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pull a simple method out of LICM into a new

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Loop::hasLoopInvariantOperands method. Remove
a useless and confusing Loop::isLoopInvariant(Instruction)
method, which didn't do what you thought it did.

No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113133 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-09-06 01:05:37 +00:00
parent 03d1063d32
commit adc799112d
3 changed files with 14 additions and 26 deletions
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lib/Analysis/LoopInfo.cpp
+10 -6
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@@ -48,15 +48,18 @@ INITIALIZE_PASS(LoopInfo, "loops", "Natural Loop Information", true, true);
///
bool Loop::isLoopInvariant(Value *V) const {
if (Instruction *I = dyn_cast<Instruction>(V))
return isLoopInvariant(I);
return !contains(I);
return true; // All non-instructions are loop invariant
}
/// isLoopInvariant - Return true if the specified instruction is
/// loop-invariant.
///
bool Loop::isLoopInvariant(Instruction *I) const {
return !contains(I);
/// hasLoopInvariantOperands - Return true if all the operands of the
/// specified instruction are loop invariant.
bool Loop::hasLoopInvariantOperands(Instruction *I) const {
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i)
if (!isLoopInvariant(I->getOperand(i)))
return false;
return true;
}
/// makeLoopInvariant - If the given value is an instruciton inside of the
@@ -105,6 +108,7 @@ bool Loop::makeLoopInvariant(Instruction *I, bool &Changed,
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i)
if (!makeLoopInvariant(I->getOperand(i), Changed, InsertPt))
return false;
// Hoist.
I->moveBefore(InsertPt);
Changed = true;