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50 lines
2.3 KiB
MLIR
50 lines
2.3 KiB
MLIR
// RUN: mlir-translate -mlir-to-llvmir %s | FileCheck %s
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// Tests `target ... nowait` when code gen targets the host rather than a
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// device.
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module attributes {omp.is_target_device = false} {
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llvm.func @omp_target_nowait_() {
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%0 = llvm.mlir.constant(1 : i64) : i64
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%1 = llvm.alloca %0 x f32 {bindc_name = "x"} : (i64) -> !llvm.ptr
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%3 = omp.map.info var_ptr(%1 : !llvm.ptr, f32) map_clauses(tofrom) capture(ByRef) -> !llvm.ptr {name = "x"}
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omp.target nowait map_entries(%3 -> %arg0 : !llvm.ptr) {
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%4 = llvm.mlir.constant(5.000000e+00 : f32) : f32
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llvm.store %4, %arg0 : f32, !llvm.ptr
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omp.terminator
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}
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llvm.return
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}
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}
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// CHECK: define void @omp_target_nowait_()
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// CHECK-NOT: define {{.*}} @
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// CHECK-NOT: call ptr @__kmpc_omp_target_task_alloc({{.*}})
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// CHECK: call void @__kmpc_omp_task_begin_if0
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// CHECK-NEXT: call void @.omp_target_task_proxy_func
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// CHECK: call void @__kmpc_omp_task_complete_if0
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// https://github.com/llvm/llvm-project/issues/126949 exposes two issues
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// 1. Empty target task proxy functions
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// 2. When 1 fixed, it leads to a second problem of calling the omp target kernel twice
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// Once via the target task proxy function and a second time after the target task is done.
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// The following checks check problem #2.
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// functions. The following checks tests the fix for this issue.
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// CHECK-NEXT: br label %[[BLOCK_AFTER_OUTLINED_TARGET_TASK_BODY:.*]]
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// CHECK:[[BLOCK_AFTER_OUTLINED_TARGET_TASK_BODY]]:
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// CHECK-NEXT: ret void
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// Verify that we directly emit a call to the "target" region's body from the
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// parent function of the the `omp.target` op.
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// CHECK: define internal void @omp_target_nowait_..omp_par
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// CHECK: call void @__omp_offloading_[[DEV:.*]]_[[FIL:.*]]_omp_target_nowait__l[[LINE:.*]](ptr {{.*}}, ptr null)
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// CHECK-NEXT: br label %[[BLOCK_AFTER_TARGET_TASK_BODY:.*]]
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// CHECK: [[BLOCK_AFTER_TARGET_TASK_BODY]]:
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// CHECK-NEXT: ret void
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// CHECK: define internal void @__omp_offloading_[[DEV]]_[[FIL]]_omp_target_nowait__l[[LINE]](ptr %[[ADDR_X:.*]], ptr %{{.*}})
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// CHECK: store float 5{{.*}}, ptr %[[ADDR_X]], align 4
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// The following check test for the fix of problem #1 as described in https://github.com/llvm/llvm-project/issues/126949
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// CHECK: define internal void @.omp_target_task_proxy_func
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// CHECK: call void @omp_target_nowait_..omp_par
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