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-rw-r--r--lib/Transforms/Scalar/Reassociate.cpp39
1 files changed, 22 insertions, 17 deletions
diff --git a/lib/Transforms/Scalar/Reassociate.cpp b/lib/Transforms/Scalar/Reassociate.cpp
index 2877852d3d..9456940809 100644
--- a/lib/Transforms/Scalar/Reassociate.cpp
+++ b/lib/Transforms/Scalar/Reassociate.cpp
@@ -200,8 +200,8 @@ static BinaryOperator *isReassociableOp(Value *V, unsigned Opcode) {
///
static Instruction *LowerNegateToMultiply(Instruction *Neg,
std::map<AssertingVH<>, unsigned> &ValueRankMap,
- LLVMContext *Context) {
- Constant *Cst = Context->getAllOnesValue(Neg->getType());
+ LLVMContext &Context) {
+ Constant *Cst = Neg->getContext().getAllOnesValue(Neg->getType());
Instruction *Res = BinaryOperator::CreateMul(Neg->getOperand(1), Cst, "",Neg);
ValueRankMap.erase(Neg);
@@ -256,6 +256,7 @@ void Reassociate::LinearizeExprTree(BinaryOperator *I,
std::vector<ValueEntry> &Ops) {
Value *LHS = I->getOperand(0), *RHS = I->getOperand(1);
unsigned Opcode = I->getOpcode();
+ LLVMContext &Context = I->getContext();
// First step, linearize the expression if it is in ((A+B)+(C+D)) form.
BinaryOperator *LHSBO = isReassociableOp(LHS, Opcode);
@@ -284,8 +285,8 @@ void Reassociate::LinearizeExprTree(BinaryOperator *I,
Ops.push_back(ValueEntry(getRank(RHS), RHS));
// Clear the leaves out.
- I->setOperand(0, Context->getUndef(I->getType()));
- I->setOperand(1, Context->getUndef(I->getType()));
+ I->setOperand(0, Context.getUndef(I->getType()));
+ I->setOperand(1, Context.getUndef(I->getType()));
return;
} else {
// Turn X+(Y+Z) -> (Y+Z)+X
@@ -320,7 +321,7 @@ void Reassociate::LinearizeExprTree(BinaryOperator *I,
Ops.push_back(ValueEntry(getRank(RHS), RHS));
// Clear the RHS leaf out.
- I->setOperand(1, Context->getUndef(I->getType()));
+ I->setOperand(1, Context.getUndef(I->getType()));
}
// RewriteExprTree - Now that the operands for this expression tree are
@@ -373,7 +374,7 @@ void Reassociate::RewriteExprTree(BinaryOperator *I,
// version of the value is returned, and BI is left pointing at the instruction
// that should be processed next by the reassociation pass.
//
-static Value *NegateValue(LLVMContext *Context, Value *V, Instruction *BI) {
+static Value *NegateValue(LLVMContext &Context, Value *V, Instruction *BI) {
// We are trying to expose opportunity for reassociation. One of the things
// that we want to do to achieve this is to push a negation as deep into an
// expression chain as possible, to expose the add instructions. In practice,
@@ -402,12 +403,12 @@ static Value *NegateValue(LLVMContext *Context, Value *V, Instruction *BI) {
// Insert a 'neg' instruction that subtracts the value from zero to get the
// negation.
//
- return BinaryOperator::CreateNeg(*Context, V, V->getName() + ".neg", BI);
+ return BinaryOperator::CreateNeg(Context, V, V->getName() + ".neg", BI);
}
/// ShouldBreakUpSubtract - Return true if we should break up this subtract of
/// X-Y into (X + -Y).
-static bool ShouldBreakUpSubtract(LLVMContext *Context, Instruction *Sub) {
+static bool ShouldBreakUpSubtract(LLVMContext &Context, Instruction *Sub) {
// If this is a negation, we can't split it up!
if (BinaryOperator::isNeg(Sub))
return false;
@@ -431,7 +432,7 @@ static bool ShouldBreakUpSubtract(LLVMContext *Context, Instruction *Sub) {
/// BreakUpSubtract - If we have (X-Y), and if either X is an add, or if this is
/// only used by an add, transform this into (X+(0-Y)) to promote better
/// reassociation.
