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[Loop Utils] Move utilty addStringMetadataToLoop to LoopUtils.cpp. NFC.

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Just move the utility function to LoopUtils.cpp to re-use it in loop peeling.

Reviewers: reames, Ashutosh
Reviewed By: reames
Subscribers: hiraditya, asbirlea, llvm-commits
Differential Revision: https://reviews.llvm.org/D65264

llvm-svn: 367085
This commit is contained in:
Serguei Katkov 2019-07-26 06:10:08 +00:00
parent c50302a8a1
commit 60edd04498
2 changed files with 31 additions and 31 deletions
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31
lib/Transforms/Scalar/LoopVersioningLICM.cpp
View File

@ -112,37 +112,6 @@ static cl::opt<unsigned> LVLoopDepthThreshold(
"LoopVersioningLICM's threshold for maximum allowed loop nest/depth"),
cl::init(2), cl::Hidden);
/// Create MDNode for input string.
static MDNode *createStringMetadata(Loop *TheLoop, StringRef Name, unsigned V) {
LLVMContext &Context = TheLoop->getHeader()->getContext();
Metadata *MDs[] = {
MDString::get(Context, Name),
ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), V))};
return MDNode::get(Context, MDs);
}
/// Set input string into loop metadata by keeping other values intact.
void llvm::addStringMetadataToLoop(Loop *TheLoop, const char *MDString,
unsigned V) {
SmallVector<Metadata *, 4> MDs(1);
// If the loop already has metadata, retain it.
MDNode *LoopID = TheLoop->getLoopID();
if (LoopID) {
for (unsigned i = 1, ie = LoopID->getNumOperands(); i < ie; ++i) {
MDNode *Node = cast<MDNode>(LoopID->getOperand(i));
MDs.push_back(Node);
}
}
// Add new metadata.
MDs.push_back(createStringMetadata(TheLoop, MDString, V));
// Replace current metadata node with new one.
LLVMContext &Context = TheLoop->getHeader()->getContext();
MDNode *NewLoopID = MDNode::get(Context, MDs);
// Set operand 0 to refer to the loop id itself.
NewLoopID->replaceOperandWith(0, NewLoopID);
TheLoop->setLoopID(NewLoopID);
}
namespace {
struct LoopVersioningLICM : public LoopPass {

31
lib/Transforms/Utils/LoopUtils.cpp
View File

@ -191,6 +191,37 @@ void llvm::initializeLoopPassPass(PassRegistry &Registry) {
INITIALIZE_PASS_DEPENDENCY(ScalarEvolutionWrapperPass)
}
/// Create MDNode for input string.
static MDNode *createStringMetadata(Loop *TheLoop, StringRef Name, unsigned V) {
LLVMContext &Context = TheLoop->getHeader()->getContext();
Metadata *MDs[] = {
MDString::get(Context, Name),
ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(Context), V))};
return MDNode::get(Context, MDs);
}
/// Set input string into loop metadata by keeping other values intact.
void llvm::addStringMetadataToLoop(Loop *TheLoop, const char *MDString,
unsigned V) {
SmallVector<Metadata *, 4> MDs(1);
// If the loop already has metadata, retain it.
MDNode *LoopID = TheLoop->getLoopID();
if (LoopID) {
for (unsigned i = 1, ie = LoopID->getNumOperands(); i < ie; ++i) {
MDNode *Node = cast<MDNode>(LoopID->getOperand(i));
MDs.push_back(Node);
}
}
// Add new metadata.
MDs.push_back(createStringMetadata(TheLoop, MDString, V));
// Replace current metadata node with new one.
LLVMContext &Context = TheLoop->getHeader()->getContext();
MDNode *NewLoopID = MDNode::get(Context, MDs);
// Set operand 0 to refer to the loop id itself.
NewLoopID->replaceOperandWith(0, NewLoopID);
TheLoop->setLoopID(NewLoopID);
}
/// Find string metadata for loop
///
/// If it has a value (e.g. {"llvm.distribute", 1} return the value as an