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80-cols; NFC

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llvm-svn: 225700
This commit is contained in:
Sanjay Patel 2015-01-12 21:21:28 +00:00
parent 8d76acfd64
commit 8a3043d80f
1 changed files with 13 additions and 13 deletions
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26
lib/Transforms/Scalar/GVN.cpp
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@ -2106,15 +2106,15 @@ bool GVN::propagateEquality(Value *LHS, Value *RHS,
std::swap(LHS, RHS);
assert((isa<Argument>(LHS) || isa<Instruction>(LHS)) && "Unexpected value!");
// If there is no obvious reason to prefer the left-hand side over the right-
// hand side, ensure the longest lived term is on the right-hand side, so the
// shortest lived term will be replaced by the longest lived. This tends to
// expose more simplifications.
// If there is no obvious reason to prefer the left-hand side over the
// right-hand side, ensure the longest lived term is on the right-hand side,
// so the shortest lived term will be replaced by the longest lived.
// This tends to expose more simplifications.
uint32_t LVN = VN.lookup_or_add(LHS);
if ((isa<Argument>(LHS) && isa<Argument>(RHS)) ||
(isa<Instruction>(LHS) && isa<Instruction>(RHS))) {
// Move the 'oldest' value to the right-hand side, using the value number as
// a proxy for age.
// Move the 'oldest' value to the right-hand side, using the value number
// as a proxy for age.
uint32_t RVN = VN.lookup_or_add(RHS);
if (LVN < RVN) {
std::swap(LHS, RHS);
@ -2143,10 +2143,10 @@ bool GVN::propagateEquality(Value *LHS, Value *RHS,
NumGVNEqProp += NumReplacements;
}
// Now try to deduce additional equalities from this one. For example, if the
// known equality was "(A != B)" == "false" then it follows that A and B are
// equal in the scope. Only boolean equalities with an explicit true or false
// RHS are currently supported.
// Now try to deduce additional equalities from this one. For example, if
// the known equality was "(A != B)" == "false" then it follows that A and B
// are equal in the scope. Only boolean equalities with an explicit true or
// false RHS are currently supported.
if (!RHS->getType()->isIntegerTy(1))
// Not a boolean equality - bail out.
continue;
@ -2188,9 +2188,9 @@ bool GVN::propagateEquality(Value *LHS, Value *RHS,
// If "A >= B" is known true, replace "A < B" with false everywhere.
CmpInst::Predicate NotPred = Cmp->getInversePredicate();
Constant *NotVal = ConstantInt::get(Cmp->getType(), isKnownFalse);
// Since we don't have the instruction "A < B" immediately to hand, work out
// the value number that it would have and use that to find an appropriate
// instruction (if any).
// Since we don't have the instruction "A < B" immediately to hand, work
// out the value number that it would have and use that to find an
// appropriate instruction (if any).
uint32_t NextNum = VN.getNextUnusedValueNumber();
uint32_t Num = VN.lookup_or_add_cmp(Cmp->getOpcode(), NotPred, Op0, Op1);
// If the number we were assigned was brand new then there is no point in