Compile rustc using cg_clif

[bjorn3]

$ cd rustc_codegen_cranelift
$ cargo build --release
$ git clone https://github.com/rust-lang/rust.git
$ cd rust
$ git apply ../patches/*
$ git apply - <<EOF
diff --git a/src/bootstrap/bin/rustc.rs b/src/bootstrap/bin/rustc.rs
index 475f2e90463..9f722fd7969 100644
--- a/src/bootstrap/bin/rustc.rs
+++ b/src/bootstrap/bin/rustc.rs
@@ -56,7 +56,7 @@ fn main() {
     let mut dylib_path = bootstrap::util::dylib_path();
     dylib_path.insert(0, PathBuf::from(&libdir));
 
-    let mut cmd = Command::new(rustc);
+    let mut cmd = Command::new(&rustc);
     cmd.args(&args)
         .env(bootstrap::util::dylib_path_var(),
              env::join_paths(&dylib_path).unwrap());
@@ -81,6 +81,11 @@ fn main() {
         cmd.env("RUST_BACKTRACE", "1");
     }
 
+    if target.is_some() && (stage == "0" || rustc.to_str().unwrap().contains(".rustup")) {
+        eprintln!("{}: bootstrap", crate_name.unwrap_or("<none>"));
+        cmd.arg("-Zcodegen-backend=$(pwd)/../target/release/librustc_codegen_cranelift.dylib");
+    }
+
     if target.is_some() {
         // The stage0 compiler has a special sysroot distinct from what we
         // actually downloaded, so we just always pass the `--sysroot` option,
diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs
index 6ea32edfb20..28366985c10 100644
--- a/src/bootstrap/compile.rs
+++ b/src/bootstrap/compile.rs
@@ -577,8 +577,6 @@ impl Step for CodegenBackend {
         let out_dir = builder.cargo_out(compiler, Mode::Codegen, target);
 
         let mut cargo = builder.cargo(compiler, Mode::Codegen, target, "build");
-        cargo.arg("--manifest-path")
-            .arg(builder.src.join("src/librustc_codegen_llvm/Cargo.toml"));
         rustc_cargo_env(builder, &mut cargo);
 
         let features = build_codegen_backend(&builder, &mut cargo, &compiler, target, backend);
@@ -593,7 +591,7 @@ impl Step for CodegenBackend {
         let mut files = files.into_iter()
             .filter(|f| {
                 let filename = f.file_name().unwrap().to_str().unwrap();
-                is_dylib(filename) && filename.contains("rustc_codegen_llvm-")
+                is_dylib(filename) && filename.contains("rustc_codegen_")
             });
         let codegen_backend = match files.next() {
             Some(f) => f,
@@ -618,6 +616,10 @@ pub fn build_codegen_backend(builder: &Builder<'_>,
     let mut features = String::new();
 
     match &*backend {
+        "cranelift" => {
+            cargo.arg("--manifest-path")
+                .arg(builder.src.join("../Cargo.toml"));
+        }
         "llvm" | "emscripten" => {
             // Build LLVM for our target. This will implicitly build the
             // host LLVM if necessary.
@@ -673,6 +675,8 @@ pub fn build_codegen_backend(builder: &Builder<'_>,
             if builder.config.llvm_optimize && !builder.config.llvm_release_debuginfo {
                 cargo.env("LLVM_NDEBUG", "1");
             }
+            cargo.arg("--manifest-path")
+                .arg(builder.src.join("src/rustc_codegen_llvm/Cargo.toml"));
         }
         _ => panic!("unknown backend: {}", backend),
     }
diff --git a/src/librustc_data_structures/Cargo.toml b/src/librustc_data_structures/Cargo.toml
index e020f2f8da9..9767df6faab 100644
--- a/src/librustc_data_structures/Cargo.toml
+++ b/src/librustc_data_structures/Cargo.toml
@@ -28,4 +28,4 @@ rustc_index = { path = "../librustc_index", package = "rustc_index" }
 
 [dependencies.parking_lot]
 version = "0.9"
-features = ["nightly"]
+#features = ["nightly"]
diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs
index dd088b68a23..b1b6be041e9 100644
--- a/src/librustc_driver/lib.rs
+++ b/src/librustc_driver/lib.rs
@@ -773,7 +773,6 @@ pub fn version(binary: &str, matches: &getopts::Matches) {
         println!("commit-date: {}", unw(commit_date_str()));
         println!("host: {}", config::host_triple());
         println!("release: {}", unw(release_str()));
-        get_codegen_sysroot("llvm")().print_version();
     }
 }
 
@@ -1159,13 +1158,14 @@ fn extra_compiler_flags() -> Option<(Vec<String>, bool)> {
 /// compilation on fatal errors. This function catches that sentinel and turns
 /// the panic into a `Result` instead.
 pub fn catch_fatal_errors<F: FnOnce() -> R, R>(f: F) -> Result<R, ErrorReported> {
-    catch_unwind(panic::AssertUnwindSafe(f)).map_err(|value| {
+    /*catch_unwind(panic::AssertUnwindSafe(f)).map_err(|value| {
         if value.is::<errors::FatalErrorMarker>() {
             ErrorReported
         } else {
             panic::resume_unwind(value);
         }
-    })
+    })*/
+    Ok(f())
 }
 
 lazy_static! {
diff --git a/src/librustc_interface/util.rs b/src/librustc_interface/util.rs
index b05bad554f4..8e3ea2db6e8 100644
--- a/src/librustc_interface/util.rs
+++ b/src/librustc_interface/util.rs
@@ -149,7 +149,7 @@ impl Write for Sink {
 
 #[cfg(not(parallel_compiler))]
 pub fn scoped_thread<F: FnOnce() -> R + Send, R: Send>(cfg: thread::Builder, f: F) -> R {
-    struct Ptr(*mut ());
+    /*struct Ptr(*mut ());
     unsafe impl Send for Ptr {}
     unsafe impl Sync for Ptr {}
 
