[Mlir-commits] [mlir] [MLIR][OpenMP] Skip host omp ops when compiling for the target device (PR #85239)

[Sergio Afonso]

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@@ -0,0 +1,41 @@
+// RUN: mlir-translate -mlir-to-llvmir %s | FileCheck %s
+
+module attributes {omp.is_target_device = true, omp.is_gpu = true} {
+  llvm.func @omp_target_region_() {
+    %0 = llvm.mlir.constant(20 : i32) : i32
+    %1 = llvm.mlir.constant(10 : i32) : i32
+    %2 = llvm.mlir.constant(1 : i64) : i64
+    %3 = llvm.alloca %2 x i32 {bindc_name = "a", in_type = i32, operandSegmentSizes = array<i32: 0, 0>, uniq_name = "_QFomp_target_regionEa"} : (i64) -> !llvm.ptr
+    %4 = llvm.mlir.constant(1 : i64) : i64
+    %5 = llvm.alloca %4 x i32 {bindc_name = "b", in_type = i32, operandSegmentSizes = array<i32: 0, 0>, uniq_name = "_QFomp_target_regionEb"} : (i64) -> !llvm.ptr
+    %6 = llvm.mlir.constant(1 : i64) : i64
+    %7 = llvm.alloca %6 x i32 {bindc_name = "c", in_type = i32, operandSegmentSizes = array<i32: 0, 0>, uniq_name = "_QFomp_target_regionEc"} : (i64) -> !llvm.ptr
+    llvm.store %1, %3 : i32, !llvm.ptr
+    llvm.store %0, %5 : i32, !llvm.ptr
+    %map1 = omp.map_info var_ptr(%3 : !llvm.ptr, i32)   map_clauses(tofrom) capture(ByRef) -> !llvm.ptr {name = ""}
+    %map2 = omp.map_info var_ptr(%5 : !llvm.ptr, i32)   map_clauses(tofrom) capture(ByRef) -> !llvm.ptr {name = ""}
+    %map3 = omp.map_info var_ptr(%7 : !llvm.ptr, i32)   map_clauses(tofrom) capture(ByRef) -> !llvm.ptr {name = ""}
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skatrak wrote:

Can you move these inside of `omp.task`? Just to make sure that what Flang would produce for something like the example below would be accepted:
```fortran
!$omp task
  !$omp target map(...)
    ...
  !$omp end target
!$omp end task
```

https://github.com/llvm/llvm-project/pull/85239