[MCA] Allow unlimited cycles in the timeline view

Change --max-timeline-cycles=0 to mean no limit on the number of cycles.
Use this in AMDGPU tests to show all instructions in the timeline view
instead of having it arbitrarily truncated.

Differential Revision: https://reviews.llvm.org/D104846

2 files changed, 7 insertions, 7 deletions

diff --git a/llvm/tools/llvm-mca/Views/TimelineView.cpp b/llvm/tools/llvm-mca/Views/TimelineView.cpp
index df536b4..9a94976 100644
--- a/llvm/tools/llvm-mca/Views/TimelineView.cpp
+++ b/llvm/tools/llvm-mca/Views/TimelineView.cpp
@@ -21,8 +21,8 @@ TimelineView::TimelineView(const MCSubtargetInfo &sti, MCInstPrinter &Printer,
                            llvm::ArrayRef<llvm::MCInst> S, unsigned Iterations,
                            unsigned Cycles)
     : InstructionView(sti, Printer, S), CurrentCycle(0),
-      MaxCycle(Cycles == 0 ? 80 : Cycles), LastCycle(0), WaitTime(S.size()),
-      UsedBuffer(S.size()) {
+      MaxCycle(Cycles == 0 ? std::numeric_limits<unsigned>::max() : Cycles),
+      LastCycle(0), WaitTime(S.size()), UsedBuffer(S.size()) {
   unsigned NumInstructions = getSource().size();
   assert(Iterations && "Invalid number of iterations specified!");
   NumInstructions *= Iterations;
diff --git a/llvm/tools/llvm-mca/llvm-mca.cpp b/llvm/tools/llvm-mca/llvm-mca.cpp
index 4e47762..d35ba0d 100644
--- a/llvm/tools/llvm-mca/llvm-mca.cpp
+++ b/llvm/tools/llvm-mca/llvm-mca.cpp
@@ -176,11 +176,11 @@ static cl::opt<unsigned> TimelineMaxIterations(
     cl::desc("Maximum number of iterations to print in timeline view"),
     cl::cat(ViewOptions), cl::init(0));
 
-static cl::opt<unsigned> TimelineMaxCycles(
-    "timeline-max-cycles",
-    cl::desc(
-        "Maximum number of cycles in the timeline view. Defaults to 80 cycles"),
-    cl::cat(ViewOptions), cl::init(80));
+static cl::opt<unsigned>
+    TimelineMaxCycles("timeline-max-cycles",
+                      cl::desc("Maximum number of cycles in the timeline view, "
+                               "or 0 for unlimited. Defaults to 80 cycles"),
+                      cl::cat(ViewOptions), cl::init(80));
 
 static cl::opt<bool>
     AssumeNoAlias("noalias",