mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-03 22:02:51 +01:00
Adrien Leravat
d02366f881
Prevent copies when initializing value expression from reference expression. This is based on https://github.com/carbon-language/carbon-lang/pull/2006, which introduces expression categories, and how it is possible to convert to/from those different categories. Continuation of https://github.com/carbon-language/carbon-lang/pull/2907 ## Functional changes * Initializing a value expression from a reference expression takes its value without a copy * Reading from the value expression causes an error if the value changed from the time it was initialized * In this situation, prevents a copy both for variable definitions, and call parameter bindings ## Main implementation changes * Add new `ExpressionCategoryAction`, which evaluates an expression and returns an `ExpressionValue` containing its category and address (if any), in addition to the resulting `Value*` * `ExpressionAction`s now invokes `ExpressionCategoryAction` and unwraps the returned `ExpressionValue` * `RuntimeScope::BindAndPin` method, and corresponding when attempting to read a `value_node`. ## Next work * Avoid unnecessary copies from value expression to value expression, after ensuring that even value expression temporaries are registered for destruction (https://github.com/Pixep/carbon-lang/pull/9)
204 lines
12 KiB
Plaintext
204 lines
12 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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// CHECK:STDOUT: ********** source program **********
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// CHECK:STDOUT: interface TestInterface {
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// CHECK:STDOUT: }
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// CHECK:STDOUT: fn Main ()-> i32 {
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// CHECK:STDOUT: {
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// CHECK:STDOUT: return 0;
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: }
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// CHECK:STDOUT: ********** resolving names **********
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// CHECK:STDOUT: ********** resolving control flow **********
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// CHECK:STDOUT: ********** type checking **********
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// CHECK:STDOUT: ** declaring interface TestInterface
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// CHECK:STDOUT: ** finished declaring interface TestInterface
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// CHECK:STDOUT: checking InterfaceDeclaration
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// CHECK:STDOUT: ** checking interface TestInterface
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// CHECK:STDOUT: impl declarations:{{ }}
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// CHECK:STDOUT: impl declarations: bool as interface EqWith(U = bool), i32 as interface EqWith(U = i32), String as interface EqWith(U = String), i32 as interface CompareWith(U = i32), String as interface CompareWith(U = String), i32 as interface LessWith(U = i32), String as interface LessWith(U = String), i32 as interface LessEqWith(U = i32), String as interface LessEqWith(U = String), i32 as interface GreaterWith(U = i32), String as interface GreaterWith(U = String), i32 as interface GreaterEqWith(U = i32), String as interface GreaterEqWith(U = String), i32 as interface Negate, i32 as interface AddWith(U = i32), i32 as interface SubWith(U = i32), i32 as interface MulWith(U = i32), i32 as interface DivWith(U = i32), i32 as interface ModWith(U = i32), i32 as interface BitComplement, i32 as interface BitAndWith(U = i32), i32 as interface BitOrWith(U = i32), i32 as interface BitXorWith(U = i32), i32 as interface LeftShiftWith(U = i32), i32 as interface RightShiftWith(U = i32), i32 as interface Inc, i32 as interface Dec, U as interface __EqualConverter [0], (T1,) as interface As(T = (U1,)) [0, 0, 0; 1, 1, 0, 0, 0], (T1, T2) as interface As(T = (U1, U2)) [0, 0, 0; 0, 0, 1; 1, 1, 0, 0, 0; 1, 1, 0, 0, 1], (T1, U1) as interface EqWith(U = (T2, U2)) [0, 0, 0; 0, 0, 1; 1, 1, 0, 0, 0; 1, 1, 0, 0, 1], (T1, T2, T3) as interface As(T = (U1, U2, U3)) [0, 0, 0; 0, 0, 1; 0, 0, 2; 1, 1, 0, 0, 0; 1, 1, 0, 0, 1; 1, 1, 0, 0, 2], T as interface ImplicitAs(T = U) [0; 1, 1, 0], T as interface As(T = U) [0; 1, 1, 0], T as interface ImplicitAs(T = U) [0; 1, 1, 0], T as interface As(T = U) [0; 1, 1, 0], T as interface AssignWith(U = U) [0; 1, 1, 0], T as interface AddAssignWith(U = U) [0; 1, 1, 0], T as interface SubAssignWith(U = U) [0; 1, 1, 0], T as interface MulAssignWith(U = U) [0; 1, 1, 0], T as interface DivAssignWith(U = U) [0; 1, 1, 0], T as interface ModAssignWith(U = U) [0; 1, 1, 0], T as interface BitAndAssignWith(U = U) [0; 1, 1, 0], T as interface BitOrAssignWith(U = U) [0; 1, 1, 0], T as interface BitXorAssignWith(U = U) [0; 1, 1, 0], T as interface LeftShiftAssignWith(U = U) [0; 1, 1, 0], T as interface RightShiftAssignWith(U = U) [0; 1, 1, 0]
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// CHECK:STDOUT: ** finished checking interface TestInterface
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// CHECK:STDOUT: ** declaring function Main
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// CHECK:STDOUT: checking TuplePattern ()
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// CHECK:STDOUT: checking IntTypeLiteral i32
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory:{{ }}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: i32 .0. ## i32 .1.
