENERIC
3
4 #include "gen/llvmhelpers.h"
5 #include "gen/tollvm.h"
6 #include "gen/structs.h"
7
8 /// Removes padding fields for (non-union-containing!) structs
9 struct RemoveStructPadding : ABIRewrite {
10 /// get a rewritten value back to its original form
11 virtual LLValue* get(Type* dty, DValue* v) {
12 LLValue* lval = DtoAlloca(dty, ".rewritetmp");
13
14 // Make sure the padding is zero, so struct comparisons work.
15 // TODO: Only do this if there's padding, and/or only initialize padding.
16 DtoMemSetZero(lval, DtoConstSize_t(getTypePaddedSize(DtoType(dty))));
17
18 DtoPaddedStruct(dty, v->getRVal(), lval);
19 return lval;
20 }
21
22 /// get a rewritten value back to its original form and store result in provided lvalue
23 /// this one is optional and defaults to calling the one above
24 virtual void getL(Type* dty, DValue* v, llvm::Value* lval) {
25 DtoPaddedStruct(dty, v->getRVal(), lval);
26 }
27
28 /// put out rewritten value
29 virtual LLValue* put(Type* dty, DValue* v) {
30 return DtoUnpaddedStruct(dty, v->getRVal());
31 }
32
33 /// return the transformed type for this rewrite
34 virtual const LLType* type(Type* dty, const LLType* t) {
35 return DtoUnpaddedStructType(dty);
36 }
37 };
38
39 #endif