When strings lose their trailing null, this pattern will become dangerous:
let foo = "bar";
let foo_ptr: *u8 = &foo[0];
Instead we should use c_strs to handle this correctly.
* LLVM now has a C interface to LLVMBuildAtomicRMW
* The exception handling support for the JIT seems to have been dropped
* Various interfaces have been added or headers have changed
rvalues aren't going to be used anywhere but as the argument, so
there's no point in copying them. LLVM used to eliminate the copy
later, but why bother emitting it in the first place?
rvalues aren't going to be used anywhere but as the argument, so
there's no point in copying them. LLVM used to eliminate the copy
later, but why bother emitting it in the first place?
This is preparation for removing `@fn`.
This does *not* use default methods yet, because I don't know
whether they work. If they do, a forthcoming PR will use them.
This also changes the precedence of `as`.
* All globals marked as `pub` won't have the `internal` linkage type set
* All global references across crates are forced to use the address of the
global in the other crate via an external reference.
r? @graydon
Closes#8179
Change the former repetition::
for 5.times { }
to::
do 5.times { }
.times() cannot be broken with `break` or `return` anymore; for those
cases, use a numerical range loop instead.
* All globals marked as `pub` won't have the `internal` linkage type set
* All global references across crates are forced to use the address of the
global in the other crate via an external reference.
This fixes the recently introduced peak memory usage regression by
freeing the intermediate results as soon as they're not required
anymore instead of keeping them around for the whole compilation
process.
Refs #8077
Adds a fence operation to close#8061
Also adds static initializers to for atomic types. Since the fields are private, you aren't able to have `static mut` variables that are an atomic type. Each atomic type's initializer starts at a 0-value (so unset for `AtomicFlag` and false for `AtomicBool`).
The purpose here is to get rid of compile_upto, which pretty much always requires the user to read the source to figure out what it does. It's replaced by a sequence of obviously-named functions:
- phase_1_parse_input(sess, cfg, input);
- phase_2_configure_and_expand(sess, cfg, crate);
- phase_3_run_analysis_passes(sess, expanded_crate);
- phase_4_translate_to_llvm(sess, expanded_crate, &analysis, outputs);
- phase_5_run_llvm_passes(sess, &trans, outputs);
- phase_6_link_output(sess, &trans, outputs);
Each of which takes what it takes and returns what it returns, with as little variation as possible in behaviour: no "pairs of options" and "pairs of control flags". You can tell if you missed a phase because you will be missing a `phase_N` call to some `N` between 1 and 6.
It does mean that people invoking librustc from outside need to write more function calls. The benefit is that they can _figure out what they're doing_ much more easily, and stop at any point, rather than further overloading the tangled logic of `compile_upto`.
