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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
dd7cfdb149
Implement the alias rules from proposal #5389, wherein an alias is permitted so long as the target has a constant value. While that proposal is not yet accepted, this seems like a reasonable basis for further iteration, and will be useful for the examples we're currently pursuing.
60 lines
2.8 KiB
Plaintext
60 lines
2.8 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/int.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/alias/var.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/alias/var.carbon
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var a: i32 = 0;
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fn F() -> i32 {
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alias b = a;
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return b;
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}
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// CHECK:STDOUT: ; ModuleID = 'var.carbon'
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// CHECK:STDOUT: source_filename = "var.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: ; Function Attrs: nounwind
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// CHECK:STDOUT: define i32 @_CF.Main() #0 !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %.loc17 = load i32, ptr @_Ca.Main, align 4, !dbg !8
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// CHECK:STDOUT: ret i32 %.loc17, !dbg !9
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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 internal void @_C__global_init.Main() #0 !dbg !10 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: store i32 0, ptr @_Ca.Main, align 4, !dbg !13
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// CHECK:STDOUT: ret void, !dbg !14
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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: "var.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 15, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
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// CHECK:STDOUT: !6 = !{!7}
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// CHECK:STDOUT: !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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// CHECK:STDOUT: !8 = !DILocation(line: 17, column: 10, scope: !4)
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// CHECK:STDOUT: !9 = !DILocation(line: 17, column: 3, scope: !4)
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// CHECK:STDOUT: !10 = distinct !DISubprogram(name: "__global_init", linkageName: "_C__global_init.Main", scope: null, file: !3, type: !11, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !11 = !DISubroutineType(types: !12)
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// CHECK:STDOUT: !12 = !{null}
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// CHECK:STDOUT: !13 = !DILocation(line: 13, column: 1, scope: !10)
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// CHECK:STDOUT: !14 = !DILocation(line: 0, scope: !10)
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