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fdb188ccfd033ee9bbeff6807efdf0863a9318cf
carbon-lang/toolchain/lower/testdata/class/virtual.carbon
T
Burak EmirBurak Emirjonmeow
 fdb188ccfd Implement unused pattern bindings, continued (#6518) 
Implementation of unused pattern bindings #2022, continued.

Whereas previous PR #6460 took care of parsing, and PR #6479 prepared
the stage by using _ in some test cases, this PR has the the actual
implementation, using a simple dataflow analysis.

---------

Co-authored-by: Burak Emir <bqe@google.com>
Co-authored-by: jonmeow <jperkins@google.com>
2026-02-19 23:33:36 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/class/virtual.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/class/virtual.carbon
// --- classes.carbon
package Classes;
base class Base {
}
base class Intermediate {
extend base: Base;
virtual fn Fn[unused self: Self]() { }
}
class Derived {
extend base: Intermediate;
override fn Fn[unused self: Self]() { }
}
// --- create.carbon
package Create;
import Classes;
fn Create() {
var _: Classes.Base = {};
var _: Classes.Intermediate = {.base = {}};
var _: Classes.Derived = {.base = {.base = {}}};
// Implicit initialization creates an object with the unformed state, which
// doesn't include vptr initialization.
var _: Classes.Derived;
}
fn Use(v: Classes.Intermediate*) {
v->Fn();
}
// --- member_init.carbon
package MemberInit;
base class Base {
var m: i32;
virtual fn Fn[unused self: Self]() { }
}
fn Fn() {
var i: i32 = 3;
var v: Base = {.m = i};
v.m = 5;
var _: Base = {.m = 3};
}
// --- member_brace_init.carbon
library "[[@TEST_NAME]]";
base class Base {
virtual fn F[self: Self]();
}
class Derived {
extend base: Base;
}
fn Use() {
var _ : Derived = {.base = {}};
}
// --- call.carbon
library "[[@TEST_NAME]]";
base class Base {
virtual fn F[self: Self]();
}
fn Use(b: Base) {
b.F();
}
// --- call_impl.carbon
library "[[@TEST_NAME]]";
base class Base {
virtual fn F[self: Self]();
}
class Derived {
extend base: Base;
override fn F[self: Self]();
}
fn Use() {
var v : Derived = {.base = {}};
v.F();
}
// --- generic_noop.carbon
library "[[@TEST_NAME]]";
base class Base(T:! type) {
virtual fn F[unused self: Self]() { }
}
// --- generic_use.carbon
library "[[@TEST_NAME]]";
base class Base(T:! Core.Destroy) {
virtual fn F[unused self: Self]() {
var _: T;
}
}
class T1 { }
class T2 {
var v: T1;
}
fn F() {
var _: Base(T1) = {};
var _: Base(T2) = {};
}
// --- generic_base.carbon
library "[[@TEST_NAME]]";
base class Base(T:! type) {
virtual fn F[unused self: Self]() { }
}
class T1;
class Derived {
extend base: Base(T1);
}
fn Make() {
var _: Derived;
}
// CHECK:STDOUT: ; ModuleID = 'classes.carbon'
// CHECK:STDOUT: source_filename = "classes.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CIntermediate.Classes.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CFn.Intermediate.Classes to i64), i64 ptrtoint (ptr @"_CIntermediate.Classes.$vtable" to i64)) to i32)]
// CHECK:STDOUT: @"_CDerived.Classes.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CFn.Derived.Classes to i64), i64 ptrtoint (ptr @"_CDerived.Classes.$vtable" to i64)) to i32)]
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CFn.Intermediate.Classes(ptr %self) #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !10
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CFn.Derived.Classes(ptr %self) #0 !dbg !11 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !14
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "classes.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Fn", linkageName: "_CFn.Intermediate.Classes", scope: null, file: !3, line: 9, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null, !7}
// CHECK:STDOUT: !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !8 = !{!9}
// CHECK:STDOUT: !9 = !DILocalVariable(arg: 1, scope: !4, type: !7)
// CHECK:STDOUT: !10 = !DILocation(line: 9, column: 3, scope: !4)
// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Fn", linkageName: "_CFn.Derived.Classes", scope: null, file: !3, line: 14, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !12)
// CHECK:STDOUT: !12 = !{!13}
// CHECK:STDOUT: !13 = !DILocalVariable(arg: 1, scope: !11, type: !7)
// CHECK:STDOUT: !14 = !DILocation(line: 14, column: 3, scope: !11)
// CHECK:STDOUT: ; ModuleID = 'create.carbon'
// CHECK:STDOUT: source_filename = "create.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CIntermediate.Classes.$vtable" = external unnamed_addr constant ptr
// CHECK:STDOUT: @"_CDerived.Classes.$vtable" = external unnamed_addr constant ptr
// CHECK:STDOUT: @Base.val.loc7_3 = internal constant {} zeroinitializer
// CHECK:STDOUT: @Intermediate.val.ec2.loc8_3 = internal constant { ptr, {} } { ptr @"_CIntermediate.Classes.$vtable", {} zeroinitializer }
// CHECK:STDOUT: @Derived.val.loc9_3 = internal constant { { ptr, {} } } { { ptr, {} } { ptr @"_CDerived.Classes.$vtable", {} zeroinitializer } }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CCreate.Create() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %_.var.loc7 = alloca {}, align 8, !dbg !7
// CHECK:STDOUT: %_.var.loc8 = alloca { ptr, {} }, align 8, !dbg !8
// CHECK:STDOUT: %_.var.loc9 = alloca { { ptr, {} } }, align 8, !dbg !9
// CHECK:STDOUT: %_.var.loc12 = alloca { { ptr, {} } }, align 8, !dbg !10
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.loc7), !dbg !7
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %_.var.loc7, ptr align 1 @Base.val.loc7_3, i64 0, i1 false), !dbg !7
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.loc8), !dbg !8
// CHECK:STDOUT: %.loc8_44.2.vptr = getelementptr inbounds nuw { ptr, {} }, ptr %_.var.loc8, i32 0, i32 0, !dbg !11
// CHECK:STDOUT: %.loc8_44.4.base = getelementptr inbounds nuw { ptr, {} }, ptr %_.var.loc8, i32 0, i32 1, !dbg !11
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %_.var.loc8, ptr align 8 @Intermediate.val.ec2.loc8_3, i64 8, i1 false), !dbg !8
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.loc9), !dbg !9
// CHECK:STDOUT: %.loc9_49.2.base = getelementptr inbounds nuw { { ptr, {} } }, ptr %_.var.loc9, i32 0, i32 0, !dbg !12
// CHECK:STDOUT: %.loc9_48.2.vptr = getelementptr inbounds nuw { ptr, {} }, ptr %.loc9_49.2.base, i32 0, i32 0, !dbg !13
// CHECK:STDOUT: %.loc9_48.4.base = getelementptr inbounds nuw { ptr, {} }, ptr %.loc9_49.2.base, i32 0, i32 1, !dbg !13
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %_.var.loc9, ptr align 8 @Derived.val.loc9_3, i64 8, i1 false), !dbg !9
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.loc12), !dbg !10
// CHECK:STDOUT: ret void, !dbg !14
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CFn.Intermediate.Classes(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CFn.Derived.Classes(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CUse.Create(ptr %v) #0 !dbg !15 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %Intermediate.Fn.call.vtable = load ptr, ptr %v, align 8, !dbg !21
// CHECK:STDOUT: %Intermediate.Fn.call = call ptr @llvm.load.relative.i32(ptr %Intermediate.Fn.call.vtable, i32 0), !dbg !21
// CHECK:STDOUT: call void %Intermediate.Fn.call(ptr %v), !dbg !21
// CHECK:STDOUT: ret void, !dbg !22
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #2
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: read)
// CHECK:STDOUT: declare ptr @llvm.load.relative.i32(ptr, i32) #3
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 3, 2, 1, 0 }
// CHECK:STDOUT: uselistorder ptr @llvm.memcpy.p0.p0.i64, { 2, 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: read) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "create.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Create", linkageName: "_CCreate.Create", scope: null, file: !3, line: 6, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null}
// CHECK:STDOUT: !7 = !DILocation(line: 7, column: 3, scope: !4)
// CHECK:STDOUT: !8 = !DILocation(line: 8, column: 3, scope: !4)
// CHECK:STDOUT: !9 = !DILocation(line: 9, column: 3, scope: !4)
