derek.holloway
7502bf64a4
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19 lines
763 B
MLIR
19 lines
763 B
MLIR
// RUN: mlir-opt %s -pass-pipeline='builtin.module(func.func(cse))' | FileCheck %s
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// Verify that acc.set (which writes CurrentDeviceIdResource, a root disjoint
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// from DefaultResource) does not block CSE of identical memref.load operations
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// (which read DefaultResource). The two resources are disjoint, so the write
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// cannot conflict with the loads.
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// CHECK-LABEL: @cse_across_acc_set
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func.func @cse_across_acc_set(%a: memref<10xf32>, %i: index) -> (f32, f32) {
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%v1 = memref.load %a[%i] : memref<10xf32>
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%c42 = arith.constant 42 : i32
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acc.set device_num(%c42 : i32)
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%v2 = memref.load %a[%i] : memref<10xf32>
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// CHECK: %[[V:.*]] = memref.load
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// CHECK-NOT: memref.load
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// CHECK: return %[[V]], %[[V]] : f32, f32
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return %v1, %v2 : f32, f32
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}
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