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// CHECK:STDOUT: memory:{{ }}
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// CHECK:STDOUT: }
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package ExplorerTest api;
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interface TestInterface {}
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// CHECK:STDOUT: --- step exp i32 .0. (full_trace.carbon:[[@LINE+53]]) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: i32 .1. {{[[][[]}}i32]]
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// CHECK:STDOUT: memory:{{ }}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory:{{ }}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: ** finished declaring function Main of type fn () -> i32
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// CHECK:STDOUT: checking FunctionDeclaration
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// CHECK:STDOUT: ** checking function Main
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// CHECK:STDOUT: impl declarations:{{ }}
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// CHECK:STDOUT: impl declarations: bool as interface EqWith(U = bool), i32 as interface EqWith(U = i32), String as interface EqWith(U = String), i32 as interface CompareWith(U = i32), String as interface CompareWith(U = String), i32 as interface LessWith(U = i32), String as interface LessWith(U = String), i32 as interface LessEqWith(U = i32), String as interface LessEqWith(U = String), i32 as interface GreaterWith(U = i32), String as interface GreaterWith(U = String), i32 as interface GreaterEqWith(U = i32), String as interface GreaterEqWith(U = String), i32 as interface Negate, i32 as interface AddWith(U = i32), i32 as interface SubWith(U = i32), i32 as interface MulWith(U = i32), i32 as interface DivWith(U = i32), i32 as interface ModWith(U = i32), i32 as interface BitComplement, i32 as interface BitAndWith(U = i32), i32 as interface BitOrWith(U = i32), i32 as interface BitXorWith(U = i32), i32 as interface LeftShiftWith(U = i32), i32 as interface RightShiftWith(U = i32), i32 as interface Inc, i32 as interface Dec, U as interface __EqualConverter [0], (T1,) as interface As(T = (U1,)) [0, 0, 0; 1, 1, 0, 0, 0], (T1, T2) as interface As(T = (U1, U2)) [0, 0, 0; 0, 0, 1; 1, 1, 0, 0, 0; 1, 1, 0, 0, 1], (T1, U1) as interface EqWith(U = (T2, U2)) [0, 0, 0; 0, 0, 1; 1, 1, 0, 0, 0; 1, 1, 0, 0, 1], (T1, T2, T3) as interface As(T = (U1, U2, U3)) [0, 0, 0; 0, 0, 1; 0, 0, 2; 1, 1, 0, 0, 0; 1, 1, 0, 0, 1; 1, 1, 0, 0, 2], T as interface ImplicitAs(T = U) [0; 1, 1, 0], T as interface As(T = U) [0; 1, 1, 0], T as interface ImplicitAs(T = U) [0; 1, 1, 0], T as interface As(T = U) [0; 1, 1, 0], T as interface AssignWith(U = U) [0; 1, 1, 0], T as interface AddAssignWith(U = U) [0; 1, 1, 0], T as interface SubAssignWith(U = U) [0; 1, 1, 0], T as interface MulAssignWith(U = U) [0; 1, 1, 0], T as interface DivAssignWith(U = U) [0; 1, 1, 0], T as interface ModAssignWith(U = U) [0; 1, 1, 0], T as interface BitAndAssignWith(U = U) [0; 1, 1, 0], T as interface BitOrAssignWith(U = U) [0; 1, 1, 0], T as interface BitXorAssignWith(U = U) [0; 1, 1, 0], T as interface LeftShiftAssignWith(U = U) [0; 1, 1, 0], T as interface RightShiftAssignWith(U = U) [0; 1, 1, 0]
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// CHECK:STDOUT: checking Block {
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// CHECK:STDOUT: return 0;
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: checking ReturnExpression return 0;
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// CHECK:STDOUT: checking IntLiteral 0
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// CHECK:STDOUT: ** finished checking function Main
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// CHECK:STDOUT: checking CallExpression Main()
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// CHECK:STDOUT: checking IdentifierExpression Main
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// CHECK:STDOUT: checking TupleLiteral ()
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// CHECK:STDOUT: checking call to function of type fn () -> i32
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// CHECK:STDOUT: with arguments of type: ()
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// CHECK:STDOUT: performing argument deduction for bindings:{{ }}
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// CHECK:STDOUT: deduction succeeded with results: {}
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// CHECK:STDOUT: ********** resolving unformed variables **********
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// CHECK:STDOUT: ********** printing declarations **********
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// CHECK:STDOUT: interface TestInterface {
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// CHECK:STDOUT: }
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// CHECK:STDOUT: fn Main ()-> i32 {
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// CHECK:STDOUT: {
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// CHECK:STDOUT: return 0;
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: }
