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carbon-lang/toolchain/check/testdata/if_expr/control_flow.carbon
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josh11bJosh LRichard Smith
 67f2c9ce26 Add a FacetValue instruction (#4545) 
The new `FacetValue` instruction represents `C as I` for some type `C`
and facet type `I`. It is named `FacetValue` instead of just `Facet` to
parallel the `FacetType` instruction.

This PR uses this instruction represent the facet value `Self` in an
`impl` declaration. This instruction will be used in the future to also
support things like:

* `C as I` where `C` is a class; and
* forming a specific for a generic with a `T:! I` parameter where `T` is
being given a concrete value.

(Here `I` is an interface or other non-`type` facet type.)

Also do some renaming and add some comments to make things a bit more
clear.

* `FacetTypeAccess` -> `FacetAccessType` to clarify this is not access
of a facet type, but access of the type of a facet
* `.facet_id` -> `.facet_value_inst_id` to parallel the `FacetValue`
instruction

`FacetAccessWitness` will be in a future PR.

---------

Co-authored-by: Josh L <josh11b@users.noreply.github.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2024-11-21 22:29:53 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/if_expr/control_flow.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/if_expr/control_flow.carbon
fn A() -> i32 { return 1; }
fn B() -> i32 { return 2; }
fn F(b: bool) -> i32 {
return if b then A() else B();
}
// CHECK:STDOUT: --- control_flow.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %.1: Core.IntLiteral = int_value 32 [template]
// CHECK:STDOUT: %Int.type: type = fn_type @Int [template]
// CHECK:STDOUT: %Int: %Int.type = struct_value () [template]
// CHECK:STDOUT: %i32: type = int_type signed, %.1 [template]
// CHECK:STDOUT: %A.type: type = fn_type @A [template]
// CHECK:STDOUT: %A: %A.type = struct_value () [template]
// CHECK:STDOUT: %.2: Core.IntLiteral = int_value 1 [template]
// CHECK:STDOUT: %Convert.type.2: type = fn_type @Convert.1, @ImplicitAs(%i32) [template]
// CHECK:STDOUT: %Convert.type.14: type = fn_type @Convert.2, @impl.1(%.1) [template]
// CHECK:STDOUT: %Convert.14: %Convert.type.14 = struct_value () [template]
// CHECK:STDOUT: %.26: <witness> = interface_witness (%Convert.14) [template]
// CHECK:STDOUT: %.27: <bound method> = bound_method %.2, %Convert.14 [template]
// CHECK:STDOUT: %.28: <specific function> = specific_function %.27, @Convert.2(%.1) [template]
// CHECK:STDOUT: %.29: %i32 = int_value 1 [template]
// CHECK:STDOUT: %B.type: type = fn_type @B [template]
// CHECK:STDOUT: %B: %B.type = struct_value () [template]
// CHECK:STDOUT: %.30: Core.IntLiteral = int_value 2 [template]
// CHECK:STDOUT: %.31: <bound method> = bound_method %.30, %Convert.14 [template]
// CHECK:STDOUT: %.32: <specific function> = specific_function %.31, @Convert.2(%.1) [template]
// CHECK:STDOUT: %.33: %i32 = int_value 2 [template]
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [template]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [template]
// CHECK:STDOUT: %F.type: type = fn_type @F [template]
// CHECK:STDOUT: %F: %F.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT: .Int = %import_ref.1
// CHECK:STDOUT: .ImplicitAs = %import_ref.2
// CHECK:STDOUT: .Bool = %import_ref.38
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .A = %A.decl
// CHECK:STDOUT: .B = %B.decl
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %A.decl: %A.type = fn_decl @A [template = constants.%A] {
// CHECK:STDOUT: %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc11_11.1: Core.IntLiteral = int_value 32 [template = constants.%.1]
// CHECK:STDOUT: %int.make_type_signed: init type = call constants.%Int(%.loc11_11.1) [template = constants.%i32]
// CHECK:STDOUT: %.loc11_11.2: type = value_of_initializer %int.make_type_signed [template = constants.%i32]
// CHECK:STDOUT: %.loc11_11.3: type = converted %int.make_type_signed, %.loc11_11.2 [template = constants.%i32]
// CHECK:STDOUT: %return.param: ref %i32 = out_param runtime_param0
// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %B.decl: %B.type = fn_decl @B [template = constants.%B] {
// CHECK:STDOUT: %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc12_11.1: Core.IntLiteral = int_value 32 [template = constants.%.1]
// CHECK:STDOUT: %int.make_type_signed: init type = call constants.%Int(%.loc12_11.1) [template = constants.%i32]
// CHECK:STDOUT: %.loc12_11.2: type = value_of_initializer %int.make_type_signed [template = constants.%i32]
