Also adds the CMake infrastructure to compile and link the D source files.
The build is partially broken:
- A few files in Phobos and druntime do not build
- MSVC build is broken because of unresolved symbols involving reals
Now with *almost* working EH codegen. Does not compile Phobos yet
because we run into the "instruction does not dominate all uses"
issue when an r-value result of toElemDtor is used and we need to
run cleanups in between. Should easily be fixed by promoting those
values to allocas.
Most of the changes outside of ir/irfunction.{h, cpp} are just
because CreateCallOrInvoke moved locations. I took the
opportunity to also make use of the different arg count
overloads where possible.
Specifying the basic block before which to insert the new one
is not mandatory when calling llvm::BasicBlock::Create. This
was the only use of the tracked "end" block. The concept was
phony anyway because there is no single "end" to a scope with
unwinding and so on.
For prettying up the IR, it is possible to change the order
of basic blocks using move{Before, After}().
Includes all tagged with v2.067.0-b2. Does not includes latest druntime changes from ldc (head) branch.
This is known to be broken. I only merged the frontend stuff but did not try to compile something...
First merge of current development stream. Asm blocks are known to be broken.
DMD: 0c9f437bc24015707130ba42dc434d9cd58282fb
druntime: 86d49cfb3670904603df0cfdfe44c6fff565c0fc
Phobos: a8ca4f7964becac680af0eadbde05aa7d10fc338
Since the change to the symbol emission strategy, a lot of the
previous attempts to derive the linkage for a symbol from its
AST node has been superfluous. This cleans up all the related
code, as it is really not doing much anymore.
The code to opportunistically internalize symbols is now gone
entirely. It was commented out anyway due to problems with
making it work reliably in the face of the not-so-stable
structure of the AST we get from the frontend (regarding the
modules certain symbols end up in). But in any case internal
linkage woudl also be troublesome for cross-module inlining,
so I gave up on making this work for the time being.
The only (minor) change in the emitted code should be in
.offTi generation, which is untested and disabled by default
anyway (GENERATE_OFFTI).
Turns out that since the change to use DMD's symbol emission
logic a few releases back we didn't actually ever emit code
for the extra modules. Thus, all the effort for the extra
semantic passes went to waste.
If we want to implement DMD-style cross-module inlining, we
need to add the extra semantic3s back in, and then iterate
over all the non-root modules with a codegen visitor that
only emits symbols as available_externally.
We probably won't need the availableExternally members if
we start with a clean design in the new symbol emission
framework. Thus, remove everything in the meantime. This
will make some release builds a bit faster, and should not
negatively affect generated code.
