6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-01 15:11:24 +00:00
Code Issues Projects Releases Wiki Activity

Add a fast path for setName("") on an unnamed value.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79492 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2009-08-19 23:37:23 +00:00
parent 7a7be366a7
commit 5149932068
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/llvm/ADT/Twine.h
View File

@ -320,6 +320,16 @@ namespace llvm {
return Twine(&Val, UHexKind, 0, EmptyKind);
}
/// @}
/// @name Predicate Operations
/// @{
/// isTriviallyEmpty - Check if this twine is trivially empty; a false
/// return value does not necessarily mean the twine is empty.
bool isTriviallyEmpty() const {
return isNullary();
}
/// @}
/// @name String Operations
/// @{

4
lib/VMCore/Value.cpp
View File

@ -171,6 +171,10 @@ std::string Value::getNameStr() const {
}
void Value::setName(const Twine &NewName) {
// Fast path for common IRBuilder case of setName("") when there is no name.
if (NewName.isTriviallyEmpty() && !hasName())
return;
SmallString<256> NameData;
NewName.toVector(NameData);