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carbon-lang/toolchain/lower/testdata/function/generic/import.carbon
T
Richard Smith cefa0397bb More fixes to package and library fingerprinting. (#7297) 
Fix import logic to make all imported packages be children of the
`NameScopeId::Package` scope. Previously, indirectly-imported packages
would end up as children of their importing package's scope, which
resulted in them not being treated as packages at all, and in particular
not being fingerprinted as packages.

Fixing that caused a failure in the fingerprinting logic as we started
to encounter packages with no correspoding import scopes. Instead of
looking for import scopes, use a simpler mechanism to map packages to
their package names, and clean up.

Unfortunately the latter change churns all the fingerprints again :(
Hopefully this is the last time for a while.
2026-06-04 17:41:46 +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/function/generic/import.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/function/generic/import.carbon
// Test that we can import and call generic functions across libraries, both
// when the generic is defined in a directly imported library and when it's
// defined in an indirectly imported library.
// --- indirectly_imported.carbon
library "[[@TEST_NAME]]";
fn IndirectDeclared();
fn IndirectDefined() {}
fn IndirectGeneric(T:! type, x: T*) -> T* {
IndirectDeclared();
IndirectDefined();
return x;
}
// --- directly_imported.carbon
library "[[@TEST_NAME]]";
import library "indirectly_imported";
fn DirectDeclared();
fn DirectDefined() {}
fn DirectGeneric(T:! type, y: T*) -> T* {
DirectDeclared();
DirectDefined();
return IndirectGeneric(T, y);
}
// --- use.carbon
library "[[@TEST_NAME]]";
import library "directly_imported";
fn Call() -> i32 {
var n: i32 = 0;
var p: i32* = DirectGeneric(i32, &n);
return *p;
}
// CHECK:STDOUT: ; ModuleID = 'indirectly_imported.carbon'
// CHECK:STDOUT: source_filename = "indirectly_imported.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CIndirectDeclared.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CIndirectDefined.Main() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !7
// 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: "indirectly_imported.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "IndirectDefined", linkageName: "_CIndirectDefined.Main", 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: 6, column: 1, scope: !4)
// CHECK:STDOUT: ; ModuleID = 'directly_imported.carbon'
// CHECK:STDOUT: source_filename = "directly_imported.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CDirectDeclared.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @_CDirectDefined.Main() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !7
// 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: "directly_imported.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "DirectDefined", linkageName: "_CDirectDefined.Main", scope: null, file: !3, line: 8, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null}
// CHECK:STDOUT: !7 = !DILocation(line: 8, column: 1, scope: !4)
// CHECK:STDOUT: ; ModuleID = 'use.carbon'
// CHECK:STDOUT: source_filename = "use.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CCall.Main() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %n.var = alloca i32, align 4, !dbg !8
// CHECK:STDOUT: %p.var = alloca ptr, align 8, !dbg !9
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !8
// CHECK:STDOUT: store i32 0, ptr %n.var, align 4, !dbg !8
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %p.var), !dbg !9
// CHECK:STDOUT: %DirectGeneric.call = call ptr @_CDirectGeneric.Main.84588f41d61dafba(ptr %n.var), !dbg !10
// CHECK:STDOUT: store ptr %DirectGeneric.call, ptr %p.var, align 8, !dbg !9
// CHECK:STDOUT: %.loc9_11 = load ptr, ptr %p.var, align 8, !dbg !11
// CHECK:STDOUT: %.loc9_10.2 = load i32, ptr %.loc9_11, align 4, !dbg !12
// CHECK:STDOUT: call void @"_COp.5e27612b9dd31a14:core.Destroy.Core"(ptr %n.var), !dbg !8
