[llvm] 6d12b3f - [VP] Refactor VectorBuilder to avoid layering violation. NFC (#99276)
via llvm-commits
llvm-commits at lists.llvm.org
Thu Jul 25 00:14:42 PDT 2024
Author: Mel Chen
Date: 2024-07-25T15:14:39+08:00
New Revision: 6d12b3f67df429bffff6e1953d9f55867d7e2469
URL: https://github.com/llvm/llvm-project/commit/6d12b3f67df429bffff6e1953d9f55867d7e2469
DIFF: https://github.com/llvm/llvm-project/commit/6d12b3f67df429bffff6e1953d9f55867d7e2469.diff
LOG: [VP] Refactor VectorBuilder to avoid layering violation. NFC (#99276)
This patch refactors the handling of reduction to eliminate layering
violations.
* Introduced `getReductionIntrinsicID` in LoopUtils.h for mapping
recurrence kinds to llvm.vector.reduce.* intrinsic IDs.
* Updated `VectorBuilder::createSimpleTargetReduction` to accept
llvm.vector.reduce.* intrinsic directly.
* New function `VPIntrinsic::getForIntrinsic` for mapping intrinsic ID
to the same functional VP intrinsic ID.
Added:
Modified:
llvm/include/llvm/IR/IntrinsicInst.h
llvm/include/llvm/IR/VectorBuilder.h
llvm/include/llvm/Transforms/Utils/LoopUtils.h
llvm/lib/IR/IntrinsicInst.cpp
llvm/lib/IR/VectorBuilder.cpp
llvm/lib/Transforms/Utils/LoopUtils.cpp
llvm/unittests/IR/VPIntrinsicTest.cpp
Removed:
################################################################################
diff --git a/llvm/include/llvm/IR/IntrinsicInst.h b/llvm/include/llvm/IR/IntrinsicInst.h
index fe3f92da400f8..94c8fa092f45e 100644
--- a/llvm/include/llvm/IR/IntrinsicInst.h
+++ b/llvm/include/llvm/IR/IntrinsicInst.h
@@ -569,6 +569,10 @@ class VPIntrinsic : public IntrinsicInst {
/// The llvm.vp.* intrinsics for this instruction Opcode
static Intrinsic::ID getForOpcode(unsigned OC);
+ /// The llvm.vp.* intrinsics for this intrinsic ID \p Id. Return \p Id if it
+ /// is already a VP intrinsic.
+ static Intrinsic::ID getForIntrinsic(Intrinsic::ID Id);
+
// Whether \p ID is a VP intrinsic ID.
static bool isVPIntrinsic(Intrinsic::ID);
diff --git a/llvm/include/llvm/IR/VectorBuilder.h b/llvm/include/llvm/IR/VectorBuilder.h
index 6af7f6075551d..dbb9f4c7336d5 100644
--- a/llvm/include/llvm/IR/VectorBuilder.h
+++ b/llvm/include/llvm/IR/VectorBuilder.h
@@ -15,7 +15,6 @@
#ifndef LLVM_IR_VECTORBUILDER_H
#define LLVM_IR_VECTORBUILDER_H
-#include <llvm/Analysis/IVDescriptors.h>
#include <llvm/IR/IRBuilder.h>
#include <llvm/IR/InstrTypes.h>
#include <llvm/IR/Instruction.h>
@@ -100,11 +99,11 @@ class VectorBuilder {
const Twine &Name = Twine());
/// Emit a VP reduction intrinsic call for recurrence kind.
- /// \param Kind The kind of recurrence
+ /// \param RdxID The intrinsic ID of llvm.vector.reduce.*
/// \param ValTy The type of operand which the reduction operation is
/// performed.
/// \param VecOpArray The operand list.
