[llvm] [LLVM] Change `Intrinsic::getBaseName` to return `std::string` (PR #111613)
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Wed Oct 9 14:54:15 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-ir
Author: Rahul Joshi (jurahul)
<details>
<summary>Changes</summary>
Change `Intrinsic::getName()` and `Intrinsic::getBaseName()` to return `std::string`. This is in preparation for reducing the size of the static intrinsic string table as described in https://discourse.llvm.org/t/rfc-compress-intrinsic-name-table/82412
---
Full diff: https://github.com/llvm/llvm-project/pull/111613.diff
14 Files Affected:
- (modified) llvm/include/llvm-c/Core.h (+13-8)
- (modified) llvm/include/llvm/IR/Intrinsics.h (+2-2)
- (modified) llvm/lib/Analysis/IRSimilarityIdentifier.cpp (+1-1)
- (modified) llvm/lib/CodeGen/ReplaceWithVeclib.cpp (+1-1)
- (modified) llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp (+1-1)
- (modified) llvm/lib/IR/Core.cpp (+23-10)
- (modified) llvm/lib/IR/Intrinsics.cpp (+2-2)
- (modified) llvm/lib/Target/AMDGPU/AMDGPULowerKernelArguments.cpp (+2-2)
- (modified) llvm/lib/Target/AMDGPU/AMDGPULowerKernelAttributes.cpp (+1-2)
- (modified) llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp (+2-2)
- (modified) llvm/lib/Transforms/Vectorize/LoopVectorize.cpp (+3-4)
- (modified) llvm/lib/Transforms/Vectorize/VPlan.h (+1-1)
- (modified) llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp (+1-1)
- (modified) llvm/unittests/IR/IntrinsicsTest.cpp (+83)
``````````diff
diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index 28dc270ca368d2..d9eafd01efc709 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -2833,11 +2833,17 @@ LLVMTypeRef LLVMIntrinsicGetType(LLVMContextRef Ctx, unsigned ID,
*/
const char *LLVMIntrinsicGetName(unsigned ID, size_t *NameLength);
+/**
+ * Retrieves the name of an intrinsic. The caller is responsible for freeing the
+ * returned string.
+ *
+ * @see llvm::Intrinsic::getName()
+ */
+char *LLVMIntrinsicCopyName(unsigned ID, size_t *NameLength);
+
/** Deprecated: Use LLVMIntrinsicCopyOverloadedName2 instead. */
-const char *LLVMIntrinsicCopyOverloadedName(unsigned ID,
- LLVMTypeRef *ParamTypes,
- size_t ParamCount,
- size_t *NameLength);
+char *LLVMIntrinsicCopyOverloadedName(unsigned ID, LLVMTypeRef *ParamTypes,
+ size_t ParamCount, size_t *NameLength);
/**
* Copies the name of an overloaded intrinsic identified by a given list of
@@ -2850,10 +2856,9 @@ const char *LLVMIntrinsicCopyOverloadedName(unsigned ID,
*
* @see llvm::Intrinsic::getName()
*/
-const char *LLVMIntrinsicCopyOverloadedName2(LLVMModuleRef Mod, unsigned ID,
- LLVMTypeRef *ParamTypes,
- size_t ParamCount,
- size_t *NameLength);
+char *LLVMIntrinsicCopyOverloadedName2(LLVMModuleRef Mod, unsigned ID,
+ LLVMTypeRef *ParamTypes,
+ size_t ParamCount, size_t *NameLength);
/**
* Obtain if the intrinsic identified by the given ID is overloaded.
diff --git a/llvm/include/llvm/IR/Intrinsics.h b/llvm/include/llvm/IR/Intrinsics.h
index b251036247c5c0..292300e9326f9c 100644
--- a/llvm/include/llvm/IR/Intrinsics.h
+++ b/llvm/include/llvm/IR/Intrinsics.h
@@ -52,11 +52,11 @@ namespace Intrinsic {
/// Return the LLVM name for an intrinsic, such as "llvm.ppc.altivec.lvx".
/// Note, this version is for intrinsics with no overloads. Use the other
/// version of getName if overloads are required.
