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[Matrix] Mark expressions shared between multiple remarks.
This patch adds support for explicitly highlighting sub-expressions shared by multiple leaf nodes. For example consider the following code %shared.load = tail call <8 x double> @llvm.matrix.columnwise.load.v8f64.p0f64(double* %arg1, i32 %stride, i32 2, i32 4), !dbg !10, !noalias !10 %trans = tail call <8 x double> @llvm.matrix.transpose.v8f64(<8 x double> %shared.load, i32 2, i32 4), !dbg !10 tail call void @llvm.matrix.columnwise.store.v8f64.p0f64(<8 x double> %trans, double* %arg3, i32 10, i32 4, i32 2), !dbg !10 %load.2 = tail call <30 x double> @llvm.matrix.columnwise.load.v30f64.p0f64(double* %arg3, i32 %stride, i32 2, i32 15), !dbg !10, !noalias !10 %mult = tail call <60 x double> @llvm.matrix.multiply.v60f64.v8f64.v30f64(<8 x double> %trans, <30 x double> %load.2, i32 4, i32 2, i32 15), !dbg !11 tail call void @llvm.matrix.columnwise.store.v60f64.p0f64(<60 x double> %mult, double* %arg2, i32 10, i32 4, i32 15), !dbg !11 We have two leaf nodes (the 2 stores) and the first store stores %trans which is also used by the matrix multiply %mult. We generate separate remarks for each leaf (stores). To denote that parts are shared, the shared expressions are marked as shared (), with a reference to the other remark that shares it. The operation summary also denotes the shared operations separately. Reviewers: anemet, Gerolf, thegameg, hfinkel, andrew.w.kaylor, LuoYuanke Reviewed By: anemet Differential Revision: https://reviews.llvm.org/D72526
This commit is contained in:
Florian Hahn
parent
a7b7627d67
commit
421b40f37f
@ -946,13 +946,23 @@ public:
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/// matrix instructions.
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const MapVector<Value *, ColumnMatrixTy> &Inst2ColumnMatrix;
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/// Mapping from values to the leaves of all expressions that the value is
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/// part of.
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const DenseMap<Value *, SmallPtrSet<Value *, 2>> &Shared;
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/// Leaf node of the expression to linearize.
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Value *Leaf;
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/// Used to keep track of sub-expressions that get reused while linearizing
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/// the expression. Re-used sub-expressions are marked as (reused).
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SmallPtrSet<Value *, 8> ReusedExprs;
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ExprLinearizer(const DataLayout &DL,
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const MapVector<Value *, ColumnMatrixTy> &Inst2ColumnMatrix)
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: Str(), Stream(Str), DL(DL), Inst2ColumnMatrix(Inst2ColumnMatrix) {}
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const MapVector<Value *, ColumnMatrixTy> &Inst2ColumnMatrix,
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const DenseMap<Value *, SmallPtrSet<Value *, 2>> &Shared,
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Value *Leaf)
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: Str(), Stream(Str), DL(DL), Inst2ColumnMatrix(Inst2ColumnMatrix),
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Shared(Shared), Leaf(Leaf) {}
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void indent(unsigned N) {
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LineLength += N;
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@ -1108,11 +1118,30 @@ public:
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/// Linearize expression \p Expr starting at an indentation of \p Indent.
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/// Expressions that are re-used multiple times are prefixed with (reused)
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/// at the re-used root instruction.
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void linearizeExpr(Value *Expr, unsigned Indent, bool ParentReused) {
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void linearizeExpr(Value *Expr, unsigned Indent, bool ParentReused,
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bool ParentShared) {
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auto *I = cast<Instruction>(Expr);
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maybeIndent(Indent);
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SmallVector<Value *, 8> Ops;
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// Is Expr shared with other expression leaves?
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bool ExprShared = false;
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// Deal with shared subtrees. Mark them as shared, if required.
