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https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard Smith
f0e940ddfd
For now, a builtin function is defined by specifying a string literal initializer in a function declaration: ```carbon fn MyBuiltin(a: i32) -> i32 = "builtin.name"; ``` End-to-end support is included for a sample `"int.add"` builtin performing integer addition, covering constant evaluation and code generation. The implementation here needs substantial refactoring before we'll be ready to start adding more builtins. That refactoring work will be coming next. This change is aiming to checkpoint some incremental progress.
44 lines
1.8 KiB
Plaintext
44 lines
1.8 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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// AUTOUPDATE
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fn Add(a: i32, b: i32) -> i32 = "int.add";
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var arr: [i32; Add(1, 2)];
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// CHECK:STDOUT: --- call.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %.1: i32 = int_literal 1 [template]
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// CHECK:STDOUT: %.2: i32 = int_literal 2 [template]
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// CHECK:STDOUT: %.3: i32 = int_literal 3 [template]
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// CHECK:STDOUT: %.4: type = array_type %.3, i32 [template]
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// CHECK:STDOUT: %.5: type = ptr_type [i32; 3] [template]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: package: <namespace> = namespace [template] {
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// CHECK:STDOUT: .Add = %Add
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// CHECK:STDOUT: .arr = %arr
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Add: <function> = fn_decl @Add [template] {
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// CHECK:STDOUT: %a.loc7_8.1: i32 = param a
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// CHECK:STDOUT: @Add.%a: i32 = bind_name a, %a.loc7_8.1
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// CHECK:STDOUT: %b.loc7_16.1: i32 = param b
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// CHECK:STDOUT: @Add.%b: i32 = bind_name b, %b.loc7_16.1
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// CHECK:STDOUT: %return.var: ref i32 = var <return slot>
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Add.ref: <function> = name_ref Add, %Add [template = %Add]
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// CHECK:STDOUT: %.loc9_20: i32 = int_literal 1 [template = constants.%.1]
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// CHECK:STDOUT: %.loc9_23: i32 = int_literal 2 [template = constants.%.2]
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// CHECK:STDOUT: %.loc9_19: init i32 = call %Add.ref(%.loc9_20, %.loc9_23) [template = constants.%.3]
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// CHECK:STDOUT: %.loc9_25: type = array_type %.loc9_19, i32 [template = constants.%.4]
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// CHECK:STDOUT: %arr.var: ref [i32; 3] = var arr
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// CHECK:STDOUT: %arr: ref [i32; 3] = bind_name arr, %arr.var
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Add(%a: i32, %b: i32) -> i32 = "int.add";
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// CHECK:STDOUT:
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