- StringRef getName(ID id);
+ std::string getName(ID id);
/// Return the LLVM name for an intrinsic, without encoded types for
/// overloading, such as "llvm.ssa.copy".
- StringRef getBaseName(ID id);
+ std::string getBaseName(ID id);
/// Return the LLVM name for an intrinsic, such as "llvm.ppc.altivec.lvx" or
/// "llvm.ssa.copy.p0s_s.1". Note, this version of getName supports overloads.
diff --git a/llvm/lib/Analysis/IRSimilarityIdentifier.cpp b/llvm/lib/Analysis/IRSimilarityIdentifier.cpp
index 42e986e6179dd3..3f5aa90a50d54f 100644
--- a/llvm/lib/Analysis/IRSimilarityIdentifier.cpp
+++ b/llvm/lib/Analysis/IRSimilarityIdentifier.cpp
@@ -147,7 +147,7 @@ void IRInstructionData::setCalleeName(bool MatchByName) {
Intrinsic::getName(IntrinsicID, FT->params(), II->getModule(), FT);
// If there is not an overloaded name, we only need to use this version.
else
- CalleeName = Intrinsic::getName(IntrinsicID).str();
+ CalleeName = Intrinsic::getName(IntrinsicID);
return;
}
diff --git a/llvm/lib/CodeGen/ReplaceWithVeclib.cpp b/llvm/lib/CodeGen/ReplaceWithVeclib.cpp
index 9fbb7b461364b1..34458a780690a1 100644
--- a/llvm/lib/CodeGen/ReplaceWithVeclib.cpp
+++ b/llvm/lib/CodeGen/ReplaceWithVeclib.cpp
@@ -130,7 +130,7 @@ static bool replaceWithCallToVeclib(const TargetLibraryInfo &TLI,
std::string ScalarName =
Intrinsic::isOverloaded(IID)
? Intrinsic::getName(IID, ScalarArgTypes, II->getModule())
- : Intrinsic::getName(IID).str();
+ : Intrinsic::getName(IID);
// Try to find the mapping for the scalar version of this intrinsic and the
// exact vector width of the call operands in the TargetLibraryInfo. First,
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
index 56fc538172f9fc..7f1d0452311ce2 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
@@ -161,7 +161,7 @@ std::string SDNode::getOperationName(const SelectionDAG *G) const {
unsigned OpNo = getOpcode() == ISD::INTRINSIC_WO_CHAIN ? 0 : 1;
unsigned IID = getOperand(OpNo)->getAsZExtVal();
if (IID < Intrinsic::num_intrinsics)
- return Intrinsic::getBaseName((Intrinsic::ID)IID).str();
+ return Intrinsic::getBaseName((Intrinsic::ID)IID);
if (!G)
return "Unknown intrinsic";
if (const TargetIntrinsicInfo *TII = G->getTarget().getIntrinsicInfo())
diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index ee084e870263d0..410482d3310cce 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -39,12 +39,14 @@
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Mutex.h"
#include "llvm/Support/Threading.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstdlib>
#include <cstring>
#include <system_error>
+#include <unordered_map>
using namespace llvm;
@@ -2472,10 +2474,24 @@ LLVMValueRef LLVMGetIntrinsicDeclaration(LLVMModuleRef Mod,
}
const char *LLVMIntrinsicGetName(unsigned ID, size_t *NameLength) {
+ static std::unordered_map<Intrinsic::ID, std::string> IntrinsicNamePool;
+ static sys::Mutex Mutex;
