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https://github.com/c64scene-ar/llvm-6502.git
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[Reassociate] Add initial support for vector instructions.
This patch adds initial support for vector instructions to the reassociation pass. It enables most parts of the pass to work with vectors but to keep the size of the patch small, optimization of Xor trees, canonicalization of negative constants and converting shifts to muls, etc., have been left out. This will be handled in later patches. The patch is based on an initial patch by Chad Rosier. Differential Revision: http://reviews.llvm.org/D7566 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232190 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Robert Lougher
parent
011536a1cc
commit
4635abb065
@ -321,10 +321,8 @@ unsigned Reassociate::getRank(Value *V) {
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// If this is a not or neg instruction, do not count it for rank. This
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// assures us that X and ~X will have the same rank.
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Type *Ty = V->getType();
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if ((!Ty->isIntegerTy() && !Ty->isFloatingPointTy()) ||
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(!BinaryOperator::isNot(I) && !BinaryOperator::isNeg(I) &&
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!BinaryOperator::isFNeg(I)))
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if (!BinaryOperator::isNot(I) && !BinaryOperator::isNeg(I) &&
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!BinaryOperator::isFNeg(I))
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++Rank;
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DEBUG(dbgs() << "Calculated Rank[" << V->getName() << "] = " << Rank << "\n");
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@ -351,7 +349,7 @@ void Reassociate::canonicalizeOperands(Instruction *I) {
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static BinaryOperator *CreateAdd(Value *S1, Value *S2, const Twine &Name,
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Instruction *InsertBefore, Value *FlagsOp) {
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if (S1->getType()->isIntegerTy())
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if (S1->getType()->isIntOrIntVectorTy())
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return BinaryOperator::CreateAdd(S1, S2, Name, InsertBefore);
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else {
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BinaryOperator *Res =
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@ -363,7 +361,7 @@ static BinaryOperator *CreateAdd(Value *S1, Value *S2, const Twine &Name,
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static BinaryOperator *CreateMul(Value *S1, Value *S2, const Twine &Name,
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Instruction *InsertBefore, Value *FlagsOp) {
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if (S1->getType()->isIntegerTy())
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if (S1->getType()->isIntOrIntVectorTy())
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return BinaryOperator::CreateMul(S1, S2, Name, InsertBefore);
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else {
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BinaryOperator *Res =
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@ -375,7 +373,7 @@ static BinaryOperator *CreateMul(Value *S1, Value *S2, const Twine &Name,
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static BinaryOperator *CreateNeg(Value *S1, const Twine &Name,
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Instruction *InsertBefore, Value *FlagsOp) {
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if (S1->getType()->isIntegerTy())
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if (S1->getType()->isIntOrIntVectorTy())
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return BinaryOperator::CreateNeg(S1, Name, InsertBefore);
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else {
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BinaryOperator *Res = BinaryOperator::CreateFNeg(S1, Name, InsertBefore);
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@ -388,8 +386,8 @@ static BinaryOperator *CreateNeg(Value *S1, const Twine &Name,
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///
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static BinaryOperator *LowerNegateToMultiply(Instruction *Neg) {
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Type *Ty = Neg->getType();
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Constant *NegOne = Ty->isIntegerTy() ? ConstantInt::getAllOnesValue(Ty)
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: ConstantFP::get(Ty, -1.0);
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Constant *NegOne = Ty->isIntOrIntVectorTy() ?
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ConstantInt::getAllOnesValue(Ty) : ConstantFP::get(Ty, -1.0);
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BinaryOperator *Res = CreateMul(Neg->getOperand(1), NegOne, "", Neg, Neg);
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Neg->setOperand(1, Constant::getNullValue(Ty)); // Drop use of op.
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@ -872,7 +870,7 @@ void Reassociate::RewriteExprTree(BinaryOperator *I,
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Constant *Undef = UndefValue::get(I->getType());
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NewOp = BinaryOperator::Create(Instruction::BinaryOps(Opcode),
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Undef, Undef, "", I);
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if (NewOp->getType()->isFloatingPointTy())
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if (NewOp->getType()->isFPOrFPVectorTy())
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NewOp->setFastMathFlags(I->getFastMathFlags());
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} else {
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NewOp = NodesToRewrite.pop_back_val();
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@ -1520,8 +1518,8 @@ Value *Reassociate::OptimizeAdd(Instruction *I,
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// Insert a new multiply.
