[llvm] [NFC][SPIR-V] Use PatternMatch combinators in SPIRVEmitIntrinsics (PR #189554)

[Arseniy Obolenskiy via llvm-commits]

https://github.com/aobolensk created https://github.com/llvm/llvm-project/pull/189554

Replace `dyn_cast<IntrinsicInst> + getIntrinsicID()` chains with PatternMatch combinators where applicable

>From 4db17a57ebf4d795ec7ecd73e5328f86e2402d0d Mon Sep 17 00:00:00 2001
From: Arseniy Obolenskiy <arseniy.obolenskiy at amd.com>
Date: Tue, 31 Mar 2026 09:46:01 +0200
Subject: [PATCH] [NFC][SPIR-V] Use PatternMatch combinators in
 SPIRVEmitIntrinsics

---
 llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp | 97 ++++++-------------
 1 file changed, 30 insertions(+), 67 deletions(-)

diff --git a/llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp b/llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp
index 9c2af100ad64eb..b487d359253f68 100644
--- a/llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVEmitIntrinsics.cpp
@@ -53,6 +53,7 @@
 // TODO: consider removing spv.track.constant in favor of spv.assign.type.
 
 using namespace llvm;
+using namespace llvm::PatternMatch;
 
 static cl::opt<bool>
     SpirvEmitOpNames("spirv-emit-op-names",
@@ -375,37 +376,28 @@ class SPIRVEmitIntrinsics
 };
 
 bool isConvergenceIntrinsic(const Instruction *I) {
-  const auto *II = dyn_cast<IntrinsicInst>(I);
-  if (!II)
-    return false;
-
-  return II->getIntrinsicID() == Intrinsic::experimental_convergence_entry ||
-         II->getIntrinsicID() == Intrinsic::experimental_convergence_loop ||
-         II->getIntrinsicID() == Intrinsic::experimental_convergence_anchor;
+  return match(
+      I, m_CombineOr(
+             m_Intrinsic<Intrinsic::experimental_convergence_entry>(),
+             m_CombineOr(
+                 m_Intrinsic<Intrinsic::experimental_convergence_loop>(),
+                 m_Intrinsic<Intrinsic::experimental_convergence_anchor>())));
 }
 
 bool expectIgnoredInIRTranslation(const Instruction *I) {
-  const auto *II = dyn_cast<IntrinsicInst>(I);
-  if (!II)
-    return false;
-  switch (II->getIntrinsicID()) {
-  case Intrinsic::invariant_start:
-  case Intrinsic::spv_resource_handlefrombinding:
-  case Intrinsic::spv_resource_getpointer:
-    return true;
-  default:
-    return false;
-  }
+  return match(
+      I,
+      m_CombineOr(
+          m_Intrinsic<Intrinsic::invariant_start>(),
+          m_CombineOr(m_Intrinsic<Intrinsic::spv_resource_handlefrombinding>(),
+                      m_Intrinsic<Intrinsic::spv_resource_getpointer>())));
 }
 
 // Returns the source pointer from `I` ignoring intermediate ptrcast.
 Value *getPointerRoot(Value *I) {
-  if (auto *II = dyn_cast<IntrinsicInst>(I)) {
-    if (II->getIntrinsicID() == Intrinsic::spv_ptrcast) {
-      Value *V = II->getArgOperand(0);
-      return getPointerRoot(V);
-    }
-  }
+  Value *V;
+  if (match(I, m_Intrinsic<Intrinsic::spv_ptrcast>(m_Value(V))))
+    return getPointerRoot(V);
   return I;
 }
 
@@ -417,8 +409,7 @@ INITIALIZE_PASS(SPIRVEmitIntrinsics, "spirv-emit-intrinsics",
                 "SPIRV emit intrinsics", false, false)
 
 static inline bool isAssignTypeInstr(const Instruction *I) {
-  return isa<IntrinsicInst>(I) &&
-         cast<IntrinsicInst>(I)->getIntrinsicID() == Intrinsic::spv_assign_type;
+  return match(I, m_Intrinsic<Intrinsic::spv_assign_type>());
 }
 
 static bool isMemInstrToReplace(Instruction *I) {
@@ -450,14 +441,8 @@ static void setInsertPointAfterDef(IRBuilder<> &B, Instruction *I) {
 }
 
