1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
index 6ee529c8549..2cc48a7f9f2 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
@@ -323,6 +323,14 @@ public:
     return HasMadMixInsts;
   }
 
+  bool hasSBufferLoadStoreAtomicDwordxN() const {
+    // Only use the "x1" variants on GFX9 or don't use the buffer variants.
+    // For x2 and higher variants, if the accessed region spans 2 VM pages and
+    // the second page is unmapped, the hw hangs.
+    // TODO: There is one future GFX9 chip that doesn't have this bug.
+    return getGeneration() != GFX9;
+  }
+
   bool hasCARRY() const {
     return (getGeneration() >= EVERGREEN);
   }