// CHECK:STDOUT: !10 = !DILocation(line: 12, column: 3, scope: !4)
// CHECK:STDOUT: !11 = !DILocation(line: 8, column: 33, scope: !4)
// CHECK:STDOUT: !12 = !DILocation(line: 9, column: 28, scope: !4)
// CHECK:STDOUT: !13 = !DILocation(line: 9, column: 37, scope: !4)
// CHECK:STDOUT: !14 = !DILocation(line: 6, column: 1, scope: !4)
// CHECK:STDOUT: !15 = distinct !DISubprogram(name: "Use", linkageName: "_CUse.Create", scope: null, file: !3, line: 15, type: !16, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !19)
// CHECK:STDOUT: !16 = !DISubroutineType(types: !17)
// CHECK:STDOUT: !17 = !{null, !18}
// CHECK:STDOUT: !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !19 = !{!20}
// CHECK:STDOUT: !20 = !DILocalVariable(arg: 1, scope: !15, type: !18)
// CHECK:STDOUT: !21 = !DILocation(line: 16, column: 3, scope: !15)
// CHECK:STDOUT: !22 = !DILocation(line: 15, column: 1, scope: !15)
// CHECK:STDOUT: ; ModuleID = 'member_init.carbon'
// CHECK:STDOUT: source_filename = "member_init.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CBase.MemberInit.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CFn.Base.MemberInit to i64), i64 ptrtoint (ptr @"_CBase.MemberInit.$vtable" to i64)) to i32)]
// CHECK:STDOUT: @Base.val.loc13_3 = internal constant { ptr, i32 } { ptr @"_CBase.MemberInit.$vtable", i32 3 }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CFn.Base.MemberInit(ptr %self) #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !10
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CFn.MemberInit() #0 !dbg !11 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %i.var = alloca i32, align 4, !dbg !14
// CHECK:STDOUT: %v.var = alloca { ptr, i32 }, align 8, !dbg !15
// CHECK:STDOUT: %_.var = alloca { ptr, i32 }, align 8, !dbg !16
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %i.var), !dbg !14
// CHECK:STDOUT: store i32 3, ptr %i.var, align 4, !dbg !14
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %v.var), !dbg !15
// CHECK:STDOUT: %.loc11_24.2.vptr = getelementptr inbounds nuw { ptr, i32 }, ptr %v.var, i32 0, i32 0, !dbg !17
// CHECK:STDOUT: %.loc11_23 = load i32, ptr %i.var, align 4, !dbg !18
// CHECK:STDOUT: %.loc11_24.4.m = getelementptr inbounds nuw { ptr, i32 }, ptr %v.var, i32 0, i32 1, !dbg !17
// CHECK:STDOUT: store i32 %.loc11_23, ptr %.loc11_24.4.m, align 4, !dbg !17
// CHECK:STDOUT: store ptr @"_CBase.MemberInit.$vtable", ptr %.loc11_24.2.vptr, align 8, !dbg !17
// CHECK:STDOUT: %.loc12_4.m = getelementptr inbounds nuw { ptr, i32 }, ptr %v.var, i32 0, i32 1, !dbg !19
// CHECK:STDOUT: store i32 5, ptr %.loc12_4.m, align 4, !dbg !19
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !16
// CHECK:STDOUT: %.loc13_24.2.vptr = getelementptr inbounds nuw { ptr, i32 }, ptr %_.var, i32 0, i32 0, !dbg !20
// CHECK:STDOUT: %.loc13_24.5.m = getelementptr inbounds nuw { ptr, i32 }, ptr %_.var, i32 0, i32 1, !dbg !20
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %_.var, ptr align 8 @Base.val.loc13_3, i64 16, i1 false), !dbg !16
// CHECK:STDOUT: ret void, !dbg !21
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #2
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 2, 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "member_init.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Fn", linkageName: "_CFn.Base.MemberInit", scope: null, file: !3, line: 6, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null, !7}
// CHECK:STDOUT: !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !8 = !{!9}
// CHECK:STDOUT: !9 = !DILocalVariable(arg: 1, scope: !4, type: !7)
// CHECK:STDOUT: !10 = !DILocation(line: 6, column: 3, scope: !4)
// CHECK:STDOUT: !11 = distinct !DISubprogram(name: "Fn", linkageName: "_CFn.MemberInit", scope: null, file: !3, line: 9, type: !12, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !12 = !DISubroutineType(types: !13)
// CHECK:STDOUT: !13 = !{null}
// CHECK:STDOUT: !14 = !DILocation(line: 10, column: 3, scope: !11)
// CHECK:STDOUT: !15 = !DILocation(line: 11, column: 3, scope: !11)
