derek.holloway
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36 lines
1.3 KiB
LLVM
36 lines
1.3 KiB
LLVM
; RUN: llc -mtriple=amdgcn--amdhsa < %s | FileCheck -check-prefix=GCN %s
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; If the workgroup id range is restricted, we should be able to use
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; mad24 for the usual indexing pattern.
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declare i32 @llvm.amdgcn.workgroup.id.x() #0
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declare i32 @llvm.amdgcn.workitem.id.x() #0
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declare ptr addrspace(4) @llvm.amdgcn.dispatch.ptr() #0
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; GCN-LABEL: {{^}}get_global_id_0:
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; GCN: s_and_b32 [[WGSIZEX:s[0-9]+]], {{s[0-9]+}}, 0xffff
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; GCN: s_mul_i32 [[MUL:s[0-9]+]], s14, [[WGSIZEX]]
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; GCN: v_add_i32_e32 v{{[0-9]+}}, vcc, [[MUL]], v0
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define amdgpu_kernel void @get_global_id_0(ptr addrspace(1) %out) #1 {
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%dispatch.ptr = call ptr addrspace(4) @llvm.amdgcn.dispatch.ptr()
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%gep = getelementptr inbounds i32, ptr addrspace(4) %dispatch.ptr, i64 1
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%workgroup.size.xy = load i32, ptr addrspace(4) %gep, align 4, !invariant.load !0
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%workgroup.size.x = and i32 %workgroup.size.xy, 65535
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%workitem.id.x = call i32 @llvm.amdgcn.workitem.id.x(), !range !1
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%workgroup.id.x = call i32 @llvm.amdgcn.workgroup.id.x(), !range !2
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%mul = mul i32 %workgroup.id.x, %workgroup.size.x
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%add = add i32 %mul, %workitem.id.x
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store i32 %add, ptr addrspace(1) %out, align 4
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ret void
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}
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind }
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!0 = !{}
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!1 = !{i32 0, i32 1024}
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!2 = !{i32 0, i32 16777216}
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