- Value *createSimpleTargetReduction(RecurKind Kind, Type *ValTy,
+ Value *createSimpleTargetReduction(Intrinsic::ID RdxID, Type *ValTy,
ArrayRef<Value *> VecOpArray,
const Twine &Name = Twine());
};
diff --git a/llvm/include/llvm/Transforms/Utils/LoopUtils.h b/llvm/include/llvm/Transforms/Utils/LoopUtils.h
index b01a447f3c28b..56880bd4822c7 100644
--- a/llvm/include/llvm/Transforms/Utils/LoopUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/LoopUtils.h
@@ -359,6 +359,10 @@ bool canSinkOrHoistInst(Instruction &I, AAResults *AA, DominatorTree *DT,
SinkAndHoistLICMFlags &LICMFlags,
OptimizationRemarkEmitter *ORE = nullptr);
+/// Returns the llvm.vector.reduce intrinsic that corresponds to the recurrence
+/// kind.
+constexpr Intrinsic::ID getReductionIntrinsicID(RecurKind RK);
+
/// Returns the arithmetic instruction opcode used when expanding a reduction.
unsigned getArithmeticReductionInstruction(Intrinsic::ID RdxID);
diff --git a/llvm/lib/IR/IntrinsicInst.cpp b/llvm/lib/IR/IntrinsicInst.cpp
index 64a14da55b15e..db3b0196f66fd 100644
--- a/llvm/lib/IR/IntrinsicInst.cpp
+++ b/llvm/lib/IR/IntrinsicInst.cpp
@@ -599,6 +599,25 @@ Intrinsic::ID VPIntrinsic::getForOpcode(unsigned IROPC) {
return Intrinsic::not_intrinsic;
}
+constexpr static Intrinsic::ID getForIntrinsic(Intrinsic::ID Id) {
+ if (::isVPIntrinsic(Id))
+ return Id;
+
+ switch (Id) {
+ default:
+ break;
+#define BEGIN_REGISTER_VP_INTRINSIC(VPID, ...) break;
+#define VP_PROPERTY_FUNCTIONAL_INTRINSIC(INTRIN) case Intrinsic::INTRIN:
+#define END_REGISTER_VP_INTRINSIC(VPID) return Intrinsic::VPID;
+#include "llvm/IR/VPIntrinsics.def"
+ }
+ return Intrinsic::not_intrinsic;
+}
+
+Intrinsic::ID VPIntrinsic::getForIntrinsic(Intrinsic::ID Id) {
+ return ::getForIntrinsic(Id);
+}
+
bool VPIntrinsic::canIgnoreVectorLengthParam() const {
using namespace PatternMatch;
diff --git a/llvm/lib/IR/VectorBuilder.cpp b/llvm/lib/IR/VectorBuilder.cpp
index 5ff3082879895..8dbf25277bf5d 100644
--- a/llvm/lib/IR/VectorBuilder.cpp
+++ b/llvm/lib/IR/VectorBuilder.cpp
@@ -60,60 +60,13 @@ Value *VectorBuilder::createVectorInstruction(unsigned Opcode, Type *ReturnTy,
return createVectorInstructionImpl(VPID, ReturnTy, InstOpArray, Name);
}
-Value *VectorBuilder::createSimpleTargetReduction(RecurKind Kind, Type *ValTy,
+Value *VectorBuilder::createSimpleTargetReduction(Intrinsic::ID RdxID,
+ Type *ValTy,
ArrayRef<Value *> InstOpArray,
const Twine &Name) {
- Intrinsic::ID VPID;
- switch (Kind) {
- case RecurKind::Add:
- VPID = Intrinsic::vp_reduce_add;
- break;
- case RecurKind::Mul:
- VPID = Intrinsic::vp_reduce_mul;
- break;
- case RecurKind::And:
- VPID = Intrinsic::vp_reduce_and;
- break;
- case RecurKind::Or:
- VPID = Intrinsic::vp_reduce_or;
- break;
- case RecurKind::Xor:
- VPID = Intrinsic::vp_reduce_xor;
- break;
- case RecurKind::FMulAdd:
- case RecurKind::FAdd:
- VPID = Intrinsic::vp_reduce_fadd;
- break;
- case RecurKind::FMul:
