From: Matthias Braun <matze@braunis.de>
Date: Tue, 3 Nov 2015 01:53:36 +0000 (+0000)
Subject: RegisterPressure: Improve assert message
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cfe39babc57373ca5fb8c21a0d5de68f5ce277aa;p=oota-llvm.git

RegisterPressure: Improve assert message

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251885 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegisterPressure.cpp b/lib/CodeGen/RegisterPressure.cpp
index 57dde2f2e2d..6ff16e551be 100644
--- a/lib/CodeGen/RegisterPressure.cpp
+++ b/lib/CodeGen/RegisterPressure.cpp
@@ -862,7 +862,8 @@ getUpwardPressureDelta(const MachineInstr *MI, /*const*/ PressureDiff &PDiff,
     unsigned MNew = MOld;
     // Ignore DeadDefs here because they aren't captured by PressureChange.
     unsigned PNew = POld + PDiffI->getUnitInc();
-    assert((PDiffI->getUnitInc() >= 0) == (PNew >= POld) && "PSet overflow");
+    assert((PDiffI->getUnitInc() >= 0) == (PNew >= POld)
+           && "PSet overflow/underflow");
     if (PNew > MOld)
       MNew = PNew;
     // Check if current pressure has exceeded the limit.