@@ -167,7 +167,8 @@ pub fn scoped_thread<F: FnOnce() -> R + Send, R: Send>(cfg: thread::Builder, f:
     match thread.unwrap().join() {
         Ok(()) => result.unwrap(),
         Err(p) => panic::resume_unwind(p),
-    }
+    }*/
+    f()
 }
 
 #[cfg(not(parallel_compiler))]
@@ -272,7 +273,8 @@ pub fn get_codegen_backend(sess: &Session) -> Box<dyn CodegenBackend> {
 
     INIT.call_once(|| {
         let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
-            .unwrap_or(&sess.target.target.options.codegen_backend);
+            .map(|s| &**s)
+            .unwrap_or("cranelift");
         let backend = match &codegen_name[..] {
             filename if filename.contains(".") => {
                 load_backend_from_dylib(filename.as_ref())
@@ -459,7 +461,7 @@ pub fn get_codegen_sysroot(backend_name: &str) -> fn() -> Box<dyn CodegenBackend
 
     let mut file: Option<PathBuf> = None;
 
-    let expected_name = format!("rustc_codegen_llvm-{}", backend_name);
+    let expected_name = format!("rustc_codegen_cranelift-{}", backend_name);
     for entry in d.filter_map(|e| e.ok()) {
         let path = entry.path();
         let filename = match path.file_name().and_then(|s| s.to_str()) {
EOF
$ cat > config.toml
[rust]
codegen-backends = ["cranelift"]
deny-warnings = false

[build]
local-rebuild = true
rustc = "$(echo $HOME/.rustup/toolchains/nightly-x86_64-*/bin/rustc)"
$ ./x.py --target <fill_in_your_target>

Currently fails while compiling libcore using the new compiler with:

