Emerge Yul recompiler (#1)

Provide a modified (and incomplete) version of ZKSync zksolc that can compile the most basic contracts

README.md

@@ -0,0 +1,32 @@
+# revive
+
+YUL and EVM bytecode recompiler to LLVM, targetting RISC-V on PolkaVM.
+
+Code bases of [frontend](https://github.com/matter-labs/era-compiler-solidity) and [code generator](https://github.com/matter-labs/era-compiler-llvm-context) are forked adapted from ZKSync `zksolc`.
+
+Primary goal of this codebase currently is to allow for benchmarks comparing runtime performance against ink!, solang and EVM interpreters.
+
+# TODO
+
+The project is in a very early PoC phase; at this stage don't expect the produced code to be working nor to be correct for anything more than a basic flipper contract yet.
+
+- [ ] Efficient implementations of byte swaps, memset, memmove and the like
+- [ ] Use drink! for integration tests once we have 64bit support in PolkaVM
+- [ ] Exercice `schlau` and possibly `smart-bench` benchmark cases
+- [ ] Tests currently rely on the binary being in $PATH, which is very annoying and requires `cargo install` all the times
+- [ ] Define how to do deployments
+- [ ] Calling conventions for calling other contracts
+- [ ] Runtime environment isn't fully figured out; implement all EVM builtins
+- [ ] Iron out many leftovers from the ZKVM target
+    - [ ] Use of exceptions
+    - [ ] Change long calls (contract calls)
+    - [ ] Check all alignments, attributes etc. if they still make sense with our target
+- [ ] Add a lot more test cases
+- [ ] Debug information
+- [ ] Look for and implement further optimizations
+- [ ] Differential testing against EVM
+- [ ] Switch to LLVM 18 which has RV{32,64}E upstream
+- [ ] Minimize scope of "stdlib", favorably implement it in high level language instead of LLVM IR.
+- [ ] Document differences from EVM
+- [ ] Audit for bugs and correctness
+- [ ] Rebranding