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[TI removal] Test predicate rather than casting to detect a terminator 

and use the range based successor API.

llvm-svn: 344730
This commit is contained in:
Chandler Carruth 2018-10-18 08:16:20 +00:00
parent 64c92df7cb
commit 4aaaaabe87
1 changed files with 5 additions and 4 deletions
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9
clang/lib/CodeGen/CGLoopInfo.cpp
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@ -12,6 +12,7 @@
#include "clang/AST/Attr.h"
#include "clang/Sema/LoopHint.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instructions.h"
@ -335,10 +336,10 @@ void LoopInfoStack::InsertHelper(Instruction *I) const {
if (!L.getLoopID())
return;
if (TerminatorInst *TI = dyn_cast<TerminatorInst>(I)) {
for (unsigned i = 0, ie = TI->getNumSuccessors(); i < ie; ++i)
if (TI->getSuccessor(i) == L.getHeader()) {
TI->setMetadata(llvm::LLVMContext::MD_loop, L.getLoopID());
if (I->isTerminator()) {
for (BasicBlock *Succ : successors(I))
if (Succ == L.getHeader()) {
I->setMetadata(llvm::LLVMContext::MD_loop, L.getLoopID());
break;
}
return;