// CHECK:STDOUT: !16 = !DILocation(line: 13, column: 3, scope: !11)
// CHECK:STDOUT: !17 = !DILocation(line: 11, column: 17, scope: !11)
// CHECK:STDOUT: !18 = !DILocation(line: 11, column: 23, scope: !11)
// CHECK:STDOUT: !19 = !DILocation(line: 12, column: 3, scope: !11)
// CHECK:STDOUT: !20 = !DILocation(line: 13, column: 17, scope: !11)
// CHECK:STDOUT: !21 = !DILocation(line: 9, column: 1, scope: !11)
// CHECK:STDOUT: ; ModuleID = 'member_brace_init.carbon'
// CHECK:STDOUT: source_filename = "member_brace_init.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CBase.Main.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Base.Main to i64), i64 ptrtoint (ptr @"_CBase.Main.$vtable" to i64)) to i32)]
// CHECK:STDOUT: @"_CDerived.Main.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Base.Main to i64), i64 ptrtoint (ptr @"_CDerived.Main.$vtable" to i64)) to i32)]
// CHECK:STDOUT: @Derived.val.loc13_3 = internal constant { { ptr } } { { ptr } { ptr @"_CDerived.Main.$vtable" } }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CF.Base.Main(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CUse.Main() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %_.var = alloca { { ptr } }, align 8, !dbg !7
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !7
// CHECK:STDOUT: %.loc13_32.2.base = getelementptr inbounds nuw { { ptr } }, ptr %_.var, i32 0, i32 0, !dbg !8
// CHECK:STDOUT: %.loc13_31.2.vptr = getelementptr inbounds nuw { ptr }, ptr %.loc13_32.2.base, i32 0, i32 0, !dbg !9
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %_.var, ptr align 8 @Derived.val.loc13_3, i64 8, i1 false), !dbg !7
// CHECK:STDOUT: ret void, !dbg !10
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #2
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "member_brace_init.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Use", linkageName: "_CUse.Main", scope: null, file: !3, line: 12, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null}
// CHECK:STDOUT: !7 = !DILocation(line: 13, column: 3, scope: !4)
// CHECK:STDOUT: !8 = !DILocation(line: 13, column: 21, scope: !4)
// CHECK:STDOUT: !9 = !DILocation(line: 13, column: 30, scope: !4)
// CHECK:STDOUT: !10 = !DILocation(line: 12, column: 1, scope: !4)
// CHECK:STDOUT: ; ModuleID = 'call.carbon'
// CHECK:STDOUT: source_filename = "call.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CBase.Main.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Base.Main to i64), i64 ptrtoint (ptr @"_CBase.Main.$vtable" to i64)) to i32)]
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CF.Base.Main(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CUse.Main(ptr %b) #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %Base.F.call.vtable = load ptr, ptr %b, align 8, !dbg !10
// CHECK:STDOUT: %Base.F.call = call ptr @llvm.load.relative.i32(ptr %Base.F.call.vtable, i32 0), !dbg !10
// CHECK:STDOUT: call void %Base.F.call(ptr %b), !dbg !10
// CHECK:STDOUT: ret void, !dbg !11
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: read)
// CHECK:STDOUT: declare ptr @llvm.load.relative.i32(ptr, i32) #1
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: read) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "call.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Use", linkageName: "_CUse.Main", scope: null, file: !3, line: 8, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null, !7}
// CHECK:STDOUT: !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !8 = !{!9}
// CHECK:STDOUT: !9 = !DILocalVariable(arg: 1, scope: !4, type: !7)
// CHECK:STDOUT: !10 = !DILocation(line: 9, column: 3, scope: !4)
// CHECK:STDOUT: !11 = !DILocation(line: 8, column: 1, scope: !4)
// CHECK:STDOUT: ; ModuleID = 'call_impl.carbon'
// CHECK:STDOUT: source_filename = "call_impl.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CBase.Main.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Base.Main to i64), i64 ptrtoint (ptr @"_CBase.Main.$vtable" to i64)) to i32)]
