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Make SemIR::TypeType be an empty FacetType instruction (#7813)

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The type `type` is now a `FacetType` inst with no constraints. This
brings the model implemented in the toolchain into better alignment with
the language design. The `SemIR::TypeType` struct remains as a scope for
holding the `TypeInstId`, `ConstantId`, and `TypeId` constants, but is
not an `InstKind` anymore.

The `TypeType` inst looks a lot like singletons, but there are many
`FacetType` insts so it doesn't quite fit that model. So we put it
alongside singletons with a fixed inst id but refer to it as a more
general "builtin" inst that is not a singleton.
`Namespace::PackageInstId` is similar, and we group it with `TypeType`
conceptually as another builtin instruction with a fixed id.

No conversion is needed anymore to use a `type` as a facet, since types
also have a `FacetType` type. This simplifies and removes a number of
helpers and branches throughout the code.

The `TypeType` inst is now part of the constant store, so we end up
printing it in the constants block in every test. But it's also named
`type` rather than `%type` to preserve the majority of existing
formatting behaviour, though this does look different from other
constants.

Assisted-by: Opus 5 was used to generate a first draft and validate the
refactoring. Though nearly everything non-trivial the tool wrote has
been modified or rewritten.
This commit is contained in:
Dana Jansens
2026-09-22 15:04:40 +00:00
committed by GitHub
parent 83ca5b71e3
commit fcae9610bd
795 changed files with 9505 additions and 8048 deletions
Download Patch File Download Diff File Expand all files Collapse all files
toolchain/lower/testdata/function/generic/call.carbon
Vendored
+3 -3
View File
@@ -59,7 +59,7 @@ fn G() {
// CHECK:STDOUT: call void @_CF.Main.84588f41d61dafba(i32 %.loc27), !dbg !56
// CHECK:STDOUT: %.loc28 = load double, ptr %m.var, align 8, !dbg !57
// CHECK:STDOUT: call void @_CF.Main.073fbce68be6103e(double %.loc28), !dbg !58
// CHECK:STDOUT: call void @_CF.Main.5754c7a55c7cbe4a(%type.26 zeroinitializer), !dbg !59
// CHECK:STDOUT: call void @_CF.Main.99ea8cc237f84c8d(%type.26 zeroinitializer), !dbg !59
// CHECK:STDOUT: call void @"_COp.dc14d4dd21801791:core.Destroy.Core"(ptr %m.var), !dbg !49
// CHECK:STDOUT: call void @"_COp.f58524831c37807e:core.Destroy.Core"(ptr %n.var), !dbg !47
// CHECK:STDOUT: call void @"_COp.a50fd899f969e609:core.Destroy.Core"(ptr %d.var), !dbg !45
@@ -116,7 +116,7 @@ fn G() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.5754c7a55c7cbe4a(%type.26 %_) #0 !dbg !97 {
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.99ea8cc237f84c8d(%type.26 %_) #0 !dbg !97 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret void, !dbg !100
// CHECK:STDOUT: }
@@ -185,7 +185,7 @@ fn G() {
// CHECK:STDOUT: !93 = !DILocalVariable(arg: 1, scope: !92, type: !37)
// CHECK:STDOUT: !95 = !DILocation(line: 13, column: 1, scope: !92)
// CHECK:STDOUT: !96 = !{!93}
// CHECK:STDOUT: !97 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.5754c7a55c7cbe4a", scope: null, file: !32, line: 13, type: !39, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !101)
// CHECK:STDOUT: !97 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.99ea8cc237f84c8d", scope: null, file: !32, line: 13, type: !39, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !101)
