[llvm] [llvm-mca][FeatureRequest] Itimeline graph, note source of delay for each instruction (PR #136423)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions h,cpp -- llvm/tools/llvm-mca/Views/TimelineView.cpp llvm/tools/llvm-mca/Views/TimelineView.h
``````````

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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/llvm/tools/llvm-mca/Views/TimelineView.cpp b/llvm/tools/llvm-mca/Views/TimelineView.cpp
index 16534328b..bdbc0d916 100644
--- a/llvm/tools/llvm-mca/Views/TimelineView.cpp
+++ b/llvm/tools/llvm-mca/Views/TimelineView.cpp
@@ -235,9 +235,9 @@ void TimelineView::printTimelineViewEntry(formatted_raw_ostream &OS,
     // Zero latency instructions have the same value for CycleDispatched,
     // CycleIssued and CycleExecuted.
     for (unsigned I = CycleDispatched + 1, E = Entry.CycleIssued; I < E; ++I)
-      if (I >= Entry.CycleReady) 
+      if (I >= Entry.CycleReady)
         OS << TimelineView::DisplayChar::Waiting;
-      else 
+      else
         OS << TimelineView::DisplayChar::Pending;
 
     if (Entry.CycleIssued == Entry.CycleExecuted)
@@ -265,12 +265,12 @@ void TimelineView::printTimelineViewEntry(formatted_raw_ostream &OS,
 static void printTimelineHeader(formatted_raw_ostream &OS, unsigned Cycles) {
   OS << "\n\nTimeline view:\n"
         "D: Instruction dispatched\n";
-        "e: Instruction executing\n";
-        "E: Instruction executed (write-back stage)\n";
-        "P: Instruction waiting for data dependency\n";
-        "=: Instruction waiting for available HW resource\n";
-        "-: Instruction executed, waiting to retire in order.\n";
-        '\n';
+  "e: Instruction executing\n";
+  "E: Instruction executed (write-back stage)\n";
+  "P: Instruction waiting for data dependency\n";
+  "=: Instruction waiting for available HW resource\n";
+  "-: Instruction executed, waiting to retire in order.\n";
+  '\n';
   if (Cycles >= 10) {
     OS.PadToColumn(10);
     for (unsigned I = 0; I <= Cycles; ++I) {

``````````

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https://github.com/llvm/llvm-project/pull/136423