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carbon-lang/toolchain/check/testdata/if_expr/nested.carbon
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Jon Ross-PerkinsandRichard Smith 7ded56ef35 Improve namespace handling in imports. (#4153) 
This implements a few closely related features:

- Starts merging namespaces discovered inside imports.
- Stores results of cross-package name lookup as an entry inside the
scope.
  - Note this is particularly visible with `i32`.
- Moves more of the imported instructions to the import scope.

Note this is primarily for executing the namespace TODO in check.cpp,
which is removed here.
`testdata/namespace/merging_with_indirections.carbon` tests key
behavior.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2024-07-24 19:56:17 +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/nested.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/if_expr/nested.carbon
fn F(a: bool, b: bool, c: bool) -> i32 {
return if a then if b then 1 else 2 else if c then 3 else 4;
}
// CHECK:STDOUT: --- nested.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [template]
// CHECK:STDOUT: %.1: type = tuple_type () [template]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [template]
// CHECK:STDOUT: %Int32.type: type = fn_type @Int32 [template]
// CHECK:STDOUT: %Int32: %Int32.type = struct_value () [template]
// CHECK:STDOUT: %F.type: type = fn_type @F [template]
// CHECK:STDOUT: %F: %F.type = struct_value () [template]
// CHECK:STDOUT: %.2: i32 = int_literal 1 [template]
// CHECK:STDOUT: %.3: i32 = int_literal 2 [template]
// CHECK:STDOUT: %.4: i32 = int_literal 3 [template]
// CHECK:STDOUT: %.5: i32 = int_literal 4 [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT: .Bool = %import_ref.1
// CHECK:STDOUT: .Int32 = %import_ref.2
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/operators
// CHECK:STDOUT: import Core//prelude/types
// CHECK:STDOUT: import Core//prelude/operators/arithmetic
// CHECK:STDOUT: import Core//prelude/operators/bitwise
// CHECK:STDOUT: import Core//prelude/operators/comparison
// CHECK:STDOUT: import Core//prelude/types/bool
// CHECK:STDOUT: }
// CHECK:STDOUT: %import_ref.1: %Bool.type = import_ref Core//prelude/types/bool, inst+2, loaded [template = constants.%Bool]
// CHECK:STDOUT: %import_ref.2: %Int32.type = import_ref Core//prelude/types, inst+4, loaded [template = constants.%Int32]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [template = constants.%F] {
// CHECK:STDOUT: %bool.make_type.loc11_9: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT: %.loc11_9.1: type = value_of_initializer %bool.make_type.loc11_9 [template = bool]
// CHECK:STDOUT: %.loc11_9.2: type = converted %bool.make_type.loc11_9, %.loc11_9.1 [template = bool]
// CHECK:STDOUT: %a.loc11_6.1: bool = param a
// CHECK:STDOUT: @F.%a: bool = bind_name a, %a.loc11_6.1
// CHECK:STDOUT: %bool.make_type.loc11_18: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT: %.loc11_18.1: type = value_of_initializer %bool.make_type.loc11_18 [template = bool]
// CHECK:STDOUT: %.loc11_18.2: type = converted %bool.make_type.loc11_18, %.loc11_18.1 [template = bool]
// CHECK:STDOUT: %b.loc11_15.1: bool = param b
// CHECK:STDOUT: @F.%b: bool = bind_name b, %b.loc11_15.1
// CHECK:STDOUT: %bool.make_type.loc11_27: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT: %.loc11_27.1: type = value_of_initializer %bool.make_type.loc11_27 [template = bool]
// CHECK:STDOUT: %.loc11_27.2: type = converted %bool.make_type.loc11_27, %.loc11_27.1 [template = bool]
// CHECK:STDOUT: %c.loc11_24.1: bool = param c
// CHECK:STDOUT: @F.%c: bool = bind_name c, %c.loc11_24.1
// CHECK:STDOUT: %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc11_36.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT: %.loc11_36.2: type = converted %int.make_type_32, %.loc11_36.1 [template = i32]
// CHECK:STDOUT: @F.%return: ref i32 = var <return slot>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Bool() -> type = "bool.make_type";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Int32() -> type = "int.make_type_32";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%a: bool, %b: bool, %c: bool) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref: bool = name_ref a, %a
// CHECK:STDOUT: if %a.ref br !if.expr.then.loc12_10 else br !if.expr.else.loc12_10
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.then.loc12_10:
// CHECK:STDOUT: %b.ref: bool = name_ref b, %b
// CHECK:STDOUT: if %b.ref br !if.expr.then.loc12_20 else br !if.expr.else.loc12_20
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.then.loc12_20:
// CHECK:STDOUT: %.loc12_30: i32 = int_literal 1 [template = constants.%.2]
// CHECK:STDOUT: br !if.expr.result.loc12_20(%.loc12_30)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.else.loc12_20:
// CHECK:STDOUT: %.loc12_37: i32 = int_literal 2 [template = constants.%.3]
// CHECK:STDOUT: br !if.expr.result.loc12_20(%.loc12_37)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.result.loc12_20:
// CHECK:STDOUT: %.loc12_20: i32 = block_arg !if.expr.result.loc12_20
// CHECK:STDOUT: br !if.expr.result.loc12_10(%.loc12_20)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.else.loc12_10:
// CHECK:STDOUT: %c.ref: bool = name_ref c, %c
// CHECK:STDOUT: if %c.ref br !if.expr.then.loc12_44 else br !if.expr.else.loc12_44
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.then.loc12_44:
// CHECK:STDOUT: %.loc12_54: i32 = int_literal 3 [template = constants.%.4]
// CHECK:STDOUT: br !if.expr.result.loc12_44(%.loc12_54)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.else.loc12_44:
// CHECK:STDOUT: %.loc12_61: i32 = int_literal 4 [template = constants.%.5]
// CHECK:STDOUT: br !if.expr.result.loc12_44(%.loc12_61)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.result.loc12_44:
// CHECK:STDOUT: %.loc12_44: i32 = block_arg !if.expr.result.loc12_44
// CHECK:STDOUT: br !if.expr.result.loc12_10(%.loc12_44)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.result.loc12_10:
// CHECK:STDOUT: %.loc12_10: i32 = block_arg !if.expr.result.loc12_10
// CHECK:STDOUT: return %.loc12_10
// CHECK:STDOUT: }
// CHECK:STDOUT:
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