// CHECK:STDOUT: !98 = !DILocalVariable(arg: 1, scope: !97, type: !37)
// CHECK:STDOUT: !100 = !DILocation(line: 13, column: 1, scope: !97)
// CHECK:STDOUT: !101 = !{!98}
toolchain/lower/testdata/function/generic/call_basic.carbon
Vendored
+5 -5
View File
@@ -138,7 +138,7 @@ fn M() {
// CHECK:STDOUT: %H.call.loc29 = call i32 @_CH.Main.4d6ceefeb7f772f4(i32 %x), !dbg !94
// CHECK:STDOUT: store i32 %H.call.loc29, ptr %.loc29_6.3.temp, align 4, !dbg !94
// CHECK:STDOUT: call void @"_COp.f58524831c37807e:core.Destroy.Core"(ptr %.loc29_6.3.temp), !dbg !94
// CHECK:STDOUT: %H.call.loc30 = call %type.26 @_CH.Main.71d6c598da8ca542(%type.26 zeroinitializer), !dbg !95
// CHECK:STDOUT: %H.call.loc30 = call %type.26 @_CH.Main.c3359c2c217ad593(%type.26 zeroinitializer), !dbg !95
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc31_8.3.temp), !dbg !97
// CHECK:STDOUT: %G.call = call i32 @_CG.Main.89a3e87df6fdafe1(i32 %x), !dbg !97
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc31_9.3.temp), !dbg !98
@@ -195,7 +195,7 @@ fn M() {
// CHECK:STDOUT: %H.call.loc29 = call double @_CH.Main.c5e4ba542a56b71f(double %x), !dbg !133
// CHECK:STDOUT: store double %H.call.loc29, ptr %.loc29_6.3.temp, align 8, !dbg !133
// CHECK:STDOUT: call void @"_COp.dc14d4dd21801791:core.Destroy.Core"(ptr %.loc29_6.3.temp), !dbg !133
// CHECK:STDOUT: %H.call.loc30 = call %type.26 @_CH.Main.71d6c598da8ca542(%type.26 zeroinitializer), !dbg !134
// CHECK:STDOUT: %H.call.loc30 = call %type.26 @_CH.Main.c3359c2c217ad593(%type.26 zeroinitializer), !dbg !134
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc31_8.3.temp), !dbg !136
// CHECK:STDOUT: %G.call = call double @_CG.Main.38241ddc2cd9d74d(double %x), !dbg !136
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %.loc31_9.3.temp), !dbg !137
@@ -237,7 +237,7 @@ fn M() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr %type.26 @_CH.Main.71d6c598da8ca542(%type.26 %x) #0 !dbg !169 {
// CHECK:STDOUT: define linkonce_odr %type.26 @_CH.Main.c3359c2c217ad593(%type.26 %x) #0 !dbg !169 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret %type.26 %x, !dbg !175
// CHECK:STDOUT: }
@@ -264,7 +264,7 @@ fn M() {
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 18 }
// CHECK:STDOUT: uselistorder ptr @_CH.Main.4d6ceefeb7f772f4, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_CH.Main.71d6c598da8ca542, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_CH.Main.c3359c2c217ad593, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_CH.Main.c5e4ba542a56b71f, { 3, 2, 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_CH.Main.a76b78461416b4a8, { 5, 2, 0, 4, 3, 1 }
// CHECK:STDOUT: uselistorder ptr @_CH.Main.42513763e01cba2c, { 1, 0 }
@@ -375,7 +375,7 @@ fn M() {
// CHECK:STDOUT: !162 = !DILocalVariable(arg: 1, scope: !161, type: !34)
// CHECK:STDOUT: !167 = !DILocation(line: 23, column: 3, scope: !161)
// CHECK:STDOUT: !168 = !{!162}
// CHECK:STDOUT: !169 = distinct !DISubprogram(name: "H", linkageName: "_CH.Main.71d6c598da8ca542", scope: null, file: !32, line: 22, type: !37, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !176)
// CHECK:STDOUT: !169 = distinct !DISubprogram(name: "H", linkageName: "_CH.Main.c3359c2c217ad593", scope: null, file: !32, line: 22, type: !37, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !176)
