[llvm] r271360 - DwarfDebug: Simplify. NFC.

[Peter Collingbourne via llvm-commits]

Author: pcc
Date: Tue May 31 21:58:40 2016
New Revision: 271360

URL: http://llvm.org/viewvc/llvm-project?rev=271360&view=rev
Log:
DwarfDebug: Simplify. NFC.

Modified:
    llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp?rev=271360&r1=271359&r2=271360&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Tue May 31 21:58:40 2016
@@ -470,12 +470,8 @@ void DwarfDebug::beginModule() {
 
   const Module *M = MMI->getModule();
 
-  unsigned NumDebugCUs = 0;
-  for (DICompileUnit *CUNode : M->debug_compile_units()) {
-    (void)CUNode;
-    ++NumDebugCUs;
-  }
-
+  unsigned NumDebugCUs = std::distance(M->debug_compile_units_begin(),
+                                       M->debug_compile_units_end());
   // Tell MMI whether we have debug info.
   MMI->setDebugInfoAvailability(NumDebugCUs > 0);
   SingleCU = NumDebugCUs == 1;