// CHECK:STDOUT: %.loc12_11.3: type = converted %int.make_type_signed, %.loc12_11.2 [template = constants.%i32]
// CHECK:STDOUT: %return.param: ref %i32 = out_param runtime_param0
// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [template = constants.%F] {
// CHECK:STDOUT: %b.patt: bool = binding_pattern b
// CHECK:STDOUT: %b.param_patt: bool = value_param_pattern %b.patt, runtime_param0
// CHECK:STDOUT: %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: %i32 = out_param_pattern %return.patt, runtime_param1
// CHECK:STDOUT: } {
// CHECK:STDOUT: %bool.make_type: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT: %.loc14_9.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT: %.loc14_9.2: type = converted %bool.make_type, %.loc14_9.1 [template = bool]
// CHECK:STDOUT: %.loc14_18.1: Core.IntLiteral = int_value 32 [template = constants.%.1]
// CHECK:STDOUT: %int.make_type_signed: init type = call constants.%Int(%.loc14_18.1) [template = constants.%i32]
// CHECK:STDOUT: %.loc14_18.2: type = value_of_initializer %int.make_type_signed [template = constants.%i32]
// CHECK:STDOUT: %.loc14_18.3: type = converted %int.make_type_signed, %.loc14_18.2 [template = constants.%i32]
// CHECK:STDOUT: %b.param: bool = value_param runtime_param0
// CHECK:STDOUT: %b: bool = bind_name b, %b.param
// CHECK:STDOUT: %return.param: ref %i32 = out_param runtime_param1
// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A() -> %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %.loc11_24: Core.IntLiteral = int_value 1 [template = constants.%.2]
// CHECK:STDOUT: %.loc11_25.1: %Convert.type.2 = interface_witness_access constants.%.26, element0 [template = constants.%Convert.14]
// CHECK:STDOUT: %.loc11_25.2: <bound method> = bound_method %.loc11_24, %.loc11_25.1 [template = constants.%.27]
// CHECK:STDOUT: %.loc11_25.3: <specific function> = specific_function %.loc11_25.2, @Convert.2(constants.%.1) [template = constants.%.28]
// CHECK:STDOUT: %int.convert_checked: init %i32 = call %.loc11_25.3(%.loc11_24) [template = constants.%.29]
// CHECK:STDOUT: %.loc11_25.4: %i32 = value_of_initializer %int.convert_checked [template = constants.%.29]
// CHECK:STDOUT: %.loc11_25.5: %i32 = converted %.loc11_24, %.loc11_25.4 [template = constants.%.29]
// CHECK:STDOUT: return %.loc11_25.5
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @B() -> %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %.loc12_24: Core.IntLiteral = int_value 2 [template = constants.%.30]
// CHECK:STDOUT: %.loc12_25.1: %Convert.type.2 = interface_witness_access constants.%.26, element0 [template = constants.%Convert.14]
// CHECK:STDOUT: %.loc12_25.2: <bound method> = bound_method %.loc12_24, %.loc12_25.1 [template = constants.%.31]
// CHECK:STDOUT: %.loc12_25.3: <specific function> = specific_function %.loc12_25.2, @Convert.2(constants.%.1) [template = constants.%.32]
// CHECK:STDOUT: %int.convert_checked: init %i32 = call %.loc12_25.3(%.loc12_24) [template = constants.%.33]
// CHECK:STDOUT: %.loc12_25.4: %i32 = value_of_initializer %int.convert_checked [template = constants.%.33]
// CHECK:STDOUT: %.loc12_25.5: %i32 = converted %.loc12_24, %.loc12_25.4 [template = constants.%.33]
// CHECK:STDOUT: return %.loc12_25.5
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%b.param_patt: bool) -> %i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %b.ref: bool = name_ref b, %b
// CHECK:STDOUT: if %b.ref br !if.expr.then else br !if.expr.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.then:
// CHECK:STDOUT: %A.ref: %A.type = name_ref A, file.%A.decl [template = constants.%A]
// CHECK:STDOUT: %A.call: init %i32 = call %A.ref()
// CHECK:STDOUT: %.loc15_21.1: %i32 = value_of_initializer %A.call
// CHECK:STDOUT: %.loc15_21.2: %i32 = converted %A.call, %.loc15_21.1
// CHECK:STDOUT: br !if.expr.result(%.loc15_21.2)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.else:
// CHECK:STDOUT: %B.ref: %B.type = name_ref B, file.%B.decl [template = constants.%B]
// CHECK:STDOUT: %B.call: init %i32 = call %B.ref()
// CHECK:STDOUT: %.loc15_24.1: %i32 = value_of_initializer %B.call
// CHECK:STDOUT: %.loc15_24.2: %i32 = converted %B.call, %.loc15_24.1
// CHECK:STDOUT: br !if.expr.result(%.loc15_24.2)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.result:
// CHECK:STDOUT: %.loc15_10: %i32 = block_arg !if.expr.result
// CHECK:STDOUT: return %.loc15_10
// CHECK:STDOUT: }
// CHECK:STDOUT:
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