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if (!ParentShared) {
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auto SI = Shared.find(Expr);
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assert(SI != Shared.end() && SI->second.find(Leaf) != SI->second.end());
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for (Value *S : SI->second) {
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if (S == Leaf)
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continue;
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DebugLoc DL = cast<Instruction>(S)->getDebugLoc();
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write("shared with remark at line " + std::to_string(DL.getLine()) +
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" column " + std::to_string(DL.getCol()) + " (");
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}
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ExprShared = SI->second.size() > 1;
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}
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bool Reused = !ReusedExprs.insert(Expr).second;
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if (Reused && !ParentReused)
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write("(reused) ");
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@ -1144,7 +1173,7 @@ public:
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maybeIndent(Indent + 1);
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if (isMatrix(Op))
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linearizeExpr(Op, Indent + 1, Reused);
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linearizeExpr(Op, Indent + 1, Reused, ExprShared);
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else
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write(Op);
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if (Op != Ops.back())
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@ -1171,7 +1200,6 @@ public:
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///
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/// TODO:
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/// * Summarize number of vector instructions generated for each expression.
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/// * Account for shared sub-expressions.
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/// * Propagate matrix remarks up the inlining chain.
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struct RemarkGenerator {
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const MapVector<Value *, ColumnMatrixTy> &Inst2ColumnMatrix;
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@ -1194,9 +1222,27 @@ public:
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return Leaves;
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}
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/// Recursively traverse expression \p V starting at \p Leaf and add \p Leaf
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/// to all visited expressions in \p Shared.
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void collectSharedInfo(Value *Leaf, Value *V,
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DenseMap<Value *, SmallPtrSet<Value *, 2>> &Shared) {
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if (Inst2ColumnMatrix.find(V) == Inst2ColumnMatrix.end())
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return;
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auto I = Shared.insert({V, {}});
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I.first->second.insert(Leaf);
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for (Value *Op : cast<Instruction>(V)->operand_values())
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collectSharedInfo(Leaf, Op, Shared);
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return;
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}
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/// Calculate the number of exclusive and shared op counts for expression
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/// starting at \p V. Expressions used multiple times are counted once.
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OpInfoTy sumOpInfos(Value *Root, SmallPtrSetImpl<Value *> &ReusedExprs) {
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std::pair<OpInfoTy, OpInfoTy>
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sumOpInfos(Value *Root, SmallPtrSetImpl<Value *> &ReusedExprs,
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DenseMap<Value *, SmallPtrSet<Value *, 2>> &Shared) {
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auto CM = Inst2ColumnMatrix.find(Root);
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if (CM == Inst2ColumnMatrix.end())
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return {};
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@ -1205,10 +1251,21 @@ public:
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if (!ReusedExprs.insert(Root).second)
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return {};
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OpInfoTy Count = CM->second.getOpInfo();
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for (Value *Op : cast<Instruction>(Root)->operand_values())
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Count += sumOpInfos(Op, ReusedExprs);
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return Count;
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OpInfoTy SharedCount;
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OpInfoTy Count;
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auto I = Shared.find(Root);
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if (I->second.size() == 1)
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Count = CM->second.getOpInfo();
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else
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SharedCount = CM->second.getOpInfo();
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for (Value *Op : cast<Instruction>(Root)->operand_values()) {
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auto C = sumOpInfos(Op, ReusedExprs, Shared);
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Count += C.first;
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SharedCount += C.second;
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}
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return {Count, SharedCount};
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}
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void emitRemarks() {
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@ -1218,26 +1275,47 @@ public:
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// Find leafs of matrix expressions.
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auto Leaves = getExpressionLeaves();
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DenseMap<Value *, SmallPtrSet<Value *, 2>> Shared;
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for (Value *Leaf : Leaves)
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collectSharedInfo(Leaf, Leaf, Shared);
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// Generate remarks for each leaf.
