[llvm] r229225 - R600/SI: Add hack to copy from a VGPR to VCC

[Matt Arsenault]

Author: arsenm
Date: Fri Feb 13 20:55:54 2015
New Revision: 229225

URL: http://llvm.org/viewvc/llvm-project?rev=229225&view=rev
Log:
R600/SI: Add hack to copy from a VGPR to VCC

This hopefully should be fixed when VReg_1 is removed.

Modified:
    llvm/trunk/lib/Target/R600/SIInstrInfo.cpp

Modified: llvm/trunk/lib/Target/R600/SIInstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIInstrInfo.cpp?rev=229225&r1=229224&r2=229225&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIInstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/R600/SIInstrInfo.cpp Fri Feb 13 20:55:54 2015
@@ -332,6 +332,16 @@ SIInstrInfo::copyPhysReg(MachineBasicBlo
     return;
 
   } else if (AMDGPU::SReg_64RegClass.contains(DestReg)) {
+    if (DestReg == AMDGPU::VCC) {
+      // FIXME: Hack until VReg_1 removed.
+
+      assert(AMDGPU::VGPR_32RegClass.contains(SrcReg));
+      BuildMI(MBB, MI, DL, get(AMDGPU::V_CMP_NE_I32_e32), AMDGPU::VCC)
+        .addImm(0)
+        .addReg(SrcReg, getKillRegState(KillSrc));
+      return;
+    }
+
     assert(AMDGPU::SReg_64RegClass.contains(SrcReg));
     BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B64), DestReg)
             .addReg(SrcReg, getKillRegState(KillSrc));