Make makeLoopInvariant report whether it made any changes or not,
and use this to simplify more code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75722 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LoopInfo.cpp b/lib/Analysis/LoopInfo.cpp
index fb8027c..63de1aa 100644
--- a/lib/Analysis/LoopInfo.cpp
+++ b/lib/Analysis/LoopInfo.cpp
@@ -58,9 +58,10 @@
/// If InsertPt is specified, it is the point to hoist instructions to.
/// If null, the terminator of the loop preheader is used.
///
-bool Loop::makeLoopInvariant(Value *V, Instruction *InsertPt) const {
+bool Loop::makeLoopInvariant(Value *V, bool &Changed,
+ Instruction *InsertPt) const {
if (Instruction *I = dyn_cast<Instruction>(V))
- return makeLoopInvariant(I);
+ return makeLoopInvariant(I, Changed, InsertPt);
return true; // All non-instructions are loop-invariant.
}
@@ -73,7 +74,8 @@
/// If InsertPt is specified, it is the point to hoist instructions to.
/// If null, the terminator of the loop preheader is used.
///
-bool Loop::makeLoopInvariant(Instruction *I, Instruction *InsertPt) const {
+bool Loop::makeLoopInvariant(Instruction *I, bool &Changed,
+ Instruction *InsertPt) const {
// Test if the value is already loop-invariant.
if (isLoopInvariant(I))
return true;
@@ -96,10 +98,11 @@
}
// Don't hoist instructions with loop-variant operands.
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i)
- if (!makeLoopInvariant(I->getOperand(i), InsertPt))
+ if (!makeLoopInvariant(I->getOperand(i), Changed, InsertPt))
return false;
// Hoist.
I->moveBefore(InsertPt);
+ Changed = true;
return true;
}