[llvm] [MCA] Extend -instruction-tables option with verbosity levels (PR #130574)

[Min-Yih Hsu via llvm-commits]

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@@ -12,15 +12,45 @@
 //===----------------------------------------------------------------------===//
 
 #include "Views/InstructionInfoView.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/FormattedStream.h"
 #include "llvm/Support/JSON.h"
+#include "llvm/Support/WithColor.h"
 
 namespace llvm {
 namespace mca {
 
+void InstructionInfoView::getComment(raw_ostream &OS, const MCInst &MCI) const {
+  StringRef S = MCI.getLoc().getPointer();
+  StringRef InstrStr;
+  size_t Pos = 0, PosCmt = 0;
+
+  // Recognized comments are after assembly instructions on the same line.
+  // It is usefull to add in comment scheduling information from architecture
+  // specification.
+  // '#' comment mark is not supported by llvm-mca
+
+  if (Pos = S.find("\n"); Pos != StringRef::npos) {
+    InstrStr = S.take_front(Pos);
+    // C style comment
+    if (((PosCmt = InstrStr.find("/*")) != StringRef::npos) &&
+        ((Pos = InstrStr.find("*/")) != StringRef::npos)) {
+      OS << InstrStr.substr(PosCmt, Pos);
+      return;
+    }
+    // C++ style comment
+    if ((PosCmt = InstrStr.find("//")) != StringRef::npos) {
+      OS << InstrStr.substr(PosCmt);
+      return;
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mshockwave wrote:

redundant return

https://github.com/llvm/llvm-project/pull/130574