- VPID = Intrinsic::vp_reduce_fmul;
- break;
- case RecurKind::SMax:
- VPID = Intrinsic::vp_reduce_smax;
- break;
- case RecurKind::SMin:
- VPID = Intrinsic::vp_reduce_smin;
- break;
- case RecurKind::UMax:
- VPID = Intrinsic::vp_reduce_umax;
- break;
- case RecurKind::UMin:
- VPID = Intrinsic::vp_reduce_umin;
- break;
- case RecurKind::FMax:
- VPID = Intrinsic::vp_reduce_fmax;
- break;
- case RecurKind::FMin:
- VPID = Intrinsic::vp_reduce_fmin;
- break;
- case RecurKind::FMaximum:
- VPID = Intrinsic::vp_reduce_fmaximum;
- break;
- case RecurKind::FMinimum:
- VPID = Intrinsic::vp_reduce_fminimum;
- break;
- default:
- llvm_unreachable("No VPIntrinsic for this reduction");
- }
+ auto VPID = VPIntrinsic::getForIntrinsic(RdxID);
+ assert(VPReductionIntrinsic::isVPReduction(VPID) &&
+ "No VPIntrinsic for this reduction");
return createVectorInstructionImpl(VPID, ValTy, InstOpArray, Name);
}
diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index 4609376a748f9..0abf6d77496dc 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -918,6 +918,44 @@ bool llvm::hasIterationCountInvariantInParent(Loop *InnerLoop,
return true;
}
+constexpr Intrinsic::ID llvm::getReductionIntrinsicID(RecurKind RK) {
+ switch (RK) {
+ default:
+ llvm_unreachable("Unexpected recurrence kind");
+ case RecurKind::Add:
+ return Intrinsic::vector_reduce_add;
+ case RecurKind::Mul:
+ return Intrinsic::vector_reduce_mul;
+ case RecurKind::And:
+ return Intrinsic::vector_reduce_and;
+ case RecurKind::Or:
+ return Intrinsic::vector_reduce_or;
+ case RecurKind::Xor:
+ return Intrinsic::vector_reduce_xor;
+ case RecurKind::FMulAdd:
+ case RecurKind::FAdd:
+ return Intrinsic::vector_reduce_fadd;
+ case RecurKind::FMul:
+ return Intrinsic::vector_reduce_fmul;
+ case RecurKind::SMax:
+ return Intrinsic::vector_reduce_smax;
+ case RecurKind::SMin:
+ return Intrinsic::vector_reduce_smin;
+ case RecurKind::UMax:
+ return Intrinsic::vector_reduce_umax;
+ case RecurKind::UMin:
+ return Intrinsic::vector_reduce_umin;
+ case RecurKind::FMax:
+ return Intrinsic::vector_reduce_fmax;
+ case RecurKind::FMin:
+ return Intrinsic::vector_reduce_fmin;
+ case RecurKind::FMaximum:
+ return Intrinsic::vector_reduce_fmaximum;
+ case RecurKind::FMinimum:
+ return Intrinsic::vector_reduce_fminimum;
+ }
+}
+
unsigned llvm::getArithmeticReductionInstruction(Intrinsic::ID RdxID) {
switch (RdxID) {
case Intrinsic::vector_reduce_fadd:
@@ -1215,12 +1253,13 @@ Value *llvm::createSimpleTargetReduction(VectorBuilder &VBuilder, Value *Src,
RecurKind Kind = Desc.getRecurrenceKind();
assert(!RecurrenceDescriptor::isAnyOfRecurrenceKind(Kind) &&
"AnyOf reduction is not supported.");
+ Intrinsic::ID Id = getReductionIntrinsicID(Kind);
auto *SrcTy = cast<VectorType>(Src->getType());
Type *SrcEltTy = SrcTy->getElementType();
Value *Iden =
Desc.getRecurrenceIdentity(Kind, SrcEltTy, Desc.getFastMathFlags());
Value *Ops[] = {Iden, Src};
