derek.holloway
7502bf64a4
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36 lines
2.0 KiB
LLVM
36 lines
2.0 KiB
LLVM
; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -amdgpu-enable-object-linking -passes=amdgpu-lower-exec-sync,amdgpu-lower-module-lds < %s | FileCheck %s
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; Verify that with object linking enabled:
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; 1. AMDGPULowerExecSync externalizes named barriers and emits
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; amdgpu.named_barrier.uses metadata with (barrier, func...) format
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; 2. AMDGPULowerModuleLDS does not handle named barriers at all
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; 3. amdgpu.lds.uses does NOT contain barrier entries
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@bar = internal addrspace(3) global target("amdgcn.named.barrier", 0) poison
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@lds = internal addrspace(3) global [4 x i32] poison, align 4
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; Internal named barrier becomes external with a module-unique hash suffix.
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; CHECK: @[[BAR:__amdgpu_named_barrier\.bar\.[a-f0-9]+]] = external dso_local addrspace(3) global target("amdgcn.named.barrier", 0)
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; CHECK-NOT: !absolute_symbol
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; Regular LDS is packed into the per-function struct (external, for linker).
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; CHECK: @__amdgpu_lds.kernel = external dso_local addrspace(3) global %__amdgpu_lds.kernel.t, align 16
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define amdgpu_kernel void @kernel(i32 %idx) {
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; CHECK-LABEL: define amdgpu_kernel void @kernel(
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; CHECK: call void @llvm.amdgcn.s.barrier.join(ptr addrspace(3) @[[BAR]])
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; CHECK: call void @llvm.amdgcn.s.barrier.signal.var(ptr addrspace(3) @[[BAR]], i32 3)
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call void @llvm.amdgcn.s.barrier.join(ptr addrspace(3) @bar)
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call void @llvm.amdgcn.s.barrier.signal.var(ptr addrspace(3) @bar, i32 3)
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call void @llvm.amdgcn.s.barrier.wait(i16 1)
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%gep = getelementptr [4 x i32], ptr addrspace(3) @lds, i32 0, i32 %idx
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store i32 42, ptr addrspace(3) %gep, align 4
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ret void
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}
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; Named barrier metadata: (barrier_sym, func1, ...) -- emitted by ExecSync.
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; CHECK-DAG: !amdgpu.named_barrier.uses = !{[[BAR_MD:![0-9]+]]}
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; CHECK-DAG: [[BAR_MD]] = !{ptr addrspace(3) @[[BAR]], ptr @kernel}
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; LDS metadata must have exactly one entry (the LDS struct), no barrier entries.
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; CHECK-DAG: !amdgpu.lds.uses = !{[[LDS_MD:![0-9]+]]}
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; CHECK-DAG: [[LDS_MD]] = !{ptr @kernel, ptr addrspace(3) @__amdgpu_lds.kernel}
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