// CHECK:STDOUT: @"_CDerived.Main.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Derived.Main to i64), i64 ptrtoint (ptr @"_CDerived.Main.$vtable" to i64)) to i32)]
// CHECK:STDOUT: @Derived.val.loc14_3 = internal constant { { ptr } } { { ptr } { ptr @"_CDerived.Main.$vtable" } }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CF.Base.Main(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CF.Derived.Main(ptr)
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CUse.Main() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %v.var = alloca { { ptr } }, align 8, !dbg !7
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %v.var), !dbg !7
// CHECK:STDOUT: %.loc14_32.2.base = getelementptr inbounds nuw { { ptr } }, ptr %v.var, i32 0, i32 0, !dbg !8
// CHECK:STDOUT: %.loc14_31.2.vptr = getelementptr inbounds nuw { ptr }, ptr %.loc14_32.2.base, i32 0, i32 0, !dbg !9
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %v.var, ptr align 8 @Derived.val.loc14_3, i64 8, i1 false), !dbg !7
// CHECK:STDOUT: %Derived.F.call.vtable = load ptr, ptr %v.var, align 8, !dbg !10
// CHECK:STDOUT: %Derived.F.call = call ptr @llvm.load.relative.i32(ptr %Derived.F.call.vtable, i32 0), !dbg !10
// CHECK:STDOUT: call void %Derived.F.call(ptr %v.var), !dbg !10
// CHECK:STDOUT: ret void, !dbg !11
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #2
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: read)
// CHECK:STDOUT: declare ptr @llvm.load.relative.i32(ptr, i32) #3
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: read) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "call_impl.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Use", linkageName: "_CUse.Main", scope: null, file: !3, line: 13, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null}
// CHECK:STDOUT: !7 = !DILocation(line: 14, column: 3, scope: !4)
// CHECK:STDOUT: !8 = !DILocation(line: 14, column: 21, scope: !4)
// CHECK:STDOUT: !9 = !DILocation(line: 14, column: 30, scope: !4)
// CHECK:STDOUT: !10 = !DILocation(line: 15, column: 3, scope: !4)
// CHECK:STDOUT: !11 = !DILocation(line: 13, column: 1, scope: !4)
// CHECK:STDOUT: ; ModuleID = 'generic_noop.carbon'
// CHECK:STDOUT: source_filename = "generic_noop.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "generic_noop.carbon", directory: "")
// CHECK:STDOUT: ; ModuleID = 'generic_use.carbon'
// CHECK:STDOUT: source_filename = "generic_use.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CBase.Main.$vtable.96f6f8089267cbd5" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Base.Main.96f6f8089267cbd5 to i64), i64 ptrtoint (ptr @"_CBase.Main.$vtable.96f6f8089267cbd5" to i64)) to i32)]
// CHECK:STDOUT: @"_CBase.Main.$vtable.75b7906de8c4f93d" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Base.Main.75b7906de8c4f93d to i64), i64 ptrtoint (ptr @"_CBase.Main.$vtable.75b7906de8c4f93d" to i64)) to i32)]
// CHECK:STDOUT: @Base.val.5e1.loc16_3 = internal constant { ptr } { ptr @"_CBase.Main.$vtable.96f6f8089267cbd5" }
// CHECK:STDOUT: @Base.val.939.loc17_3 = internal constant { ptr } { ptr @"_CBase.Main.$vtable.75b7906de8c4f93d" }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CF.Main() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %_.var.loc16 = alloca { ptr }, align 8, !dbg !7
// CHECK:STDOUT: %_.var.loc17 = alloca { ptr }, align 8, !dbg !8
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.loc16), !dbg !7
// CHECK:STDOUT: %.loc16_22.2.vptr = getelementptr inbounds nuw { ptr }, ptr %_.var.loc16, i32 0, i32 0, !dbg !9
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %_.var.loc16, ptr align 8 @Base.val.5e1.loc16_3, i64 8, i1 false), !dbg !7
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var.loc17), !dbg !8
// CHECK:STDOUT: %.loc17_22.2.vptr = getelementptr inbounds nuw { ptr }, ptr %_.var.loc17, i32 0, i32 0, !dbg !10
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %_.var.loc17, ptr align 8 @Base.val.939.loc17_3, i64 8, i1 false), !dbg !8
// CHECK:STDOUT: ret void, !dbg !11
