Auto merge of #119954 - scottmcm:option-unwrap-failed, r=WaffleLapkin

Split out `option::unwrap_failed` like we have `result::unwrap_failed`

...and like `option::expect_failed`

Author: bors

library/core/src/option.rs

@@ -921,14 +921,14 @@ impl<T> Option<T> {
     /// let x: Option<&str> = None;
     /// assert_eq!(x.unwrap(), "air"); // fails
     /// ```
-    #[inline]
+    #[inline(always)]
     #[track_caller]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_unstable(feature = "const_option", issue = "67441")]
     pub const fn unwrap(self) -> T {
         match self {
             Some(val) => val,
-            None => panic("called `Option::unwrap()` on a `None` value"),
+            None => unwrap_failed(),
         }
     }
 
@@ -1970,6 +1970,14 @@ impl<T, E> Option<Result<T, E>> {
     }
 }
 
+#[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
+#[cfg_attr(feature = "panic_immediate_abort", inline)]
+#[cold]
+#[track_caller]
+const fn unwrap_failed() -> ! {
+    panic("called `Option::unwrap()` on a `None` value")
+}
+
 // This is a separate function to reduce the code size of .expect() itself.
 #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
 #[cfg_attr(feature = "panic_immediate_abort", inline)]

tests/codegen/debuginfo-inline-callsite-location.rs

@@ -4,9 +4,9 @@
 // can correctly merge the debug info if it merges the inlined code (e.g., for merging of tail
 // calls to panic.
 
-// CHECK:       tail call void @_ZN4core9panicking5panic17h{{([0-9a-z]{16})}}E
+// CHECK:       tail call void @_ZN4core6option13unwrap_failed17h{{([0-9a-z]{16})}}E
 // CHECK-SAME:  !dbg ![[#first_dbg:]]
-// CHECK:       tail call void @_ZN4core9panicking5panic17h{{([0-9a-z]{16})}}E
+// CHECK:       tail call void @_ZN4core6option13unwrap_failed17h{{([0-9a-z]{16})}}E
 // CHECK-SAME:  !dbg ![[#second_dbg:]]
 
 // CHECK-DAG:   ![[#func_dbg:]] = distinct !DISubprogram(name: "unwrap<i32>"

tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-abort.mir

@@ -51,7 +51,7 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb4: {
-        _7 = core::panicking::panic(const "called `Option::unwrap()` on a `None` value") -> unwind unreachable;
+        _7 = option::unwrap_failed() -> unwind unreachable;
     }
 
     bb5: {

tests/mir-opt/issues/issue_59352.num_to_digit.PreCodegen.after.panic-unwind.mir

@@ -51,7 +51,7 @@ fn num_to_digit(_1: char) -> u32 {
     }
 
     bb4: {
-        _7 = core::panicking::panic(const "called `Option::unwrap()` on a `None` value") -> unwind continue;
+        _7 = option::unwrap_failed() -> unwind continue;
     }
 
     bb5: {

tests/mir-opt/pre-codegen/issue_117368_print_invalid_constant.main.GVN.32bit.panic-abort.diff

@@ -64,7 +64,7 @@
       }
 
       bb1: {
-          _11 = core::panicking::panic(const "called `Option::unwrap()` on a `None` value") -> unwind unreachable;
+          _11 = option::unwrap_failed() -> unwind unreachable;
       }
 
       bb2: {

tests/mir-opt/pre-codegen/issue_117368_print_invalid_constant.main.GVN.32bit.panic-unwind.diff

@@ -64,7 +64,7 @@
       }
 
       bb2: {
-          _11 = core::panicking::panic(const "called `Option::unwrap()` on a `None` value") -> unwind continue;
+          _11 = option::unwrap_failed() -> unwind continue;
       }
 
       bb3: {

tests/mir-opt/pre-codegen/issue_117368_print_invalid_constant.main.GVN.64bit.panic-abort.diff

@@ -64,7 +64,7 @@
       }
 
       bb1: {
-          _11 = core::panicking::panic(const "called `Option::unwrap()` on a `None` value") -> unwind unreachable;
+          _11 = option::unwrap_failed() -> unwind unreachable;
       }
 
       bb2: {

tests/mir-opt/pre-codegen/issue_117368_print_invalid_constant.main.GVN.64bit.panic-unwind.diff

@@ -64,7 +64,7 @@
       }
 
       bb2: {
-          _11 = core::panicking::panic(const "called `Option::unwrap()` on a `None` value") -> unwind continue;
+          _11 = option::unwrap_failed() -> unwind continue;
       }
 
       bb3: {