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// CHECK:STDOUT: ********** starting execution **********
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// CHECK:STDOUT: ********** initializing globals **********
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step decl interface TestInterface .0. (full_trace.carbon:[[@LINE-46]]) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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fn Main() -> i32 {
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return 0;
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// CHECK:STDOUT: --- step decl fn Main .0. (full_trace.carbon:[[@LINE+106]]) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: ********** calling main function **********
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main() .0. ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step exp Main() .0. (<Main()>:0) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main .0. ## Main() .1. ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main .0. ## Main .1. ## Main() .1. ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step exp Main .0. (<Main()>:0) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main .1. {{[[][[]}}fun<Main>]] ## Main() .1. ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main() .1. {{[[][[]}}fun<Main>]] ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step exp Main() .1. (<Main()>:0) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: () .0. ## Main() .2. {{[[][[]}}fun<Main>]] ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step exp () .0. (<Main()>:0) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main() .2. {{[[][[]}}fun<Main>, ()]] ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step exp Main() .2. (<Main()>:0) --->
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// CHECK:STDOUT: calling function: fun<Main>
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// CHECK:STDOUT: match pattern ()
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// CHECK:STDOUT: from value expression with value ()
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: {return 0;} .0. ## .0. {} ## Main() .3. {{[[][[]}}fun<Main>, ()]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step stmt {return 0;} .0. (full_trace.carbon:[[@LINE+56]]) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: return 0; .0. ## {return 0;} .1. {} ## .0. {} ## Main() .3. {{[[][[]}}fun<Main>, ()]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step stmt return 0; .0. (full_trace.carbon:[[@LINE-56]]) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: 0 .0. ## return 0; .1. ## {return 0;} .1. {} ## .0. {} ## Main() .3. {{[[][[]}}fun<Main>, ()]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: 0 .0. ## 0 .1. ## return 0; .1. ## {return 0;} .1. {} ## .0. {} ## Main() .3. {{[[][[]}}fun<Main>, ()]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step exp 0 .0. (full_trace.carbon:[[@LINE-65]]) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: 0 .1. {{[[][[]}}0]] ## return 0; .1. ## {return 0;} .1. {} ## .0. {} ## Main() .3. {{[[][[]}}fun<Main>, ()]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: return 0; .1. {{[[][[]}}0]] ## {return 0;} .1. {} ## .0. {} ## Main() .3. {{[[][[]}}fun<Main>, ()]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step stmt return 0; .1. (full_trace.carbon:[[@LINE-74]]) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: clean up.0. {} ## clean up.0. {} ## Main() .3. {{[[][[]}}fun<Main>, (), 0]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: clean up.0. {} ## Main() .3. {{[[][[]}}fun<Main>, (), 0]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main() .3. {{[[][[]}}fun<Main>, (), 0]] {} ## Main() .1.
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: --- step exp Main() .3. (<Main()>:0) --->
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: clean up.0. {} ## Main() .1. {{[[][[]}}0]]
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack: Main() .1. {{[[][[]}}0]]
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: {
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// CHECK:STDOUT: stack:{{ }}
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// CHECK:STDOUT: memory: 0: Heap{}
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// CHECK:STDOUT: }
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// CHECK:STDOUT: interpreter result: 0
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// CHECK:STDOUT: ********** printing timing **********
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// CHECK:STDOUT: Time elapsed in ExecProgram: {{[0-9]+}}ms
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// CHECK:STDOUT: Time elapsed in AnalyzeProgram: {{[0-9]+}}ms
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// CHECK:STDOUT: Time elapsed in AddPrelude: {{[0-9]+}}ms
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// CHECK:STDOUT: Time elapsed in Parse: {{[0-9]+}}ms
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// CHECK:STDOUT: result: 0
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}
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