From: Matthias Braun <matze@braunis.de>
Date: Fri, 27 Jan 2017 18:53:07 +0000 (+0000)
Subject: ScheduleDAGInstrs: Do not try to toggle kill flags on debug uses
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0c0aece0793bd08675757c4ce2a1501a83ec64d5;p=llvm

ScheduleDAGInstrs: Do not try to toggle kill flags on debug uses

Preparation for upcoming changes. No testcase as none of the public
targets bundles early enough and has a post machine scheduler enabled at
the same time. The error is also easily catched by asserts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293324 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp
index 520a6ff7563..b5c04497fbb 100644
--- a/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -1159,6 +1159,9 @@ static void toggleBundleKillFlag(MachineInstr *MI, unsigned Reg,
 }
 
 void ScheduleDAGInstrs::toggleKillFlag(MachineInstr &MI, MachineOperand &MO) {
+  if (MO.isDebug())
+    return;
+
   // Setting kill flag...
   if (!MO.isKill()) {
     MO.setIsKill(true);