AMDGPU: Add disjoint to or produced from lowering vector ops

[arsenm]

No description provided.

[arsenm]

• AMDGPU: Add disjoint to or produced from lowering vector ops #122424 👈 (View in Graphite)
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[llvmbot]

@llvm/pr-subscribers-backend-amdgpu

Author: Matt Arsenault (arsenm)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/122424.diff

1 Files Affected:

• (modified) llvm/lib/Target/AMDGPU/SIISelLowering.cpp (+4-2)

diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index 992f7ed99d3bb7..5a7ff81e08064e 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -7429,7 +7429,8 @@ SDValue SITargetLowering::lowerINSERT_VECTOR_ELT(SDValue Op,
       DAG.getNode(ISD::AND, SL, IntVT, DAG.getNOT(SL, BFM, IntVT), BCVec);
 
   // 4. Get (2) and (3) ORed into the target vector.
-  SDValue BFI = DAG.getNode(ISD::OR, SL, IntVT, LHS, RHS);
+  SDValue BFI =
+      DAG.getNode(ISD::OR, SL, IntVT, LHS, RHS, SDNodeFlags::Disjoint);
 
   return DAG.getNode(ISD::BITCAST, SL, VecVT, BFI);
 }
@@ -7637,7 +7638,8 @@ SDValue SITargetLowering::lowerBUILD_VECTOR(SDValue Op,
     Lo = DAG.getNode(ISD::BITCAST, SL, MVT::i16, Lo);
     Lo = DAG.getNode(ISD::ZERO_EXTEND, SL, MVT::i32, Lo);
 
-    SDValue Or = DAG.getNode(ISD::OR, SL, MVT::i32, Lo, ShlHi);
+    SDValue Or =
+        DAG.getNode(ISD::OR, SL, MVT::i32, Lo, ShlHi, SDNodeFlags::Disjoint);
     return DAG.getNode(ISD::BITCAST, SL, VT, Or);
   }
 

[jayfoad]

Makes sense to me.