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SLPVectorizer: vectorize compares and selects.

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llvm-svn: 184282
This commit is contained in:
Nadav Rotem 2013-06-19 05:49:52 +00:00
parent 9accad7fa1
commit 61c4560eab
2 changed files with 107 additions and 3 deletions
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78
lib/Transforms/Vectorize/VecUtils.cpp
View File

@ -384,6 +384,9 @@ void BoUpSLP::getTreeUses_rec(ArrayRef<Value *> VL, unsigned Depth) {
case Instruction::Trunc:
case Instruction::FPTrunc:
case Instruction::BitCast:
case Instruction::Select:
case Instruction::ICmp:
case Instruction::FCmp:
case Instruction::Add:
case Instruction::FAdd:
case Instruction::Sub:
@ -541,6 +544,18 @@ int BoUpSLP::getTreeCost_rec(ArrayRef<Value *> VL, unsigned Depth) {
Cost += (VecCost - ScalarCost);
return Cost;
}
case Instruction::FCmp:
case Instruction::ICmp: {
// Check that all of the compares have the same predicate.
CmpInst::Predicate P0 = dyn_cast<CmpInst>(VL0)->getPredicate();
for (unsigned i = 1, e = VL.size(); i < e; ++i) {
CmpInst *Cmp = cast<CmpInst>(VL[i]);
if (Cmp->getPredicate() != P0)
return getScalarizationCost(VecTy);
}
// Fall through.
}
case Instruction::Select:
case Instruction::Add:
case Instruction::FAdd:
case Instruction::Sub:
@ -572,10 +587,19 @@ int BoUpSLP::getTreeCost_rec(ArrayRef<Value *> VL, unsigned Depth) {
}
// Calculate the cost of this instruction.
int ScalarCost = VecTy->getNumElements() *
int ScalarCost = 0;
int VecCost = 0;
if (Opcode == Instruction::FCmp || Opcode == Instruction::ICmp ||
Opcode == Instruction::Select) {
VectorType *MaskTy = VectorType::get(Builder.getInt1Ty(), VL.size());
ScalarCost = VecTy->getNumElements() *
TTI->getCmpSelInstrCost(Opcode, ScalarTy, Builder.getInt1Ty());
VecCost = TTI->getCmpSelInstrCost(Opcode, VecTy, MaskTy);
} else {
ScalarCost = VecTy->getNumElements() *
TTI->getArithmeticInstrCost(Opcode, ScalarTy);
int VecCost = TTI->getArithmeticInstrCost(Opcode, VecTy);
VecCost = TTI->getArithmeticInstrCost(Opcode, VecTy);
}
Cost += (VecCost - ScalarCost);
return Cost;
}
@ -772,6 +796,54 @@ Value *BoUpSLP::vectorizeTree_rec(ArrayRef<Value *> VL, int VF) {
return V;
}
case Instruction::FCmp:
case Instruction::ICmp: {
// Check that all of the compares have the same predicate.
CmpInst::Predicate P0 = dyn_cast<CmpInst>(VL0)->getPredicate();
for (unsigned i = 1, e = VF; i < e; ++i) {
CmpInst *Cmp = cast<CmpInst>(VL[i]);
if (Cmp->getPredicate() != P0)
return Scalarize(VL, VecTy);
}
ValueList LHSV, RHSV;
for (int i = 0; i < VF; ++i) {
LHSV.push_back(cast<Instruction>(VL[i])->getOperand(0));
RHSV.push_back(cast<Instruction>(VL[i])->getOperand(1));
}
Value *L = vectorizeTree_rec(LHSV, VF);
Value *R = vectorizeTree_rec(RHSV, VF);
Value *V;
if (VL0->getOpcode() == Instruction::FCmp)
V = Builder.CreateFCmp(P0, L, R);
else
V = Builder.CreateICmp(P0, L, R);
for (int i = 0; i < VF; ++i)
VectorizedValues[VL[i]] = V;
return V;
}
case Instruction::Select: {
ValueList TrueVec, FalseVec, CondVec;
for (int i = 0; i < VF; ++i) {
CondVec.push_back(cast<Instruction>(VL[i])->getOperand(0));
TrueVec.push_back(cast<Instruction>(VL[i])->getOperand(1));
FalseVec.push_back(cast<Instruction>(VL[i])->getOperand(2));
}
Value *True = vectorizeTree_rec(TrueVec, VF);
Value *False = vectorizeTree_rec(FalseVec, VF);
Value *Cond = vectorizeTree_rec(CondVec, VF);
Value *V = Builder.CreateSelect(Cond, True, False);
for (int i = 0; i < VF; ++i)
VectorizedValues[VL[i]] = V;
return V;
}
case Instruction::Add:
case Instruction::FAdd:
case Instruction::Sub:

32
test/Transforms/SLPVectorizer/X86/cmp_sel.ll Normal file
View File

@ -0,0 +1,32 @@
; RUN: opt < %s -basicaa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.8.0"
; int foo(double * restrict A, double * restrict B, double G) {
; A[0] = (B[10] ? G : 1);
; A[1] = (B[11] ? G : 1);
; }
;CHECK: @foo
;CHECK: load <2 x double>
;CHECK: fcmp une <2 x double>
;CHECK: select <2 x i1>
;CHECK: store <2 x double>
;CHECK: ret i32 undef
define i32 @foo(double* noalias nocapture %A, double* noalias nocapture %B, double %G) {
entry:
%arrayidx = getelementptr inbounds double* %B, i64 10
%0 = load double* %arrayidx, align 8
%tobool = fcmp une double %0, 0.000000e+00
%cond = select i1 %tobool, double %G, double 1.000000e+00
store double %cond, double* %A, align 8
%arrayidx2 = getelementptr inbounds double* %B, i64 11
%1 = load double* %arrayidx2, align 8
%tobool3 = fcmp une double %1, 0.000000e+00
%cond7 = select i1 %tobool3, double %G, double 1.000000e+00
%arrayidx8 = getelementptr inbounds double* %A, i64 1
store double %cond7, double* %arrayidx8, align 8
ret i32 undef
}