R600: Don't try to fix reg class when copying IMPLICIT_DEF to a register

The test case for this is way too complex to be useful as a lit test,
and I was unable to reduce it.

https://bugs.freedesktop.org/show_bug.cgi?id=65438

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183937 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/R600/AMDILISelDAGToDAG.cpp b/lib/Target/R600/AMDILISelDAGToDAG.cpp
index 93432a2c97ad5cf5404295e477fcd490ae0219d0..9a5e9e6147af56d179faec53f2503b5adbc916db 100644 (file)
--- a/lib/Target/R600/AMDILISelDAGToDAG.cpp
+++ b/lib/Target/R600/AMDILISelDAGToDAG.cpp
@@ -766,7 +766,8 @@ void AMDGPUDAGToDAGISel::PostprocessISelDAG() {
         continue;
       }
 
-      if (!Val.getNode()->isMachineOpcode()) {
+      if (!Val.getNode()->isMachineOpcode() ||
+          Val.getNode()->getMachineOpcode() == AMDGPU::IMPLICIT_DEF) {
         continue;
       }