Mercurial > projects > ldc
annotate gen/functions.h @ 1117:4c20fcc4252b
Fun with parameter attributes: For several of the "synthetic" parameters added
to D functions, we can apply noalias and nocapture. They are sret parameters,
'nest' pointers passed to nested functions, and _argptr:
Nocapture:
- Sret and nest are nocapture because they don't represent D-level variables,
and thus the callee can't (validly) obtain a pointer to them, let alone keep
it around after it returns.
- _argptr is nocapture because although the callee has access to it as a
pointer, that pointer is invalidated when it returns.
All three are noalias because they're function-local variables
- Sret and _argptr are noalias because they're freshly alloca'd memory only
used for a single function call that's not allowed to keep an aliasing
pointer to it around (since the parameter is nocapture).
- 'Nest' is noalias because the callee only ever has access to one such pointer
per parent function, and every parent function has a different one.
This commit also ensures attributes set on sret, _arguments and _argptr are
propagated to calls to such functions.
It also adds one exception to the general rule that attributes on function types
should propagate to calls: the type of a delegate's function pointer has a
'nest' parameter, but this can either be a true 'nest' (for delegates to nested
functions) or a 'this' (for delegates to member functions). Since 'this' is
neither noalias nor nocapture, and there's generally no way to tell which one it
is, we remove these attributes at the call site if the callee is a delegate.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Sat, 14 Mar 2009 22:15:31 +0100 |
parents | 9167d492cbc2 |
children | 46f6365a50d7 |
rev | line source |
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664
eef8ac26c66c
Some missed LLVMDC -> LDC.
Christian Kamm <kamm incasoftware de>
parents:
486
diff
changeset
|
1 #ifndef LDC_GEN_FUNCTIONS_H |
eef8ac26c66c
Some missed LLVMDC -> LDC.
Christian Kamm <kamm incasoftware de>
parents:
486
diff
changeset
|
2 #define LDC_GEN_FUNCTIONS_H |
100 | 3 |
1024
9167d492cbc2
Abstracted more (most) ABI details out of the normal codegen.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
945
diff
changeset
|
4 const llvm::FunctionType* DtoFunctionType(Type* t, Type* thistype, Type* nesttype, bool ismain = false); |
100 | 5 const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl); |
6 | |
117 | 7 const llvm::FunctionType* DtoBaseFunctionType(FuncDeclaration* fdecl); |
8 | |
102
027b8d8b71ec
[svn r106] Turns out the last commit wasn't enough, now the D->LLVM process is even more split up.
lindquist
parents:
100
diff
changeset
|
9 void DtoResolveFunction(FuncDeclaration* fdecl); |
100 | 10 void DtoDeclareFunction(FuncDeclaration* fdecl); |
920
545f54041d91
Implemented proper support for naked asm using llvm module level asm. Still not 100% complete, but already 1000 times better that what we had before. Don's BignumX86 implementation from Tango (when turned into a standalone unittest) seems to fully work with no changes, and great performance :)
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
664
diff
changeset
|
11 void DtoDefineFunction(FuncDeclaration* fd); |
945
03d7c4aac654
SWITCHED TO LLVM 2.5 !
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
920
diff
changeset
|
12 |
920
545f54041d91
Implemented proper support for naked asm using llvm module level asm. Still not 100% complete, but already 1000 times better that what we had before. Don's BignumX86 implementation from Tango (when turned into a standalone unittest) seems to fully work with no changes, and great performance :)
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
664
diff
changeset
|
13 void DtoDefineNakedFunction(FuncDeclaration* fd); |
945
03d7c4aac654
SWITCHED TO LLVM 2.5 !
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
920
diff
changeset
|
14 void emitABIReturnAsmStmt(IRAsmBlock* asmblock, Loc loc, FuncDeclaration* fdecl); |
100 | 15 |
131 | 16 DValue* DtoArgument(Argument* fnarg, Expression* argexp); |
213
7816aafeea3c
[svn r229] Updated the object.d implementation to the latest Tango.
lindquist
parents:
131
diff
changeset
|
17 void DtoVariadicArgument(Expression* argexp, LLValue* dst); |
131 | 18 |
100 | 19 #endif |