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carbon-lang/toolchain/check/testdata/if/fail_reachable_fallthrough.carbon
T
Richard Smith bc395eb889 Represent integer literals as IntLiteral not as i32. (#4532) 
When an `IntLiteral` appears as an operand of an `if` expression,
convert it to `i32` for now, so that we don't reject things like `if
cond then 1 else 2` due to having a non-constant value of type
`IntLiteral`.

For tuple indexing expressions such as `(a, b).0`, convert the index to
type `IntLiteral`, not to type `i32`. This isn't strictly necessary to
do in this PR, but avoids the need to provide an `IntLiteral` -> `i32`
implicit conversion for `no_prelude` tests using this syntax.
2024-11-15 23:24:15 +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/fail_reachable_fallthrough.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/if/fail_reachable_fallthrough.carbon
fn If1(b: bool) -> i32 {
if (b) {
return 1;
} else {
}
// CHECK:STDERR: fail_reachable_fallthrough.carbon:[[@LINE+4]]:1: error: missing `return` at end of function with declared return type [MissingReturnStatement]
// CHECK:STDERR: }
// CHECK:STDERR: ^
// CHECK:STDERR:
}
fn If2(b: bool) -> i32 {
if (b) {
} else {
return 2;
}
// CHECK:STDERR: fail_reachable_fallthrough.carbon:[[@LINE+4]]:1: error: missing `return` at end of function with declared return type [MissingReturnStatement]
// CHECK:STDERR: }
// CHECK:STDERR: ^
// CHECK:STDERR:
}
fn If3(b: bool) -> i32 {
if (b) {
return 1;
}
// CHECK:STDERR: fail_reachable_fallthrough.carbon:[[@LINE+3]]:1: error: missing `return` at end of function with declared return type [MissingReturnStatement]
// CHECK:STDERR: }
// CHECK:STDERR: ^
}
// CHECK:STDOUT: --- fail_reachable_fallthrough.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [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: %If1.type: type = fn_type @If1 [template]
// CHECK:STDOUT: %If1: %If1.type = struct_value () [template]
// CHECK:STDOUT: %.1: Core.IntLiteral = int_value 1 [template]
// CHECK:STDOUT: %Convert.type.2: type = fn_type @Convert.1, @ImplicitAs(i32) [template]
// CHECK:STDOUT: %Convert.type.15: type = fn_type @Convert.11 [template]
// CHECK:STDOUT: %Convert.15: %Convert.type.15 = struct_value () [template]
// CHECK:STDOUT: %.25: <witness> = interface_witness (%Convert.15) [template]
// CHECK:STDOUT: %.26: <bound method> = bound_method %.1, %Convert.15 [template]
// CHECK:STDOUT: %.27: i32 = int_value 1 [template]
// CHECK:STDOUT: %If2.type: type = fn_type @If2 [template]
// CHECK:STDOUT: %If2: %If2.type = struct_value () [template]
// CHECK:STDOUT: %.28: Core.IntLiteral = int_value 2 [template]
// CHECK:STDOUT: %.29: <bound method> = bound_method %.28, %Convert.15 [template]
// CHECK:STDOUT: %.30: i32 = int_value 2 [template]
// CHECK:STDOUT: %If3.type: type = fn_type @If3 [template]
// CHECK:STDOUT: %If3: %If3.type = struct_value () [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: .ImplicitAs = %import_ref.3
// 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: .If1 = %If1.decl
// CHECK:STDOUT: .If2 = %If2.decl
// CHECK:STDOUT: .If3 = %If3.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %If1.decl: %If1.type = fn_decl @If1 [template = constants.%If1] {
// 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: %.loc11_11.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT: %.loc11_11.2: type = converted %bool.make_type, %.loc11_11.1 [template = bool]
// CHECK:STDOUT: %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc11_20.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT: %.loc11_20.2: type = converted %int.make_type_32, %.loc11_20.1 [template = 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: %If2.decl: %If2.type = fn_decl @If2 [template = constants.%If2] {
// 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: %.loc22_11.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT: %.loc22_11.2: type = converted %bool.make_type, %.loc22_11.1 [template = bool]
