1 //===-- Target.cpp --------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the common infrastructure (including C bindings) for
11 // libLLVMTarget.a, which implements target information.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "llvm-c/Target.h"
16 #include "llvm-c/Initialization.h"
17 #include "llvm/IR/DataLayout.h"
18 #include "llvm/IR/LLVMContext.h"
19 #include "llvm/IR/Value.h"
20 #include "llvm/InitializePasses.h"
21 #include "llvm/PassManager.h"
22 #include "llvm/Target/TargetLibraryInfo.h"
23 #include <cstring>
24 
25 using namespace llvm;
26 
27 inline DataLayout *unwrap(LLVMTargetDataRef P) {
28   return reinterpret_cast<DataLayout*>(P);
29 }
30 
31 inline LLVMTargetDataRef wrap(const DataLayout *P) {
32   return reinterpret_cast<LLVMTargetDataRef>(const_cast<DataLayout*>(P));
33 }
34 
35 inline TargetLibraryInfo *unwrap(LLVMTargetLibraryInfoRef P) {
36   return reinterpret_cast<TargetLibraryInfo*>(P);
37 }
38 
39 inline LLVMTargetLibraryInfoRef wrap(const TargetLibraryInfo *P) {
40   TargetLibraryInfo *X = const_cast<TargetLibraryInfo*>(P);
41   return reinterpret_cast<LLVMTargetLibraryInfoRef>(X);
42 }
43 
44 void llvm::initializeTarget(PassRegistry &Registry) {
45   initializeDataLayoutPassPass(Registry);
46   initializeTargetLibraryInfoPass(Registry);
47 }
48 
49 void LLVMInitializeTarget(LLVMPassRegistryRef R) {
50   initializeTarget(*unwrap(R));
51 }
52 
53 LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep) {
54   return wrap(new DataLayout(StringRep));
55 }
56 
57 void LLVMAddTargetData(LLVMTargetDataRef TD, LLVMPassManagerRef PM) {
58   // The DataLayoutPass must now be in sync with the module. Unfortunatelly we
59   // cannot enforce that from the C api.
60   unwrap(PM)->add(new DataLayoutPass(*unwrap(TD)));
61 }
62 
63 void LLVMAddTargetLibraryInfo(LLVMTargetLibraryInfoRef TLI,
64                               LLVMPassManagerRef PM) {
65   unwrap(PM)->add(new TargetLibraryInfo(*unwrap(TLI)));
66 }
67 
68 char *LLVMCopyStringRepOfTargetData(LLVMTargetDataRef TD) {
69   std::string StringRep = unwrap(TD)->getStringRepresentation();
70   return strdup(StringRep.c_str());
71 }
72 
73 LLVMByteOrdering LLVMByteOrder(LLVMTargetDataRef TD) {
74   return unwrap(TD)->isLittleEndian() ? LLVMLittleEndian : LLVMBigEndian;
75 }
76 
77 unsigned LLVMPointerSize(LLVMTargetDataRef TD) {
78   return unwrap(TD)->getPointerSize(0);
79 }
80 
81 unsigned LLVMPointerSizeForAS(LLVMTargetDataRef TD, unsigned AS) {
82   return unwrap(TD)->getPointerSize(AS);
83 }
84 
85 LLVMTypeRef LLVMIntPtrType(LLVMTargetDataRef TD) {
86   return wrap(unwrap(TD)->getIntPtrType(getGlobalContext()));
87 }
88 
89 LLVMTypeRef LLVMIntPtrTypeForAS(LLVMTargetDataRef TD, unsigned AS) {
90   return wrap(unwrap(TD)->getIntPtrType(getGlobalContext(), AS));
91 }
92 
93 LLVMTypeRef LLVMIntPtrTypeInContext(LLVMContextRef C, LLVMTargetDataRef TD) {
94   return wrap(unwrap(TD)->getIntPtrType(*unwrap(C)));
95 }
96 
97 LLVMTypeRef LLVMIntPtrTypeForASInContext(LLVMContextRef C, LLVMTargetDataRef TD, unsigned AS) {
98   return wrap(unwrap(TD)->getIntPtrType(*unwrap(C), AS));
99 }
100 
101 unsigned long long LLVMSizeOfTypeInBits(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
102   return unwrap(TD)->getTypeSizeInBits(unwrap(Ty));
103 }
104 
105 unsigned long long LLVMStoreSizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
106   return unwrap(TD)->getTypeStoreSize(unwrap(Ty));
107 }
108 
109 unsigned long long LLVMABISizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
110   return unwrap(TD)->getTypeAllocSize(unwrap(Ty));
111 }
112 
113 unsigned LLVMABIAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
114   return unwrap(TD)->getABITypeAlignment(unwrap(Ty));
115 }
116 
117 unsigned LLVMCallFrameAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
118   return unwrap(TD)->getABITypeAlignment(unwrap(Ty));
119 }
120 
121 unsigned LLVMPreferredAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
122   return unwrap(TD)->getPrefTypeAlignment(unwrap(Ty));
123 }
124 
125 unsigned LLVMPreferredAlignmentOfGlobal(LLVMTargetDataRef TD,
126                                         LLVMValueRef GlobalVar) {
127   return unwrap(TD)->getPreferredAlignment(unwrap<GlobalVariable>(GlobalVar));
128 }
129 
130 unsigned LLVMElementAtOffset(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
131                              unsigned long long Offset) {
132   StructType *STy = unwrap<StructType>(StructTy);
133   return unwrap(TD)->getStructLayout(STy)->getElementContainingOffset(Offset);
134 }
135 
136 unsigned long long LLVMOffsetOfElement(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
137                                        unsigned Element) {
138   StructType *STy = unwrap<StructType>(StructTy);
139   return unwrap(TD)->getStructLayout(STy)->getElementOffset(Element);
140 }
141 
142 void LLVMDisposeTargetData(LLVMTargetDataRef TD) {
143   delete unwrap(TD);
144 }
145