Index: lib/Target/AMDGPU/SILowerControlFlow.cpp
===================================================================
--- lib/Target/AMDGPU/SILowerControlFlow.cpp
+++ lib/Target/AMDGPU/SILowerControlFlow.cpp
@@ -317,8 +317,10 @@
     }
   } else {
     BuildMI(MBB, &MI, DL, TII->get(AMDGPU::V_CMPX_LE_F32_e32), AMDGPU::VCC)
-           .addImm(0)
-           .addOperand(Op);
+      .addImm(0)
+      .addOperand(Op)
+      .addReg(AMDGPU::EXEC, RegState::Implicit | RegState::Define)
+      .addReg(AMDGPU::EXEC, RegState::Implicit);
   }
 
   MI.eraseFromParent();