// CHECK:STDOUT: ret i32 %.loc9_10.2, !dbg !13
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define weak_odr void @"_COp.5e27612b9dd31a14:core.Destroy.Core"(ptr %self) #0 !dbg !14 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !19
// 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: nounwind
// CHECK:STDOUT: define linkonce_odr ptr @_CDirectGeneric.Main.84588f41d61dafba(ptr %y) #0 !dbg !20 {
// CHECK:STDOUT: call void @_CDirectDeclared.Main(), !dbg !27
// CHECK:STDOUT: call void @_CDirectDefined.Main(), !dbg !28
// CHECK:STDOUT: %1 = call ptr @_CIndirectGeneric.Main.84588f41d61dafba(ptr %y), !dbg !29
// CHECK:STDOUT: ret ptr %1, !dbg !30
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CDirectDeclared.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CDirectDefined.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr ptr @_CIndirectGeneric.Main.84588f41d61dafba(ptr %x) #0 !dbg !31 {
// CHECK:STDOUT: call void @_CIndirectDeclared.Main(), !dbg !35
// CHECK:STDOUT: call void @_CIndirectDefined.Main(), !dbg !36
// CHECK:STDOUT: ret ptr %x, !dbg !37
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CIndirectDeclared.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: declare void @_CIndirectDefined.Main()
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 1, 0 }
// 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: "use.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Call", linkageName: "_CCall.Main", scope: null, file: !3, line: 6, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{!7}
// CHECK:STDOUT: !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !8 = !DILocation(line: 7, column: 3, scope: !4)
// CHECK:STDOUT: !9 = !DILocation(line: 8, column: 3, scope: !4)
// CHECK:STDOUT: !10 = !DILocation(line: 8, column: 17, scope: !4)
// CHECK:STDOUT: !11 = !DILocation(line: 9, column: 11, scope: !4)
// CHECK:STDOUT: !12 = !DILocation(line: 9, column: 10, scope: !4)
// CHECK:STDOUT: !13 = !DILocation(line: 9, column: 3, scope: !4)
// CHECK:STDOUT: !14 = distinct !DISubprogram(name: "Op", linkageName: "_COp.5e27612b9dd31a14:core.Destroy.Core", scope: null, file: !3, line: 7, type: !15, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !17)
// CHECK:STDOUT: !15 = !DISubroutineType(types: !16)
// CHECK:STDOUT: !16 = !{null, !7}
// CHECK:STDOUT: !17 = !{!18}
// CHECK:STDOUT: !18 = !DILocalVariable(arg: 1, scope: !14, type: !7)
// CHECK:STDOUT: !19 = !DILocation(line: 7, column: 3, scope: !14)
// CHECK:STDOUT: !20 = distinct !DISubprogram(name: "DirectGeneric", linkageName: "_CDirectGeneric.Main.84588f41d61dafba", scope: null, file: !21, line: 10, type: !22, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !25)
// CHECK:STDOUT: !21 = !DIFile(filename: "directly_imported.carbon", directory: "")
// CHECK:STDOUT: !22 = !DISubroutineType(types: !23)
// CHECK:STDOUT: !23 = !{!24, !24}
// CHECK:STDOUT: !24 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !25 = !{!26}
// CHECK:STDOUT: !26 = !DILocalVariable(arg: 1, scope: !20, type: !24)
// CHECK:STDOUT: !27 = !DILocation(line: 11, column: 3, scope: !20)
// CHECK:STDOUT: !28 = !DILocation(line: 12, column: 3, scope: !20)
// CHECK:STDOUT: !29 = !DILocation(line: 13, column: 10, scope: !20)
// CHECK:STDOUT: !30 = !DILocation(line: 13, column: 3, scope: !20)
// CHECK:STDOUT: !31 = distinct !DISubprogram(name: "IndirectGeneric", linkageName: "_CIndirectGeneric.Main.84588f41d61dafba", scope: null, file: !32, line: 8, type: !22, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !33)
// CHECK:STDOUT: !32 = !DIFile(filename: "indirectly_imported.carbon", directory: "")
// CHECK:STDOUT: !33 = !{!34}
// CHECK:STDOUT: !34 = !DILocalVariable(arg: 1, scope: !31, type: !24)
// CHECK:STDOUT: !35 = !DILocation(line: 9, column: 3, scope: !31)
// CHECK:STDOUT: !36 = !DILocation(line: 10, column: 3, scope: !31)
// CHECK:STDOUT: !37 = !DILocation(line: 11, column: 3, scope: !31)
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