DebugInfo: Simplify Address Pool index handling.

Since the pool indexes are necessarily sequential and contiguous, just
insert things in the right place rather than having to sort the sequence
after the fact.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185842 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 401e67cf04e472e445df074c341897410883150c..6b06d8b99b3d72a17eafbc9c327e07c0a515ef31 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2385,19 +2385,17 @@ void DwarfUnits::emitAddresses(const MCSection *AddrSection) {
 
   // Get all of the address pool entries and put them in an array by their ID so
   // we can sort them.
-  SmallVector<std::pair<unsigned, const MCExpr *>, 64> Entries;
+  SmallVector<const MCExpr *, 64> Entries(AddressPool.size());
 
   for (DenseMap<const MCExpr *, unsigned>::iterator
            I = AddressPool.begin(),
            E = AddressPool.end();
        I != E; ++I)
-    Entries.push_back(std::make_pair(I->second, I->first));
-
-  array_pod_sort(Entries.begin(), Entries.end());
+    Entries[I->second] = I->first;
 
   for (unsigned i = 0, e = Entries.size(); i != e; ++i) {
     // Emit an expression for reference from debug information entries.
-    if (const MCExpr *Expr = Entries[i].second)
+    if (const MCExpr *Expr = Entries[i])
       Asm->OutStreamer.EmitValue(Expr, Asm->getDataLayout().getPointerSize());
     else
       Asm->OutStreamer.EmitIntValue(0, Asm->getDataLayout().getPointerSize());