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
  * frame #0: 0x000000010bfcfd98 librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::interpret::operator::_$LT$impl$u20$rustc_mir..interpret..eval_context..InterpCx$LT$M$GT$$GT$::binary_int_op::h39e964764264c980 + 7336
    frame #1: 0x00007ffeedb595a0
    frame #2: 0x000000010cbc5369 librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::interpret::operator::_$LT$impl$u20$rustc_mir..interpret..eval_context..InterpCx$LT$M$GT$$GT$::overflowing_binary_op::h0815cada9026d570 + 12825
    frame #3: 0x000000010bc7bf22 librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::interpret::operator::_$LT$impl$u20$rustc_mir..interpret..eval_context..InterpCx$LT$M$GT$$GT$::binop_with_overflow::h6dcfbbcdef4d2605 + 338
    frame #4: 0x000000010c9f4cfa librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::interpret::step::_$LT$impl$u20$rustc_mir..interpret..eval_context..InterpCx$LT$M$GT$$GT$::eval_rvalue_into_place::h022fcd6cee1ec203 + 6714
    frame #5: 0x000000010bb78124 librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::transform::const_prop::ConstPropagator::const_prop::_$u7b$$u7b$closure$u7d$$u7d$::hd9f77bd6e9cda066 + 788
    frame #6: 0x000000010b550743 librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::transform::const_prop::ConstPropagator::use_ecx::hf516d40ce7ae2798 + 675
    frame #7: 0x000000010c63c453 librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::transform::const_prop::ConstPropagator::const_prop::h5a2438af1de70ec0 + 6355
    frame #8: 0x000000010c91d21f librustc_driver-5791a7e91c818ec7.dylib`_$LT$rustc_mir..transform..const_prop..ConstPropagator$u20$as$u20$rustc..mir..visit..MutVisitor$GT$::visit_statement::haf67b3d948fd6e40 + 1247
    frame #9: 0x000000010afee9bf librustc_driver-5791a7e91c818ec7.dylib`rustc::mir::visit::MutVisitor::super_basic_block_data::hdf9aeabca73fc59c + 495
    frame #10: 0x000000010c213acd librustc_driver-5791a7e91c818ec7.dylib`rustc::mir::visit::MutVisitor::visit_basic_block_data::h75a2c2aafc930d58 + 61
    frame #11: 0x000000010b03b532 librustc_driver-5791a7e91c818ec7.dylib`rustc::mir::visit::MutVisitor::super_body::h4c0d6d49440cc7e0 + 786
    frame #12: 0x000000010b18c79a librustc_driver-5791a7e91c818ec7.dylib`rustc::mir::visit::MutVisitor::visit_body::hc510a58cc87353f3 + 10
    frame #13: 0x000000010ce0b17e librustc_driver-5791a7e91c818ec7.dylib`_$LT$rustc_mir..transform..const_prop..ConstProp$u20$as$u20$rustc_mir..transform..MirPass$GT$::run_pass::h947f20b8b28cae6b + 3582
    frame #14: 0x000000010c71ff73 librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::transform::run_passes::_$u7b$$u7b$closure$u7d$$u7d$::h034ea46963d6c7f8 + 467
    frame #15: 0x000000010cca51bc librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::transform::run_passes::h96df8cf6d5cc8e66 + 908
    frame #16: 0x000000010b419d8f librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::transform::run_optimization_passes::h7cef930c71deb22a + 3007
    frame #17: 0x000000010c4f550c librustc_driver-5791a7e91c818ec7.dylib`rustc_mir::transform::optimized_mir::h5218517112155afa + 668
    frame #18: 0x000000010ede9a30 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::_$LT$impl$u20$rustc..ty..query..config..QueryAccessors$u20$for$u20$rustc..ty..query..queries..optimized_mir$GT$::compute::_$u7b$$u7b$closure$u7d$$u7d$::h9aa3fa333b453592 + 384
    frame #19: 0x000000010f13e6d3 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::__query_compute::optimized_mir::h1eeb3b261f804979 + 83
    frame #20: 0x000000010e99def3 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::_$LT$impl$u20$rustc..ty..query..config..QueryAccessors$u20$for$u20$rustc..ty..query..queries..optimized_mir$GT$::compute::h915ac87106bcd204 + 99
    frame #21: 0x000000010ef63cd2 librustc_driver-5791a7e91c818ec7.dylib`rustc::dep_graph::graph::DepGraph::with_task_impl::hecb99bc841482fe2 + 306
    frame #22: 0x000000010f07755f librustc_driver-5791a7e91c818ec7.dylib`rustc::dep_graph::graph::DepGraph::with_task::hc10966ffc80ea705 + 271
    frame #23: 0x000000010ed92eb3 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::force_query_with_job::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h32ca3f250df06d93 + 515
    frame #24: 0x000000010ee4a116 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::start_query::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h486b9a18b0825fd0 + 150
    frame #25: 0x000000010eab5e70 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_context::_$u7b$$u7b$closure$u7d$$u7d$::hcc742e18f9398fb8 + 144
    frame #26: 0x000000010e509f89 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::set_tlv::ha2dba59ada58c63e + 249
    frame #27: 0x000000010ed1711f librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_context::h4b72df86eab37212 + 143
    frame #28: 0x000000010e6b6284 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::start_query::_$u7b$$u7b$closure$u7d$$u7d$::h7684079179c8ee45 + 388
    frame #29: 0x000000010e82198f librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_related_context::_$u7b$$u7b$closure$u7d$$u7d$::h10464e6e9ac75a15 + 335
    frame #30: 0x000000010edd42fa librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_context::_$u7b$$u7b$closure$u7d$$u7d$::hbe9a7d3406d2aa88 + 298
    frame #31: 0x000000010e86a0df librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_context_opt::he9c955e66abaef37 + 367
    frame #32: 0x000000010ee41936 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_context::h493650448c91f4de + 86
    frame #33: 0x000000010e990e65 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_related_context::h1929151f6c846510 + 117
    frame #34: 0x000000010ede3460 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::start_query::h195593f17be0202c + 224
    frame #35: 0x000000010ecb2abc librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::force_query_with_job::_$u7b$$u7b$closure$u7d$$u7d$::h102d60e011b4e727 + 268
    frame #36: 0x000000010efa3138 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::with_diagnostics::hf657f0cd7ec450b4 + 248
    frame #37: 0x000000010ea7c246 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::force_query_with_job::h99721e1332d41c7a + 1078
    frame #38: 0x000000010f0f95ff librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::plumbing::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::get_query::hfee388ca31ed1348 + 2751
    frame #39: 0x000000010ea705d9 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::TyCtxtAt::optimized_mir::hb8f2f6c7614eb69e + 169
    frame #40: 0x000000010e73b0bc librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::query::_$LT$impl$u20$rustc..ty..context..TyCtxt$GT$::optimized_mir::hfb4ed97f260bbdc8 + 156
    frame #41: 0x000000010eef46e8 librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::EncodeContext::encode_optimized_mir::hb12b094675d182ad + 792
    frame #42: 0x000000010ec26c5b librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::EncodeContext::encode_info_for_impl_item::h5eee317b43ff1a70 + 5323
    frame #43: 0x000000010ee9e5ed librustc_driver-5791a7e91c818ec7.dylib`core::ops::function::FnOnce::call_once::hdf473ee76e413793 + 77
    frame #44: 0x000000010ee7895a librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::EncodeContext::record::h1bc846c63ee39a62 + 314
    frame #45: 0x000000010ef8fa01 librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::EncodeContext::encode_addl_info_for_item::hb2830913baa3783f + 2401
    frame #46: 0x000000010f02b86c librustc_driver-5791a7e91c818ec7.dylib`_$LT$rustc_metadata..encoder..EncodeContext$u20$as$u20$rustc..hir..intravisit..Visitor$GT$::visit_item::h33eacef5c0257d77 + 412
    frame #47: 0x000000010eff04c0 librustc_driver-5791a7e91c818ec7.dylib`_$LT$rustc..hir..itemlikevisit..DeepVisitor$LT$V$GT$$u20$as$u20$rustc..hir..itemlikevisit..ItemLikeVisitor$GT$::visit_item::h6c7aeaecf6f45c40 + 16
    frame #48: 0x000000010f0003b1 librustc_driver-5791a7e91c818ec7.dylib`rustc::hir::Crate::visit_all_item_likes::hd58076888de21f2d + 385
    frame #49: 0x000000010eea85c8 librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::EncodeContext::encode_info_for_items::h201ce08a434ae70b + 536
    frame #50: 0x000000010f138965 librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::EncodeContext::encode_crate_root::h71be0a0455709345 + 1973
    frame #51: 0x000000010ed8d0ce librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::encode_metadata::_$u7b$$u7b$closure$u7d$$u7d$::h8523420032380184 + 1038
    frame #52: 0x000000010edb7cd3 librustc_driver-5791a7e91c818ec7.dylib`rustc::dep_graph::graph::DepGraph::with_ignore::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h80606b976a587577 + 115
    frame #53: 0x000000010e75a5a0 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_context::_$u7b$$u7b$closure$u7d$$u7d$::heffa789c5054df6b + 160
    frame #54: 0x000000010e75c577 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::set_tlv::h980d28b19328d398 + 247
