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Add support for accessing an MDNode's operands via the C binding. Patch by

Browse Source 
Anthony Bryant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164247 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2012-09-19 20:29:39 +00:00
parent 6c9176aeec
commit 4caf5281bf
2 changed files with 34 additions and 0 deletions
include/llvm-c
Core.h
lib/VMCore
Core.cpp

21
include/llvm-c/Core.h

@ -1868,6 +1868,27 @@ LLVMValueRef LLVMMDNode(LLVMValueRef *Vals, unsigned Count);
*/
const char *LLVMGetMDString(LLVMValueRef V, unsigned* Len);
/**
* Obtain the number of operands from an MDNode value.
*
* @param V MDNode to get number of operands from.
* @return Number of operands of the MDNode.
*/
unsigned LLVMGetMDNodeNumOperands(LLVMValueRef V);
/**
* Obtain the given MDNode's operands.
*
* The passed LLVMValueRef pointer should point to enough memory to hold all of
* the operands of the given MDNode (see LLVMGetMDNodeNumOperands) as
* LLVMValueRefs. This memory will be populated with the LLVMValueRefs of the
* MDNode's operands.
*
* @param V MDNode to get the operands from.
* @param Dest Destination array for operands.
*/
void LLVMGetMDNodeOperands(LLVMValueRef V, LLVMValueRef *Dest);
/**
* @}
*/

13
lib/VMCore/Core.cpp

@ -568,6 +568,19 @@ const char *LLVMGetMDString(LLVMValueRef V, unsigned* Len) {
return 0;
}
unsigned LLVMGetMDNodeNumOperands(LLVMValueRef V)
{
return cast<MDNode>(unwrap(V))->getNumOperands();
}
void LLVMGetMDNodeOperands(LLVMValueRef V, LLVMValueRef *Dest)
{
const MDNode *N = cast<MDNode>(unwrap(V));
const unsigned numOperands = N->getNumOperands();
for (unsigned i = 0; i < numOperands; i++)
Dest[i] = wrap(N->getOperand(i));
}
unsigned LLVMGetNamedMetadataNumOperands(LLVMModuleRef M, const char* name)
{
if (NamedMDNode *N = unwrap(M)->getNamedMetadata(name)) {