auto IID = llvm_map_to_intrinsic_id(ID);
- auto Str = llvm::Intrinsic::getName(IID);
+
+ std::lock_guard<sys::Mutex> Guard(Mutex);
+ auto [Iter, Inserted] = IntrinsicNamePool.try_emplace(IID);
+ if (Inserted)
+ Iter->second = llvm::Intrinsic::getName(IID);
+ const std::string &Name = Iter->second;
+ *NameLength = Name.size();
+ return Name.data();
+}
+
+char *LLVMIntrinsicCopyName(unsigned ID, size_t *NameLength) {
+ auto IID = llvm_map_to_intrinsic_id(ID);
+ std::string Str = llvm::Intrinsic::getName(IID);
*NameLength = Str.size();
- return Str.data();
+ return strdup(Str.c_str());
}
LLVMTypeRef LLVMIntrinsicGetType(LLVMContextRef Ctx, unsigned ID,
@@ -2485,10 +2501,8 @@ LLVMTypeRef LLVMIntrinsicGetType(LLVMContextRef Ctx, unsigned ID,
return wrap(llvm::Intrinsic::getType(*unwrap(Ctx), IID, Tys));
}
-const char *LLVMIntrinsicCopyOverloadedName(unsigned ID,
- LLVMTypeRef *ParamTypes,
- size_t ParamCount,
- size_t *NameLength) {
+char *LLVMIntrinsicCopyOverloadedName(unsigned ID, LLVMTypeRef *ParamTypes,
+ size_t ParamCount, size_t *NameLength) {
auto IID = llvm_map_to_intrinsic_id(ID);
ArrayRef<Type*> Tys(unwrap(ParamTypes), ParamCount);
auto Str = llvm::Intrinsic::getNameNoUnnamedTypes(IID, Tys);
@@ -2496,10 +2510,9 @@ const char *LLVMIntrinsicCopyOverloadedName(unsigned ID,
return strdup(Str.c_str());
}
-const char *LLVMIntrinsicCopyOverloadedName2(LLVMModuleRef Mod, unsigned ID,
- LLVMTypeRef *ParamTypes,
- size_t ParamCount,
- size_t *NameLength) {
+char *LLVMIntrinsicCopyOverloadedName2(LLVMModuleRef Mod, unsigned ID,
+ LLVMTypeRef *ParamTypes,
+ size_t ParamCount, size_t *NameLength) {
auto IID = llvm_map_to_intrinsic_id(ID);
ArrayRef<Type *> Tys(unwrap(ParamTypes), ParamCount);
auto Str = llvm::Intrinsic::getName(IID, Tys, unwrap(Mod));
diff --git a/llvm/lib/IR/Intrinsics.cpp b/llvm/lib/IR/Intrinsics.cpp
index ef26b1926b9767..a6c63b716d0534 100644
--- a/llvm/lib/IR/Intrinsics.cpp
+++ b/llvm/lib/IR/Intrinsics.cpp
@@ -44,12 +44,12 @@ static constexpr const char *const IntrinsicNameTable[] = {
#undef GET_INTRINSIC_NAME_TABLE
};
-StringRef Intrinsic::getBaseName(ID id) {
+std::string Intrinsic::getBaseName(ID id) {
assert(id < num_intrinsics && "Invalid intrinsic ID!");
return IntrinsicNameTable[id];
}
-StringRef Intrinsic::getName(ID id) {
+std::string Intrinsic::getName(ID id) {
assert(id < num_intrinsics && "Invalid intrinsic ID!");
assert(!Intrinsic::isOverloaded(id) &&
"This version of getName does not support overloading");
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULowerKernelArguments.cpp b/llvm/lib/Target/AMDGPU/AMDGPULowerKernelArguments.cpp
index d16c96f88e7b1e..d665530fb7570e 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULowerKernelArguments.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULowerKernelArguments.cpp
@@ -171,8 +171,8 @@ class PreloadKernelArgInfo {
// Try to allocate SGPRs to preload implicit kernel arguments.