    frame #55: 0x000000010e585f0f librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_context::h05eb1940e6506ebd + 159
    frame #56: 0x000000010e66987c librustc_driver-5791a7e91c818ec7.dylib`rustc::dep_graph::graph::DepGraph::with_ignore::_$u7b$$u7b$closure$u7d$$u7d$::h3f4c14ba81260de9 + 332
    frame #57: 0x000000010eb902f4 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_context::_$u7b$$u7b$closure$u7d$$u7d$::h0d83229c95c3749a + 324
    frame #58: 0x000000010ea91157 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_context_opt::hab1d3ae2013efce6 + 423
    frame #59: 0x000000010e9e663d librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_context::h801d3c4987bbf7d3 + 109
    frame #60: 0x000000010f045afd librustc_driver-5791a7e91c818ec7.dylib`rustc::dep_graph::graph::DepGraph::with_ignore::hf13cab4cde210bdb + 109
    frame #61: 0x000000010f186ea5 librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::encoder::encode_metadata::hd01b787502c1d973 + 485
    frame #62: 0x000000010f12360d librustc_driver-5791a7e91c818ec7.dylib`rustc_metadata::cstore_impl::_$LT$impl$u20$rustc..middle..cstore..CrateStore$u20$for$u20$rustc_metadata..cstore..CStore$GT$::encode_metadata::h77bca98dff621b26 + 61
    frame #63: 0x0000000111f807af librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::TyCtxt::encode_metadata::ha030e33d1955fcfe + 175
    frame #64: 0x00000001084217f3 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::encode_and_write_metadata::h00cd2f5b5ec91313 + 515
    frame #65: 0x00000001080767a9 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::start_codegen::_$u7b$$u7b$closure$u7d$$u7d$::h6834a8c1839eed75 + 89
    frame #66: 0x00000001082999ea librustc_driver-5791a7e91c818ec7.dylib`rustc::util::common::time_ext::h21e07834fb303cb7 + 218
    frame #67: 0x0000000108311731 librustc_driver-5791a7e91c818ec7.dylib`rustc::util::common::time::ha6c84b17ce3ba643 + 273
    frame #68: 0x000000010825b497 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::start_codegen::h6745a7e6c32f9265 + 871
    frame #69: 0x0000000107d88859 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::queries::_$LT$impl$u20$rustc_interface..interface..Compiler$GT$::ongoing_codegen::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hf6a4c0b1b84500f7 + 745
    frame #70: 0x0000000108001025 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::BoxedGlobalCtxt::enter::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h93c8a152b3b79a5e + 149
    frame #71: 0x0000000107d2d140 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_global::_$u7b$$u7b$closure$u7d$$u7d$::h6037130dfd231737 + 160
    frame #72: 0x00000001081f9820 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_context::_$u7b$$u7b$closure$u7d$$u7d$::hd2c5b07655160e9b + 144
    frame #73: 0x00000001080628b9 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::set_tlv::he6588a55cc6ee59e + 249
    frame #74: 0x00000001080bfa2f librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_context::heb9a049a650102a5 + 143
    frame #75: 0x0000000107d66368 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::enter_global::h5a50333276c26acf + 408
    frame #76: 0x0000000107fb5e95 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::BoxedGlobalCtxt::enter::_$u7b$$u7b$closure$u7d$$u7d$::h824d538aa552d51d + 85
    frame #77: 0x0000000107a57135 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::BoxedGlobalCtxt::access::_$u7b$$u7b$closure$u7d$$u7d$::h04a10d84feb3b8ef + 197
    frame #78: 0x0000000107b63d70 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::create_global_ctxt::_$u7b$$u7b$closure$u7d$$u7d$::he8c4b80522b1e3ad + 2720
    frame #79: 0x00000001084729fa librustc_driver-5791a7e91c818ec7.dylib`alloc::boxed::_$LT$impl$u20$core..ops..generator..Generator$u20$for$u20$core..pin..Pin$LT$alloc..boxed..Box$LT$G$GT$$GT$$GT$::resume::h31cf85a80a0b25b4 + 106
    frame #80: 0x0000000108481dc4 librustc_driver-5791a7e91c818ec7.dylib`rustc_data_structures::box_region::PinnedGenerator$LT$I$C$A$C$R$GT$::access::h561917bdc56d7d7e + 132
    frame #81: 0x0000000108057712 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::BoxedGlobalCtxt::access::h75e88e24ca2eb810 + 418
    frame #82: 0x0000000107bc3560 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::passes::BoxedGlobalCtxt::enter::hb20fb9106eeaf309 + 80
    frame #83: 0x00000001082219ef librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::queries::_$LT$impl$u20$rustc_interface..interface..Compiler$GT$::ongoing_codegen::_$u7b$$u7b$closure$u7d$$u7d$::h5a36e77a5957f67c + 639
    frame #84: 0x00000001083f7b6a librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::queries::Query$LT$T$GT$::compute::he747fdbb9674cac7 + 234
    frame #85: 0x0000000108382206 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::queries::_$LT$impl$u20$rustc_interface..interface..Compiler$GT$::ongoing_codegen::hbfbc79c76b042955 + 86
    frame #86: 0x000000010757992c librustc_driver-5791a7e91c818ec7.dylib`rustc_driver::run_compiler::_$u7b$$u7b$closure$u7d$$u7d$::hae40159a6f6b29b6 + 8812
    frame #87: 0x0000000107972765 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::interface::run_compiler_in_existing_thread_pool::h889f2e7df80c2f0d + 1813
    frame #88: 0x00000001078ebf43 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::interface::run_compiler::_$u7b$$u7b$closure$u7d$$u7d$::h2994953efb52cf6e + 147
    frame #89: 0x000000010777763f librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::util::spawn_thread_pool::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::ha19c9542ba12d219 + 95
    frame #90: 0x00000001077dc5c5 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_thread_locals::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hc28b48421a7f7a96 + 245
    frame #91: 0x00000001077a756a librustc_driver-5791a7e91c818ec7.dylib`std::thread::local::LocalKey$LT$T$GT$::try_with::h636760eb031a5ae7 + 474
    frame #92: 0x00000001077819cb librustc_driver-5791a7e91c818ec7.dylib`std::thread::local::LocalKey$LT$T$GT$::with::h5220682da232a96f + 107
    frame #93: 0x000000010769f199 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_thread_locals::_$u7b$$u7b$closure$u7d$$u7d$::h46b02174573c230a + 265
    frame #94: 0x0000000107728ffa librustc_driver-5791a7e91c818ec7.dylib`std::thread::local::LocalKey$LT$T$GT$::try_with::h00f355cd400b5198 + 474
    frame #95: 0x00000001079b848b librustc_driver-5791a7e91c818ec7.dylib`std::thread::local::LocalKey$LT$T$GT$::with::h572d6d6cfa713135 + 107
    frame #96: 0x00000001079a5395 librustc_driver-5791a7e91c818ec7.dylib`rustc::ty::context::tls::with_thread_locals::h2306c8e6039228b5 + 117
    frame #97: 0x000000010771434f librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::util::spawn_thread_pool::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::ha52e6acab1058cc0 + 447
    frame #98: 0x0000000107623d9f librustc_driver-5791a7e91c818ec7.dylib`scoped_tls::ScopedKey$LT$T$GT$::set::haef92ef22d99be05 + 239
    frame #99: 0x00000001075a6a49 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::util::spawn_thread_pool::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::h367ac6567fd9c58b + 217
    frame #100: 0x00000001078918df librustc_driver-5791a7e91c818ec7.dylib`scoped_tls::ScopedKey$LT$T$GT$::set::h4f8868bc18c7168e + 239
    frame #101: 0x00000001077df58d librustc_driver-5791a7e91c818ec7.dylib`syntax::with_globals::_$u7b$$u7b$closure$u7d$$u7d$::ha510e7117f02222b + 157
    frame #102: 0x00000001079a0e0f librustc_driver-5791a7e91c818ec7.dylib`scoped_tls::ScopedKey$LT$T$GT$::set::h0acc9da3973500d0 + 239
    frame #103: 0x00000001079b8cab librustc_driver-5791a7e91c818ec7.dylib`syntax::with_globals::h6943f62da2fe1cf3 + 251
    frame #104: 0x00000001075156b8 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::util::spawn_thread_pool::_$u7b$$u7b$closure$u7d$$u7d$::hfc82785a174f4826 + 168
    frame #105: 0x00000001074cd7dd librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::util::scoped_thread::h7c257b5ed6f3f8f4 + 141
    frame #106: 0x000000010794c5b3 librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::util::spawn_thread_pool::hf972e343cf523dce + 579
    frame #107: 0x0000000107956f8d librustc_driver-5791a7e91c818ec7.dylib`rustc_interface::interface::run_compiler::h0f62d5709775d36f + 349
    frame #108: 0x000000010790d9a1 librustc_driver-5791a7e91c818ec7.dylib`rustc_driver::run_compiler::h08962bbb02925037 + 5905
    frame #109: 0x000000010772b0cd librustc_driver-5791a7e91c818ec7.dylib`rustc_driver::main::_$u7b$$u7b$closure$u7d$$u7d$::h8a361d146598324b + 349
    frame #110: 0x00000001078a5093 librustc_driver-5791a7e91c818ec7.dylib`rustc_driver::catch_fatal_errors::hc2462c91b0e18741 + 67
    frame #111: 0x0000000107971791 librustc_driver-5791a7e91c818ec7.dylib`rustc_driver::main::h6998d2801938dfbd + 97
    frame #112: 0x000000010206cd3f rustc`rustc_binary::main::hcd0c3f1a87459fb9 + 15
[...]