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Type *Ty = TheOp->getType();
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Constant *C = Ty->isIntegerTy() ? ConstantInt::get(Ty, NumFound)
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: ConstantFP::get(Ty, NumFound);
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Constant *C = Ty->isIntOrIntVectorTy() ?
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ConstantInt::get(Ty, NumFound) : ConstantFP::get(Ty, NumFound);
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Instruction *Mul = CreateMul(TheOp, C, "factor", I, I);
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// Now that we have inserted a multiply, optimize it. This allows us to
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@ -1661,7 +1659,7 @@ Value *Reassociate::OptimizeAdd(Instruction *I,
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// from an expression will drop a use of maxocc, and this can cause
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// RemoveFactorFromExpression on successive values to behave differently.
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Instruction *DummyInst =
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I->getType()->isIntegerTy()
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I->getType()->isIntOrIntVectorTy()
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? BinaryOperator::CreateAdd(MaxOccVal, MaxOccVal)
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: BinaryOperator::CreateFAdd(MaxOccVal, MaxOccVal);
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@ -1792,7 +1790,7 @@ static Value *buildMultiplyTree(IRBuilder<> &Builder,
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Value *LHS = Ops.pop_back_val();
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do {
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if (LHS->getType()->isIntegerTy())
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if (LHS->getType()->isIntOrIntVectorTy())
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LHS = Builder.CreateMul(LHS, Ops.pop_back_val());
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else
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LHS = Builder.CreateFMul(LHS, Ops.pop_back_val());
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@ -2090,8 +2088,9 @@ void Reassociate::OptimizeInst(Instruction *I) {
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if (I->isCommutative())
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canonicalizeOperands(I);
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// Don't optimize vector instructions.
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if (I->getType()->isVectorTy())
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// TODO: We should optimize vector Xor instructions, but they are
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// currently unsupported.
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if (I->getType()->isVectorTy() && I->getOpcode() == Instruction::Xor)
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return;
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// Don't optimize floating point instructions that don't have unsafe algebra.
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@ -2170,9 +2169,6 @@ void Reassociate::OptimizeInst(Instruction *I) {
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}
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void Reassociate::ReassociateExpression(BinaryOperator *I) {
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assert(!I->getType()->isVectorTy() &&
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"Reassociation of vector instructions is not supported.");
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// First, walk the expression tree, linearizing the tree, collecting the
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// operand information.
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SmallVector<RepeatedValue, 8> Tree;
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@ -1,46 +1,192 @@
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; RUN: opt < %s -reassociate -S | FileCheck %s
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; Canonicalize operands, but don't optimize floating point vector operations.
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define <4 x float> @test1() {
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; CHECK-LABEL: test1
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; CHECK-NEXT: %tmp1 = fsub fast <4 x float> zeroinitializer, zeroinitializer
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; CHECK-NEXT: %tmp2 = fmul fast <4 x float> %tmp1, zeroinitializer
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; Check that a*c+b*c is turned into (a+b)*c
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define <4 x float> @test1(<4 x float> %a, <4 x float> %b, <4 x float> %c) {
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; CHECK-LABEL: @test1
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; CHECK-NEXT: %tmp = fadd fast <4 x float> %b, %a
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; CHECK-NEXT: %tmp1 = fmul fast <4 x float> %tmp, %c
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; CHECK-NEXT: ret <4 x float> %tmp1
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%tmp1 = fsub fast <4 x float> zeroinitializer, zeroinitializer
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%tmp2 = fmul fast <4 x float> zeroinitializer, %tmp1
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ret <4 x float> %tmp2
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%mul = fmul fast <4 x float> %a, %c
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%mul1 = fmul fast <4 x float> %b, %c
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%add = fadd fast <4 x float> %mul, %mul1
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ret <4 x float> %add
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}
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; Commute integer vector operations.
