mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 09:31:04 +01:00
Richard Smith
41ed82e033
Add a `Core.String` class to the prelude representing a string view, and rename the `String` keyword to `str` and make it evaluate to `Core.String`. `Core.String` is represented as a pair of a pointer to a character (actually, to the first character of a string, but we don't have a way of modeling that yet) and a size (which should be pointer-width, but is currently always a `u64` as we don't have a `usize` equivalent yet). `Core.String` values are generated directly by the toolchain for string literal expressions. This follows the direction established at the recent summit, but the design implemented here has not been through the proposal process yet.
87 lines
5.1 KiB
Plaintext
87 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/primitives.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/primitives/numeric_literals.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/primitives/numeric_literals.carbon
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fn F() {
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// 8 and 9 trigger special behavior in APInt when mishandling signed versus
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// unsigned, so we pay extra attention to those.
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var ints: array(i32, 4) = (
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8,
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9,
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0x8,
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0b1000,
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);
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var floats: array(f64, 6) = (
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0.9,
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8.0,
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80.0,
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1.0e7,
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1.0e8,
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1.0e-8,
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);
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}
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// CHECK:STDOUT: ; ModuleID = 'numeric_literals.carbon'
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// CHECK:STDOUT: source_filename = "numeric_literals.carbon"
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// CHECK:STDOUT:
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// CHECK:STDOUT: @array.712.loc16_3 = internal constant [4 x i32] [i32 8, i32 9, i32 8, i32 8]
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// CHECK:STDOUT: @array.6e0.loc22_3 = internal constant [6 x double] [double 9.000000e-01, double 8.000000e+00, double 8.000000e+01, double 1.000000e+07, double 1.000000e+08, double 1.000000e-08]
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// CHECK:STDOUT:
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// CHECK:STDOUT: define void @_CF.Main() !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: %ints.var = alloca [4 x i32], align 4, !dbg !7
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// CHECK:STDOUT: %floats.var = alloca [6 x double], align 8, !dbg !8
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// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %ints.var), !dbg !7
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// CHECK:STDOUT: %.loc21_3.3.array.index = getelementptr inbounds [4 x i32], ptr %ints.var, i32 0, i64 0, !dbg !9
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// CHECK:STDOUT: %.loc21_3.6.array.index = getelementptr inbounds [4 x i32], ptr %ints.var, i32 0, i64 1, !dbg !9
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// CHECK:STDOUT: %.loc21_3.9.array.index = getelementptr inbounds [4 x i32], ptr %ints.var, i32 0, i64 2, !dbg !9
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// CHECK:STDOUT: %.loc21_3.12.array.index = getelementptr inbounds [4 x i32], ptr %ints.var, i32 0, i64 3, !dbg !9
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// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %ints.var, ptr align 4 @array.712.loc16_3, i64 16, i1 false), !dbg !7
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// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %floats.var), !dbg !8
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// CHECK:STDOUT: %.loc29_3.3.array.index = getelementptr inbounds [6 x double], ptr %floats.var, i32 0, i64 0, !dbg !10
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// CHECK:STDOUT: %.loc29_3.6.array.index = getelementptr inbounds [6 x double], ptr %floats.var, i32 0, i64 1, !dbg !10
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// CHECK:STDOUT: %.loc29_3.9.array.index = getelementptr inbounds [6 x double], ptr %floats.var, i32 0, i64 2, !dbg !10
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// CHECK:STDOUT: %.loc29_3.12.array.index = getelementptr inbounds [6 x double], ptr %floats.var, i32 0, i64 3, !dbg !10
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// CHECK:STDOUT: %.loc29_3.15.array.index = getelementptr inbounds [6 x double], ptr %floats.var, i32 0, i64 4, !dbg !10
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// CHECK:STDOUT: %.loc29_3.18.array.index = getelementptr inbounds [6 x double], ptr %floats.var, i32 0, i64 5, !dbg !10
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// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %floats.var, ptr align 8 @array.6e0.loc22_3, i64 48, i1 false), !dbg !8
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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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
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// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #0
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
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// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #1
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// CHECK:STDOUT:
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// CHECK:STDOUT: ; uselistorder directives
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// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 1, 0 }
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// CHECK:STDOUT: uselistorder ptr @llvm.memcpy.p0.p0.i64, { 1, 0 }
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// CHECK:STDOUT:
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// CHECK:STDOUT: attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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// CHECK:STDOUT: attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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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: "numeric_literals.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 13, 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: 16, column: 3, scope: !4)
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// CHECK:STDOUT: !8 = !DILocation(line: 22, column: 3, scope: !4)
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// CHECK:STDOUT: !9 = !DILocation(line: 16, column: 29, scope: !4)
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// CHECK:STDOUT: !10 = !DILocation(line: 22, column: 31, scope: !4)
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// CHECK:STDOUT: !11 = !DILocation(line: 13, column: 1, scope: !4)
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