void tryAllocImplicitArgPreloadSGPRs(uint64_t ImplicitArgsBaseOffset,
IRBuilder<> &Builder) {
- StringRef Name = Intrinsic::getName(Intrinsic::amdgcn_implicitarg_ptr);
- Function *ImplicitArgPtr = F.getParent()->getFunction(Name);
+ Function *ImplicitArgPtr = F.getParent()->getFunction(
+ Intrinsic::getName(Intrinsic::amdgcn_implicitarg_ptr));
if (!ImplicitArgPtr)
return;
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULowerKernelAttributes.cpp b/llvm/lib/Target/AMDGPU/AMDGPULowerKernelAttributes.cpp
index 7d66d07c9d0fb7..001050d7ad8200 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULowerKernelAttributes.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULowerKernelAttributes.cpp
@@ -78,8 +78,7 @@ class AMDGPULowerKernelAttributes : public ModulePass {
Function *getBasePtrIntrinsic(Module &M, bool IsV5OrAbove) {
auto IntrinsicId = IsV5OrAbove ? Intrinsic::amdgcn_implicitarg_ptr
: Intrinsic::amdgcn_dispatch_ptr;
- StringRef Name = Intrinsic::getName(IntrinsicId);
- return M.getFunction(Name);
+ return M.getFunction(Intrinsic::getName(IntrinsicId));
}
} // end anonymous namespace
diff --git a/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp b/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp
index 0d98e844cf91ea..7bdee8bb54d115 100644
--- a/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp
+++ b/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp
@@ -2278,8 +2278,8 @@ class LowerMatrixIntrinsics {
return;
}
auto *II = cast<IntrinsicInst>(CI);
- write(Intrinsic::getBaseName(II->getIntrinsicID())
- .drop_front(StringRef("llvm.matrix.").size()));
+ std::string IntName = Intrinsic::getBaseName(II->getIntrinsicID());
+ write(StringRef(IntName).drop_front(StringRef("llvm.matrix.").size()));
write(".");
std::string Tmp;
raw_string_ostream SS(Tmp);
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 517175c8afeef0..cabf51e5fd9997 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4389,18 +4389,17 @@ void LoopVectorizationPlanner::emitInvalidCostRemarks(
OS << (Pair.second == Subset.front().second ? "" : ", ") << Pair.second;
OS << "):";
if (Opcode == Instruction::Call) {
- StringRef Name = "";
+ OS << " call to ";
if (auto *Int = dyn_cast<VPWidenIntrinsicRecipe>(R)) {
- Name = Int->getIntrinsicName();
+ OS << Int->getIntrinsicName();
} else {
auto *WidenCall = dyn_cast<VPWidenCallRecipe>(R);
Function *CalledFn =
WidenCall ? WidenCall->getCalledScalarFunction()
: cast<Function>(R->getOperand(R->getNumOperands() - 1)
->getLiveInIRValue());
- Name = CalledFn->getName();
+ OS << CalledFn->getName();
}
- OS << " call to " << Name;
} else
OS << " " << Instruction::getOpcodeName(Opcode);
reportVectorizationInfo(OutString, "InvalidCost", ORE, OrigLoop, nullptr,
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index 68a62638b9d588..e6e8b8d4726f07 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -1670,7 +1670,7 @@ class VPWidenIntrinsicRecipe : public VPRecipeWithIRFlags {
Type *getResultType() const { return ResultTy; }
/// Return to name of the intrinsic as string.
- StringRef getIntrinsicName() const;
+ std::string getIntrinsicName() const;
/// Returns true if the intrinsic may read from memory.
bool mayReadFromMemory() const { return MayReadFromMemory; }
diff --git a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
index ba94cd29587664..305b5eb53d1226 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
@@ -1038,7 +1038,7 @@ InstructionCost VPWidenIntrinsicRecipe::computeCost(ElementCount VF,
return Ctx.TTI.getIntrinsicInstrCost(CostAttrs, CostKind);
}
-StringRef VPWidenIntrinsicRecipe::getIntrinsicName() const {
+std::string VPWidenIntrinsicRecipe::getIntrinsicName() const {
return Intrinsic::getBaseName(VectorIntrinsicID);
}
diff --git a/llvm/unittests/IR/IntrinsicsTest.cpp b/llvm/unittests/IR/IntrinsicsTest.cpp
index 0c4af28a2ab57b..4dead563ec9971 100644
--- a/llvm/unittests/IR/IntrinsicsTest.cpp
+++ b/llvm/unittests/IR/IntrinsicsTest.cpp
@@ -7,6 +7,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/IR/Intrinsics.h"
+#include "llvm-c/Core.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/IRBuilder.h"
@@ -25,6 +26,7 @@
#include "llvm/IR/IntrinsicsS390.h"
#include "llvm/IR/IntrinsicsX86.h"
#include "llvm/IR/Module.h"
+#include "llvm/Support/Parallel.h"
#include "gtest/gtest.h"
using namespace llvm;
@@ -127,6 +129,87 @@ TEST(IntrinsicNameLookup, MSBuiltinLookup) {
EXPECT_EQ(ID, getIntrinsicForMSBuiltin(Target, Builtin));
}
+// Test C API to get/copy LLVM intrinsic name.
