R600: Don't mix LDS and non-LDS instructions in the same group

There are a lot of restrictions on instruction groups that contain
LDS instructions, so for now we will be conservative and not packetize
anything else with them.

llvm-svn: 187513

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Target/R600/R600Packetizer.cpp b/llvm/lib/Target/R600/R600Packetizer.cpp
index f4219bd476c..5cf1fd3b665 100644
--- a/llvm/lib/Target/R600/R600Packetizer.cpp
+++ b/llvm/lib/Target/R600/R600Packetizer.cpp
@@ -161,6 +161,10 @@ public:
       return true;
     if (MI->getOpcode() == AMDGPU::GROUP_BARRIER)
       return true;
+    // XXX: This can be removed once the packetizer properly handles all the
+    // LDS instruction group restrictions.
+    if (TII->isLDSInstr(MI->getOpcode()))
+      return true;
     return false;
   }