[llvm] 0a869ef - [llvm-mca][timeline] Indicate output was stopped due to cycle limit.

[Daniel Sanders via llvm-commits]

Author: Daniel Sanders
Date: 2021-10-14T11:10:09-07:00
New Revision: 0a869ef3a844b3fcb64c5a1d9c7a5d4988b00c07

URL: https://github.com/llvm/llvm-project/commit/0a869ef3a844b3fcb64c5a1d9c7a5d4988b00c07
DIFF: https://github.com/llvm/llvm-project/commit/0a869ef3a844b3fcb64c5a1d9c7a5d4988b00c07.diff

LOG: [llvm-mca][timeline] Indicate output was stopped due to cycle limit.

It can be a bit confusing to stop with no explanation so we should indicate
when further output was prevented by the cycle limit.

Differential Revision: https://reviews.llvm.org/D111753

Added: 
    

Modified: 
    llvm/tools/llvm-mca/Views/TimelineView.cpp

Removed: 
    


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diff  --git a/llvm/tools/llvm-mca/Views/TimelineView.cpp b/llvm/tools/llvm-mca/Views/TimelineView.cpp
index 4ecc3015529ce..5c05edbdea686 100644
--- a/llvm/tools/llvm-mca/Views/TimelineView.cpp
+++ b/llvm/tools/llvm-mca/Views/TimelineView.cpp
@@ -296,8 +296,10 @@ void TimelineView::printTimeline(raw_ostream &OS) const {
       // attribute is set correctly whether or not it is greater
       // than timeline-max-cycles so we can use that to ensure
       // we don't early exit because of a 0 latency instruction.
-      if (Entry.CycleRetired == 0 && Entry.CycleExecuted != 0)
+      if (Entry.CycleRetired == 0 && Entry.CycleExecuted != 0) {
+        FOS << "Truncated display due to cycle limit\n";
         return;
+      }
 
       unsigned SourceIndex = IID % Source.size();
       printTimelineViewEntry(FOS, Entry, Iteration, SourceIndex);