Rather than using paths from the root instruction to the instruction we are
matching against or checking if it is constant or whatever, use temporary
variables. When we successfully match an instruction's opcode, we simultaneously
define these temporaries for the instruction's operands. This is similar to how
open-coding these matches in Rust would use `match` expressions with pattern
matching to bind the operands to variables at the same time.
This saves about 1.8% of instructions retired when Peepmatic is enabled.
This commit splits "increments" in two; they previously contained both the
linearized left- and right-hand sides. But only the first increment ever had any
actions, so it was confusing (and space wasting) that all increments had an
"actions" vector. No more!
This commit separates the linearized left-hand side ("matches") from the
linearized right-hand side ("actions").
While the goal is definitely still Cranelift focused, (a) this should be obvious
based on the fact that this is nested under the `cranelift/` directory, and (b)
Peepmatic *is* now generic over the IR it is optimizing, so it could potentially
be used on (say) rustc's MIR now.
This adds a new feature experimental_x64 for CLIF tests.
A test is run in the new x64 backend iff:
- either the test doesn't have an x86_64 target requirement, signaling
it must be target agnostic or not run on this target.
- or the test does require the x86_64 target, and the test is marked
with the `experimental_x64` feature.
This required one workaround in the parser. The reason is that the
parser will try to use information not provided by the TargetIsa adapter
for the Mach backends, like register names. In particular, parsing test
may fail before the test runner realizes that the test must not be run.
In this case, we early return an almost-empty TestFile from the parser,
under the same conditions as above, so that the caller may filter out
the test properly.
This also copies two tests from the test suite using the new backend,
for demonstration purposes.
According to wasm's spec, nearest must do the following, for NaN inputs:
- when the input is a canonical NaN, return a canonical NaN;
- when the input is a non-canonical NaN, return an arithmetic NaN.
This patch adds checks when the exponent is all ones if the input was a
NaN, and will set the significand's most significant bit in that case.
It works both for canonical inputs (which already had the bit set) and
makes other NaN inputs canonical.
This commit adds arm32 code generation for some IR insts.
Floating-point instructions are not supported, because regalloc
does not allow to represent overlapping register classes,
which are needed by VFP/Neon.
There is also no support for big-endianness, I64 and I128 types.
* clif-util: do not convert `anyhow::Error`s into strings into `anyhow::Error`s
* filetests: Use the debug formatting of `anyhow::Error`s
This provides the full error context, not just the source error's message.
