From: Matthias Braun <matze@braunis.de>
Date: Tue, 1 Dec 2015 04:20:06 +0000 (+0000)
Subject: RegisterPressure: If we do not collect dead defs the list must be empty
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=104db6b94a127e4e68db7528f50d3fcf24d543bd;p=oota-llvm.git

RegisterPressure: If we do not collect dead defs the list must be empty

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254372 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegisterPressure.cpp b/lib/CodeGen/RegisterPressure.cpp
index 18002c8fbd5..8eba0edc8bf 100644
--- a/lib/CodeGen/RegisterPressure.cpp
+++ b/lib/CodeGen/RegisterPressure.cpp
@@ -734,11 +734,7 @@ void RegPressureTracker::bumpUpwardPressure(const MachineInstr *MI) {
   // Account for register pressure similar to RegPressureTracker::recede().
   RegisterOperands RegOpers;
   RegOpers.collect(*MI, *TRI, *MRI, /*IgnoreDead=*/true);
-
-  // Boost max pressure for all dead defs together.
-  // Since CurrSetPressure and MaxSetPressure
-  increaseRegPressure(RegOpers.DeadDefs);
-  decreaseRegPressure(RegOpers.DeadDefs);
+  assert(RegOpers.DeadDefs.size() == 0);
 
   // Kill liveness at live defs.
   for (unsigned i = 0, e = RegOpers.Defs.size(); i < e; ++i) {