// CHECK:STDOUT: !170 = !DILocalVariable(arg: 1, scope: !169, type: !35)
// CHECK:STDOUT: !175 = !DILocation(line: 23, column: 3, scope: !169)
// CHECK:STDOUT: !176 = !{!170}
toolchain/lower/testdata/function/generic/call_deref_ptr.carbon
Vendored
+5 -5
View File
@@ -80,7 +80,7 @@ fn M() {
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.89a3e87df6fdafe1(ptr %x) #0 !dbg !60 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %A.call = call %type.26 @_CA.Main.71d6c598da8ca542(%type.26 zeroinitializer), !dbg !63
// CHECK:STDOUT: %A.call = call %type.26 @_CA.Main.c3359c2c217ad593(%type.26 zeroinitializer), !dbg !63
// CHECK:STDOUT: call void @_CB.Main.89a3e87df6fdafe1(ptr %x), !dbg !67
// CHECK:STDOUT: ret void, !dbg !68
// CHECK:STDOUT: }
@@ -88,13 +88,13 @@ fn M() {
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.38241ddc2cd9d74d(ptr %x) #0 !dbg !70 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %A.call = call %type.26 @_CA.Main.71d6c598da8ca542(%type.26 zeroinitializer), !dbg !73
// CHECK:STDOUT: %A.call = call %type.26 @_CA.Main.c3359c2c217ad593(%type.26 zeroinitializer), !dbg !73
// CHECK:STDOUT: call void @_CB.Main.38241ddc2cd9d74d(ptr %x), !dbg !75
// CHECK:STDOUT: ret void, !dbg !76
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr %type.26 @_CA.Main.71d6c598da8ca542(%type.26 %x) #0 !dbg !78 {
// CHECK:STDOUT: define linkonce_odr %type.26 @_CA.Main.c3359c2c217ad593(%type.26 %x) #0 !dbg !78 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret %type.26 %x, !dbg !84
// CHECK:STDOUT: }
@@ -137,7 +137,7 @@ fn M() {
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 0, 1, 3, 2 }
// CHECK:STDOUT: uselistorder ptr @_CA.Main.71d6c598da8ca542, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_CA.Main.c3359c2c217ad593, { 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
@@ -187,7 +187,7 @@ fn M() {
// CHECK:STDOUT: !75 = !DILocation(line: 32, column: 3, scope: !70)
// CHECK:STDOUT: !76 = !DILocation(line: 30, column: 1, scope: !70)
// CHECK:STDOUT: !77 = !{!71}
// CHECK:STDOUT: !78 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.71d6c598da8ca542", scope: null, file: !32, line: 18, type: !65, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !85)
// CHECK:STDOUT: !78 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.c3359c2c217ad593", scope: null, file: !32, line: 18, type: !65, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !85)
// CHECK:STDOUT: !79 = !DILocalVariable(arg: 1, scope: !78, type: !39)
// CHECK:STDOUT: !84 = !DILocation(line: 19, column: 3, scope: !78)
// CHECK:STDOUT: !85 = !{!79}
toolchain/lower/testdata/function/generic/call_different_specific.carbon
Vendored
+5 -5
View File
@@ -73,7 +73,7 @@ fn M(ptr_i32: i32*, ptr_f64: f64*) {
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.89a3e87df6fdafe1(ptr %x) #0 !dbg !33 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %A.call = call %type.0 @_CA.Main.71d6c598da8ca542(%type.0 zeroinitializer), !dbg !36
// CHECK:STDOUT: %A.call = call %type.0 @_CA.Main.c3359c2c217ad593(%type.0 zeroinitializer), !dbg !36
// CHECK:STDOUT: call void @_CB.Main.89a3e87df6fdafe1(ptr %x), !dbg !40
// CHECK:STDOUT: ret void, !dbg !41
// CHECK:STDOUT: }
@@ -81,13 +81,13 @@ fn M(ptr_i32: i32*, ptr_f64: f64*) {
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr void @_CF.Main.38241ddc2cd9d74d(ptr %x) #0 !dbg !43 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %A.call = call %type.0 @_CA.Main.71d6c598da8ca542(%type.0 zeroinitializer), !dbg !46
