This halfway solves a test failure: when temporarily disabling another
assert that is triggered by lack of debug info, this causes the
`custom_trap_handler` test to pass.
Includes a temporary bugfix for popcnt with 32-bit operand. The popcnt
issue was initially identified by Benjamin Bouvier <public@benj.me>, and
the root cause was debugged by Joey Gouly <joey.gouly@arm.com>. This
patch is simply a quick fix that zero-extends the operand to 64 bits;
Joey plans to contribute a more permanent fix shortly (tracked in
#1537).
- Undo temporary changes to default features (`all-arch`) and a
signal-handler test.
- Remove `SIGTRAP` handler: no longer needed now that we've found an
"undefined opcode" option on ARM64.
- Rename pp.rs to pretty_print.rs in machinst/.
- Only use empty stack-probe on non-x86. As per a comment in
rust-lang/compiler-builtins [1], LLVM only supports stack probes on
x86 and x86-64. Thus, on any other CPU architecture, we cannot refer
to `__rust_probestack`, because it does not exist.
- Rename arm64 to aarch64.
- Use `target` directive in vcode filetests.
- Run the flags verifier, but without encinfo, when using new backends.
- Clean up warning overrides.
- Fix up use of casts: use u32::from(x) and siblings when possible,
u32::try_from(x).unwrap() when not, to avoid silent truncation.
- Take immutable `Function` borrows as input; we don't actually
mutate the input IR.
- Lots of other miscellaneous cleanups.
[1] cae3e6ea23/src/probestack.rs (L39)
