58 lines
2.6 KiB
LLVM
58 lines
2.6 KiB
LLVM
; RUN: opt -S -mtriple=amdgcn-- -amdgpu-replace-lds-use-with-pointer -amdgpu-enable-lds-replace-with-pointer=true < %s | FileCheck %s
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; DESCRIPTION:
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; There is one lds global defined here, and this lds is used within a single non-kernel
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; function, as an operand of nested constant expression, and this non-kernel function is
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; reachable from kernel. Hence nested constant expression should to be converted into a
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; series of instructons and pointer replacement should take place. But, important note
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; is - only constant expression operands which uses lds should be converted into
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; instructions, other constant expression operands which do not use lds should be left
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; untouched.
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;
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; Original LDS should exist.
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; CHECK: @lds_used_within_function = internal addrspace(3) global [4 x i32] undef, align 4
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@lds_used_within_function = internal addrspace(3) global [4 x i32] undef, align 4
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; Non-LDS global should exist as it is.
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; CHECK: @global_var = internal addrspace(1) global [4 x i32] undef, align 4
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@global_var = internal addrspace(1) global [4 x i32] undef, align 4
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; Pointer should be created.
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; CHECK: @lds_used_within_function.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2
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; Pointer replacement code should be added.
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define internal void @function() {
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; CHECK-LABEL: entry:
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; CHECK: %0 = load i16, ptr addrspace(3) @lds_used_within_function.ptr, align 2
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; CHECK: %1 = getelementptr i8, ptr addrspace(3) null, i16 %0
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; CHECK: %2 = getelementptr inbounds [4 x i32], ptr addrspace(3) %1, i32 0, i32 2
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; CHECK: %3 = addrspacecast ptr addrspace(3) %2 to ptr
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; CHECK: %4 = ptrtoint ptr %3 to i32
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; CHECK: %5 = add i32 %4, ptrtoint (ptr addrspace(1) getelementptr inbounds ([4 x i32], ptr addrspace(1) @global_var, i32 0, i32 2) to i32)
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; CHECK: ret void
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entry:
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%0 = add i32 ptrtoint (ptr addrspacecast (ptr addrspace(3) getelementptr inbounds ([4 x i32], ptr addrspace(3) @lds_used_within_function, i32 0, i32 2) to ptr) to i32), ptrtoint (ptr addrspace(1) getelementptr inbounds ([4 x i32], ptr addrspace(1) @global_var, i32 0, i32 2) to i32)
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ret void
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}
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; Pointer initialization code shoud be added
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define protected amdgpu_kernel void @kernel() {
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; CHECK-LABEL: entry:
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; CHECK: %0 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0)
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; CHECK: %1 = icmp eq i32 %0, 0
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; CHECK: br i1 %1, label %2, label %3
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;
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; CHECK-LABEL: 2:
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; CHECK: store i16 ptrtoint (ptr addrspace(3) @lds_used_within_function to i16), ptr addrspace(3) @lds_used_within_function.ptr, align 2
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; CHECK: br label %3
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;
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; CHECK-LABEL: 3:
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; CHECK: call void @llvm.amdgcn.wave.barrier()
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; CHECK: call void @function()
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; CHECK: ret void
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entry:
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call void @function()
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ret void
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}
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