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for (auto *L : Leaves) {
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SmallPtrSet<Value *, 8> ReusedExprs;
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auto Counts = sumOpInfos(L, ReusedExprs);
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OpInfoTy Counts, SharedCounts;
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std::tie(Counts, SharedCounts) = sumOpInfos(L, ReusedExprs, Shared);
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OptimizationRemark Rem(DEBUG_TYPE, "matrix-lowered",
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cast<Instruction>(L)->getDebugLoc(),
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cast<Instruction>(L)->getParent());
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Rem << "Lowered with ";
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Rem << ore::NV("NumStores", Counts.NumStores) << " stores, "
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<< ore::NV("NumLoads", Counts.NumLoads) << " loads, "
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<< ore::NV("NumComputeOps", Counts.NumComputeOps) << " compute ops";
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Rem << ("\n" + linearize(L, DL));
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if (SharedCounts.NumStores > 0 || SharedCounts.NumLoads > 0 ||
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SharedCounts.NumComputeOps > 0) {
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Rem << ",\nadditionally "
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<< ore::NV("NumStores", SharedCounts.NumStores) << " stores, "
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<< ore::NV("NumLoads", SharedCounts.NumLoads) << " loads, "
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<< ore::NV("NumFPOps", SharedCounts.NumComputeOps)
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<< " compute ops"
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<< " are shared with other expressions";
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}
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Rem << ("\n" + linearize(L, Shared, DL));
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ORE.emit(Rem);
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}
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}
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std::string linearize(Value *L, const DataLayout &DL) {
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ExprLinearizer Lin(DL, Inst2ColumnMatrix);
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Lin.linearizeExpr(L, 0, false);
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std::string
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linearize(Value *L,
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const DenseMap<Value *, SmallPtrSet<Value *, 2>> &Shared,
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const DataLayout &DL) {
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ExprLinearizer Lin(DL, Inst2ColumnMatrix, Shared, L);
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Lin.linearizeExpr(L, 0, false, false);
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return Lin.getResult();
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}
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};
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162
test/Transforms/LowerMatrixIntrinsics/remarks-shared-subtrees.ll
Normal file
162
test/Transforms/LowerMatrixIntrinsics/remarks-shared-subtrees.ll
Normal file
@ -0,0 +1,162 @@
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; REQUIRES: aarch64-registered-target
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; This test needs to be target specific due to the cost estimate in the output.
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; RUN: opt -lower-matrix-intrinsics -pass-remarks-output=%t -pass-remarks=lower-matrix-intrinsics -mtriple=arm64-apple-iphoneos %s 2>&1 -disable-output | FileCheck --check-prefix=STDERR %s
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; RUN: FileCheck --input-file=%t --check-prefix=YAML %s
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; YAML-LABEL: --- !Passed
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; YAML-NEXT: Pass: lower-matrix-intrinsics
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; YAML-NEXT: Name: matrix-lowered
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; YAML-NEXT: DebugLoc: { File: test.cpp, Line: 35, Column: 71 }
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; YAML-NEXT: Function: test_2leafs
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'Lowered with '
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; YAML-NEXT: - NumStores: '4'
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; YAML-NEXT: - String: ' stores, '
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; YAML-NEXT: - NumLoads: '0'
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; YAML-NEXT: - String: ' loads, '
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; YAML-NEXT: - NumComputeOps: '0'
