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[C API] Fix several null pointer dereferences.

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llvm-svn: 286704
This commit is contained in:
whitequark 2016-11-12 03:38:23 +00:00
parent 0a17a3957b
commit 056dace0da
1 changed files with 8 additions and 0 deletions
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8
lib/IR/Core.cpp
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@ -1842,12 +1842,16 @@ void LLVMAddAttributeAtIndex(LLVMValueRef F, LLVMAttributeIndex Idx,
unsigned LLVMGetAttributeCountAtIndex(LLVMValueRef F, LLVMAttributeIndex Idx) {
auto *ASN = AttributeSetNode::get(unwrap<Function>(F)->getAttributes(), Idx);
if (!ASN)
return 0;
return ASN->getNumAttributes();
}
void LLVMGetAttributesAtIndex(LLVMValueRef F, LLVMAttributeIndex Idx,
LLVMAttributeRef *Attrs) {
auto *ASN = AttributeSetNode::get(unwrap<Function>(F)->getAttributes(), Idx);
if (!ASN)
return;
for (auto A: make_range(ASN->begin(), ASN->end()))
*Attrs++ = wrap(A);
}
@ -2173,6 +2177,8 @@ unsigned LLVMGetCallSiteAttributeCount(LLVMValueRef C,
LLVMAttributeIndex Idx) {
auto CS = CallSite(unwrap<Instruction>(C));
auto *ASN = AttributeSetNode::get(CS.getAttributes(), Idx);
if (!ASN)
return 0;
return ASN->getNumAttributes();
}
@ -2180,6 +2186,8 @@ void LLVMGetCallSiteAttributes(LLVMValueRef C, LLVMAttributeIndex Idx,
LLVMAttributeRef *Attrs) {
auto CS = CallSite(unwrap<Instruction>(C));
auto *ASN = AttributeSetNode::get(CS.getAttributes(), Idx);
if (!ASN)
return;
for (auto A: make_range(ASN->begin(), ASN->end()))
*Attrs++ = wrap(A);
}