-static Instruction *BreakUpSubtract(LLVMContext *Context, Instruction *Sub,
+static Instruction *BreakUpSubtract(LLVMContext &Context, Instruction *Sub,
std::map<AssertingVH<>, unsigned> &ValueRankMap) {
// Convert a subtract into an add and a neg instruction... so that sub
// instructions can be commuted with other add instructions...
@@ -458,16 +459,16 @@ static Instruction *BreakUpSubtract(LLVMContext *Context, Instruction *Sub,
/// reassociation.
static Instruction *ConvertShiftToMul(Instruction *Shl,
std::map<AssertingVH<>, unsigned> &ValueRankMap,
- LLVMContext *Context) {
+ LLVMContext &Context) {
// If an operand of this shift is a reassociable multiply, or if the shift
// is used by a reassociable multiply or add, turn into a multiply.
if (isReassociableOp(Shl->getOperand(0), Instruction::Mul) ||
(Shl->hasOneUse() &&
(isReassociableOp(Shl->use_back(), Instruction::Mul) ||
isReassociableOp(Shl->use_back(), Instruction::Add)))) {
- Constant *MulCst = Context->getConstantInt(Shl->getType(), 1);
+ Constant *MulCst = Context.getConstantInt(Shl->getType(), 1);
MulCst =
- Context->getConstantExprShl(MulCst, cast<Constant>(Shl->getOperand(1)));
+ Context.getConstantExprShl(MulCst, cast<Constant>(Shl->getOperand(1)));
Instruction *Mul = BinaryOperator::CreateMul(Shl->getOperand(0), MulCst,
"", Shl);
@@ -562,12 +563,14 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
bool IterateOptimization = false;
if (Ops.size() == 1) return Ops[0].Op;
+ LLVMContext &Context = I->getContext();
+
unsigned Opcode = I->getOpcode();
if (Constant *V1 = dyn_cast<Constant>(Ops[Ops.size()-2].Op))
if (Constant *V2 = dyn_cast<Constant>(Ops.back().Op)) {
Ops.pop_back();
- Ops.back().Op = Context->getConstantExpr(Opcode, V1, V2);
+ Ops.back().Op = Context.getConstantExpr(Opcode, V1, V2);
return OptimizeExpression(I, Ops);
}
@@ -623,10 +626,10 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
if (FoundX != i) {
if (Opcode == Instruction::And) { // ...&X&~X = 0
++NumAnnihil;
- return Context->getNullValue(X->getType());
+ return Context.getNullValue(X->getType());
} else if (Opcode == Instruction::Or) { // ...|X|~X = -1
++NumAnnihil;
- return Context->getAllOnesValue(X->getType());
+ return Context.getAllOnesValue(X->getType());
}
}
}
@@ -645,7 +648,7 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
assert(Opcode == Instruction::Xor);
if (e == 2) {
++NumAnnihil;
- return Context->getNullValue(Ops[0].Op->getType());
+ return Context.getNullValue(Ops[0].Op->getType());
}
// ... X^X -> ...
Ops.erase(Ops.begin()+i, Ops.begin()+i+2);
@@ -670,7 +673,7 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
// Remove X and -X from the operand list.
if (Ops.size() == 2) {
++NumAnnihil;
- return Context->getNullValue(X->getType());
+ return Context.getNullValue(X->getType());
} else {
Ops.erase(Ops.begin()+i);
if (i < FoundX)
@@ -781,6 +784,8 @@ Value *Reassociate::OptimizeExpression(BinaryOperator *I,
/// ReassociateBB - Inspect all of the instructions in this basic block,
/// reassociating them as we go.
void Reassociate::ReassociateBB(BasicBlock *BB) {
+ LLVMContext &Context = BB->getContext();
+
for (BasicBlock::iterator BBI = BB->begin(); BBI != BB->end(); ) {
Instruction *BI = BBI++;
if (BI->getOpcode() == Instruction::Shl &&
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 01:16:47 +0000