Should be lowering ast expressions to HIR expressions, not cheating via the hir map. That goes wrong now that there is not a 1:1 mapping between ast and hir (in the case of the crash due to ExprParen).
When both the key and value types were zero-sized, `BTreeMap` previously
called `heap::allocate` with `size == 0` for leaf nodes, which is
undefined behavior, and jemalloc would attempt to read invalid memory,
crashing the process.
This avoids undefined behavior by allocating enough space to store one
edge in leaf nodes that would otherwise have `size == 0`. Although this
uses extra memory, maps with zero-sized key types that have sensible
implementations of the ordering traits can only contain a single
key-value pair (and therefore only a single leaf node), and maps with
key and value types that are both zero-sized have few uses, if any.
Furthermore, this is a temporary fix that will likely be unnecessary
once the `BTreeMap` implementation is rewritten to use parent pointers.
Closes#28493.
it makes rustc compatible with gcc installation that are using
`--program-transform-name' configure flag (on OpenBSD for example).
- detects at configure the name of stdc++ library on the system
- use the detected name in llvm makefile (with enable-static-stdcpp),
and pass it to mklldeps.py
- generate mklldeps.rs using this detected name
note that CFG_STDCPP_NAME is about stdc++ name, not about libc++. If
using libc++, the default name will be `stdc++', but it won't be used
when linking.
Should be lowering ast expressions to HIR expressions, not cheating via the hir map. That goes wrong now that there is not a 1:1 mapping between ast and hir (in the case of the crash due to ExprParen).
Using "later" in this context makes more sense than "greater" so it's been changed to match the Linux requirement above it rather than the other way around.
Type `HANDLE` is defined on Windows as `PVOID`. Test `run-pass/x86stdcall2` defined it as `u32` that caused access violation in `catch_panic` routine at the line:
```
try!(unwind::try(move || *result = Some(f())))
```
The original failure is as follows:
```
---- [run-pass] run-pass/x86stdcall2.rs stdout ----
error: test run failed!
status: exit code: -1073741819
command: PATH="x86_64-pc-windows-msvc/stage2/bin/rustlib/x86_64-pc-windows-msvc/lib;D:\Sources\Rust\x86_64-pc-windows-msvc\stage2\bin;C:\MSYS2\mingw64\bin;C:\MSYS2\usr\local\bin;C:\MSYS2\usr\bin;C:\MSYS2\usr\bin;C:\Program Files\Python 3;C:\Program Files\Python 3\Scripts;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit;C:\Program Files\SlikSvn\bin;C:\Program Files\System Tools;C:\Program Files (x86)\System Tools;C:\Program Files\Vim\vim74;C:\Program Files\Rust\bin;C:\Program Files\Microsoft\Web Platform Installer;C:\Program Files\MiKTeX\miktex\bin\x64;C:\Program Files (x86)\Pandoc;C:\Program Files\LLVM\bin;C:\Program Files\KDiff3;C:\Program Files\Git\cmd;C:\Users\Vitali\AppData\Local\atom\bin;C:\MSYS2\usr\bin\site_perl;C:\MSYS2\usr\bin\vendor_perl;C:\MSYS2\usr\bin\core_perl" x86_64-pc-windows-msvc/test/run-pass\x86stdcall2.stage2-x86_64-pc-windows-msvc.exe
stdout:
------------------------------------------
------------------------------------------
stderr:
------------------------------------------
------------------------------------------
thread '[run-pass] run-pass/x86stdcall2.rs' panicked at 'explicit panic', D:/Sources/Rust/src/compiletest\runtest.rs:1501
```
P.S. I compiled rust for `x86_64-pc-windows-msvc`.
Currently, we're generating adjustments, for example, to get from &[u8]
to &[u8], which is unneeded and kicks us out of trans_into()
into trans() which means an additional stack slot and copy in the
unoptimized code.