[bjorn3]

The problem is UnOp::Neg not being implemented for i128.

[bjorn3]

thread 'main' panicked at 'not yet implemented', /Users/bjorn/.cargo/registry/src/github.tiyicn.workers.dev-1ecc6299db9ec823/c2-chacha-0.2.2/src/guts.rs:260:1

Filled cryptocorrosion/cryptocorrosion#25 for running without SIMD.

[bjorn3]

Pushed 6129921 with some fixes necessary for this.

[bjorn3]

libcore compiled by patching c2-chacha to not passthrough the simd feature to ppv-lite86.

Now there are two const_err's which don't make sense:

[...]
error: any use of this value will cause an error
   --> src/liballoc/raw_vec.rs:145:18
    |
127 |     pub const NEW: Self = Self::new();
    |     ----------------------------------
...
145 |             cap: [0, !0][(mem::size_of::<T>() == 0) as usize],
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |                  |
    |                  index out of bounds: the len is 2 but the index is 0
    |                  inside call to `raw_vec::RawVec::<u8>::new` at src/liballoc/raw_vec.rs:127:27
    |
    = note: `#[deny(const_err)]` on by default

fatal runtime error: failed to initiate panic, error 5
error: could not compile `alloc`.

Caused by:
  process didn't exit successfully: `/Users/bjorn/Documents/rustc_codegen_cranelift/rust/build/bootstrap/debug/rustc --edition=2018 --crate-name alloc src/liballoc/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=2 -C debuginfo=0 --cfg 'feature="compiler-builtins-c"' -C metadata=597966ce1b444f59 -C extra-filename=-597966ce1b444f59 --out-dir /Users/bjorn/Documents/rustc_codegen_cranelift/rust/build/x86_64-apple-darwin/stage1-std/x86_64-apple-darwin/release/deps --target x86_64-apple-darwin -L dependency=/Users/bjorn/Documents/rustc_codegen_cranelift/rust/build/x86_64-apple-darwin/stage1-std/x86_64-apple-darwin/release/deps -L dependency=/Users/bjorn/Documents/rustc_codegen_cranelift/rust/build/x86_64-apple-darwin/stage1-std/release/deps --extern compiler_builtins=/Users/bjorn/Documents/rustc_codegen_cranelift/rust/build/x86_64-apple-darwin/stage1-std/x86_64-apple-darwin/release/deps/libcompiler_builtins-259284571ab1a5fb.rmeta --extern core=/Users/bjorn/Documents/rustc_codegen_cranelift/rust/build/x86_64-apple-darwin/stage1-std/x86_64-apple-darwin/release/deps/libcore-7f5c6d7d2df26804.rmeta -Zexternal-macro-backtrace -Zosx-rpath-install-name '-Clink-args=-Wl,-rpath,@loader_path/../lib' -Wrust_2018_idioms -Wunused_lifetimes -Cprefer-dynamic -Zbinary-dep-depinfo -L native=/Users/bjorn/Documents/rustc_codegen_cranelift/rust/build/x86_64-apple-darwin/stage1-std/x86_64-apple-darwin/release/build/compiler_builtins-f2fb94987d72e611/out` (signal: 6, SIGABRT: process abort signal)
warning: build failed, waiting for other jobs to finish...
error: this expression will panic at runtime
   --> src/libpanic_unwind/gcc.rs:156:25
    |
156 |     if actions as i32 & uw::_UA_SEARCH_PHASE as i32 != 0 {
    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to add with overflow
    |
    = note: `#[deny(const_err)]` on by default

fatal runtime error: failed to initiate panic, error 5
error: could not compile `panic_unwind`.
[...]

