[llvm-cov] Add the "Go to first unexecuted line" feature.
This patch provides easy navigation to find the zero count lines, especially useful when the source file is very large.
Differential Revision: https://reviews.llvm.org/D23277
llvm-svn: 280739
diff --git a/llvm/tools/llvm-cov/SourceCoverageView.cpp b/llvm/tools/llvm-cov/SourceCoverageView.cpp
index b61d791..323352a 100644
--- a/llvm/tools/llvm-cov/SourceCoverageView.cpp
+++ b/llvm/tools/llvm-cov/SourceCoverageView.cpp
@@ -82,6 +82,25 @@
llvm_unreachable("Unknown coverage output format!");
}
+unsigned SourceCoverageView::getFirstUncoveredLineNo() {
+ auto CheckIfUncovered = [](const coverage::CoverageSegment &S) {
+ return S.HasCount && S.Count == 0;
+ };
+ // L is less than R if (1) it's an uncovered segment (has a 0 count), and (2)
+ // either R is not an uncovered segment, or L has a lower line number than R.
+ const auto MinSegIt =
+ std::min_element(CoverageInfo.begin(), CoverageInfo.end(),
+ [CheckIfUncovered](const coverage::CoverageSegment &L,
+ const coverage::CoverageSegment &R) {
+ return (CheckIfUncovered(L) &&
+ (!CheckIfUncovered(R) || (L.Line < R.Line)));
+ });
+ if (CheckIfUncovered(*MinSegIt))
+ return (*MinSegIt).Line;
+ // There is no uncovered line, return zero.
+ return 0;
+}
+
std::string SourceCoverageView::formatCount(uint64_t N) {
std::string Number = utostr(N);
int Len = Number.size();
@@ -142,8 +161,12 @@
renderViewHeader(OS);
+ unsigned FirstUncoveredLineNo = 0;
+ if (WholeFile)
+ FirstUncoveredLineNo = getFirstUncoveredLineNo();
+
if (ShowSourceName)
- renderSourceName(OS, WholeFile);
+ renderSourceName(OS, WholeFile, FirstUncoveredLineNo);
renderTableHeader(OS, ViewDepth);
// We need the expansions and instantiations sorted so we can go through them