 static bool requireAssignType(Instruction *I) {
-  if (const auto *Intr = dyn_cast<IntrinsicInst>(I)) {
-    switch (Intr->getIntrinsicID()) {
-    case Intrinsic::invariant_start:
-    case Intrinsic::invariant_end:
-      return false;
-    }
-  }
-  return true;
+  return !match(I, m_CombineOr(m_Intrinsic<Intrinsic::invariant_start>(),
+                               m_Intrinsic<Intrinsic::invariant_end>()));
 }
 
 static inline void reportFatalOnTokenType(const Instruction *I) {
@@ -1640,21 +1625,9 @@ static void createSaturatedConversionDecoration(Instruction *I,
 }
 
 static void addSaturatedDecorationToIntrinsic(Instruction *I, IRBuilder<> &B) {
-  if (auto *CI = dyn_cast<CallInst>(I)) {
-    if (Function *Fu = CI->getCalledFunction()) {
-      if (Fu->isIntrinsic()) {
-        unsigned const int IntrinsicId = Fu->getIntrinsicID();
-        switch (IntrinsicId) {
-        case Intrinsic::fptosi_sat:
-        case Intrinsic::fptoui_sat:
-          createSaturatedConversionDecoration(I, B);
-          break;
-        default:
-          break;
-        }
-      }
-    }
-  }
+  if (match(I, m_CombineOr(m_Intrinsic<Intrinsic::fptosi_sat>(),
+                           m_Intrinsic<Intrinsic::fptoui_sat>())))
+    createSaturatedConversionDecoration(I, B);
 }
 
 Instruction *SPIRVEmitIntrinsics::visitCallInst(CallInst &Call) {
@@ -1745,12 +1718,7 @@ Instruction *SPIRVEmitIntrinsics::visitSwitchInst(SwitchInst &I) {
 }
 
 static bool isFirstIndexZero(const GetElementPtrInst *GEP) {
-  if (GEP->getNumIndices() == 0)
-    return false;
-  if (const auto *CI = dyn_cast<ConstantInt>(GEP->getOperand(1))) {
-    return CI->getZExtValue() == 0;
-  }
-  return false;
+  return GEP->getNumIndices() > 0 && match(GEP->getOperand(1), m_Zero());
 }
 
 Instruction *SPIRVEmitIntrinsics::visitIntrinsicInst(IntrinsicInst &I) {
@@ -2496,19 +2464,15 @@ bool SPIRVEmitIntrinsics::shouldTryToAddMemAliasingDecoration(
   // Add aliasing decorations to internal load and store intrinsics
   // and atomic instructions, skipping atomic store as it won't have ID to
   // attach the decoration.
-  CallInst *CI = dyn_cast<CallInst>(Inst);
+  if (match(Inst, m_CombineOr(m_Intrinsic<Intrinsic::spv_load>(),
+                              m_Intrinsic<Intrinsic::spv_store>())))
+    return true;
+  auto *CI = dyn_cast<CallInst>(Inst);
   if (!CI)
     return false;
   if (Function *Fun = CI->getCalledFunction()) {
-    if (Fun->isIntrinsic()) {
-      switch (Fun->getIntrinsicID()) {
-      case Intrinsic::spv_load:
-      case Intrinsic::spv_store:
-        return true;
-      default:
-        return false;
-      }
-    }
+    if (Fun->isIntrinsic())
+      return false;
     std::string Name = getOclOrSpirvBuiltinDemangledName(Fun->getName());
     const std::string Prefix = "__spirv_Atomic";
     const bool IsAtomic = Name.find(Prefix) == 0;
@@ -3074,8 +3038,7 @@ SPIRVEmitIntrinsics::simplifyZeroLengthArrayGepInst(GetElementPtrInst *GEP) {
   Type *SrcTy = GEP->getSourceElementType();
   SmallVector<Value *, 8> Indices(GEP->indices());
   ArrayType *ArrTy = dyn_cast<ArrayType>(SrcTy);
-  if (ArrTy && ArrTy->getNumElements() == 0 &&
-      PatternMatch::match(Indices[0], PatternMatch::m_Zero())) {
+  if (ArrTy && ArrTy->getNumElements() == 0 && match(Indices[0], m_Zero())) {
     Indices.erase(Indices.begin());
     SrcTy = ArrTy->getElementType();
     return GetElementPtrInst::Create(SrcTy, GEP->getPointerOperand(), Indices,