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; YAML-NEXT: - String: ' compute ops'
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; YAML-NEXT: - String: ',
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; YAML-NEXT: additionally '
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; YAML-NEXT: - NumStores: '0'
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; YAML-NEXT: - String: ' stores, '
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; YAML-NEXT: - NumLoads: '4'
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; YAML-NEXT: - String: ' loads, '
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; YAML-NEXT: - NumFPOps: '16'
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; YAML-NEXT: - String: ' compute ops'
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; YAML-NEXT: - String: ' are shared with other expressions'
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; YAML-NEXT: - String: |
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; YAML: columnwise.store.4x2.double(
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; YAML-NEXT: shared with remark at line 35 column 45 (transpose.2x4.double(columnwise.load.2x4.double(addr %arg1,
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; YAML-NEXT: scalar)),
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; YAML-NEXT: addr %arg3,
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; YAML-NEXT: 10)
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; YAML-LABEL: --- !Passed
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; YAML-NEXT: Pass: lower-matrix-intrinsics
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; YAML-NEXT: Name: matrix-lowered
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; YAML-NEXT: DebugLoc: { File: test.cpp, Line: 35, Column: 45 }
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; YAML-NEXT: Function: test_2leafs
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'Lowered with '
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; YAML-NEXT: - NumStores: '30'
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; YAML-NEXT: - String: ' stores, '
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; YAML-NEXT: - NumLoads: '45'
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; YAML-NEXT: - String: ' loads, '
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; YAML-NEXT: - NumComputeOps: '120'
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; YAML-NEXT: - String: ' compute ops'
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; YAML-NEXT: - String: ',
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; YAML-NEXT: additionally '
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; YAML-NEXT: - NumStores: '0'
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; YAML-NEXT: - String: ' stores, '
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; YAML-NEXT: - NumLoads: '4'
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; YAML-NEXT: - String: ' loads, '
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; YAML-NEXT: - NumFPOps: '16'
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; YAML-NEXT: - String: ' compute ops'
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; YAML-NEXT: - String: ' are shared with other expressions'
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; YAML-NEXT: - String: |
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; YAML: columnwise.store.4x15.double(
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; YAML-NEXT: fsub(
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; YAML-NEXT: columnwise.load.4x15.double(addr %arg2, 20),
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; YAML-NEXT: multiply.4x2.2x15.double(
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; YAML-NEXT: shared with remark at line 35 column 71 (transpose.2x4.double(columnwise.load.2x4.double(addr %arg1,
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; YAML-NEXT: scalar)),
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; YAML-NEXT: columnwise.load.2x15.double(addr %arg3, scalar))),
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; YAML-NEXT: addr %arg2,
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; YAML-NEXT: 10)
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; STDERR-LABEL: remark: test.cpp:35:71: Lowered with 4 stores, 0 loads, 0 compute ops,
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; STDERR-NEXT: additionally 0 stores, 4 loads, 16 compute ops are shared with other expressions
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; STDERR-NEXT: columnwise.store.4x2.double(
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; STDERR-NEXT: shared with remark at line 35 column 45 (transpose.2x4.double(columnwise.load.2x4.double(addr %arg1,
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; STDERR-NEXT: scalar)),
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; STDERR-NEXT: addr %arg3,
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; STDERR-NEXT: 10)
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; STDERR-LABEL: remark: test.cpp:35:45: Lowered with 30 stores, 45 loads, 120 compute ops,
