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68 lines
3.4 KiB
LLVM
68 lines
3.4 KiB
LLVM
; 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, var2 would be transformed were they used from a non-kernel function
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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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; External and constant are both left to the optimizer / error diagnostics
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; CHECK: @extern = external addrspace(3) global i32
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@extern = external addrspace(3) global i32
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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 float addrspace(3)* bitcast (float addrspace(3)* addrspace(3)* @toself to float addrspace(3)*), align 8
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@toself = addrspace(3) global float addrspace(3)* bitcast (float addrspace(3)* addrspace(3)* @toself to float addrspace(3)*), 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 i8*] [i8* addrspacecast (i8 addrspace(3)* bitcast (i32 addrspace(3)* @var1 to i8 addrspace(3)*) to i8*)], section "llvm.metadata"
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; CHECK: @llvm.compiler.used = appending global [1 x i8*] [i8* addrspacecast (i8 addrspace(3)* bitcast (float addrspace(3)* @var2 to i8 addrspace(3)*) to i8*)], section "llvm.metadata"
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@llvm.compiler.used = appending global [1 x i8*] [i8* addrspacecast (i8 addrspace(3)* bitcast (float addrspace(3)* @var2 to i8 addrspace(3)*) to i8*)], 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, i32 addrspace(3)* @const_undef, align 4
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; CHECK: %c1 = load i64, i64 addrspace(3)* @const_with_init, align 4
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; CHECK: %v0 = atomicrmw add i64 addrspace(3)* @with_init, i64 1 seq_cst
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; CHECK: %v1 = cmpxchg i32 addrspace(3)* @extern, i32 4, i32 %c0 acq_rel monotonic
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; CHECK: %v2 = atomicrmw add i64 addrspace(4)* @addr4, i64 %c1 monotonic
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define void @use_variables() {
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%c0 = load i32, i32 addrspace(3)* @const_undef, align 4
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%c1 = load i64, i64 addrspace(3)* @const_with_init, align 4
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%v0 = atomicrmw add i64 addrspace(3)* @with_init, i64 1 seq_cst
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%v1 = cmpxchg i32 addrspace(3)* @extern, i32 4, i32 %c0 acq_rel monotonic
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%v2 = atomicrmw add i64 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 i32 addrspace(3)* getelementptr inbounds (%llvm.amdgcn.kernel.kern_use.lds.t, %llvm.amdgcn.kernel.kern_use.lds.t addrspace(3)* @llvm.amdgcn.kernel.kern_use.lds, i32 0, i32 0), i32 1 monotonic, align 4
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define amdgpu_kernel void @kern_use() {
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%inc = atomicrmw add i32 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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