derek.holloway
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98 lines
3.8 KiB
LLVM
98 lines
3.8 KiB
LLVM
; RUN: opt -passes=amdgpu-attributor < %s | llc | FileCheck %s
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target triple = "amdgcn-amd-amdhsa"
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; The call to intrinsic implicitarg_ptr reaches a load through a phi. The
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; offsets of the phi cannot be determined, and hence the attirbutor assumes that
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; hostcall is in use.
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; CHECK-LABEL: amdhsa.kernels:
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; CHECK: .value_kind: hidden_hostcall_buffer
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; CHECK: .value_kind: hidden_multigrid_sync_arg
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; CHECK-LABEL: .name: kernel_1
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define amdgpu_kernel void @kernel_1(ptr addrspace(1) %a, i64 %index1, i64 %index2, i1 %cond) {
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entry:
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%tmp7 = tail call ptr addrspace(4) @llvm.amdgcn.implicitarg.ptr()
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br i1 %cond, label %old, label %new
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old: ; preds = %entry
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%tmp4 = getelementptr i8, ptr addrspace(4) %tmp7, i64 %index1
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br label %join
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new: ; preds = %entry
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%tmp12 = getelementptr inbounds i8, ptr addrspace(4) %tmp7, i64 %index2
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br label %join
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join: ; preds = %new, %old
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%.in.in.in = phi ptr addrspace(4) [ %tmp12, %new ], [ %tmp4, %old ]
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;;; THIS USE is where the offset into implicitarg_ptr is unknown
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%.in = load i16, ptr addrspace(4) %.in.in.in, align 2
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%idx.ext = sext i16 %.in to i64
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%add.ptr3 = getelementptr inbounds i32, ptr addrspace(1) %a, i64 %idx.ext
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%tmp16 = atomicrmw add ptr addrspace(1) %add.ptr3, i32 15 syncscope("agent-one-as") monotonic, align 4
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ret void
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}
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; The call to intrinsic implicitarg_ptr is combined with an offset produced by
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; select'ing between two constants, before it is eventually used in a GEP to
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; form the address of a load. This test ensures that AAPointerInfo can look
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; through the select to maintain a set of indices, so that it can precisely
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; determine that hostcall and other expensive implicit args are not in use.
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; CHECK-NOT: hidden_hostcall_buffer
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; CHECK-NOT: hidden_multigrid_sync_arg
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; CHECK-LABEL: .name: kernel_2
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define amdgpu_kernel void @kernel_2(ptr addrspace(1) %a, i1 %cond) {
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entry:
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%tmp7 = tail call ptr addrspace(4) @llvm.amdgcn.implicitarg.ptr()
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%tmp5 = select i1 %cond, i64 12, i64 18
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%tmp6 = getelementptr inbounds i8, ptr addrspace(4) %tmp7, i64 %tmp5
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;;; THIS USE is where multiple offsets are possible, relative to implicitarg_ptr
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%tmp9 = load i16, ptr addrspace(4) %tmp6, align 2
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%idx.ext = sext i16 %tmp9 to i64
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%add.ptr3 = getelementptr inbounds i32, ptr addrspace(1) %a, i64 %idx.ext
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%tmp16 = atomicrmw add ptr addrspace(1) %add.ptr3, i32 15 syncscope("agent-one-as") monotonic, align 4
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ret void
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}
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; CHECK-NOT: hidden_hostcall_buffer
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; CHECK-NOT: hidden_multigrid_sync_arg
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; CHECK-LABEL: .name: kernel_3
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define amdgpu_kernel void @kernel_3(ptr addrspace(1) %a, i1 %cond) {
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entry:
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%tmp7 = tail call ptr addrspace(4) @llvm.amdgcn.implicitarg.ptr()
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br i1 %cond, label %old, label %new
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old: ; preds = %entry
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%tmp4 = getelementptr i8, ptr addrspace(4) %tmp7, i64 12
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br label %join
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new: ; preds = %entry
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%tmp12 = getelementptr inbounds i8, ptr addrspace(4) %tmp7, i64 18
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br label %join
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join: ; preds = %new, %old
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%.in.in.in = phi ptr addrspace(4) [ %tmp12, %new ], [ %tmp4, %old ]
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;;; THIS USE of implicitarg_ptr should not produce hostcall metadata
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%.in = load i16, ptr addrspace(4) %.in.in.in, align 2
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%idx.ext = sext i16 %.in to i64
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%add.ptr3 = getelementptr inbounds i32, ptr addrspace(1) %a, i64 %idx.ext
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%tmp16 = atomicrmw add ptr addrspace(1) %add.ptr3, i32 15 syncscope("agent-one-as") monotonic, align 4
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ret void
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}
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declare i32 @llvm.amdgcn.workitem.id.x()
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declare align 4 ptr addrspace(4) @llvm.amdgcn.implicitarg.ptr()
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declare i32 @llvm.amdgcn.workgroup.id.x()
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