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; STDERR-NEXT: additionally 0 stores, 4 loads, 16 compute ops are shared with other expressions
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; STDERR-NEXT: columnwise.store.4x15.double(
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; STDERR-NEXT: fsub(
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; STDERR-NEXT: columnwise.load.4x15.double(addr %arg2, 20),
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; STDERR-NEXT: multiply.4x2.2x15.double(
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; STDERR-NEXT: shared with remark at line 35 column 71 (transpose.2x4.double(columnwise.load.2x4.double(addr %arg1,
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; STDERR-NEXT: scalar)),
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; STDERR-NEXT: columnwise.load.2x15.double(addr %arg3, scalar))),
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; STDERR-NEXT: addr %arg2,
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; STDERR-NEXT: 10)
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define void @test_2leafs(double* %arg1, double* %arg2, double* %arg3, i32 %stride, i32 %offset) !dbg !8 {
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bb:
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%shared.load = tail call <8 x double> @llvm.matrix.columnwise.load.v8f64.p0f64(double* %arg1, i32 %stride, i32 2, i32 4), !dbg !10, !noalias !10
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%shared.load.2 = tail call <30 x double> @llvm.matrix.columnwise.load.v30f64.p0f64(double* %arg3, i32 %stride, i32 2, i32 15), !dbg !10, !noalias !10
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%tmp17 = tail call <8 x double> @llvm.matrix.transpose.v8f64(<8 x double> %shared.load, i32 2, i32 4), !dbg !10
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tail call void @llvm.matrix.columnwise.store.v8f64.p0f64(<8 x double> %tmp17, double* %arg3, i32 10, i32 4, i32 2), !dbg !10
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%tmp18 = tail call <60 x double> @llvm.matrix.columnwise.load.v60f64.p0f64(double* %arg2, i32 20, i32 4, i32 15), !dbg !11
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%tmp48 = tail call <60 x double> @llvm.matrix.multiply.v60f64.v8f64.v30f64(<8 x double> %tmp17, <30 x double> %shared.load.2, i32 4, i32 2, i32 15), !dbg !11
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%tmp49 = fsub <60 x double> %tmp18, %tmp48, !dbg !11
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tail call void @llvm.matrix.columnwise.store.v60f64.p0f64(<60 x double> %tmp49, double* %arg2, i32 10, i32 4, i32 15), !dbg !11
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ret void
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}
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declare <8 x double> @llvm.matrix.transpose.v8f64(<8 x double>, i32 immarg, i32 immarg)
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declare <8 x double> @llvm.matrix.columnwise.load.v8f64.p0f64(double*, i32, i32 immarg, i32 immarg)
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declare <30 x double> @llvm.matrix.columnwise.load.v30f64.p0f64(double*, i32, i32 immarg, i32 immarg)
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declare <60 x double> @llvm.matrix.columnwise.load.v60f64.p0f64(double*, i32, i32 immarg, i32 immarg)
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declare void @llvm.matrix.columnwise.store.v60f64.p0f64(<60 x double>, double* writeonly, i32, i32 immarg, i32 immarg)
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declare void @llvm.matrix.columnwise.store.v8f64.p0f64(<8 x double>, double* writeonly, i32, i32 immarg, i32 immarg)
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declare <60 x double> @llvm.matrix.multiply.v60f64.v8f64.v30f64(<8 x double>, <30 x double>, i32 immarg, i32 immarg, i32 immarg)
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!llvm.module.flags = !{!0, !1, !2, !3}
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!llvm.dbg.cu = !{!4}
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!llvm.ident = !{!7}
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!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 13, i32 0]}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = !{i32 1, !"wchar_size", i32 4}
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!3 = !{i32 7, !"PIC Level", i32 2}
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!4 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !5, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !6, nameTableKind: GNU)
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!5 = !DIFile(filename: "test.cpp", directory: "")
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!6 = !{}
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!7 = !{!"clang"}
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!8 = distinct !DISubprogram(name: "test", scope: !5, file: !5, line: 26, type: !9, scopeLine: 27, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
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!9 = !DISubroutineType(types: !6)