[bjorn3]

Marked as bug because of the impossible const_err's.

[bjorn3]

I got rustc bootstrapping using cg_clif. Unfortunately the rustc built using cg_clif crashes when you try to use it. So far I have been able to pin point that make_input returns an io::Error. When trying to .to_string() it it turns out that the io::Error has an invalid discriminant.

Rust fork: bjorn3/rust@e5c3091 (branch cg_clif_subtree)
cg_clif commit: bjorn3@f7eb360 (branch wip_proc_macro_fixes, clone it to src/rustc_codegen_cranelift in the rust source repo)
Cranelift commit: bjorn3/wasmtime@2d60da4 (pr bytecodealliance/wasmtime#1559, clone it to the parent dir of the rust repo, or edit Cargo.toml of the rust repo to point to it in the patch section)

config.toml:

[rust]
codegen-backends = ["cranelift"]
deny-warnings = false

[bjorn3]

Rust fork: bjorn3/rust@42728c0
cg_clif commit: bjorn3@4a48a39
Cranelift commit: bjorn3/wasmtime@abe0381 (pr bytecodealliance/wasmtime#1559, clone it to the parent dir of the rust repo, or edit Cargo.toml of the rust repo to point to it in the patch section)

Edit has_cpuid in corearch to always return false.

config.toml:

[build]
full-bootstrap = true
[rust]
codegen-backends = ["cranelift"]
deny-warnings = false

Current failure:

error: internal compiler error: src/librustc_mir_build/build/matches/test.rs:227:34: expected boolean value but got 1
   --> src/libcore/iter/adapters/mod.rs:566:22
    |
566 |             move |n| if n == 0 { 0 } else { 1 + (n - 1) / (step + 1) }
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

