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carbon-lang/toolchain/lower/testdata/function/generic/call_recursive_impl.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/full.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/call_recursive_impl.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/function/generic/call_recursive_impl.carbon
import Core library "io";
interface I {
fn F();
}
class X {}
impl X as I {
fn F() { Core.Print(1); }
}
class Y {}
impl Y as I {
fn F() { Core.Print(2); }
}
// Builds on "call_different_impls.carbon", cannot lower a single G due to
// different calls to F. Additionally, add recursion so the function
// fingerprint is dependent on itself.
fn G(T:! I, count: i32) -> i32 {
T.F();
if (count > 0) {
return count;
}
return G(T, count + 1);
}
fn Run() {
G(X, 0);
G(Y, 0);
}
// CHECK:STDOUT: ; ModuleID = 'call_recursive_impl.carbon'
// CHECK:STDOUT: source_filename = "call_recursive_impl.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @printf.int.format = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CF.X.Main:I.Main"() #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %Print.call = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 1), !dbg !7
// CHECK:STDOUT: ret void, !dbg !8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define void @"_CF.Y.Main:I.Main"() #0 !dbg !9 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %Print.call = call i32 (ptr, ...) @printf(ptr @printf.int.format, i32 2), !dbg !10
// CHECK:STDOUT: ret void, !dbg !11
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @main() #0 !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %G.call.loc40 = call i32 @_CG.Main.c81631f865470482(i32 0), !dbg !16
// CHECK:STDOUT: %G.call.loc41 = call i32 @_CG.Main.0b241ec84a68877b(i32 0), !dbg !17
// CHECK:STDOUT: ret i32 0, !dbg !18
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: declare i32 @printf(ptr, ...)
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr i32 @_CG.Main.c81631f865470482(i32 %count) #0 !dbg !19 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CF.X.Main:I.Main"(), !dbg !24
// CHECK:STDOUT: %Int.as.OrderedWith.impl.Greater.call = icmp sgt i32 %count, 0, !dbg !25
// CHECK:STDOUT: br i1 %Int.as.OrderedWith.impl.Greater.call, label %if.then, label %if.else, !dbg !26
// CHECK:STDOUT:
// CHECK:STDOUT: if.then: ; preds = %entry
// CHECK:STDOUT: ret i32 %count, !dbg !27
// CHECK:STDOUT:
// CHECK:STDOUT: if.else: ; preds = %entry
// CHECK:STDOUT: %Int.as.AddWith.impl.Op.call = add i32 %count, 1, !dbg !28
// CHECK:STDOUT: %G.call = call i32 @_CG.Main.c81631f865470482(i32 %Int.as.AddWith.impl.Op.call), !dbg !29
// CHECK:STDOUT: ret i32 %G.call, !dbg !30
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr i32 @_CG.Main.0b241ec84a68877b(i32 %count) #0 !dbg !31 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: call void @"_CF.Y.Main:I.Main"(), !dbg !34
// CHECK:STDOUT: %Int.as.OrderedWith.impl.Greater.call = icmp sgt i32 %count, 0, !dbg !35
// CHECK:STDOUT: br i1 %Int.as.OrderedWith.impl.Greater.call, label %if.then, label %if.else, !dbg !36
// CHECK:STDOUT:
// CHECK:STDOUT: if.then: ; preds = %entry
// CHECK:STDOUT: ret i32 %count, !dbg !37
// CHECK:STDOUT:
// CHECK:STDOUT: if.else: ; preds = %entry
// CHECK:STDOUT: %Int.as.AddWith.impl.Op.call = add i32 %count, 1, !dbg !38
// CHECK:STDOUT: %G.call = call i32 @_CG.Main.0b241ec84a68877b(i32 %Int.as.AddWith.impl.Op.call), !dbg !39
// CHECK:STDOUT: ret i32 %G.call, !dbg !40
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @printf, { 1, 0 }
// 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: "call_recursive_impl.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.X.Main:I.Main", scope: null, file: !3, line: 20, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{null}
// CHECK:STDOUT: !7 = !DILocation(line: 20, column: 12, scope: !4)
// CHECK:STDOUT: !8 = !DILocation(line: 20, column: 3, scope: !4)
// CHECK:STDOUT: !9 = distinct !DISubprogram(name: "F", linkageName: "_CF.Y.Main:I.Main", scope: null, file: !3, line: 24, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !10 = !DILocation(line: 24, column: 12, scope: !9)
// CHECK:STDOUT: !11 = !DILocation(line: 24, column: 3, scope: !9)
// CHECK:STDOUT: !12 = distinct !DISubprogram(name: "Run", linkageName: "main", scope: null, file: !3, line: 39, type: !13, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
// CHECK:STDOUT: !14 = !{!15}
// CHECK:STDOUT: !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !16 = !DILocation(line: 40, column: 3, scope: !12)
// CHECK:STDOUT: !17 = !DILocation(line: 41, column: 3, scope: !12)
// CHECK:STDOUT: !18 = !DILocation(line: 39, column: 1, scope: !12)
// CHECK:STDOUT: !19 = distinct !DISubprogram(name: "G", linkageName: "_CG.Main.c81631f865470482", scope: null, file: !3, line: 30, type: !20, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !22)
// CHECK:STDOUT: !20 = !DISubroutineType(types: !21)
// CHECK:STDOUT: !21 = !{!15, !15}
// CHECK:STDOUT: !22 = !{!23}
// CHECK:STDOUT: !23 = !DILocalVariable(arg: 1, scope: !19, type: !15)
// CHECK:STDOUT: !24 = !DILocation(line: 31, column: 3, scope: !19)
// CHECK:STDOUT: !25 = !DILocation(line: 33, column: 7, scope: !19)
// CHECK:STDOUT: !26 = !DILocation(line: 33, column: 6, scope: !19)
// CHECK:STDOUT: !27 = !DILocation(line: 34, column: 5, scope: !19)
// CHECK:STDOUT: !28 = !DILocation(line: 36, column: 15, scope: !19)
// CHECK:STDOUT: !29 = !DILocation(line: 36, column: 10, scope: !19)
// CHECK:STDOUT: !30 = !DILocation(line: 36, column: 3, scope: !19)
// CHECK:STDOUT: !31 = distinct !DISubprogram(name: "G", linkageName: "_CG.Main.0b241ec84a68877b", scope: null, file: !3, line: 30, type: !20, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !32)
// CHECK:STDOUT: !32 = !{!33}
// CHECK:STDOUT: !33 = !DILocalVariable(arg: 1, scope: !31, type: !15)
// CHECK:STDOUT: !34 = !DILocation(line: 31, column: 3, scope: !31)
// CHECK:STDOUT: !35 = !DILocation(line: 33, column: 7, scope: !31)
// CHECK:STDOUT: !36 = !DILocation(line: 33, column: 6, scope: !31)
// CHECK:STDOUT: !37 = !DILocation(line: 34, column: 5, scope: !31)
// CHECK:STDOUT: !38 = !DILocation(line: 36, column: 15, scope: !31)
// CHECK:STDOUT: !39 = !DILocation(line: 36, column: 10, scope: !31)
// CHECK:STDOUT: !40 = !DILocation(line: 36, column: 3, scope: !31)
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