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define <2 x i32> @test2(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: test2
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; CHECK-NEXT: %tmp1 = add <2 x i32> %x, %y
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; CHECK-NEXT: %tmp2 = add <2 x i32> %x, %y
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; CHECK-NEXT: %tmp3 = add <2 x i32> %tmp1, %tmp2
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; Check that a*a*b+a*a*c is turned into a*(a*(b+c)).
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define <2 x float> @test2(<2 x float> %a, <2 x float> %b, <2 x float> %c) {
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; CHECK-LABEL: @test2
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; CHECK-NEXT: fadd fast <2 x float> %c, %b
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; CHECK-NEXT: fmul fast <2 x float> %a, %tmp2
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; CHECK-NEXT: fmul fast <2 x float> %tmp3, %a
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; CHECK-NEXT: ret <2 x float>
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%tmp1 = add <2 x i32> %x, %y
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%tmp2 = add <2 x i32> %y, %x
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%tmp3 = add <2 x i32> %tmp1, %tmp2
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ret <2 x i32> %tmp3
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%t0 = fmul fast <2 x float> %a, %b
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%t1 = fmul fast <2 x float> %a, %t0
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%t2 = fmul fast <2 x float> %a, %c
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%t3 = fmul fast <2 x float> %a, %t2
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%t4 = fadd fast <2 x float> %t1, %t3
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ret <2 x float> %t4
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}
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define <2 x i32> @test3(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: test3
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; CHECK-NEXT: %tmp1 = mul <2 x i32> %x, %y
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; CHECK-NEXT: %tmp2 = mul <2 x i32> %x, %y
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; CHECK-NEXT: %tmp3 = mul <2 x i32> %tmp1, %tmp2
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; Check that a*b+a*c+d is turned into a*(b+c)+d.
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define <2 x double> @test3(<2 x double> %a, <2 x double> %b, <2 x double> %c, <2 x double> %d) {
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; CHECK-LABEL: @test3
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; CHECK-NEXT: fadd fast <2 x double> %c, %b
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; CHECK-NEXT: fmul fast <2 x double> %tmp, %a
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; CHECK-NEXT: fadd fast <2 x double> %tmp1, %d
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; CHECK-NEXT: ret <2 x double>
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%tmp1 = mul <2 x i32> %x, %y
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%tmp2 = mul <2 x i32> %y, %x
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%tmp3 = mul <2 x i32> %tmp1, %tmp2
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ret <2 x i32> %tmp3
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%t0 = fmul fast <2 x double> %a, %b
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%t1 = fmul fast <2 x double> %a, %c
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%t2 = fadd fast <2 x double> %t1, %d
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%t3 = fadd fast <2 x double> %t0, %t2
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ret <2 x double> %t3
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}
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define <2 x i32> @test4(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: test4
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; CHECK-NEXT: %tmp1 = and <2 x i32> %x, %y
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; CHECK-NEXT: %tmp2 = and <2 x i32> %x, %y
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; CHECK-NEXT: %tmp3 = and <2 x i32> %tmp1, %tmp2
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; No fast-math.
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define <2 x float> @test4(<2 x float> %A) {
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; CHECK-LABEL: @test4
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; CHECK-NEXT: %X = fadd <2 x float> %A, <float 1.000000e+00, float 1.000000e+00>
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; CHECK-NEXT: %Y = fadd <2 x float> %A, <float 1.000000e+00, float 1.000000e+00>
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; CHECK-NEXT: %R = fsub <2 x float> %X, %Y
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; CHECK-NEXT: ret <2 x float> %R
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%X = fadd <2 x float> %A, < float 1.000000e+00, float 1.000000e+00 >
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%Y = fadd <2 x float> %A, < float 1.000000e+00, float 1.000000e+00 >
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%R = fsub <2 x float> %X, %Y
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ret <2 x float> %R
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}
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; Check 47*X + 47*X -> 94*X.
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define <2 x float> @test5(<2 x float> %X) {
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; CHECK-LABEL: @test5
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; CHECK-NEXT: fmul fast <2 x float> %X, <float 9.400000e+01, float 9.400000e+01>
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; CHECK-NEXT: ret <2 x float>
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%Y = fmul fast <2 x float> %X, <float 4.700000e+01, float 4.700000e+01>
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%Z = fadd fast <2 x float> %Y, %Y
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ret <2 x float> %Z
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}
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; Check X+X+X -> 3*X.
