[llvm-opt-report] Don't leave space for opts that never happen

Because screen space is precious, if an optimization (vectorization, for
example) never happens, don't leave empty space for the associated markers on
every line of the output. This makes the output much more compact, and allows
for the later inclusion of markers for more (although perhaps rare)
optimizations.

llvm-svn: 283626

1 files changed, 13 insertions, 6 deletions

diff --git a/llvm/tools/llvm-opt-report/OptReport.cpp b/llvm/tools/llvm-opt-report/OptReport.cpp
index b82a73b6d94..0f0faa832bd 100644
--- a/llvm/tools/llvm-opt-report/OptReport.cpp
+++ b/llvm/tools/llvm-opt-report/OptReport.cpp
@@ -332,6 +332,10 @@ static bool writeReport(LocationInfoTy &LocationInfo) {
         for (auto &LI : FI.second)
           MaxLI |= LI.second;
 
+    bool NothingInlined = !MaxLI.Inlined.Transformed;
+    bool NothingUnrolled = !MaxLI.Unrolled.Transformed;
+    bool NothingVectorized = !MaxLI.Vectorized.Transformed;
+
     unsigned VFDigits = llvm::utostr(MaxLI.VectorizationFactor).size();
     unsigned ICDigits = llvm::utostr(MaxLI.InterleaveCount).size();
     unsigned UCDigits = llvm::utostr(MaxLI.UnrollCount).size();
@@ -435,11 +439,12 @@ static bool writeReport(LocationInfoTy &LocationInfo) {
         };
 
         OS << llvm::format_decimal(L, LNDigits) << " ";
-        OS << (LLI.Inlined.Transformed && InlinedCols < 2 ? "I" : " ");
+        OS << (LLI.Inlined.Transformed && InlinedCols < 2 ? "I" :
+                (NothingInlined ? "" : " "));
         OS << (LLI.Unrolled.Transformed && UnrolledCols < 2 ?
-                "U" + UStr(LLI) : " " + USpaces);
+                "U" + UStr(LLI) : (NothingUnrolled ? "" : " " + USpaces));
         OS << (LLI.Vectorized.Transformed && VectorizedCols < 2 ?
-                "V" + VStr(LLI) : " " + VSpaces);
+                "V" + VStr(LLI) : (NothingVectorized ? "" : " " + VSpaces));
 
         OS << " | " << *LI << "\n";
 
@@ -449,11 +454,13 @@ static bool writeReport(LocationInfoTy &LocationInfo) {
               (J.second.Vectorized.Transformed && VectorizedCols > 1)) {
             OS << std::string(LNDigits + 1, ' ');
             OS << (J.second.Inlined.Transformed &&
-                   InlinedCols > 1 ? "I" : " ");
+                   InlinedCols > 1 ? "I" : (NothingInlined ? "" : " "));
             OS << (J.second.Unrolled.Transformed &&
-                   UnrolledCols > 1 ? "U" + UStr(J.second) : " " + USpaces);
+                   UnrolledCols > 1 ? "U" + UStr(J.second) :
+                     (NothingUnrolled ? "" : " " + USpaces));
             OS << (J.second.Vectorized.Transformed &&
-                   VectorizedCols > 1 ? "V" + VStr(J.second) : " " + VSpaces);
+                   VectorizedCols > 1 ? "V" + VStr(J.second) :
+                     (NothingVectorized ? "" : " " + VSpaces));
 
             OS << " | " << std::string(J.first - 1, ' ') << "^\n";
           }