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Also count identity copies.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130996 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-05-06 17:59:57 +00:00
parent e38c61597e
commit cf5e5f3cc0
1 changed files with 2 additions and 0 deletions
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2
lib/CodeGen/VirtRegMap.cpp
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@@ -42,6 +42,7 @@
using namespace llvm; using namespace llvm;
STATISTIC(NumSpills , "Number of register spills"); STATISTIC(NumSpills , "Number of register spills");
STATISTIC(NumIdCopies, "Number of identity moves eliminated after rewriting");
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// VirtRegMap implementation // VirtRegMap implementation
@@ -318,6 +319,7 @@ void VirtRegMap::rewrite(SlotIndexes *Indexes) {
// Finally, remove any identity copies. // Finally, remove any identity copies.
if (MI->isIdentityCopy()) { if (MI->isIdentityCopy()) {
++NumIdCopies;
if (MI->getNumOperands() == 2) { if (MI->getNumOperands() == 2) {
DEBUG(dbgs() << "Deleting identity copy.\n"); DEBUG(dbgs() << "Deleting identity copy.\n");
RemoveMachineInstrFromMaps(MI); RemoveMachineInstrFromMaps(MI);