derek.holloway
7502bf64a4
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71 lines
3.0 KiB
LLVM
71 lines
3.0 KiB
LLVM
; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -passes=amdgpu-lower-module-lds -amdgpu-enable-object-linking < %s | FileCheck %s
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; Test the three-way classification of LDS variables:
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; 1. Global-scope (external linkage): standalone external declaration
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; 2. Kernel-scope (internal linkage, single kernel user): wrapped in per-kernel struct
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; 3. Callee-scope (internal linkage, single callee user): wrapped in per-callee struct
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;
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; Also tests that a global-scope variable used by multiple functions produces
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; one metadata entry per (function, variable) pair.
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; Global-scope: external linkage, used by both func and my_kernel.
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@lds_global = addrspace(3) global [64 x i32] poison, align 16
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; Callee-scope: internal linkage, used only by func.
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@lds_func_priv = internal addrspace(3) global [32 x float] poison, align 4
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; Kernel-scope: internal linkage, used only by my_kernel.
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@lds_kernel_priv = internal addrspace(3) global [16 x i64] poison, align 8
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declare void @extern_func()
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; Global-scope: remains as external declaration.
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; CHECK-DAG: @lds_global = external addrspace(3) global [64 x i32]
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; Callee-scope: wrapped into per-function struct.
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; CHECK-DAG: @__amdgpu_lds.func = external {{(dso_local )?}}addrspace(3) global %__amdgpu_lds.func.t
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; Kernel-scope: wrapped into per-kernel struct.
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; CHECK-DAG: @__amdgpu_lds.my_kernel = external {{(dso_local )?}}addrspace(3) global %__amdgpu_lds.my_kernel.t
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; Original internal-linkage variables should be removed.
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; CHECK-NOT: @lds_func_priv
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; CHECK-NOT: @lds_kernel_priv
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; func: uses lds_global directly, uses lds_func_priv via struct GEP.
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; CHECK-LABEL: define void @func()
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; CHECK: getelementptr {{.*}} ptr addrspace(3) @lds_global
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; CHECK: getelementptr {{.*}} ptr addrspace(3) @__amdgpu_lds.func
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; my_kernel: uses lds_global directly, uses lds_kernel_priv via struct GEP.
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; CHECK-LABEL: define amdgpu_kernel void @my_kernel()
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; CHECK: getelementptr {{.*}} ptr addrspace(3) @lds_global
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; CHECK: getelementptr {{.*}} ptr addrspace(3) @__amdgpu_lds.my_kernel
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; Metadata:
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; CHECK: !amdgpu.lds.uses = !{{{![0-9]+, ![0-9]+, ![0-9]+, ![0-9]+}}}
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; Function-scope entries (one per struct).
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; CHECK-DAG: !{ptr @my_kernel, ptr addrspace(3) @__amdgpu_lds.my_kernel}
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; CHECK-DAG: !{ptr @func, ptr addrspace(3) @__amdgpu_lds.func}
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; Global-scope entries (one per using function).
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; CHECK-DAG: !{ptr @my_kernel, ptr addrspace(3) @lds_global}
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; CHECK-DAG: !{ptr @func, ptr addrspace(3) @lds_global}
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define void @func() {
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%gep1 = getelementptr [64 x i32], ptr addrspace(3) @lds_global, i32 0, i32 0
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store i32 1, ptr addrspace(3) %gep1
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%gep2 = getelementptr [32 x float], ptr addrspace(3) @lds_func_priv, i32 0, i32 0
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store float 2.0, ptr addrspace(3) %gep2
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call void @extern_func()
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ret void
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}
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define amdgpu_kernel void @my_kernel() {
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%gep1 = getelementptr [64 x i32], ptr addrspace(3) @lds_global, i32 0, i32 0
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store i32 3, ptr addrspace(3) %gep1
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%gep2 = getelementptr [16 x i64], ptr addrspace(3) @lds_kernel_priv, i32 0, i32 0
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store i64 4, ptr addrspace(3) %gep2
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call void @func()
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ret void
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}
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