Revert "[SandboxVec][Legality] Reject non-instructions (llvm#113190)"

This reverts commit 6c9bbbc.

Author: Vasileios Porpodas

llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Legality.h

@@ -28,7 +28,6 @@ enum class LegalityResultID {
 
 /// The reason for vectorizing or not vectorizing.
 enum class ResultReason {
-  NotInstructions,
   DiffOpcodes,
   DiffTypes,
 };
@@ -47,8 +46,6 @@ struct ToStr {
 
   static const char *getVecReason(ResultReason Reason) {
     switch (Reason) {
-    case ResultReason::NotInstructions:
-      return "NotInstructions";
     case ResultReason::DiffOpcodes:
       return "DiffOpcodes";
     case ResultReason::DiffTypes:
@@ -70,10 +67,6 @@ class LegalityResult {
   LegalityResult(LegalityResultID ID) : ID(ID) {}
   friend class LegalityAnalysis;
 
-  /// We shouldn't need copies.
-  LegalityResult(const LegalityResult &) = delete;
-  LegalityResult &operator=(const LegalityResult &) = delete;
-
 public:
   virtual ~LegalityResult() {}
   LegalityResultID getSubclassID() const { return ID; }
@@ -97,7 +90,6 @@ class LegalityResultWithReason : public LegalityResult {
   friend class Pack; // For constructor.
 
 public:
-  ResultReason getReason() const { return Reason; }
 #ifndef NDEBUG
   void print(raw_ostream &OS) const override {
     LegalityResult::print(OS);
@@ -146,7 +138,7 @@ class LegalityAnalysis {
   }
   /// Checks if it's legal to vectorize the instructions in \p Bndl.
   /// \Returns a LegalityResult object owned by LegalityAnalysis.
-  const LegalityResult &canVectorize(ArrayRef<Value *> Bndl);
+  LegalityResult &canVectorize(ArrayRef<Value *> Bndl);
 };
 
 } // namespace llvm::sandboxir

llvm/lib/Transforms/Vectorize/SandboxVectorizer/Legality.cpp

@@ -7,15 +7,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/Legality.h"
-#include "llvm/SandboxIR/Instruction.h"
-#include "llvm/SandboxIR/Utils.h"
 #include "llvm/SandboxIR/Value.h"
 #include "llvm/Support/Debug.h"
 
 namespace llvm::sandboxir {
 
-#define DEBUG_TYPE "SBVec:Legality"
-
 #ifndef NDEBUG
 void LegalityResult::dump() const {
   print(dbgs());
@@ -30,19 +26,7 @@ LegalityAnalysis::notVectorizableBasedOnOpcodesAndTypes(
   return std::nullopt;
 }
 
-static void dumpBndl(ArrayRef<Value *> Bndl) {
-  for (auto *V : Bndl)
-    dbgs() << *V << "\n";
-}
-
-const LegalityResult &LegalityAnalysis::canVectorize(ArrayRef<Value *> Bndl) {
-  // If Bndl contains values other than instructions, we need to Pack.
-  if (any_of(Bndl, [](auto *V) { return !isa<Instruction>(V); })) {
-    LLVM_DEBUG(dbgs() << "Not vectorizing: Not Instructions:\n";
-               dumpBndl(Bndl););
-    return createLegalityResult<Pack>(ResultReason::NotInstructions);
-  }
-
+LegalityResult &LegalityAnalysis::canVectorize(ArrayRef<Value *> Bndl) {
   if (auto ReasonOpt = notVectorizableBasedOnOpcodesAndTypes(Bndl))
     return createLegalityResult<Pack>(*ReasonOpt);
 

llvm/lib/Transforms/Vectorize/SandboxVectorizer/Passes/BottomUpVec.cpp

@@ -40,7 +40,7 @@ static SmallVector<Value *, 4> getOperand(ArrayRef<Value *> Bndl,
 }
 
 void BottomUpVec::vectorizeRec(ArrayRef<Value *> Bndl) {
-  const auto &LegalityRes = Legality.canVectorize(Bndl);
+  auto LegalityRes = Legality.canVectorize(Bndl);
   switch (LegalityRes.getSubclassID()) {
   case LegalityResultID::Widen: {
     auto *I = cast<Instruction>(Bndl[0]);

llvm/unittests/Transforms/Vectorize/SandboxVectorizer/LegalityTest.cpp

@@ -52,16 +52,8 @@ define void @foo(ptr %ptr) {
   auto *St1 = cast<sandboxir::StoreInst>(&*It++);
 
   sandboxir::LegalityAnalysis Legality;
-  const auto &Result = Legality.canVectorize({St0, St1});
+  auto Result = Legality.canVectorize({St0, St1});
   EXPECT_TRUE(isa<sandboxir::Widen>(Result));
-
-  {
-    // Check NotInstructions
-    auto &Result = Legality.canVectorize({F, St0});
-    EXPECT_TRUE(isa<sandboxir::Pack>(Result));
-    EXPECT_EQ(cast<sandboxir::Pack>(Result).getReason(),
-              sandboxir::ResultReason::NotInstructions);
-  }
 }
 
 #ifndef NDEBUG
@@ -76,9 +68,6 @@ TEST_F(LegalityTest, LegalityResultDump) {
   sandboxir::LegalityAnalysis Legality;
   EXPECT_TRUE(
       Matches(Legality.createLegalityResult<sandboxir::Widen>(), "Widen"));
-  EXPECT_TRUE(Matches(Legality.createLegalityResult<sandboxir::Pack>(
-                          sandboxir::ResultReason::NotInstructions),
-                      "Pack Reason: NotInstructions"));
   EXPECT_TRUE(Matches(Legality.createLegalityResult<sandboxir::Pack>(
                           sandboxir::ResultReason::DiffOpcodes),
                       "Pack Reason: DiffOpcodes"));