[llvm] r303949 - LivePhysRegs: Follow-up to r303937

[Matthias Braun via llvm-commits]

Author: matze
Date: Thu May 25 19:54:24 2017
New Revision: 303949

URL: http://llvm.org/viewvc/llvm-project?rev=303949&view=rev
Log:
LivePhysRegs: Follow-up to r303937

We may have situations in which a superregister is reserved and not
added to liveins, so we have to add the subregisters.

Modified:
    llvm/trunk/lib/CodeGen/LivePhysRegs.cpp

Modified: llvm/trunk/lib/CodeGen/LivePhysRegs.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LivePhysRegs.cpp?rev=303949&r1=303948&r2=303949&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LivePhysRegs.cpp (original)
+++ llvm/trunk/lib/CodeGen/LivePhysRegs.cpp Thu May 25 19:54:24 2017
@@ -230,7 +230,7 @@ void llvm::computeLiveIns(LivePhysRegs &
     // Skip the register if we are about to add one of its super registers.
     bool ContainsSuperReg = false;
     for (MCSuperRegIterator SReg(Reg, &TRI); SReg.isValid(); ++SReg) {
-      if (LiveRegs.contains(*SReg)) {
+      if (LiveRegs.contains(*SReg) && !MRI.isReserved(*SReg)) {
         ContainsSuperReg = true;
         break;
       }