cb48ea406e
This PR switches the default backend on x86, for both the `cranelift-codegen` crate and for Wasmtime, to the new (`MachInst`-style, `VCode`-based) backend that has been under development and testing for some time now. The old backend is still available by default in builds with the `old-x86-backend` feature, or by requesting `BackendVariant::Legacy` from the appropriate APIs. As part of that switch, it adds some more runtime-configurable plumbing to the testing infrastructure so that tests can be run using the appropriate backend. `clif-util test` is now capable of parsing a backend selector option from filetests and instantiating the correct backend. CI has been updated so that the old x86 backend continues to run its tests, just as we used to run the new x64 backend separately. At some point, we will remove the old x86 backend entirely, once we are satisfied that the new backend has not caused any unforeseen issues and we do not need to revert.
40 lines
935 B
Plaintext
40 lines
935 B
Plaintext
test regalloc
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target i686 legacy haswell
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function %pr165() system_v {
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block0:
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v0 = iconst.i32 0x0102_0304
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v1 = iconst.i32 0x1102_0304
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v2 = iconst.i32 0x2102_0304
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v20 = ishl v1, v0
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v21 = ishl v2, v0
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v22 = sshr v1, v0
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v23 = sshr v2, v0
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v24 = ushr v1, v0
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v25 = ushr v2, v0
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istore8 v0, v1+0x2710
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istore8 v1, v0+0x2710
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return
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}
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; Same as above, but use so many registers that spilling is required.
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; Note: This is also a candidate for using xchg instructions.
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function %emergency_spill() system_v {
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block0:
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v0 = iconst.i32 0x0102_0304
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v1 = iconst.i32 0x1102_0304
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v2 = iconst.i32 0x2102_0304
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v3 = iconst.i32 0x3102_0304
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v4 = iconst.i32 0x4102_0304
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v20 = ishl v1, v0
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v21 = ishl v2, v3
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v22 = sshr v1, v0
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v23 = sshr v2, v0
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v24 = ushr v1, v0
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v25 = ushr v2, v0
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istore8 v0, v1+0x2710
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istore8 v1, v0+0x2710
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istore8 v3, v4+0x2710
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return
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}
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