[STLExtras] Add distance() for ranges, pred_size(), and succ_size()
This commit adds a wrapper for std::distance() which works with ranges.
As it would be a common case to write `distance(predecessors(BB))`, this
also introduces `pred_size()` and `succ_size()` helpers to make that
easier to write.
Differential Revision: https://reviews.llvm.org/D46668
llvm-svn: 332057
diff --git a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
index c5c336c..d473741 100644
--- a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
+++ b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
@@ -489,7 +489,7 @@
V->print(errs());
errs() << '\n';
- OS << " Uses(" << std::distance(V->use_begin(),V->use_end()) << "):";
+ OS << " Uses(" << V->getNumUses() << "):";
for (const Use &U : V->uses()) {
if (&U != &*V->use_begin())
OS << ",";