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define <2 x float> @test6(<2 x float> %X) {
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; CHECK-LABEL: @test6
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; CHECK-NEXT: fmul fast <2 x float> %X, <float 3.000000e+00, float 3.000000e+00>
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; CHECK-NEXT: ret <2 x float>
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%Y = fadd fast <2 x float> %X ,%X
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%Z = fadd fast <2 x float> %Y, %X
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ret <2 x float> %Z
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}
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; Check 127*W+50*W -> 177*W.
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define <2 x double> @test7(<2 x double> %W) {
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; CHECK-LABEL: @test7
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; CHECK-NEXT: fmul fast <2 x double> %W, <double 1.770000e+02, double 1.770000e+02>
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; CHECK-NEXT: ret <2 x double>
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%X = fmul fast <2 x double> %W, <double 127.0, double 127.0>
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%Y = fmul fast <2 x double> %W, <double 50.0, double 50.0>
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%Z = fadd fast <2 x double> %Y, %X
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ret <2 x double> %Z
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}
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; Check X*12*12 -> X*144.
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define <2 x float> @test8(<2 x float> %arg) {
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; CHECK-LABEL: @test8
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; CHECK: fmul fast <2 x float> %arg, <float 1.440000e+02, float 1.440000e+02>
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; CHECK-NEXT: ret <2 x float> %tmp2
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%tmp1 = fmul fast <2 x float> <float 1.200000e+01, float 1.200000e+01>, %arg
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%tmp2 = fmul fast <2 x float> %tmp1, <float 1.200000e+01, float 1.200000e+01>
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ret <2 x float> %tmp2
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}
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; Check (b+(a+1234))+-a -> b+1234.
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define <2 x double> @test9(<2 x double> %b, <2 x double> %a) {
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; CHECK-LABEL: @test9
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; CHECK: fadd fast <2 x double> %b, <double 1.234000e+03, double 1.234000e+03>
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; CHECK-NEXT: ret <2 x double>
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%1 = fadd fast <2 x double> %a, <double 1.234000e+03, double 1.234000e+03>
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%2 = fadd fast <2 x double> %b, %1
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%3 = fsub fast <2 x double> <double 0.000000e+00, double 0.000000e+00>, %a
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%4 = fadd fast <2 x double> %2, %3
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ret <2 x double> %4
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}
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; Check -(-(z*40)*a) -> a*40*z.
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define <2 x float> @test10(<2 x float> %a, <2 x float> %b, <2 x float> %z) {
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; CHECK-LABEL: @test10
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; CHECK: fmul fast <2 x float> %a, <float 4.000000e+01, float 4.000000e+01>
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; CHECK-NEXT: fmul fast <2 x float> %e, %z
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; CHECK-NEXT: ret <2 x float>
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%d = fmul fast <2 x float> %z, <float 4.000000e+01, float 4.000000e+01>
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%c = fsub fast <2 x float> <float 0.000000e+00, float 0.000000e+00>, %d
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%e = fmul fast <2 x float> %a, %c
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%f = fsub fast <2 x float> <float 0.000000e+00, float 0.000000e+00>, %e
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ret <2 x float> %f
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}
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; Check x*y+y*x -> x*y*2.
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define <2 x double> @test11(<2 x double> %x, <2 x double> %y) {
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; CHECK-LABEL: @test11
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; CHECK-NEXT: %factor = fmul fast <2 x double> %y, <double 2.000000e+00, double 2.000000e+00>
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; CHECK-NEXT: %tmp1 = fmul fast <2 x double> %factor, %x
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; CHECK-NEXT: ret <2 x double> %tmp1
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%1 = fmul fast <2 x double> %x, %y
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%2 = fmul fast <2 x double> %y, %x
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%3 = fadd fast <2 x double> %1, %2
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ret <2 x double> %3
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}
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; FIXME: shifts should be converted to mul to assist further reassociation.