thread 'rustc' panicked at 'Box<Any>', /home/bjorn/Documenten/rust/src/libstd/macros.rs:13:23
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
   1: backtrace::backtrace::trace_unsynchronized
   2: std::sys_common::backtrace::_print_fmt
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
   4: core::fmt::write
   5: std::io::Write::write_fmt
   6: std::sys_common::backtrace::_print
   7: std::sys_common::backtrace::print
   8: std::panicking::default_hook::{{closure}}
   9: std::panicking::default_hook
  10: core::ops::function::Fn::call
  11: <alloc::boxed::Box<F> as core::ops::function::Fn<A>>::call
             at ./src/liballoc/boxed.rs:1092
  12: rustc_driver::report_ice
             at src/librustc_driver/lib.rs:1162
  13: <rustc_driver::DEFAULT_HOOK as core::ops::deref::Deref>::deref::__static_ref_initialize::{{closure}}
             at src/librustc_driver/lib.rs:1149
  14: std::panicking::rust_panic_with_hook
  15: std::panicking::begin_panic
             at ./src/libstd/panicking.rs:450
  16: rustc_errors::HandlerInner::span_bug
             at ./src/libstd/macros.rs:13
  17: rustc_errors::Handler::span_bug
             at ./src/librustc_errors/lib.rs:622
  18: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
             at ./src/librustc_middle/util/bug.rs:32
  19: rustc_middle::ty::context::tls::with_opt::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1848
  20: rustc_middle::ty::context::tls::with_context_opt
             at ./src/librustc_middle/ty/context.rs:1800
  21: rustc_middle::ty::context::tls::with_opt
             at ./src/librustc_middle/ty/context.rs:1848
  22: rustc_middle::util::bug::opt_span_bug_fmt
             at ./src/librustc_middle/util/bug.rs:29
  23: rustc_middle::util::bug::span_bug_fmt
             at ./src/librustc_middle/util/bug.rs:21
  24: rustc_mir_build::build::matches::test::<impl rustc_mir_build::build::Builder>::perform_test
             at src/librustc_mir_build/build/matches/test.rs:227
  25: rustc_mir_build::build::matches::<impl rustc_mir_build::build::Builder>::test_candidates
             at src/librustc_mir_build/build/matches/mod.rs:1502
  26: rustc_mir_build::build::matches::<impl rustc_mir_build::build::Builder>::test_candidates_with_or
             at src/librustc_mir_build/build/matches/mod.rs:1163
  27: rustc_mir_build::build::matches::<impl rustc_mir_build::build::Builder>::match_simplified_candidates
             at src/librustc_mir_build/build/matches/mod.rs:986
  28: rustc_mir_build::build::matches::<impl rustc_mir_build::build::Builder>::match_candidates::{{closure}}
             at src/librustc_mir_build/build/matches/mod.rs:929
  29: stacker::maybe_grow
             at /home/bjorn/.cargo/registry/src/github.tiyicn.workers.dev-1ecc6299db9ec823/stacker-0.1.9/src/lib.rs:52
  30: rustc_data_structures::stack::ensure_sufficient_stack
             at ./src/librustc_data_structures/stack.rs:16
  31: rustc_mir_build::build::matches::<impl rustc_mir_build::build::Builder>::match_candidates
             at src/librustc_mir_build/build/matches/mod.rs:912
  32: rustc_mir_build::build::matches::<impl rustc_mir_build::build::Builder>::lower_match_tree
             at src/librustc_mir_build/build/matches/mod.rs:184
  33: rustc_mir_build::build::matches::<impl rustc_mir_build::build::Builder>::match_expr
             at src/librustc_mir_build/build/matches/mod.rs:103
  34: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
             at src/librustc_mir_build/build/expr/into.rs:52
  35: <rustc_mir_build::hair::ExprRef as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:42
  36: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
  37: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr::{{closure}}
             at src/librustc_mir_build/build/expr/into.rs:46
  38: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
  39: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
             at src/librustc_mir_build/build/expr/into.rs:46
  40: <rustc_mir_build::hair::ExprRef as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:42
  41: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
  42: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr::{{closure}}
             at src/librustc_mir_build/build/expr/into.rs:46
  43: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
  44: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
             at src/librustc_mir_build/build/expr/into.rs:46
  45: <rustc_mir_build::hair::Expr as rustc_mir_build::build::into::EvalInto>::eval_into
             at src/librustc_mir_build/build/into.rs:53
  46: rustc_mir_build::build::into::<impl rustc_mir_build::build::Builder>::into
             at src/librustc_mir_build/build/into.rs:30
  47: rustc_mir_build::build::Builder::args_and_body
             at src/librustc_mir_build/build/mod.rs:949
  48: rustc_mir_build::build::construct_fn::{{closure}}::{{closure}}::{{closure}}
             at src/librustc_mir_build/build/mod.rs:612
  49: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
  50: rustc_mir_build::build::construct_fn::{{closure}}::{{closure}}
             at src/librustc_mir_build/build/mod.rs:611
  51: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_breakable_scope
             at src/librustc_mir_build/build/scope.rs:392
  52: rustc_mir_build::build::construct_fn::{{closure}}
             at src/librustc_mir_build/build/mod.rs:606
  53: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
             at src/librustc_mir_build/build/scope.rs:455
  54: rustc_mir_build::build::construct_fn
             at src/librustc_mir_build/build/mod.rs:597
  55: rustc_mir_build::build::mir_build::{{closure}}
             at src/librustc_mir_build/build/mod.rs:154
  56: rustc_infer::infer::InferCtxtBuilder::enter::{{closure}}
             at ./src/librustc_infer/infer/mod.rs:622
  57: rustc_middle::ty::context::GlobalCtxt::enter_local::{{closure}}::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1573
  58: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1739
  59: rustc_middle::ty::context::tls::set_tlv
             at ./src/librustc_middle/ty/context.rs:1723
  60: rustc_middle::ty::context::tls::enter_context
             at ./src/librustc_middle/ty/context.rs:1739
  61: rustc_middle::ty::context::GlobalCtxt::enter_local::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1573
  62: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1827
  63: rustc_middle::ty::context::tls::with_context::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1811
  64: rustc_middle::ty::context::tls::with_context_opt
             at ./src/librustc_middle/ty/context.rs:1800
  65: rustc_middle::ty::context::tls::with_context
             at ./src/librustc_middle/ty/context.rs:1811
  66: rustc_middle::ty::context::tls::with_related_context
             at ./src/librustc_middle/ty/context.rs:1824
  67: rustc_middle::ty::context::GlobalCtxt::enter_local
             at ./src/librustc_middle/ty/context.rs:1565
  68: rustc_infer::infer::InferCtxtBuilder::enter
             at ./src/librustc_infer/infer/mod.rs:621
  69: rustc_mir_build::build::mir_build
             at src/librustc_mir_build/build/mod.rs:63
  70: rustc_mir_build::build::mir_built
             at src/librustc_mir_build/build/mod.rs:25
  71: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_built>::compute
             at ./src/librustc_middle/ty/query/plumbing.rs:362
  72: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
             at ./src/librustc_query_system/dep_graph/graph.rs:303
  73: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task
             at ./src/librustc_query_system/dep_graph/graph.rs:200
  74: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}::{{closure}}
             at ./src/librustc_query_system/query/plumbing.rs:599
  75: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}::{{closure}}
             at ./src/librustc_middle/ty/query/plumbing.rs:72
  76: stacker::maybe_grow
             at /home/bjorn/.cargo/registry/src/github.tiyicn.workers.dev-1ecc6299db9ec823/stacker-0.1.9/src/lib.rs:52
  77: rustc_data_structures::stack::ensure_sufficient_stack
             at ./src/librustc_data_structures/stack.rs:16
  78: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}
             at ./src/librustc_middle/ty/query/plumbing.rs:72
  79: rustc_middle::ty::context::tls::enter_context::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1739
  80: rustc_middle::ty::context::tls::set_tlv
             at ./src/librustc_middle/ty/context.rs:1723
  81: rustc_middle::ty::context::tls::enter_context
             at ./src/librustc_middle/ty/context.rs:1739
  82: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}
             at ./src/librustc_middle/ty/query/plumbing.rs:71
  83: rustc_middle::ty::context::tls::with_related_context::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1827
  84: rustc_middle::ty::context::tls::with_context::{{closure}}
             at ./src/librustc_middle/ty/context.rs:1811
  85: rustc_middle::ty::context::tls::with_context_opt
             at ./src/librustc_middle/ty/context.rs:1800
  86: rustc_middle::ty::context::tls::with_context
             at ./src/librustc_middle/ty/context.rs:1811
  87: rustc_middle::ty::context::tls::with_related_context
             at ./src/librustc_middle/ty/context.rs:1824
  88: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query
             at ./src/librustc_middle/ty/query/plumbing.rs:60
  89: rustc_query_system::query::plumbing::force_query_with_job::{{closure}}
             at ./src/librustc_query_system/query/plumbing.rs:589
  90: rustc_query_system::query::plumbing::with_diagnostics
             at ./src/librustc_query_system/query/plumbing.rs:296
  91: rustc_query_system::query::plumbing::force_query_with_job
             at ./src/librustc_query_system/query/plumbing.rs:588
  92: rustc_query_system::query::plumbing::try_execute_query
             at ./src/librustc_query_system/query/plumbing.rs:415
  93: rustc_query_system::query::plumbing::get_query_impl::{{closure}}
             at ./src/librustc_query_system/query/plumbing.rs:639
  94: <rustc_query_system::query::caches::ArenaCache<K,V> as rustc_query_system::query::caches::QueryCache>::lookup
             at ./src/librustc_query_system/query/caches.rs:193
  95: rustc_query_system::query::plumbing::try_get_cached
             at ./src/librustc_query_system/query/plumbing.rs:369
  96: rustc_query_system::query::plumbing::get_query_impl
             at ./src/librustc_query_system/query/plumbing.rs:631
  97: rustc_query_system::query::plumbing::get_query
             at ./src/librustc_query_system/query/plumbing.rs:731
  98: rustc_middle::ty::query::TyCtxtAt::mir_built
             at ./src/librustc_middle/ty/query/plumbing.rs:472
  99: rustc_middle::ty::query::<impl rustc_middle::ty::context::TyCtxt>::mir_built
             at ./src/librustc_middle/ty/query/plumbing.rs:433
 100: rustc_mir::transform::check_unsafety::unsafety_check_result
             at src/librustc_mir/transform/check_unsafety.rs:543
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.46.0-dev running on x86_64-unknown-linux-gnu