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Base.Main.96f6f8089267cbd5(ptr %self) #0 !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %_.var = alloca {}, align 8, !dbg !18
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !18
// CHECK:STDOUT: ret void, !dbg !19
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Base.Main.75b7906de8c4f93d(ptr %self) #0 !dbg !20 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %_.var = alloca { {} }, align 8, !dbg !23
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !23
// CHECK:STDOUT: ret void, !dbg !24
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #2
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 3, 2, 1, 0 }
// CHECK:STDOUT: uselistorder ptr @llvm.memcpy.p0.p0.i64, { 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "generic_use.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 15, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null}
// CHECK:STDOUT: !7 = !DILocation(line: 16, column: 3, scope: !4)
// CHECK:STDOUT: !8 = !DILocation(line: 17, column: 3, scope: !4)
// CHECK:STDOUT: !9 = !DILocation(line: 16, column: 21, scope: !4)
// CHECK:STDOUT: !10 = !DILocation(line: 17, column: 21, scope: !4)
// CHECK:STDOUT: !11 = !DILocation(line: 15, column: 1, scope: !4)
// CHECK:STDOUT: !12 = distinct !DISubprogram(name: "F", linkageName: "_CF.Base.Main.96f6f8089267cbd5", scope: null, file: !3, line: 5, type: !13, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !16)
// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
// CHECK:STDOUT: !14 = !{null, !15}
// CHECK:STDOUT: !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !16 = !{!17}
// CHECK:STDOUT: !17 = !DILocalVariable(arg: 1, scope: !12, type: !15)
// CHECK:STDOUT: !18 = !DILocation(line: 6, column: 5, scope: !12)
// CHECK:STDOUT: !19 = !DILocation(line: 5, column: 3, scope: !12)
// CHECK:STDOUT: !20 = distinct !DISubprogram(name: "F", linkageName: "_CF.Base.Main.75b7906de8c4f93d", scope: null, file: !3, line: 5, type: !13, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !21)
// CHECK:STDOUT: !21 = !{!22}
// CHECK:STDOUT: !22 = !DILocalVariable(arg: 1, scope: !20, type: !15)
// CHECK:STDOUT: !23 = !DILocation(line: 6, column: 5, scope: !20)
// CHECK:STDOUT: !24 = !DILocation(line: 5, column: 3, scope: !20)
// CHECK:STDOUT: ; ModuleID = 'generic_base.carbon'
// CHECK:STDOUT: source_filename = "generic_base.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @"_CDerived.Main.$vtable" = unnamed_addr constant [1 x i32] [i32 trunc (i64 sub (i64 ptrtoint (ptr @_CF.Base.Main.c914672a22d4cb10 to i64), i64 ptrtoint (ptr @"_CDerived.Main.$vtable" to i64)) to i32)]
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CMake.Main() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %_.var = alloca { { ptr } }, align 8, !dbg !7
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !7
// CHECK:STDOUT: ret void, !dbg !8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Base.Main.c914672a22d4cb10(ptr %self) #0 !dbg !9 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !15
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "generic_base.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Make", linkageName: "_CMake.Main", scope: null, file: !3, line: 14, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null}
// CHECK:STDOUT: !7 = !DILocation(line: 15, column: 3, scope: !4)
// CHECK:STDOUT: !8 = !DILocation(line: 14, column: 1, scope: !4)
// CHECK:STDOUT: !9 = distinct !DISubprogram(name: "F", linkageName: "_CF.Base.Main.c914672a22d4cb10", scope: null, file: !3, line: 5, type: !10, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !13)
// CHECK:STDOUT: !10 = !DISubroutineType(types: !11)
// CHECK:STDOUT: !11 = !{null, !12}
// CHECK:STDOUT: !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 8)
// CHECK:STDOUT: !13 = !{!14}
// CHECK:STDOUT: !14 = !DILocalVariable(arg: 1, scope: !9, type: !12)
// CHECK:STDOUT: !15 = !DILocation(line: 5, column: 3, scope: !9)
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