+TEST(IntrinsicNameLookup, LLVMIntrinsicGetCopyNameSimple) {
+ static constexpr struct {
+ Intrinsic::ID ID;
+ const char *Name;
+ } Tests[] = {{Intrinsic::not_intrinsic, "not_intrinsic"},
+ {Intrinsic::assume, "llvm.assume"},
+ {Intrinsic::coro_free, "llvm.coro.free"},
+ {Intrinsic::aarch64_break, "llvm.aarch64.break"},
+ {Intrinsic::x86_int, "llvm.x86.int"}};
+
+ for (auto [ID, ExpectedName] : Tests) {
+ size_t NameSize = 0;
+ const char *CName = LLVMIntrinsicGetName(ID, &NameSize);
+ StringRef Name(CName, NameSize);
+
+ // Verify we get correct name.
+ EXPECT_EQ(Name, ExpectedName);
+ const char *CName1 = LLVMIntrinsicGetName(ID, &NameSize);
+
+ // Verify we get the same pointer and length the second time.
+ EXPECT_EQ(CName, CName1);
+ EXPECT_EQ(NameSize, Name.size());
+ }
+
+ for (auto [ID, ExpectedName] : Tests) {
+ size_t NameSize = 0;
+ // Now test the copy API.
+ char *CName = LLVMIntrinsicCopyName(ID, &NameSize);
+ StringRef Name(CName, NameSize);
+
+ // Verify we get correct name.
+ EXPECT_EQ(Name, ExpectedName);
+
+ // Verify we get the different pointer and same length the second time.
+ char *CName1 = LLVMIntrinsicCopyName(ID, &NameSize);
+ EXPECT_NE(CName, CName1);
+ EXPECT_EQ(NameSize, Name.size());
+
+ free(CName);
+ free(CName1);
+ }
+}
+
+// Test correctness of `LLVMIntrinsicGetName` when exercised in a multi-threaded
+// manner.
+TEST(IntrinsicNameLookup, LLVMIntrinsicGetNameMultiThreaded) {
+ constexpr unsigned NUM_TASKS = 16;
+ constexpr unsigned STEP = 40;
+ std::map<unsigned, StringRef> LookupResults[NUM_TASKS];
+
+ parallelFor(0, NUM_TASKS, [&](size_t Idx) {
+ for (unsigned ID = 0; ID < Intrinsic::num_intrinsics; ID += STEP) {
+ if (LLVMIntrinsicIsOverloaded(ID))
+ continue;
+ size_t NameSize;
+ const char *Name = LLVMIntrinsicGetName(ID, &NameSize);
+ LookupResults[Idx].insert({ID, StringRef(Name, NameSize)});
+ }
+ });
+
+ // Make sure we have atleast a few intrinsics to test.
+ for (const auto &Map : LookupResults)
+ EXPECT_GE(Map.size(), 10U);
+
+ // Validate data.
+ for (unsigned ID = 0; ID < Intrinsic::num_intrinsics; ID += STEP) {
+ if (LLVMIntrinsicIsOverloaded(ID))
+ continue;
+ size_t NameSize;
+ const char *CName = LLVMIntrinsicGetName(ID, &NameSize);
+ StringRef Name(CName, NameSize);
+ for (const auto &Map : LookupResults) {
+ auto Iter = Map.find(ID);
+ ASSERT_NE(Iter, Map.end());
+ EXPECT_EQ(Iter->second.size(), Name.size());
+ EXPECT_EQ(Iter->second.data(), Name.data());
+ }
+ }
+}
+
TEST_F(IntrinsicsTest, InstrProfInheritance) {
auto isInstrProfInstBase = [](const Instruction &I) {
return isa<InstrProfInstBase>(I);
``````````
</details>
https://github.com/llvm/llvm-project/pull/111613
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