mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 19:20:13 +01:00
Richard Smith
9986d0da69
When forming the constant value of a `where` expression, don't consider it to be `.Self`-dependent if the dependence only comes from the RHS of the `where`. More generally, ignore `.Self` dependence when evaluating a facet type unless it comes from an extended interface or named constraint. While we can get other kinds of constraint from the left-hand side of a `where`, such constraints must either come from the right-hand side of other `where` expressions or be extend constraints. This fixes a crash in lowering caused by a concrete function containing a `.Self`-symbolic `where` constant. Assisted-by: Gemini via Antigravity
127 lines
5.1 KiB
Plaintext
127 lines
5.1 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.carbon
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/interface/where.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interface/where.carbon
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// --- basic.carbon
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library "[[@TEST_NAME]]";
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interface I {
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let T:! type;
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fn F();
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}
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class C {}
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impl C as I where .T = () {
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fn F() {
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}
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}
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// --- no_period_self_dependence.carbon
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library "[[@TEST_NAME]]";
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class C {}
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class D {}
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class E {}
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interface I(T:! type) { fn F[self: Self](); }
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interface J(T:! type) {}
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impl D as J(E) {}
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// The type of `T` is not `.Self`-dependent, because `.Self` appears after
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// `where`.
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impl forall [T:! type where D impls J(.Self)] C as I(T) {
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fn F[unused self: Self]() {}
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}
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fn F(a: C) {
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a.(I(E).F)();
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}
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fn G() {
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// This is a concrete, non-`.Self`-dependent type.
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// (Lowering would assert if it sees a dependent constant.)
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let unused t: type = type where D impls J(.Self);
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}
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// CHECK:STDOUT: ; ModuleID = 'basic.carbon'
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// CHECK:STDOUT: source_filename = "basic.carbon"
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nounwind
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// CHECK:STDOUT: define void @"_CF.C.Main:I.Main"() #0 !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: ret void, !dbg !7
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: attributes #0 = { nounwind }
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// CHECK:STDOUT:
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// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
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// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
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// CHECK:STDOUT:
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// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
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// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
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// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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// CHECK:STDOUT: !3 = !DIFile(filename: "basic.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.C.Main:I.Main", scope: null, file: !3, line: 12, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
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// CHECK:STDOUT: !6 = !{null}
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// CHECK:STDOUT: !7 = !DILocation(line: 12, column: 3, scope: !4)
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// CHECK:STDOUT: ; ModuleID = 'no_period_self_dependence.carbon'
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// CHECK:STDOUT: source_filename = "no_period_self_dependence.carbon"
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nounwind
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// CHECK:STDOUT: define void @_CF.Main(ptr %a) #0 !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: call void @"_CF.C.Main:I.5d7343568c0b5715.Main.36f6a86118c8cac1"(ptr %a), !dbg !10
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// CHECK:STDOUT: ret void, !dbg !11
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nounwind
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// CHECK:STDOUT: define void @_CG.Main() #0 !dbg !12 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: ret void, !dbg !15
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nounwind
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// CHECK:STDOUT: define linkonce_odr void @"_CF.C.Main:I.5d7343568c0b5715.Main.36f6a86118c8cac1"(ptr %self) #0 !dbg !16 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: ret void, !dbg !19
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: attributes #0 = { nounwind }
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// CHECK:STDOUT:
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// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
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// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
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// CHECK:STDOUT:
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// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
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// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
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// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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// CHECK:STDOUT: !3 = !DIFile(filename: "no_period_self_dependence.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 19, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
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// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
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// CHECK:STDOUT: !6 = !{null, !7}
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// CHECK:STDOUT: !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
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// CHECK:STDOUT: !8 = !{!9}
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// CHECK:STDOUT: !9 = !DILocalVariable(arg: 1, scope: !4, type: !7)
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// CHECK:STDOUT: !10 = !DILocation(line: 20, column: 3, scope: !4)
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// CHECK:STDOUT: !11 = !DILocation(line: 19, column: 1, scope: !4)
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// CHECK:STDOUT: !12 = distinct !DISubprogram(name: "G", linkageName: "_CG.Main", scope: null, file: !3, line: 23, type: !13, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !13 = !DISubroutineType(types: !14)
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// CHECK:STDOUT: !14 = !{null}
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// CHECK:STDOUT: !15 = !DILocation(line: 23, column: 1, scope: !12)
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// CHECK:STDOUT: !16 = distinct !DISubprogram(name: "F", linkageName: "_CF.C.Main:I.5d7343568c0b5715.Main.36f6a86118c8cac1", scope: null, file: !3, line: 16, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !17)
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// CHECK:STDOUT: !17 = !{!18}
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// CHECK:STDOUT: !18 = !DILocalVariable(arg: 1, scope: !16, type: !7)
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// CHECK:STDOUT: !19 = !DILocation(line: 16, column: 3, scope: !16)
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