note: compiler flags: -Z macro-backtrace -Z binary-dep-depinfo -Z force-unstable-if-unmarked -C opt-level=3 -C embed-bitcode=no -C debuginfo=0 -C link-args=-Wl,-rpath,$ORIGIN/../lib -C prefer-dynamic -C embed-bitcode=yes -C link-arg=-rdynamic -C debug-assertions=n --crate-type lib

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [mir_built] building MIR for `<iter::adapters::StepBy<I> as iter::traits::iterator::Iterator>::size_hint::first_size::{{closure}}#0`
#1 [unsafety_check_result] unsafety-checking `<iter::adapters::StepBy<I> as iter::traits::iterator::Iterator>::size_hint::first_size::{{closure}}#0`
#2 [unsafety_check_result] unsafety-checking `<iter::adapters::StepBy<I> as iter::traits::iterator::Iterator>::size_hint::first_size`
#3 [mir_const] processing MIR for `<iter::adapters::StepBy<I> as iter::traits::iterator::Iterator>::size_hint::first_size`
#4 [mir_validated] processing `<iter::adapters::StepBy<I> as iter::traits::iterator::Iterator>::size_hint::first_size`
#5 [mir_borrowck] borrow-checking `<iter::adapters::StepBy<I> as iter::traits::iterator::Iterator>::size_hint::first_size`
#6 [type_of] computing type of `<iter::adapters::StepBy<I> as iter::traits::iterator::Iterator>::size_hint::first_size::{{opaque}}#0`
#7 [check_mod_item_types] checking item types in module `iter::adapters`
#8 [analysis] running analysis passes on this crate
end of query stack
fatal runtime error: failed to initiate panic, error 5
error: could not compile `core`.

[bjorn3]

The ICE happens at https://github.com/bjorn3/rust/blob/42728c0730229daad922372f76e08f5e40c31aa1/src/librustc_mir_build/build/matches/test.rs#L227. I am probably handling matching on u128 wrong.

[bjorn3]

Minimal repro for ICE:

fn is_true(a: true) -> u8 {
    if a { 1 } else { 0 }
}

[bjorn3]

Minimal miscompilation repro:

fn main() {
    let options = [1u128];
    match options[0] {
        1 => (),
        0 => loop {},
        v => panic(v),
    };
}

fn panic(v: u128) -> !{
    panic!("{}", v)
}

clif ir for `main`

test compile
set is_pic
target x86_64-unknown-linux-gnu

function u0:2() system_v {
    ss0 = explicit_slot 16
    gv0 = symbol colocated u1:0
    sig0 = (i128) system_v
    sig1 = (i64) -> i32 system_v
    fn0 = colocated u0:7 sig0
    fn1 = u0:13 sig1
    jt0 = jump_table [block4, block3]

                                block0:
                                    nop 
                                    jump block1

                                block1:
                                    nop 
@0001                               v0 = iconst.i64 1
@0001                               v1 = iconst.i64 0
@0001                               v2 = iconcat v0, v1
@0001                               v3 = iconst.i64 0
@0001                               v4 = imul_imm v3, 16
@0001                               v5 = stack_addr.i64 ss0
@0001                               v6 = iadd v5, v4
@0001                               store v2, v6
@0002                               v7 = iconst.i64 0
                                    v12 -> v7
@0003                               v8 = imul_imm v7, 16
@0003                               v9 = stack_addr.i64 ss0
@0003                               v10 = iadd v9, v8
@0003                               v11 = load.i128 v10
@0003                               jump block6

                                block6:
@0003                               br_table.i128 v11, block2, jt0

                                block2:
@0003                               nop 
@0004                               v13 = imul_imm.i64 v12, 16
@0004                               v14 = stack_addr.i64 ss0
@0004                               v15 = iadd v14, v13
@0004                               v16 = load.i128 v15
@0006                               call fn0(v16)
@0006                               v17 = global_value.i64 gv0
@0006                               v18 = call fn1(v17)
@0006                               trap unreachable

                                block3:
@0006                               nop 
@0008                               v19 = iconst.i64 8
@000a                               return

                                block4:
@000a                               nop 
@000b                               jump block5

                                block5:
@000b                               nop 
@000b                               jump block5
}

[bjorn3]

Got to metadata writing with the miscompilation fixed. It panicked in ppv-lite86. Currently recompiling with the simd feature of ppv-lite86 disabled.

[bjorn3]

It finally works! 🎉 🎈 🚀 🎈 🎉

Rust fork: bjorn3/rust@9a1facc
cg_clif commit: 8051242
Cranelift commit: bjorn3/wasmtime@430ab52 merge bjorn3/wasmtime@8fbde92 and bjorn3/wasmtime@ed0495c (pr bytecodealliance/wasmtime#1559 + pr bytecodealliance/wasmtime#1939 (merged), clone it to the parent dir of the rust repo, or edit Cargo.toml of the rust repo to point to it in the patch section)

Edit has_cpuid in corearch to always return false.
Clone https://github.com/cryptocorrosion/cryptocorrosion/ into the cg_clif dir and patch utils-simd/ppv-lite86/src/lib.rs to always user the fallback implementation and never the SIMD implementation.

config.toml:

[build]
full-bootstrap = true
[rust]
codegen-backends = ["cranelift"]
deny-warnings = false

Build completed successfully in 2:57:19