[llvm-opt-report] Left justify unrolling counts, etc.

In the left part of the reports, we have things like U<number>; if some of
these numbers use more digits than others, we don't want a space in between the
U and the start of the number. Instead, the space should come afterward. This
way it is clear that the number goes with the U and not any other optimization
indicator that might come later on the line.

Tests committed in r283518.

llvm-svn: 283519

1 files changed, 12 insertions, 5 deletions

diff --git a/llvm/tools/llvm-opt-report/OptReport.cpp b/llvm/tools/llvm-opt-report/OptReport.cpp
index 0e5d7b7fbc6..b82a73b6d94 100644
--- a/llvm/tools/llvm-opt-report/OptReport.cpp
+++ b/llvm/tools/llvm-opt-report/OptReport.cpp
@@ -412,8 +412,12 @@ static bool writeReport(LocationInfoTy &LocationInfo) {
         auto UStr = [UCDigits](OptReportLocationInfo &LLI) {
           std::string R;
           raw_string_ostream RS(R);
-          if (!Succinct)
-            RS << llvm::format_decimal(LLI.UnrollCount, UCDigits);
+
+          if (!Succinct) {
+            RS << LLI.UnrollCount;
+            RS << std::string(UCDigits - RS.str().size(), ' ');
+          }
+
           return RS.str();
         };
 
@@ -421,9 +425,12 @@ static bool writeReport(LocationInfoTy &LocationInfo) {
                      ICDigits](OptReportLocationInfo &LLI) -> std::string {
           std::string R;
           raw_string_ostream RS(R);
-          if (!Succinct)
-           RS << llvm::format_decimal(LLI.VectorizationFactor, VFDigits) <<
-                   "," << llvm::format_decimal(LLI.InterleaveCount, ICDigits);
+
+          if (!Succinct) {
+            RS << LLI.VectorizationFactor << "," << LLI.InterleaveCount;
+            RS << std::string(VFDigits + ICDigits + 1 - RS.str().size(), ' ');
+          }
+
           return RS.str();
         };