…-emission, r=michaelwoerister

Don't leave debug locations for constants sitting on the builder indefinitely

Because constants are currently emitted *before* the prologue, leaving the debug location on the IRBuilder spills onto other instructions in the prologue and messes up both line numbers as well as the point LLVM chooses to be the prologue end.

Example LLVM IR (irrelevant IR elided):
Before:
```
define internal { i64, i64 } `@_ZN3tmp3Foo18var_return_opt_try17he02116165b0fc08cE(ptr` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8, !dbg !357
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
After:
```
define internal { i64, i64 } `@_ZN3tmp3Foo18var_return_opt_try17h00b17d08874ddd90E(ptr` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
Note in particular how !357 from %residual.dbg.spill's dbg_declare no longer falls through onto the store to %self.dbg.spill. This fixes argument values at entry when the constant is a ZST (e.g. `<Option as Try>::Residual`). This fixes rust-lang#130003 (but note that it does *not* fix issues with argument values and non-ZST constants, which emit their own stores that have debug info on them, like rust-lang#128945).

r? `@michaelwoerister`

…kingjubilee

Rollup of 14 pull requests

Successful merges:

 - rust-lang#129260 (Don't suggest adding return type for closures with default return type)
 - rust-lang#129520 (Suggest the correct pattern syntax on usage of unit variant pattern for a struct variant)
 - rust-lang#129696 (update stdarch)
 - rust-lang#129759 (Stabilize `const_refs_to_static`)
 - rust-lang#129835 (enable const-float-classify test, and test_next_up/down on 32bit x86)
 - rust-lang#129866 (Clarify documentation labelling and definitions for std::collections)
 - rust-lang#130052 (Don't leave debug locations for constants sitting on the builder indefinitely)
 - rust-lang#130077 (Fix linking error when compiling for 32-bit watchOS)
 - rust-lang#130123 (Report the `note` when specified in `diagnostic::on_unimplemented`)
 - rust-lang#130156 (Add test for S_OBJNAME & update test for LF_BUILDINFO cl and cmd)
 - rust-lang#130206 (Map `WSAEDQUOT` to `ErrorKind::FilesystemQuotaExceeded`)
 - rust-lang#130207 (Map `ERROR_CANT_RESOLVE_FILENAME` to `ErrorKind::FilesystemLoop`)
 - rust-lang#130219 (Fix false positive with `missing_docs` and `#[test]`)
 - rust-lang#130221 (Make SearchPath::new public)

r? `@ghost`
`@rustbot` modify labels: rollup

…-emission, r=michaelwoerister

Don't leave debug locations for constants sitting on the builder indefinitely

Because constants are currently emitted *before* the prologue, leaving the debug location on the IRBuilder spills onto other instructions in the prologue and messes up both line numbers as well as the point LLVM chooses to be the prologue end.

Example LLVM IR (irrelevant IR elided):
Before:
```
define internal { i64, i64 } ``@_ZN3tmp3Foo18var_return_opt_try17he02116165b0fc08cE(ptr`` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8, !dbg !357
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
After:
```
define internal { i64, i64 } ``@_ZN3tmp3Foo18var_return_opt_try17h00b17d08874ddd90E(ptr`` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
Note in particular how !357 from %residual.dbg.spill's dbg_declare no longer falls through onto the store to %self.dbg.spill. This fixes argument values at entry when the constant is a ZST (e.g. `<Option as Try>::Residual`). This fixes rust-lang#130003 (but note that it does *not* fix issues with argument values and non-ZST constants, which emit their own stores that have debug info on them, like rust-lang#128945).

r? ``@michaelwoerister``

…kingjubilee

Rollup of 11 pull requests

Successful merges:

