53 lines
2.1 KiB
LLVM
53 lines
2.1 KiB
LLVM
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; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
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; XUN: llc -march=amdgcn -mcpu=fiji -verify-machineinstrs < %s | FileCheck --check-prefixes=GCN,VI %s
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; FIXME: broken on VI because flat instructions need to be emitted
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; instead of addr64 equivalent of the _OFFSET variants.
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; Check that moving the pointer out of the resource descriptor to
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; vaddr works for atomics.
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declare i32 @llvm.amdgcn.workitem.id.x() #1
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; GCN-LABEL: {{^}}atomic_max_i32:
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; GCN: buffer_atomic_smax v{{[0-9]+}}, v{{\[[0-9]+:[0-9]+\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0 addr64 offset:400 glc{{$}}
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define amdgpu_kernel void @atomic_max_i32(i32 addrspace(1)* %out, i32 addrspace(1)* addrspace(1)* %in, i32 addrspace(1)* %x, i32 %y) #0 {
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%tid = call i32 @llvm.amdgcn.workitem.id.x()
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%tid.gep = getelementptr i32 addrspace(1)*, i32 addrspace(1)* addrspace(1)* %in, i32 %tid
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%ptr = load volatile i32 addrspace(1)*, i32 addrspace(1)* addrspace(1)* %tid.gep
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%xor = xor i32 %tid, 1
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%cmp = icmp ne i32 %xor, 0
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br i1 %cmp, label %atomic, label %exit
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atomic:
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%gep = getelementptr i32, i32 addrspace(1)* %ptr, i32 100
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%ret = atomicrmw max i32 addrspace(1)* %gep, i32 %y seq_cst
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store i32 %ret, i32 addrspace(1)* %out
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br label %exit
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exit:
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ret void
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}
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; GCN-LABEL: {{^}}atomic_max_i32_noret:
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; GCN: buffer_atomic_smax v{{[0-9]+}}, v{{\[[0-9]+:[0-9]+\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0 addr64 offset:400{{$}}
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define amdgpu_kernel void @atomic_max_i32_noret(i32 addrspace(1)* %out, i32 addrspace(1)* addrspace(1)* %in, i32 addrspace(1)* %x, i32 %y) #0 {
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%tid = call i32 @llvm.amdgcn.workitem.id.x()
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%tid.gep = getelementptr i32 addrspace(1)*, i32 addrspace(1)* addrspace(1)* %in, i32 %tid
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%ptr = load volatile i32 addrspace(1)*, i32 addrspace(1)* addrspace(1)* %tid.gep
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%xor = xor i32 %tid, 1
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%cmp = icmp ne i32 %xor, 0
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br i1 %cmp, label %atomic, label %exit
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atomic:
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%gep = getelementptr i32, i32 addrspace(1)* %ptr, i32 100
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%ret = atomicrmw max i32 addrspace(1)* %gep, i32 %y seq_cst
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br label %exit
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exit:
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ret void
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}
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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