RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-22 10:42:39 +01:00
Code Issues Projects Releases Wiki Activity

[IR] Optimize no-op removal from AttributeList (NFC)

Browse Source 
When removing an AttrBuilder from an index of an AttributeList,
directly return the original list if no attributes were actually
removed.
This commit is contained in:
Nikita Popov 2021-05-22 15:03:29 +02:00
parent 632878de15
commit 66053da05c
1 changed files with 6 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
lib/IR/Attributes.cpp
View File

@ -1484,17 +1484,12 @@ AttributeList AttributeList::removeAttribute(LLVMContext &C, unsigned Index,
AttributeList
AttributeList::removeAttributes(LLVMContext &C, unsigned Index,
const AttrBuilder &AttrsToRemove) const {
if (!pImpl)
return {};
Index = attrIdxToArrayIdx(Index);
SmallVector<AttributeSet, 4> AttrSets(this->begin(), this->end());
if (Index >= AttrSets.size())
AttrSets.resize(Index + 1);
AttrSets[Index] = AttrSets[Index].removeAttributes(C, AttrsToRemove);
return getImpl(C, AttrSets);
AttributeSet Attrs = getAttributes(Index);
AttributeSet NewAttrs = Attrs.removeAttributes(C, AttrsToRemove);
// If nothing was removed, return the original list.
if (Attrs == NewAttrs)
return *this;
return setAttributes(C, Index, NewAttrs);
}
AttributeList AttributeList::removeAttributes(LLVMContext &C,