[PATCH] D23813: AMDGPU/SI: Query AA, if available, in areMemAccessesTriviallyDisjoint()

Phabricator via llvm-commits llvm-commits at lists.llvm.org
Mon Aug 29 05:13:45 PDT 2016

This revision was automatically updated to reflect the committed changes.
Closed by commit rL279963: AMDGPU/SI: Query AA, if available, in areMemAccessesTriviallyDisjoint() (authored by tstellar).

Changed prior to commit:




Index: llvm/trunk/lib/Target/AMDGPU/SIInstrInfo.cpp
--- llvm/trunk/lib/Target/AMDGPU/SIInstrInfo.cpp
+++ llvm/trunk/lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -1350,6 +1350,17 @@
   if (MIa.hasOrderedMemoryRef() || MIb.hasOrderedMemoryRef())
     return false;
+  if (AA && MIa.hasOneMemOperand() && MIb.hasOneMemOperand()) {
+    const MachineMemOperand *MMOa = *MIa.memoperands_begin();
+    const MachineMemOperand *MMOb = *MIb.memoperands_begin();
+    if (MMOa->getValue() && MMOb->getValue()) {
+      MemoryLocation LocA(MMOa->getValue(), MMOa->getSize(), MMOa->getAAInfo());
+      MemoryLocation LocB(MMOb->getValue(), MMOb->getSize(), MMOb->getAAInfo());
+      if (!AA->alias(LocA, LocB))
+        return true;
+    }
+  }
   // TODO: Should we check the address space from the MachineMemOperand? That
   // would allow us to distinguish objects we know don't alias based on the
   // underlying address space, even if it was lowered to a different one,

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