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define <2 x i64> @test12(<2 x i64> %b, <2 x i64> %c) {
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; CHECK-LABEL: @test12
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; CHECK-NEXT: %mul = mul <2 x i64> %c, %b
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; CHECK-NEXT: %shl = shl <2 x i64> %mul, <i64 5, i64 5>
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; CHECK-NEXT: ret <2 x i64> %shl
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%mul = mul <2 x i64> %c, %b
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%shl = shl <2 x i64> %mul, <i64 5, i64 5>
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ret <2 x i64> %shl
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}
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; FIXME: expressions with a negative const should be canonicalized to assist
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; further reassociation.
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; We would expect (-5*b)+a -> a-(5*b) but only the constant operand is commuted.
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define <4 x float> @test13(<4 x float> %a, <4 x float> %b) {
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; CHECK-LABEL: @test13
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; CHECK-NEXT: %mul = fmul fast <4 x float> %b, <float -5.000000e+00, float -5.000000e+00, float -5.000000e+00, float -5.000000e+00>
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; CHECK-NEXT: %add = fadd fast <4 x float> %mul, %a
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; CHECK-NEXT: ret <4 x float> %add
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%mul = fmul fast <4 x float> <float -5.000000e+00, float -5.000000e+00, float -5.000000e+00, float -5.000000e+00>, %b
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%add = fadd fast <4 x float> %mul, %a
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ret <4 x float> %add
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}
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; Break up subtract to assist further reassociation.
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; Check a+b-c -> a+b+-c.
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define <2 x i64> @test14(<2 x i64> %a, <2 x i64> %b, <2 x i64> %c) {
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; CHECK-LABEL: @test14
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; CHECK-NEXT: %add = add <2 x i64> %b, %a
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; CHECK-NEXT: %c.neg = sub <2 x i64> zeroinitializer, %c
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; CHECK-NEXT: %sub = add <2 x i64> %add, %c.neg
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; CHECK-NEXT: ret <2 x i64> %sub
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%add = add <2 x i64> %b, %a
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%sub = sub <2 x i64> %add, %c
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ret <2 x i64> %sub
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}
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define <2 x i32> @test15(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: test15
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; CHECK-NEXT: %tmp3 = and <2 x i32> %y, %x
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; CHECK-NEXT: ret <2 x i32> %tmp3
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%tmp1 = and <2 x i32> %x, %y
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%tmp2 = and <2 x i32> %y, %x
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@ -48,11 +194,10 @@ define <2 x i32> @test4(<2 x i32> %x, <2 x i32> %y) {
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ret <2 x i32> %tmp3
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}
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define <2 x i32> @test5(<2 x i32> %x, <2 x i32> %y) {
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; CHECK-LABEL: test5
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; CHECK-NEXT: %tmp1 = or <2 x i32> %x, %y
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; CHECK-NEXT: %tmp2 = or <2 x i32> %x, %y
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; CHECK-NEXT: %tmp3 = or <2 x i32> %tmp1, %tmp2
|
||||
define <2 x i32> @test16(<2 x i32> %x, <2 x i32> %y) {
|
||||
; CHECK-LABEL: test16
|
||||
; CHECK-NEXT: %tmp3 = or <2 x i32> %y, %x
|
||||
; CHECK-NEXT: ret <2 x i32> %tmp3
|
||||
|
||||
%tmp1 = or <2 x i32> %x, %y
|
||||
%tmp2 = or <2 x i32> %y, %x
|
||||
@ -60,8 +205,9 @@ define <2 x i32> @test5(<2 x i32> %x, <2 x i32> %y) {
|
||||
ret <2 x i32> %tmp3
|
||||
}
|
||||
|
||||
define <2 x i32> @test6(<2 x i32> %x, <2 x i32> %y) {
|
||||
; CHECK-LABEL: test6
|
||||
; FIXME: Optimize vector xor. Currently only commute operands.
|
||||
define <2 x i32> @test17(<2 x i32> %x, <2 x i32> %y) {
|
||||
; CHECK-LABEL: test17
|
||||
; CHECK-NEXT: %tmp1 = xor <2 x i32> %x, %y
|
||||
; CHECK-NEXT: %tmp2 = xor <2 x i32> %x, %y
|
||||
; CHECK-NEXT: %tmp3 = xor <2 x i32> %tmp1, %tmp2
|
||||
|
||||
Loading…
Reference in New Issue
Block a user