derek.holloway
7502bf64a4
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82 lines
3.1 KiB
LLVM
82 lines
3.1 KiB
LLVM
; RUN: llc -o - %s -mtriple=nvptx -mcpu=sm_20 | FileCheck %s
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; Check that we do global variable demotion when the symbols don't need to be
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; shared across modules or functions.
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; Variable visible globally can't be demoted.
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; CHECK: .visible .shared .align 4 .u64 external_global
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@external_global = addrspace(3) global i64 undef, align 4
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; Not externally visible global used in only one function => demote.
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; It should live in @define_internal_global.
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@internal_global = internal addrspace(3) global i64 undef, align 4
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; Not externally visible global used in several functions => keep.
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; CHECK: .shared .align 4 .u64 internal_global_used_in_different_fcts
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@internal_global_used_in_different_fcts = internal addrspace(3) global i64 undef, align 4
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; Not externally visible global used in only one function => demote.
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; It should live in @define_private_global.
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@private_global = private addrspace(3) global i64 undef, align 4
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; Not externally visible global used in only one function
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; (but with several uses) => demote.
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; It should live in @define_private_global_more_than_one_use.
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@private_global_used_more_than_once_in_same_fct = private addrspace(3) global i64 undef, align 4
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; CHECK-LABEL: define_external_global(
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define void @define_external_global(i64 %val) {
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store i64 %val, ptr addrspace(3) @external_global
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ret void
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}
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; CHECK-LABEL: define_internal_global(
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; Demoted `internal_global` should live here.
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; CHECK: .shared .align 4 .u64 internal_global
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define void @define_internal_global(i64 %val) {
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store i64 %val, ptr addrspace(3) @internal_global
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ret void
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}
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; CHECK-LABEL: define_internal_global_with_different_fct1(
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; CHECK-NOT: .shared .align 4 .u64 internal_global_used_in_different_fcts
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define void @define_internal_global_with_different_fct1(i64 %val) {
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store i64 %val, ptr addrspace(3) @internal_global_used_in_different_fcts
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ret void
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}
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; CHECK-LABEL: define_internal_global_with_different_fct2(
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; CHECK-NOT: .shared .align 4 .u64 internal_global_used_in_different_fcts
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define void @define_internal_global_with_different_fct2(i64 %val) {
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store i64 %val, ptr addrspace(3) @internal_global_used_in_different_fcts
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ret void
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}
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; CHECK-LABEL: define_private_global(
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; Demoted `private_global` should live here.
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; CHECK: .shared .align 4 .u64 private_global
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define void @define_private_global(i64 %val) {
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store i64 %val, ptr addrspace(3) @private_global
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ret void
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}
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; CHECK-LABEL: define_private_global_more_than_one_use(
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; Demoted `private_global_used_more_than_once_in_same_fct` should live here.
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; CHECK: .shared .align 4 .u64 private_global_used_more_than_once_in_same_fct
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;
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; Also check that the if-then is still here, otherwise we may not be testing
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; the "more-than-one-use" part.
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; CHECK: st.shared.b64 [private_global_used_more_than_once_in_same_fct],
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; CHECK: st.shared.b64 [private_global_used_more_than_once_in_same_fct], 25
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define void @define_private_global_more_than_one_use(i64 %val, i1 %cond) {
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store i64 %val, ptr addrspace(3) @private_global_used_more_than_once_in_same_fct
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br i1 %cond, label %then, label %end
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then:
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store i64 25, ptr addrspace(3) @private_global_used_more_than_once_in_same_fct
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br label %end
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end:
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ret void
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}
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