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Add a way to grab a particular attribute out of a DIE.

Browse Source 
Use it when we're looking for a string in particular. Update comments
as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187844 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2013-08-07 01:18:33 +00:00
parent 028f3478a5
commit b7669139e6
3 changed files with 21 additions and 13 deletions
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12
lib/CodeGen/AsmPrinter/DIE.cpp
View File

@ -122,6 +122,18 @@ DIE *DIE::getCompileUnit() {
llvm_unreachable("We should not have orphaned DIEs.");
}
DIEValue *DIE::findAttribute(unsigned Attribute) {
const SmallVectorImpl<DIEValue *> &Values = getValues();
const DIEAbbrev &Abbrevs = getAbbrev();
// Iterate through all the attributes until we find the one we're
// looking for, if we can't find it return NULL.
for (size_t i = 0; i < Values.size(); ++i)
if (Abbrevs.getData()[i].getAttribute() == Attribute)
return Values[i];
return NULL;
}
#ifndef NDEBUG
void DIE::print(raw_ostream &O, unsigned IndentCount) const {
const std::string Indent(IndentCount, ' ');

4
lib/CodeGen/AsmPrinter/DIE.h
View File

@ -175,6 +175,10 @@ namespace llvm {
Child->Parent = this;
}
/// findAttribute - Find a value in the DIE with the attribute given, returns NULL
/// if no such attribute exists.
DIEValue *findAttribute(unsigned Attribute);
#ifndef NDEBUG
void print(raw_ostream &O, unsigned IndentCount = 0) const;
void dump();

18
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -966,21 +966,13 @@ void DwarfDebug::collectDeadVariables() {
typedef ArrayRef<uint8_t> HashValue;
/// \brief Grabs the string in whichever attribute is passed in and returns
/// a reference to it.
/// a reference to it. Returns "" if the attribute doesn't exist.
static StringRef getDIEStringAttr(DIE *Die, unsigned Attr) {
const SmallVectorImpl<DIEValue *> &Values = Die->getValues();
const DIEAbbrev &Abbrevs = Die->getAbbrev();
DIEValue *V = Die->findAttribute(Attr);
if (DIEString *S = dyn_cast_or_null<DIEString>(V))
return S->getString();
// Iterate through all the attributes until we find the one we're
// looking for, if we can't find it return an empty string.
for (size_t i = 0; i < Values.size(); ++i) {
if (Abbrevs.getData()[i].getAttribute() == Attr) {
DIEValue *V = Values[i];
assert(isa<DIEString>(V) && "String requested. Not a string.");
DIEString *S = cast<DIEString>(V);
return S->getString();
}
}
return StringRef("");
}