 - rust-lang#119286 (show linker output even if the linker succeeds)
 - rust-lang#129103 (Don't warn empty branches unreachable for now)
 - rust-lang#129696 (update stdarch)
 - rust-lang#129835 (enable const-float-classify test, and test_next_up/down on 32bit x86)
 - rust-lang#129992 (Update compiler-builtins to 0.1.125)
 - rust-lang#130052 (Don't leave debug locations for constants sitting on the builder indefinitely)
 - rust-lang#130077 (Fix linking error when compiling for 32-bit watchOS)
 - rust-lang#130114 (Remove needless returns detected by clippy in the compiler)
 - rust-lang#130156 (Add test for S_OBJNAME & update test for LF_BUILDINFO cl and cmd)
 - rust-lang#130168 (maint: update docs for change_time ext and doc links)
 - rust-lang#130239 (miri: fix overflow detection for unsigned pointer offset)

r? `@ghost`
`@rustbot` modify labels: rollup

…-emission, r=michaelwoerister

Don't leave debug locations for constants sitting on the builder indefinitely

Because constants are currently emitted *before* the prologue, leaving the debug location on the IRBuilder spills onto other instructions in the prologue and messes up both line numbers as well as the point LLVM chooses to be the prologue end.

Example LLVM IR (irrelevant IR elided):
Before:
```
define internal { i64, i64 } ```@_ZN3tmp3Foo18var_return_opt_try17he02116165b0fc08cE(ptr``` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8, !dbg !357
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
After:
```
define internal { i64, i64 } ```@_ZN3tmp3Foo18var_return_opt_try17h00b17d08874ddd90E(ptr``` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
Note in particular how !357 from %residual.dbg.spill's dbg_declare no longer falls through onto the store to %self.dbg.spill. This fixes argument values at entry when the constant is a ZST (e.g. `<Option as Try>::Residual`). This fixes rust-lang#130003 (but note that it does *not* fix issues with argument values and non-ZST constants, which emit their own stores that have debug info on them, like rust-lang#128945).

r? ```@michaelwoerister```

Rollup of 8 pull requests

Successful merges:

 - rust-lang#129367 (Fix default/minimum deployment target for Aarch64 simulator targets)
 - rust-lang#129992 (Update compiler-builtins to 0.1.125)
 - rust-lang#130052 (Don't leave debug locations for constants sitting on the builder indefinitely)
 - rust-lang#130156 (Add test for S_OBJNAME & update test for LF_BUILDINFO cl and cmd)
 - rust-lang#130160 (Fix `slice::first_mut` docs)
 - rust-lang#130250 (Fix `clippy::useless_conversion`)
 - rust-lang#130252 (Properly report error on `const gen fn`)
 - rust-lang#130256 (Re-run coverage tests if `coverage-dump` was modified)

r? `@ghost`
`@rustbot` modify labels: rollup

…mission, r=michaelwoerister

Don't leave debug locations for constants sitting on the builder indefinitely

Because constants are currently emitted *before* the prologue, leaving the debug location on the IRBuilder spills onto other instructions in the prologue and messes up both line numbers as well as the point LLVM chooses to be the prologue end.

Example LLVM IR (irrelevant IR elided):
Before:
```
define internal { i64, i64 } `@_ZN3tmp3Foo18var_return_opt_try17he02116165b0fc08cE(ptr` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8, !dbg !357
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
After:
```
define internal { i64, i64 } `@_ZN3tmp3Foo18var_return_opt_try17h00b17d08874ddd90E(ptr` align 8 %self) !dbg !347 { start:
  %self.dbg.spill = alloca [8 x i8], align 8
  %_0 = alloca [16 x i8], align 8
  %residual.dbg.spill = alloca [0 x i8], align 1
    #dbg_declare(ptr %residual.dbg.spill, !353, !DIExpression(), !357)
  store ptr %self, ptr %self.dbg.spill, align 8
    #dbg_declare(ptr %self.dbg.spill, !350, !DIExpression(), !358)
```
Note in particular how !357 from %residual.dbg.spill's dbg_declare no longer falls through onto the store to %self.dbg.spill. This fixes argument values at entry when the constant is a ZST (e.g. `<Option as Try>::Residual`). This fixes rust-lang#130003 (but note that it does *not* fix issues with argument values and non-ZST constants, which emit their own stores that have debug info on them, like rust-lang#128945).

r? `@michaelwoerister`