commit 42259cf35e0dbc7c174fa655d6e55e5178ac2087
author Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> Fri Feb 24 21:56:16 2017 +0000
committer Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> Fri Feb 24 21:56:16 2017 +0000
tree 5ed008ece438709d525a589f68e68573cf2a047b
parent 588e41586e157b0f8bd6b37f03b08a45ee337a8d

Revert "Correct register pressure calculation in presence of subregs"

This reverts commit r296009. It broke one out of tree target and also
does not account for all partial lines added or removed when calculating
PressureDiff.

llvm-svn: 296182

llvm/lib/CodeGen/MachineScheduler.cpp

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 0663983..79b02c7 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -1085,7 +1085,7 @@
           continue;
 
         PressureDiff &PDiff = getPressureDiff(&SU);
-        PDiff.addPressureChange(P, Decrement, &MRI);
+        PDiff.addPressureChange(Reg, Decrement, &MRI);
         DEBUG(
           dbgs() << "  UpdateRegP: SU(" << SU.NodeNum << ") "
                  << PrintReg(Reg, TRI) << ':' << PrintLaneMask(P.LaneMask)
@@ -1123,7 +1123,7 @@
               LI.Query(LIS->getInstructionIndex(*SU->getInstr()));
           if (LRQ.valueIn() == VNI) {
             PressureDiff &PDiff = getPressureDiff(SU);
-            PDiff.addPressureChange(P, true, &MRI);
+            PDiff.addPressureChange(Reg, true, &MRI);
             DEBUG(
               dbgs() << "  UpdateRegP: SU(" << SU->NodeNum << ") "
                      << *SU->getInstr();