// CHECK:STDOUT: %A.call = call %type.0 @_CA.Main.c3359c2c217ad593(%type.0 zeroinitializer), !dbg !46
// CHECK:STDOUT: call void @_CB.Main.38241ddc2cd9d74d(ptr %x), !dbg !48
// CHECK:STDOUT: ret void, !dbg !49
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr %type.0 @_CA.Main.71d6c598da8ca542(%type.0 %x) #0 !dbg !51 {
// CHECK:STDOUT: define linkonce_odr %type.0 @_CA.Main.c3359c2c217ad593(%type.0 %x) #0 !dbg !51 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret %type.0 %x, !dbg !57
// CHECK:STDOUT: }
@@ -132,7 +132,7 @@ fn M(ptr_i32: i32*, ptr_f64: f64*) {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder ptr @_CA.Main.71d6c598da8ca542, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @_CA.Main.c3359c2c217ad593, { 1, 0 }
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
@@ -182,7 +182,7 @@ fn M(ptr_i32: i32*, ptr_f64: f64*) {
// CHECK:STDOUT: !48 = !DILocation(line: 39, column: 3, scope: !43)
// CHECK:STDOUT: !49 = !DILocation(line: 37, column: 1, scope: !43)
// CHECK:STDOUT: !50 = !{!44}
// CHECK:STDOUT: !51 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.71d6c598da8ca542", scope: null, file: !4, line: 25, type: !38, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !58)
// CHECK:STDOUT: !51 = distinct !DISubprogram(name: "A", linkageName: "_CA.Main.c3359c2c217ad593", scope: null, file: !4, line: 25, type: !38, spFlags: DISPFlagDefinition, unit: !5, retainedNodes: !58)
// CHECK:STDOUT: !52 = !DILocalVariable(arg: 1, scope: !51, type: !7)
// CHECK:STDOUT: !57 = !DILocation(line: 26, column: 3, scope: !51)
// CHECK:STDOUT: !58 = !{!52}
toolchain/lower/testdata/function/generic/call_specific_in_class.carbon
Vendored
+9 -9
View File
@@ -86,7 +86,7 @@ fn M() {
// CHECK:STDOUT: %.loc42_5 = load double, ptr %var_f64.var, align 8, !dbg !69
// CHECK:STDOUT: %F.call.loc42 = call double @_CF.Main.c5e4ba542a56b71f(double %.loc42_5), !dbg !70
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %_.var), !dbg !71
// CHECK:STDOUT: %F.call.loc44 = call %type.26 @_CF.Main.71d6c598da8ca542(%type.26 zeroinitializer), !dbg !73
// CHECK:STDOUT: %F.call.loc44 = call %type.26 @_CF.Main.c3359c2c217ad593(%type.26 zeroinitializer), !dbg !73
// CHECK:STDOUT: call void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr %_.var), !dbg !71
// CHECK:STDOUT: call void @"_COp.dc14d4dd21801791:core.Destroy.Core"(ptr %var_f64.var), !dbg !67
// CHECK:STDOUT: call void @"_COp.f58524831c37807e:core.Destroy.Core"(ptr %var_i32.var), !dbg !61
@@ -130,9 +130,9 @@ fn M() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr %type.26 @_CF.Main.71d6c598da8ca542(%type.26 %x) #0 !dbg !128 {
// CHECK:STDOUT: define linkonce_odr %type.26 @_CF.Main.c3359c2c217ad593(%type.26 %x) #0 !dbg !128 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %G.call = call %type.26 @_CG.Main.71d6c598da8ca542(%type.26 %x), !dbg !134
// CHECK:STDOUT: %G.call = call %type.26 @_CG.Main.c3359c2c217ad593(%type.26 %x), !dbg !134
// CHECK:STDOUT: ret %type.26 %G.call, !dbg !135
// CHECK:STDOUT: }
// CHECK:STDOUT:
@@ -167,11 +167,11 @@ fn M() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr %type.26 @_CG.Main.71d6c598da8ca542(%type.26 %x) #0 !dbg !196 {
// CHECK:STDOUT: define linkonce_odr %type.26 @_CG.Main.c3359c2c217ad593(%type.26 %x) #0 !dbg !196 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %c.var = alloca {}, align 1, !dbg !201
