[llvm-exegesis][NFC] Split BenchmarkRunner class

Summary:
The snippet-generation part goes to the SnippetGenerator class.

This will allow benchmarking arbitrary code (see PR38437).

Reviewers: gchatelet

Subscribers: mgorny, tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D51979

llvm-svn: 342117

1 files changed, 6 insertions, 4 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/Latency.cpp b/llvm/tools/llvm-exegesis/lib/Latency.cpp
index b8452ac35a8..d09cdc597fd 100644
--- a/llvm/tools/llvm-exegesis/lib/Latency.cpp
+++ b/llvm/tools/llvm-exegesis/lib/Latency.cpp
@@ -29,9 +29,9 @@ static bool hasMemoryOperand(const llvm::MCOperandInfo &OpInfo) {
   return OpInfo.OperandType == llvm::MCOI::OPERAND_MEMORY;
 }
 
-LatencyBenchmarkRunner::~LatencyBenchmarkRunner() = default;
+LatencySnippetGenerator::~LatencySnippetGenerator() = default;
 
-llvm::Error LatencyBenchmarkRunner::isInfeasible(
+llvm::Error LatencySnippetGenerator::isInfeasible(
     const llvm::MCInstrDesc &MCInstrDesc) const {
   if (llvm::any_of(MCInstrDesc.operands(), hasUnknownOperand))
     return llvm::make_error<BenchmarkFailure>(
@@ -43,7 +43,7 @@ llvm::Error LatencyBenchmarkRunner::isInfeasible(
 }
 
 llvm::Expected<CodeTemplate>
-LatencyBenchmarkRunner::generateTwoInstructionPrototype(
+LatencySnippetGenerator::generateTwoInstructionPrototype(
     const Instruction &Instr) const {
   std::vector<unsigned> Opcodes;
   Opcodes.resize(State.getInstrInfo().getNumOpcodes());
@@ -80,7 +80,7 @@ LatencyBenchmarkRunner::generateTwoInstructionPrototype(
 }
 
 llvm::Expected<CodeTemplate>
-LatencyBenchmarkRunner::generateCodeTemplate(unsigned Opcode) const {
+LatencySnippetGenerator::generateCodeTemplate(unsigned Opcode) const {
   const auto &InstrDesc = State.getInstrInfo().get(Opcode);
   if (auto E = isInfeasible(InstrDesc))
     return std::move(E);
@@ -105,6 +105,8 @@ const char *LatencyBenchmarkRunner::getCounterName() const {
   return CounterName;
 }
 
+LatencyBenchmarkRunner::~LatencyBenchmarkRunner() = default;
+
 std::vector<BenchmarkMeasure>
 LatencyBenchmarkRunner::runMeasurements(const ExecutableFunction &Function,
                                         ScratchSpace &Scratch,