// CHECK:STDOUT: %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc22_20.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT: %.loc22_20.2: type = converted %int.make_type_32, %.loc22_20.1 [template = 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: %If3.decl: %If3.type = fn_decl @If3 [template = constants.%If3] {
// 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: %.loc33_11.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT: %.loc33_11.2: type = converted %bool.make_type, %.loc33_11.1 [template = bool]
// CHECK:STDOUT: %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc33_20.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT: %.loc33_20.2: type = converted %int.make_type_32, %.loc33_20.1 [template = 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 @If1(%b.param_patt: bool) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %b.ref: bool = name_ref b, %b
// CHECK:STDOUT: if %b.ref br !if.then else br !if.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.then:
// CHECK:STDOUT: %.loc13_12: Core.IntLiteral = int_value 1 [template = constants.%.1]
// CHECK:STDOUT: %.loc13_13.1: %Convert.type.2 = interface_witness_access constants.%.25, element0 [template = constants.%Convert.15]
// CHECK:STDOUT: %.loc13_13.2: <bound method> = bound_method %.loc13_12, %.loc13_13.1 [template = constants.%.26]
// CHECK:STDOUT: %int.convert_checked: init i32 = call %.loc13_13.2(%.loc13_12) [template = constants.%.27]
// CHECK:STDOUT: %.loc13_13.3: i32 = value_of_initializer %int.convert_checked [template = constants.%.27]
// CHECK:STDOUT: %.loc13_13.4: i32 = converted %.loc13_12, %.loc13_13.3 [template = constants.%.27]
// CHECK:STDOUT: return %.loc13_13.4
// CHECK:STDOUT:
// CHECK:STDOUT: !if.else:
// CHECK:STDOUT: br !if.done
// CHECK:STDOUT:
// CHECK:STDOUT: !if.done:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @If2(%b.param_patt: bool) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %b.ref: bool = name_ref b, %b
// CHECK:STDOUT: if %b.ref br !if.then else br !if.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.then:
// CHECK:STDOUT: br !if.done
// CHECK:STDOUT:
// CHECK:STDOUT: !if.else:
// CHECK:STDOUT: %.loc25_12: Core.IntLiteral = int_value 2 [template = constants.%.28]
// CHECK:STDOUT: %.loc25_13.1: %Convert.type.2 = interface_witness_access constants.%.25, element0 [template = constants.%Convert.15]
// CHECK:STDOUT: %.loc25_13.2: <bound method> = bound_method %.loc25_12, %.loc25_13.1 [template = constants.%.29]
// CHECK:STDOUT: %int.convert_checked: init i32 = call %.loc25_13.2(%.loc25_12) [template = constants.%.30]
// CHECK:STDOUT: %.loc25_13.3: i32 = value_of_initializer %int.convert_checked [template = constants.%.30]
// CHECK:STDOUT: %.loc25_13.4: i32 = converted %.loc25_12, %.loc25_13.3 [template = constants.%.30]
// CHECK:STDOUT: return %.loc25_13.4
// CHECK:STDOUT:
// CHECK:STDOUT: !if.done:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @If3(%b.param_patt: bool) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %b.ref: bool = name_ref b, %b
// CHECK:STDOUT: if %b.ref br !if.then else br !if.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.then:
// CHECK:STDOUT: %.loc35_12: Core.IntLiteral = int_value 1 [template = constants.%.1]
// CHECK:STDOUT: %.loc35_13.1: %Convert.type.2 = interface_witness_access constants.%.25, element0 [template = constants.%Convert.15]
// CHECK:STDOUT: %.loc35_13.2: <bound method> = bound_method %.loc35_12, %.loc35_13.1 [template = constants.%.26]
// CHECK:STDOUT: %int.convert_checked: init i32 = call %.loc35_13.2(%.loc35_12) [template = constants.%.27]
// CHECK:STDOUT: %.loc35_13.3: i32 = value_of_initializer %int.convert_checked [template = constants.%.27]
// CHECK:STDOUT: %.loc35_13.4: i32 = converted %.loc35_12, %.loc35_13.3 [template = constants.%.27]
// CHECK:STDOUT: return %.loc35_13.4
// CHECK:STDOUT:
// CHECK:STDOUT: !if.else:
// CHECK:STDOUT: }
// CHECK:STDOUT:
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