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carbon-lang/toolchain/check/testdata/if_expr/basic.carbon
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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_expr/basic.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/if_expr/basic.carbon
fn F(b: bool, n: i32, m: i32) -> i32 {
var x: [i32; 1] = (0,);
return if b then x[m] else x[n];
}
// CHECK:STDOUT: --- basic.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: %F.type: type = fn_type @F [template]
// CHECK:STDOUT: %F: %F.type = struct_value () [template]
// CHECK:STDOUT: %.1: Core.IntLiteral = int_value 1 [template]
// CHECK:STDOUT: %.2: type = array_type %.1, i32 [template]
// CHECK:STDOUT: %.4: Core.IntLiteral = int_value 0 [template]
// CHECK:STDOUT: %tuple.type: type = tuple_type (Core.IntLiteral) [template]
// CHECK:STDOUT: %.5: i32 = int_value 0 [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: %.29: <witness> = interface_witness (%Convert.15) [template]
// CHECK:STDOUT: %.30: <bound method> = bound_method %.4, %Convert.15 [template]
// CHECK:STDOUT: %array: %.2 = tuple_value (%.5) [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: .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: %b.patt: bool = binding_pattern b
// CHECK:STDOUT: %b.param_patt: bool = value_param_pattern %b.patt, runtime_param0
// CHECK:STDOUT: %n.patt: i32 = binding_pattern n
// CHECK:STDOUT: %n.param_patt: i32 = value_param_pattern %n.patt, runtime_param1
// CHECK:STDOUT: %m.patt: i32 = binding_pattern m
// CHECK:STDOUT: %m.param_patt: i32 = value_param_pattern %m.patt, runtime_param2
// CHECK:STDOUT: %return.patt: i32 = return_slot_pattern
// CHECK:STDOUT: %return.param_patt: i32 = out_param_pattern %return.patt, runtime_param3
// CHECK:STDOUT: } {
// CHECK:STDOUT: %bool.make_type: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT: %.loc11_9.1: type = value_of_initializer %bool.make_type [template = bool]
// CHECK:STDOUT: %.loc11_9.2: type = converted %bool.make_type, %.loc11_9.1 [template = bool]
// CHECK:STDOUT: %int.make_type_32.loc11_18: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc11_18.1: type = value_of_initializer %int.make_type_32.loc11_18 [template = i32]
// CHECK:STDOUT: %.loc11_18.2: type = converted %int.make_type_32.loc11_18, %.loc11_18.1 [template = i32]
// CHECK:STDOUT: %int.make_type_32.loc11_26: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc11_26.1: type = value_of_initializer %int.make_type_32.loc11_26 [template = i32]
// CHECK:STDOUT: %.loc11_26.2: type = converted %int.make_type_32.loc11_26, %.loc11_26.1 [template = i32]
// CHECK:STDOUT: %int.make_type_32.loc11_34: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc11_34.1: type = value_of_initializer %int.make_type_32.loc11_34 [template = i32]
// CHECK:STDOUT: %.loc11_34.2: type = converted %int.make_type_32.loc11_34, %.loc11_34.1 [template = i32]
// CHECK:STDOUT: %b.param: bool = value_param runtime_param0
// CHECK:STDOUT: %b: bool = bind_name b, %b.param
// CHECK:STDOUT: %n.param: i32 = value_param runtime_param1
// CHECK:STDOUT: %n: i32 = bind_name n, %n.param
// CHECK:STDOUT: %m.param: i32 = value_param runtime_param2
// CHECK:STDOUT: %m: i32 = bind_name m, %m.param
// CHECK:STDOUT: %return.param: ref i32 = out_param runtime_param3
// CHECK:STDOUT: %return: ref i32 = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%b.param_patt: bool, %n.param_patt: i32, %m.param_patt: i32) -> i32 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %int.make_type_32.loc12: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT: %.loc12_16: Core.IntLiteral = int_value 1 [template = constants.%.1]
// CHECK:STDOUT: %.loc12_11.1: type = value_of_initializer %int.make_type_32.loc12 [template = i32]
// CHECK:STDOUT: %.loc12_11.2: type = converted %int.make_type_32.loc12, %.loc12_11.1 [template = i32]
// CHECK:STDOUT: %.loc12_17: type = array_type %.loc12_16, i32 [template = constants.%.2]
// CHECK:STDOUT: %x.var: ref %.2 = var x
// CHECK:STDOUT: %x: ref %.2 = bind_name x, %x.var
// CHECK:STDOUT: %.loc12_22: Core.IntLiteral = int_value 0 [template = constants.%.4]
// CHECK:STDOUT: %.loc12_24.1: %tuple.type = tuple_literal (%.loc12_22)
// CHECK:STDOUT: %.loc12_24.2: %Convert.type.2 = interface_witness_access constants.%.29, element0 [template = constants.%Convert.15]
// CHECK:STDOUT: %.loc12_24.3: <bound method> = bound_method %.loc12_22, %.loc12_24.2 [template = constants.%.30]
// CHECK:STDOUT: %int.convert_checked: init i32 = call %.loc12_24.3(%.loc12_22) [template = constants.%.5]
// CHECK:STDOUT: %.loc12_24.4: init i32 = converted %.loc12_22, %int.convert_checked [template = constants.%.5]
// CHECK:STDOUT: %.loc12_24.5: i32 = int_value 0 [template = constants.%.5]
// CHECK:STDOUT: %.loc12_24.6: ref i32 = array_index %x.var, %.loc12_24.5
// CHECK:STDOUT: %.loc12_24.7: init i32 = initialize_from %.loc12_24.4 to %.loc12_24.6 [template = constants.%.5]
// CHECK:STDOUT: %.loc12_24.8: init %.2 = array_init (%.loc12_24.7) to %x.var [template = constants.%array]
// CHECK:STDOUT: %.loc12_25: init %.2 = converted %.loc12_24.1, %.loc12_24.8 [template = constants.%array]
// CHECK:STDOUT: assign %x.var, %.loc12_25
// 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: %x.ref.loc13_20: ref %.2 = name_ref x, %x
// CHECK:STDOUT: %m.ref: i32 = name_ref m, %m
// CHECK:STDOUT: %.loc13_23.1: ref i32 = array_index %x.ref.loc13_20, %m.ref
// CHECK:STDOUT: %.loc13_23.2: i32 = bind_value %.loc13_23.1
// CHECK:STDOUT: br !if.expr.result(%.loc13_23.2)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.else:
// CHECK:STDOUT: %x.ref.loc13_30: ref %.2 = name_ref x, %x
// CHECK:STDOUT: %n.ref: i32 = name_ref n, %n
// CHECK:STDOUT: %.loc13_33.1: ref i32 = array_index %x.ref.loc13_30, %n.ref
// CHECK:STDOUT: %.loc13_33.2: i32 = bind_value %.loc13_33.1
// CHECK:STDOUT: br !if.expr.result(%.loc13_33.2)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.result:
// CHECK:STDOUT: %.loc13_10: i32 = block_arg !if.expr.result
// CHECK:STDOUT: return %.loc13_10
// CHECK:STDOUT: }
// CHECK:STDOUT:
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