- return VBuilder.createSimpleTargetReduction(Kind, SrcTy, Ops);
+ return VBuilder.createSimpleTargetReduction(Id, SrcTy, Ops);
}
Value *llvm::createTargetReduction(IRBuilderBase &B,
@@ -1260,9 +1299,10 @@ Value *llvm::createOrderedReduction(VectorBuilder &VBuilder,
assert(Src->getType()->isVectorTy() && "Expected a vector type");
assert(!Start->getType()->isVectorTy() && "Expected a scalar type");
+ Intrinsic::ID Id = getReductionIntrinsicID(RecurKind::FAdd);
auto *SrcTy = cast<VectorType>(Src->getType());
Value *Ops[] = {Start, Src};
- return VBuilder.createSimpleTargetReduction(RecurKind::FAdd, SrcTy, Ops);
+ return VBuilder.createSimpleTargetReduction(Id, SrcTy, Ops);
}
void llvm::propagateIRFlags(Value *I, ArrayRef<Value *> VL, Value *OpValue,
diff --git a/llvm/unittests/IR/VPIntrinsicTest.cpp b/llvm/unittests/IR/VPIntrinsicTest.cpp
index eab2850ca4e1e..cf0a10d1f2e95 100644
--- a/llvm/unittests/IR/VPIntrinsicTest.cpp
+++ b/llvm/unittests/IR/VPIntrinsicTest.cpp
@@ -367,6 +367,59 @@ TEST_F(VPIntrinsicTest, IntrinsicIDRoundTrip) {
ASSERT_NE(FullTripCounts, 0u);
}
+/// Check that going from intrinsic to VP intrinsic and back results in the same
+/// intrinsic.
+TEST_F(VPIntrinsicTest, IntrinsicToVPRoundTrip) {
+ bool IsFullTrip = false;
+ Intrinsic::ID IntrinsicID = Intrinsic::not_intrinsic + 1;
+ for (; IntrinsicID < Intrinsic::num_intrinsics; IntrinsicID++) {
+ Intrinsic::ID VPID = VPIntrinsic::getForIntrinsic(IntrinsicID);
+ // No equivalent VP intrinsic available.
+ if (VPID == Intrinsic::not_intrinsic)
+ continue;
+
+ // Return itself if passed intrinsic ID is VP intrinsic.
+ if (VPIntrinsic::isVPIntrinsic(IntrinsicID)) {
+ ASSERT_EQ(IntrinsicID, VPID);
+ continue;
+ }
+
+ std::optional<Intrinsic::ID> RoundTripIntrinsicID =
+ VPIntrinsic::getFunctionalIntrinsicIDForVP(VPID);
+ // No equivalent non-predicated intrinsic available.
+ if (!RoundTripIntrinsicID)
+ continue;
+
+ ASSERT_EQ(*RoundTripIntrinsicID, IntrinsicID);
+ IsFullTrip = true;
+ }
+ ASSERT_TRUE(IsFullTrip);
+}
+
+/// Check that going from VP intrinsic to equivalent non-predicated intrinsic
+/// and back results in the same intrinsic.
+TEST_F(VPIntrinsicTest, VPToNonPredIntrinsicRoundTrip) {
+ std::unique_ptr<Module> M = createVPDeclarationModule();
+ assert(M);
+
+ bool IsFullTrip = false;
+ for (const auto &VPDecl : *M) {
+ auto VPID = VPDecl.getIntrinsicID();
+ std::optional<Intrinsic::ID> NonPredID =
+ VPIntrinsic::getFunctionalIntrinsicIDForVP(VPID);
+
+ // No equivalent non-predicated intrinsic available
+ if (!NonPredID)
+ continue;
+
+ Intrinsic::ID RoundTripVPID = VPIntrinsic::getForIntrinsic(*NonPredID);
+
+ ASSERT_EQ(RoundTripVPID, VPID);
+ IsFullTrip = true;
+ }
+ ASSERT_TRUE(IsFullTrip);
+}
+
/// Check that VPIntrinsic::getDeclarationForParams works.
TEST_F(VPIntrinsicTest, VPIntrinsicDeclarationForParams) {
std::unique_ptr<Module> M = createVPDeclarationModule();
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