[llvm-exegesis] Add a snippet generator to generate snippets to compute ROB sizes.

llvm-svn: 346394

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/tools/llvm-exegesis/llvm-exegesis.cpp b/llvm/tools/llvm-exegesis/llvm-exegesis.cpp
index a28e68ec006..6d15fcfef4e 100644
--- a/llvm/tools/llvm-exegesis/llvm-exegesis.cpp
+++ b/llvm/tools/llvm-exegesis/llvm-exegesis.cpp
@@ -63,6 +63,8 @@ static cl::opt<exegesis::InstructionBenchmark::ModeE>
                                         "latency", "Instruction Latency"),
                              clEnumValN(exegesis::InstructionBenchmark::Uops,
                                         "uops", "Uop Decomposition"),
+                             clEnumValN(exegesis::InstructionBenchmark::ROBSize,
+                                        "rob_size", "ROB Size"),
                              // When not asking for a specific benchmark mode,
                              // we'll analyse the results.
                              clEnumValN(exegesis::InstructionBenchmark::Unknown,
@@ -201,7 +203,6 @@ public:
       return;
     if (CommentText.consume_front("DEFREG")) {
       // LLVM-EXEGESIS-DEFREF <reg> <hex_value>
-      RegisterValue RegVal;
       llvm::SmallVector<llvm::StringRef, 2> Parts;
       CommentText.split(Parts, ' ', /*unlimited splits*/ -1,
                         /*do not keep empty strings*/ false);
@@ -210,6 +211,7 @@ public:
                      << "\n";
         ++InvalidComments;
       }
+      RegisterValue RegVal;
       if (!(RegVal.Register = findRegisterByName(Parts[0].trim()))) {
         llvm::errs() << "unknown register in 'LLVM-EXEGESIS-DEFREG "
                      << CommentText << "\n";