[Mlir-commits] [mlir] [mlir][OpenMP] Model recursive memory effects of omp.master (PR #230190)

[llvmlistbot at llvm.org]

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@@ -143,3 +143,34 @@ func.func @constant_hoisting_target(%x : !llvm.ptr) {
 // CHECK-NOT: arith.constant
 // CHECK: omp.target
 // CHECK: arith.constant
+
+// -----
+
+// Master has no implicit barrier, so a body without side effects can be removed.
+// CHECK-LABEL: func.func @master_no_side_effects
+// CHECK-NEXT: return
+func.func @master_no_side_effects(%a: i32, %b: i32) {
+  omp.master {
+    %unused = arith.addi %a, %b : i32
+    omp.terminator
+  }
+  return
+}
+
+// -----
+
+// Master must consider recursive side effects.
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JRP-arm wrote:

Done

https://github.com/llvm/llvm-project/pull/230190