[llvm-commits] [llvm] r85537 - /llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp

[David Goodwin]

Author: david_goodwin
Date: Thu Oct 29 18:30:59 2009
New Revision: 85537

URL: http://llvm.org/viewvc/llvm-project?rev=85537&view=rev
Log:
Between scheduling regions, correctly maintain anti-dep breaking state so that we don't incorrectly rename registers that span these regions.

Modified:
    llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp

Modified: llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp?rev=85537&r1=85536&r2=85537&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp (original)
+++ llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp Thu Oct 29 18:30:59 2009
@@ -195,8 +195,14 @@
                                      unsigned InsertPosIndex) {
   assert(Count < InsertPosIndex && "Instruction index out of expected range!");
 
+  std::set<unsigned> PassthruRegs;
+  GetPassthruRegs(MI, PassthruRegs);
+  PrescanInstruction(MI, Count, PassthruRegs);
+  ScanInstruction(MI, Count);
+
   DEBUG(errs() << "Observe: ");
   DEBUG(MI->dump());
+  DEBUG(errs() << "\tRegs:");
 
   unsigned *DefIndices = State->GetDefIndices();
   for (unsigned Reg = 0; Reg != TargetRegisterInfo::FirstVirtualRegister; ++Reg) {
@@ -215,11 +221,7 @@
       DefIndices[Reg] = Count;
     }
   }
-
-  std::set<unsigned> PassthruRegs;
-  GetPassthruRegs(MI, PassthruRegs);
-  PrescanInstruction(MI, Count, PassthruRegs);
-  ScanInstruction(MI, Count);
+  DEBUG(errs() << '\n');
 
   // We're starting a new schedule region so forget any saved state.
   delete SavedState;