commit 6a3229301f7fb38d57554438d0186bfab0a737c1
author Krzysztof Parzyszek <kparzysz@codeaurora.org> Thu Jun 21 13:38:43 2018 +0000
committer Krzysztof Parzyszek <kparzysz@codeaurora.org> Thu Jun 21 13:38:43 2018 +0000
tree 40d3f46507bd60ffec1d17e667153039a44e2287
parent 15745ba5c119f8f53363205ccd6f38c5171e0d5c

[CodeGen] Avoid handling DBG_VALUE in LiveRegUnits::stepBackward

Patch by Jesper Antonsson.

Differential Revision: https://reviews.llvm.org/D48420

llvm-svn: 335233

llvm/lib/CodeGen/LiveRegUnits.cpp

diff --git a/llvm/lib/CodeGen/LiveRegUnits.cpp b/llvm/lib/CodeGen/LiveRegUnits.cpp
index 9f28db6..c226813 100644
--- a/llvm/lib/CodeGen/LiveRegUnits.cpp
+++ b/llvm/lib/CodeGen/LiveRegUnits.cpp
@@ -46,7 +46,7 @@
   // Remove defined registers and regmask kills from the set.
   for (ConstMIBundleOperands O(MI); O.isValid(); ++O) {
     if (O->isReg()) {
-      if (!O->isDef())
+      if (!O->isDef() || O->isDebug())
         continue;
       unsigned Reg = O->getReg();
       if (!TargetRegisterInfo::isPhysicalRegister(Reg))
@@ -58,7 +58,7 @@
 
   // Add uses to the set.
   for (ConstMIBundleOperands O(MI); O.isValid(); ++O) {
-    if (!O->isReg() || !O->readsReg())
+    if (!O->isReg() || !O->readsReg() || O->isDebug())
       continue;
     unsigned Reg = O->getReg();
     if (!TargetRegisterInfo::isPhysicalRegister(Reg))