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %c.var), !dbg !201
// CHECK:STDOUT: %C.Cfn.call = call %type.26 @_CCfn.C.Main.71d6c598da8ca542(ptr %c.var, %type.26 %x), !dbg !203
// CHECK:STDOUT: %C.Cfn.call = call %type.26 @_CCfn.C.Main.c3359c2c217ad593(ptr %c.var, %type.26 %x), !dbg !203
// CHECK:STDOUT: call void @"_COp.08d9e38b928ba575:core.Destroy.Core"(ptr %c.var), !dbg !201
// CHECK:STDOUT: ret %type.26 %C.Cfn.call, !dbg !205
// CHECK:STDOUT: }
@@ -195,7 +195,7 @@ fn M() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define linkonce_odr %type.26 @_CCfn.C.Main.71d6c598da8ca542(ptr %self, %type.26 %x) #0 !dbg !257 {
// CHECK:STDOUT: define linkonce_odr %type.26 @_CCfn.C.Main.c3359c2c217ad593(ptr %self, %type.26 %x) #0 !dbg !257 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: ret %type.26 %x, !dbg !265
// CHECK:STDOUT: }
@@ -272,7 +272,7 @@ fn M() {
// CHECK:STDOUT: !125 = !DILocation(line: 29, column: 10, scope: !119)
// CHECK:STDOUT: !126 = !DILocation(line: 29, column: 3, scope: !119)
// CHECK:STDOUT: !127 = !{!120}
// CHECK:STDOUT: !128 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.71d6c598da8ca542", scope: null, file: !32, line: 28, type: !52, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !136)
// CHECK:STDOUT: !128 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main.c3359c2c217ad593", scope: null, file: !32, line: 28, type: !52, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !136)
// CHECK:STDOUT: !129 = !DILocalVariable(arg: 1, scope: !128, type: !35)
// CHECK:STDOUT: !134 = !DILocation(line: 29, column: 10, scope: !128)
// CHECK:STDOUT: !135 = !DILocation(line: 29, column: 3, scope: !128)
@@ -299,7 +299,7 @@ fn M() {
// CHECK:STDOUT: !192 = !DILocation(line: 25, column: 10, scope: !185)
// CHECK:STDOUT: !194 = !DILocation(line: 25, column: 3, scope: !185)
// CHECK:STDOUT: !195 = !{!186}
// CHECK:STDOUT: !196 = distinct !DISubprogram(name: "G", linkageName: "_CG.Main.71d6c598da8ca542", scope: null, file: !32, line: 23, type: !52, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !206)
// CHECK:STDOUT: !196 = distinct !DISubprogram(name: "G", linkageName: "_CG.Main.c3359c2c217ad593", scope: null, file: !32, line: 23, type: !52, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !206)
// CHECK:STDOUT: !197 = !DILocalVariable(arg: 1, scope: !196, type: !35)
// CHECK:STDOUT: !201 = !DILocation(line: 24, column: 3, scope: !196)
// CHECK:STDOUT: !203 = !DILocation(line: 25, column: 10, scope: !196)
@@ -320,7 +320,7 @@ fn M() {
// CHECK:STDOUT: !249 = !DILocalVariable(arg: 2, scope: !247, type: !35)
// CHECK:STDOUT: !255 = !DILocation(line: 19, column: 5, scope: !247)
// CHECK:STDOUT: !256 = !{!248, !249}
// CHECK:STDOUT: !257 = distinct !DISubprogram(name: "Cfn", linkageName: "_CCfn.C.Main.71d6c598da8ca542", scope: null, file: !32, line: 18, type: !147, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !266)
// CHECK:STDOUT: !257 = distinct !DISubprogram(name: "Cfn", linkageName: "_CCfn.C.Main.c3359c2c217ad593", scope: null, file: !32, line: 18, type: !147, spFlags: DISPFlagDefinition, unit: !33, retainedNodes: !266)
// CHECK:STDOUT: !258 = !DILocalVariable(arg: 1, scope: !257, type: !35)
// CHECK:STDOUT: !259 = !DILocalVariable(arg: 2, scope: !257, type: !35)
// CHECK:STDOUT: !265 = !DILocation(line: 19, column: 5, scope: !257)