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!10 = distinct !DILocation(line: 35, column: 71, scope: !8)
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!11 = distinct !DILocation(line: 35, column: 45, scope: !8)
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!12 = !DILocation(line: 800, column: 17, scope: !13, inlinedAt: !15)
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!13 = distinct !DISubprogram(name: "foo", scope: !14, file: !14, line: 789, type: !9, scopeLine: 790, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
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!14 = !DIFile(filename: "bar.h", directory: "bar")
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!15 = distinct !DILocation(line: 1280, column: 5, scope: !16, inlinedAt: !18)
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!16 = distinct !DISubprogram(name: "zar", scope: !17, file: !17, line: 1275, type: !9, scopeLine: 1278, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
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!17 = !DIFile(filename: "file1.h", directory: "dir1")
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!18 = distinct !DILocation(line: 1278, column: 1, scope: !19, inlinedAt: !20)
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!19 = distinct !DISubprogram(name: "yo", scope: !17, file: !17, line: 1275, type: !9, scopeLine: 1278, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
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!20 = distinct !DILocation(line: 2514, column: 26, scope: !21, inlinedAt: !22)
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!21 = distinct !DISubprogram(name: "zzzz", scope: !14, file: !14, line: 2505, type: !9, scopeLine: 2506, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
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!22 = distinct !DILocation(line: 1263, column: 5, scope: !23, inlinedAt: !24)
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!23 = distinct !DISubprogram(name: "ppppp", scope: !17, file: !17, line: 1258, type: !9, scopeLine: 1261, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!24 = distinct !DILocation(line: 1261, column: 1, scope: !25, inlinedAt: !26)
|
||||
!25 = distinct !DISubprogram(name: "qqqq", scope: !17, file: !17, line: 1258, type: !9, scopeLine: 1261, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!26 = distinct !DILocation(line: 168, column: 7, scope: !27, inlinedAt: !29)
|
||||
!27 = distinct !DISubprogram(name: "lll", scope: !28, file: !28, line: 166, type: !9, scopeLine: 169, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!28 = !DIFile(filename: "file2.h", directory: "dir2")
|
||||
!29 = distinct !DILocation(line: 169, column: 1, scope: !30, inlinedAt: !31)
|
||||
!30 = distinct !DISubprogram(name: "Expr1", scope: !28, file: !28, line: 166, type: !9, scopeLine: 169, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!31 = distinct !DILocation(line: 368, column: 12, scope: !32, inlinedAt: !33)
|
||||
!32 = distinct !DISubprogram(name: "yyyyy", scope: !14, file: !14, line: 364, type: !9, scopeLine: 365, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!33 = distinct !DILocation(line: 1297, column: 34, scope: !34, inlinedAt: !35)
|
||||
!34 = distinct !DISubprogram(name: "eeeee", scope: !14, file: !14, line: 1290, type: !9, scopeLine: 1291, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!35 = distinct !DILocation(line: 2306, column: 5, scope: !36, inlinedAt: !11)
|
||||
!36 = distinct !DISubprogram(name: "aaaaa", scope: !37, file: !37, line: 2304, type: !9, scopeLine: 2305, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!37 = !DIFile(filename: "foo.c", directory: "/")
|
||||
!38 = distinct !DISubprogram(name: "test2", scope: !5, file: !5, line: 90, type: !9, scopeLine: 27, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!39 = distinct !DILocation(line: 44, column: 44, scope: !38)
|
||||
!40 = distinct !DILocation(line: 55, column: 55, scope: !38)
|
||||
!41 = distinct !DILocation(line: 66, column: 66, scope: !38)
|
||||
!42 = distinct !DISubprogram(name: "test2", scope: !5, file: !5, line: 90, type: !9, scopeLine: 27, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!43 = distinct !DILocation(line: 77, column: 77, scope: !42)
|
||||
!44 = distinct !DILocation(line: 88, column: 88, scope: !42)
|
||||
!45 = distinct !DISubprogram(name: "test2", scope: !5, file: !5, line: 90, type: !9, scopeLine: 27, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !4, retainedNodes: !6)
|
||||
!46 = distinct !DILocation(line: 99, column: 99, scope: !45)
|
||||
!47 = distinct !DILocation(line: 111, column: 111, scope: !45)
|
||||
@ -1,5 +1,7 @@
|
||||
; REQUIRES: aarch64-registered-target
|
||||
|
||||
; This test needs to be target specific due to the cost estimate in the output.
|
||||
|
||||
; RUN: opt -lower-matrix-intrinsics -pass-remarks=lower-matrix-intrinsics -mtriple=arm64-apple-iphoneos < %s 2>&1 | FileCheck %s
|
||||
|
||||
; CHECK-LABEL: remark: test.h:40:20: Lowered with 6 stores, 6 loads, 24 compute ops
|
||||
|
||||
Loading…
Reference in New Issue
Block a user