derek.holloway
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46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s | FileCheck %s
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; Tests that the LDS lowering pass handles indirect references to LDS GVs; i.e.
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; that it lowers to accesses into the generated LDS struct if these references
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; are deep in the call graph starting at the kernel.
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@lds_item_to_indirectly_load = internal addrspace(3) global ptr poison, align 8
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%store_type = type { i32, ptr }
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@place_to_store_indirect_caller = internal addrspace(3) global %store_type poison, align 8
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define amdgpu_kernel void @offloading_kernel() {
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store ptr @indirectly_load_lds, ptr addrspace(3) getelementptr inbounds nuw (i8, ptr addrspace(3) @place_to_store_indirect_caller, i32 0), align 8
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call void @call_unknown()
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ret void
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}
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define void @call_unknown() {
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%alloca = alloca ptr, align 8, addrspace(5)
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%alloca.cast = addrspacecast ptr addrspace(5) %alloca to ptr
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%ret = call i32 %alloca.cast()
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ret void
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}
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define void @indirectly_load_lds() {
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call void @directly_load_lds()
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ret void
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}
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define void @directly_load_lds() {
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%2 = load ptr, ptr addrspace(3) @lds_item_to_indirectly_load, align 8
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ret void
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}
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; CHECK: %[[LDS_STRUCT_TY:.*]] = type { %store_type, ptr }
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; CHECK: @[[LDS_STRUCT:.*]] = {{.*}} %[[LDS_STRUCT_TY]] {{.*}} !absolute_symbol
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; CHECK: define amdgpu_kernel void @offloading_kernel() {{.*}} {
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; CHECK: store ptr @indirectly_load_lds, {{.*}} @[[LDS_STRUCT]]
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; CHECK: call void @call_unknown()
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; CHECK: }
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; CHECK: define void @directly_load_lds() {
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; CHECK: load ptr, {{.*}} (%[[LDS_STRUCT_TY]], {{.*}} @[[LDS_STRUCT]], i32 0, i32 1)
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; CHECK: }
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