mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Geoff RomerandJon Ross-Perkins
dc32aa2690
Introduces the `BindingPattern` and `SymbolicBindingPattern` insts, and a separate stack of pattern blocks that they are emitted into. The intent is to generate the corresponding pattern-matching insts (like `BindName`) from them in a separate pass, but that is deferred to future PRs. See [here](https://docs.google.com/document/d/1U_vQH17V893J9aF1LJXUnFYBNSs2MjKl4bJPaWCB2zo/edit?usp=sharing&resourcekey=0-w0xGYZ0An31Kpz-wvzSXwQ) for the design this is based on, but note that during review we have chosen to deviate from that design by putting the patterns in separate blocks, and omitting the "forward references" from a `BindingPattern` to its corresponding `BindName`. This in turn necessitates having separate inst kinds for symbolic and non-symbolic binding patterns. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
82 lines
3.8 KiB
Plaintext
82 lines
3.8 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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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/array/generic_empty.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/check/testdata/array/generic_empty.carbon
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fn G(T:! type) {
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// We can initialize this without knowing T.
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var arr: [T; 0] = ();
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}
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// CHECK:STDOUT: --- generic_empty.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %T: type = bind_symbolic_name T 0 [symbolic]
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// CHECK:STDOUT: %G.type: type = fn_type @G [template]
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// CHECK:STDOUT: %.1: type = tuple_type () [template]
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// CHECK:STDOUT: %G: %G.type = struct_value () [template]
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// CHECK:STDOUT: %.2: i32 = int_literal 0 [template]
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// CHECK:STDOUT: %.3: type = array_type %.2, %T [symbolic]
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// CHECK:STDOUT: %.4: type = ptr_type %.3 [symbolic]
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// CHECK:STDOUT: %array: %.3 = tuple_value () [symbolic]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
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// CHECK:STDOUT: import Core//prelude
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// CHECK:STDOUT: import Core//prelude/operators
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// CHECK:STDOUT: import Core//prelude/types
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// CHECK:STDOUT: import Core//prelude/operators/arithmetic
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// CHECK:STDOUT: import Core//prelude/operators/as
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// CHECK:STDOUT: import Core//prelude/operators/bitwise
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// CHECK:STDOUT: import Core//prelude/operators/comparison
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// CHECK:STDOUT: import Core//prelude/types/bool
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// CHECK:STDOUT: }
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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: .Core = imports.%Core
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// CHECK:STDOUT: .G = %G.decl
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import = import Core
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// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [template = constants.%G] {
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// CHECK:STDOUT: %T.patt: type = symbolic_binding_pattern T 0
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %T.param: type = param T, runtime_param<invalid>
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// CHECK:STDOUT: %T.loc11: type = bind_symbolic_name T 0, %T.param [symbolic = %T.1 (constants.%T)]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: generic fn @G(%T.loc11: type) {
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// CHECK:STDOUT: %T.1: type = bind_symbolic_name T 0 [symbolic = %T.1 (constants.%T)]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !definition:
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// CHECK:STDOUT: %.1: type = array_type constants.%.2, @G.%T.1 (%T) [symbolic = %.1 (constants.%.3)]
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// CHECK:STDOUT: %array: @G.%.1 (%.3) = tuple_value () [symbolic = %array (constants.%array)]
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn(%T.loc11: type) {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %T.ref: type = name_ref T, %T.loc11 [symbolic = %T.1 (constants.%T)]
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// CHECK:STDOUT: %.loc13_16: i32 = int_literal 0 [template = constants.%.2]
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// CHECK:STDOUT: %.loc13_17: type = array_type %.loc13_16, %T [symbolic = %.1 (constants.%.3)]
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// CHECK:STDOUT: %arr.var: ref @G.%.1 (%.3) = var arr
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// CHECK:STDOUT: %arr: ref @G.%.1 (%.3) = bind_name arr, %arr.var
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// CHECK:STDOUT: %.loc13_22.1: %.1 = tuple_literal ()
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// CHECK:STDOUT: %.loc13_22.2: init @G.%.1 (%.3) = array_init () to %arr.var [symbolic = %array (constants.%array)]
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// CHECK:STDOUT: %.loc13_23: init @G.%.1 (%.3) = converted %.loc13_22.1, %.loc13_22.2 [symbolic = %array (constants.%array)]
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// CHECK:STDOUT: assign %arr.var, %.loc13_23
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: specific @G(constants.%T) {
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// CHECK:STDOUT: %T.1 => constants.%T
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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