[llvm] [AMDGPU][SDAG] Initial support for ISD::PTRADD (PR #141725)

[Matt Arsenault via llvm-commits]

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@@ -1376,6 +1376,37 @@ def : GCNPat <
       (i32 (V_MOV_B32_e32 (i32 0))), sub1)
 >;
 
+//===----------------------------------------------------------------------===//
+// PTRADD Patterns
+//===----------------------------------------------------------------------===//
+
+def : GCNPat<
+  (DivergentBinFrag<ptradd> i64:$src0, i64:$src1),
+  (V_ADD_U64_PSEUDO $src0, $src1)>;
+
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arsenm wrote:

Maybe should set GISelShouldIgnore on the 64-bit cases, the pseudos are mostly a SelectionDAG hack

https://github.com/llvm/llvm-project/pull/141725