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add some convenience methods for creating GEP instructions and

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struct types.  Patch by David Chisnall, with some tweaks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48531 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-03-19 05:06:05 +00:00
parent 7f40dea2f1
commit d8ff3caaa0
3 changed files with 24 additions and 0 deletions
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5
include/llvm/DerivedTypes.h
View File

@ -220,6 +220,11 @@ public:
static StructType *get(const std::vector<const Type*> &Params,
bool isPacked=false);
/// StructType::get - This static method is a convenience method for
/// creating structure types by specifying the elements as arguments. Note
/// that this method always returns a non-packed struct.
static StructType *get(const Type *type, ...) END_WITH_NULL;
// Iterator access to the elements
typedef Type::subtype_iterator element_iterator;
element_iterator element_begin() const { return ContainedTys; }

8
include/llvm/Support/LLVMBuilder.h
View File

@ -226,6 +226,14 @@ public:
GetElementPtrInst *CreateGEP(Value *Ptr, Value *Idx, const char *Name = "") {
return Insert(new GetElementPtrInst(Ptr, Idx, Name));
}
GetElementPtrInst *CreateStructGEP(Value *Ptr, unsigned Idx,
const char *Name = "") {
llvm::Value *Idxs[] = {
ConstantInt::get(llvm::Type::Int32Ty, 0),
ConstantInt::get(llvm::Type::Int32Ty, Idx)
};
return Insert(new GetElementPtrInst(Ptr, Idxs, Idxs+2, Name));
}
//===--------------------------------------------------------------------===//
// Instruction creation methods: Cast/Conversion Operators

11
lib/VMCore/Type.cpp
View File

@ -22,6 +22,7 @@
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Debug.h"
#include <algorithm>
#include <cstdarg>
using namespace llvm;
// DEBUG_MERGE_TYPES - Enable this #define to see how and when derived types are
@ -1247,6 +1248,16 @@ StructType *StructType::get(const std::vector<const Type*> &ETypes,
return ST;
}
StructType *StructType::get(const Type *type, ...) {
va_list ap;
std::vector<const llvm::Type*> StructFields;
va_start(ap, type);
do {
StructFields.push_back(type);
} while ((type = va_arg(ap, llvm::Type*)));
return llvm::StructType::get(StructFields);
}
//===----------------------------------------------------------------------===//