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Implement unused pattern bindings, continued (#6518)

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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
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toolchain/check/testdata/function/generic/template_param.carbon
Vendored
+6 -6
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@@ -16,7 +16,7 @@
library "[[@TEST_NAME]]";
fn F(template T:! type) {
fn F(unused template T:! type) {
}
fn G() {
@@ -49,13 +49,13 @@ fn G() {
// CHECK:STDOUT: %T.patt: %pattern_type = symbolic_binding_pattern T, 0, template [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %T.loc4_15.2: type = symbolic_binding T, 0, template [template = %T.loc4_15.1 (constants.%T)]
// CHECK:STDOUT: %T.loc4_22.2: type = symbolic_binding T, 0, template [template = %T.loc4_22.1 (constants.%T)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F(%T.loc4_15.2: type) {
// CHECK:STDOUT: %T.loc4_15.1: type = symbolic_binding T, 0, template [template = %T.loc4_15.1 (constants.%T)]
// CHECK:STDOUT: generic fn @F(%T.loc4_22.2: type) {
// CHECK:STDOUT: %T.loc4_22.1: type = symbolic_binding T, 0, template [template = %T.loc4_22.1 (constants.%T)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
@@ -76,11 +76,11 @@ fn G() {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%T) {
// CHECK:STDOUT: %T.loc4_15.1 => constants.%T
// CHECK:STDOUT: %T.loc4_22.1 => constants.%T
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(constants.%empty_struct_type) {
// CHECK:STDOUT: %T.loc4_15.1 => constants.%empty_struct_type
// CHECK:STDOUT: %T.loc4_22.1 => constants.%empty_struct_type
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }