1; RUN: llc -o - %s -mtriple=nvptx -mcpu=sm_20 | FileCheck %s 2 3; Check that we do global variable demotion when the symbols don't need to be 4; shared across modules or functions. 5 6; Variable visible globally can't be demoted. 7; CHECK: .visible .shared .align 4 .u64 external_global 8@external_global = addrspace(3) global i64 undef, align 4 9 10; Not externally visible global used in only one function => demote. 11; It should live in @define_internal_global. 12@internal_global = internal addrspace(3) global i64 undef, align 4 13 14; Not externally visible global used in several functions => keep. 15; CHECK: .shared .align 4 .u64 internal_global_used_in_different_fcts 16@internal_global_used_in_different_fcts = internal addrspace(3) global i64 undef, align 4 17 18; Not externally visible global used in only one function => demote. 19; It should live in @define_private_global. 20@private_global = private addrspace(3) global i64 undef, align 4 21 22; Not externally visible global used in only one function 23; (but with several uses) => demote. 24; It should live in @define_private_global_more_than_one_use. 25@private_global_used_more_than_once_in_same_fct = private addrspace(3) global i64 undef, align 4 26 27; CHECK-LABEL: define_external_global( 28define void @define_external_global(i64 %val) { 29 store i64 %val, ptr addrspace(3) @external_global 30 ret void 31} 32 33; CHECK-LABEL: define_internal_global( 34; Demoted `internal_global` should live here. 35; CHECK: .shared .align 4 .u64 internal_global 36define void @define_internal_global(i64 %val) { 37 store i64 %val, ptr addrspace(3) @internal_global 38 ret void 39} 40 41; CHECK-LABEL: define_internal_global_with_different_fct1( 42; CHECK-NOT: .shared .align 4 .u64 internal_global_used_in_different_fcts 43define void @define_internal_global_with_different_fct1(i64 %val) { 44 store i64 %val, ptr addrspace(3) @internal_global_used_in_different_fcts 45 ret void 46} 47 48; CHECK-LABEL: define_internal_global_with_different_fct2( 49; CHECK-NOT: .shared .align 4 .u64 internal_global_used_in_different_fcts 50define void @define_internal_global_with_different_fct2(i64 %val) { 51 store i64 %val, ptr addrspace(3) @internal_global_used_in_different_fcts 52 ret void 53} 54 55; CHECK-LABEL: define_private_global( 56; Demoted `private_global` should live here. 57; CHECK: .shared .align 4 .u64 private_global 58define void @define_private_global(i64 %val) { 59 store i64 %val, ptr addrspace(3) @private_global 60 ret void 61} 62 63; CHECK-LABEL: define_private_global_more_than_one_use( 64; Demoted `private_global_used_more_than_once_in_same_fct` should live here. 65; CHECK: .shared .align 4 .u64 private_global_used_more_than_once_in_same_fct 66; 67; Also check that the if-then is still here, otherwise we may not be testing 68; the "more-than-one-use" part. 69; CHECK: st.shared.u64 [private_global_used_more_than_once_in_same_fct], 70; CHECK: mov.b64 %[[VAR:.*]], 25 71; CHECK: st.shared.u64 [private_global_used_more_than_once_in_same_fct], %[[VAR]] 72define void @define_private_global_more_than_one_use(i64 %val, i1 %cond) { 73 store i64 %val, ptr addrspace(3) @private_global_used_more_than_once_in_same_fct 74 br i1 %cond, label %then, label %end 75 76then: 77 store i64 25, ptr addrspace(3) @private_global_used_more_than_once_in_same_fct 78 br label %end 79 80end: 81 ret void 82} 83