mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 16:11:06 +01:00
Richard Smith
5b884ae14d
- Track the `VarPattern` instruction on the `VarStorage` instruction so that it's available for name mangling. - Mangle global variables based on the first binding name within their pattern. - Give global variables external rather than internal linkage, except if they have no bindings whatsoever in their pattern. - To support lowering references to bindings nested within a global var, such as for `var (x: i32, b: i32)`, add some basic initial support for reference constant expressions. Treat a global `var` as a reference constant, and treat an aggregate access into a reference constant as a reference constant.
50 lines
2.5 KiB
Plaintext
50 lines
2.5 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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// 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/global/simple_with_fun.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/global/simple_with_fun.carbon
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fn test_a() -> i32 {
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return 0;
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}
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var a: i32 = test_a();
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// CHECK:STDOUT: ; ModuleID = 'simple_with_fun.carbon'
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// CHECK:STDOUT: source_filename = "simple_with_fun.carbon"
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// CHECK:STDOUT:
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// CHECK:STDOUT: @_Ca.Main = global i32 0
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// CHECK:STDOUT: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 0, ptr @_C__global_init.Main, ptr null }]
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// CHECK:STDOUT:
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// CHECK:STDOUT: define i32 @_Ctest_a.Main() !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: ret i32 0, !dbg !7
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_C__global_init.Main() !dbg !8 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %test_a.call = call i32 @_Ctest_a.Main(), !dbg !9
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// CHECK:STDOUT: store i32 %test_a.call, ptr @_Ca.Main, align 4, !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: !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, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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// CHECK:STDOUT: !3 = !DIFile(filename: "simple_with_fun.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "test_a", linkageName: "_Ctest_a.Main", scope: null, file: !3, line: 11, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
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// CHECK:STDOUT: !6 = !{}
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// CHECK:STDOUT: !7 = !DILocation(line: 12, column: 3, scope: !4)
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// CHECK:STDOUT: !8 = distinct !DISubprogram(name: "__global_init", linkageName: "_C__global_init.Main", scope: null, file: !3, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !9 = !DILocation(line: 15, column: 14, scope: !8)
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// CHECK:STDOUT: !10 = !DILocation(line: 15, column: 1, scope: !8)
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// CHECK:STDOUT: !11 = !DILocation(line: 0, scope: !8)
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