Pre-intern a symbol for env!("CFG_RELEASE")

dtolnay · dtolnay · commit 4cec09a7ddaa · 2023-10-25T14:13:13.000-07:00
diff --git a/compiler/rustc_attr/src/builtin.rs b/compiler/rustc_attr/src/builtin.rs
@@ -24,7 +24,7 @@ use crate::session_diagnostics::{self, IncorrectReprFormatGenericCause};
 pub const VERSION_PLACEHOLDER: &str = "CURRENT_RUSTC_VERSION";
 
 pub fn rust_version_symbol() -> Symbol {
-    Symbol::intern(env!("CFG_RELEASE"))
+    sym::env_CFG_RELEASE
 }
 
 pub fn is_builtin_attr(attr: &Attribute) -> bool {
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
@@ -713,6 +713,7 @@ symbols! {
         encode,
         end,
         env,
+        env_CFG_RELEASE: env!("CFG_RELEASE"),
         eprint_macro,
         eprintln_macro,
         eq,

Original file line number	Diff line number	Diff line change
`@@ -24,7 +24,7 @@ use crate::session_diagnostics::{self, IncorrectReprFormatGenericCause};`
`24`	`24`	`pub const VERSION_PLACEHOLDER: &str = "CURRENT_RUSTC_VERSION";`
`25`	`25`
`26`	`26`	`pub fn rust_version_symbol() -> Symbol {`
`27`		`- Symbol::intern(env!("CFG_RELEASE"))`
	`27`	`+ sym::env_CFG_RELEASE`
`28`	`28`	`}`
`29`	`29`
`30`	`30`	`pub fn is_builtin_attr(attr: &Attribute) -> bool {`