62 lines
2.7 KiB
LLVM
62 lines
2.7 KiB
LLVM
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; RUN: opt -S -mtriple=amdgcn-- -amdgpu-lower-module-lds < %s | FileCheck %s
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; RUN: opt -S -mtriple=amdgcn-- -passes=amdgpu-lower-module-lds < %s | FileCheck %s
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; Variables that are not lowered by this pass are left unchanged
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; CHECK-NOT: asm
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; CHECK-NOT: llvm.amdgcn.module.lds
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; CHECK-NOT: llvm.amdgcn.module.lds.t
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; var1 is removed, var2 stays because it's in compiler.used
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; CHECK-NOT: @var1
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; CHECK: @var2 = addrspace(3) global float undef
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@var1 = addrspace(3) global i32 undef
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@var2 = addrspace(3) global float undef
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; constant variables are left to the optimizer / error diagnostics
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; CHECK: @const_undef = addrspace(3) constant i32 undef
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; CHECK: @const_with_init = addrspace(3) constant i64 8
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@const_undef = addrspace(3) constant i32 undef
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@const_with_init = addrspace(3) constant i64 8
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; Use of an addrspace(3) variable with an initializer is skipped,
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; so as to preserve the unimplemented error from llc
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; CHECK: @with_init = addrspace(3) global i64 0
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@with_init = addrspace(3) global i64 0
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; Only local addrspace variables are transformed
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; CHECK: @addr4 = addrspace(4) global i64 undef
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@addr4 = addrspace(4) global i64 undef
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; Assign to self is treated as any other initializer, i.e. ignored by this pass
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; CHECK: @toself = addrspace(3) global ptr addrspace(3) @toself, align 8
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@toself = addrspace(3) global ptr addrspace(3) @toself, align 8
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; Use by .used lists doesn't trigger lowering
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; CHECK-NOT: @llvm.used =
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@llvm.used = appending global [1 x ptr] [ptr addrspacecast (ptr addrspace(3) @var1 to ptr)], section "llvm.metadata"
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; CHECK: @llvm.compiler.used = appending global [1 x ptr] [ptr addrspacecast (ptr addrspace(3) @var2 to ptr)], section "llvm.metadata"
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@llvm.compiler.used = appending global [1 x ptr] [ptr addrspacecast (ptr addrspace(3) @var2 to ptr)], section "llvm.metadata"
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; Access from a function would cause lowering for non-excluded cases
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; CHECK-LABEL: @use_variables()
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; CHECK: %c0 = load i32, ptr addrspace(3) @const_undef, align 4
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; CHECK: %c1 = load i64, ptr addrspace(3) @const_with_init, align 4
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; CHECK: %v0 = atomicrmw add ptr addrspace(3) @with_init, i64 1 seq_cst
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; CHECK: %v1 = atomicrmw add ptr addrspace(4) @addr4, i64 %c1 monotonic
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define void @use_variables() {
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%c0 = load i32, ptr addrspace(3) @const_undef, align 4
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%c1 = load i64, ptr addrspace(3) @const_with_init, align 4
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%v0 = atomicrmw add ptr addrspace(3) @with_init, i64 1 seq_cst
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%v1 = atomicrmw add ptr addrspace(4) @addr4, i64 %c1 monotonic
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ret void
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}
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; CHECK-LABEL: @kern_use()
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; CHECK: %inc = atomicrmw add ptr addrspace(3) @llvm.amdgcn.kernel.kern_use.lds, i32 1 monotonic, align 4
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define amdgpu_kernel void @kern_use() {
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%inc = atomicrmw add ptr addrspace(3) @var1, i32 1 monotonic
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call void @use_variables()
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ret void
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}
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