Implement unused pattern bindings, continued (#6518)

Implementation of unused pattern bindings #2022, continued.

Whereas previous PR #6460 took care of parsing, and PR #6479 prepared
the stage by using _ in some test cases, this PR has the the actual
implementation, using a simple dataflow analysis.

---------

Co-authored-by: Burak Emir <bqe@google.com>
Co-authored-by: jonmeow <jperkins@google.com>
This commit is contained in:
Burak Emir
2026-02-19 23:33:36 +00:00
committed by GitHub
co-authored by Burak Emir jonmeow
parent bea24a8bee
commit fdb188ccfd
366 changed files with 8453 additions and 7996 deletions
@@ -12,7 +12,7 @@
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/call/params_two_comma.carbon
fn Foo(a: i32, b: i32,) {}
fn Foo(unused a: i32, unused b: i32,) {}
fn Main() {
Foo(1, 2);
@@ -82,15 +82,15 @@ fn Main() {
// CHECK:STDOUT: %b.param_patt: %pattern_type.7ce = value_param_pattern %b.patt, call_param1 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %a.param: %i32 = value_param call_param0
// CHECK:STDOUT: %.loc15_11: type = splice_block %i32.loc15_11 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc15_11: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_11: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %.loc15_18: type = splice_block %i32.loc15_18 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc15_18: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_18: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: %i32 = value_binding a, %a.param
// CHECK:STDOUT: %b.param: %i32 = value_param call_param1
// CHECK:STDOUT: %.loc15_19: type = splice_block %i32.loc15_19 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc15_19: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_19: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %.loc15_33: type = splice_block %i32.loc15_33 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc15_33: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_33: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %b: %i32 = value_binding b, %b.param
// CHECK:STDOUT: }