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35a485ddd8
Normally LLVM and rustc agree about what features are implied by
target-cpu, but for NVPTX, LLVM considers sm_* and ptx* features to be
exclusive, which makes sense for codegen purposes. But in Rust, we want
to think of them as:
sm_{sver} means that the target supports the hardware features of sver
ptx{pver} means the driver supports PTX ISA pver
Intrinsics usually require a minimum sm_{sver} and ptx{pver}.
Prior to this commit, -Ctarget-cpu=sm_70 would activate only sm_70 and
ptx60 (the minimum PTX version that supports sm_70, which maximizes
driver compatibility). With this commit, it also activates all the
implied target features (sm_20, ..., sm_62; ptx32, ..., ptx50).
29 lines
885 B
Rust
29 lines
885 B
Rust
//@ assembly-output: ptx-linker
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//@ compile-flags: --crate-type cdylib -C target-cpu=sm_80 -Z unstable-options -Clinker-flavor=llbc
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//@ only-nvptx64
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//@ build-pass
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#![no_std]
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#![allow(dead_code)]
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#[panic_handler]
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pub fn panic(_info: &core::panic::PanicInfo) -> ! {
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loop {}
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}
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// -Ctarget-cpu=sm_80 directly enables sm_80 and ptx70
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#[cfg(not(all(target_feature = "sm_80", target_feature = "ptx70")))]
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compile_error!("direct target features not enabled");
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// -Ctarget-cpu=sm_80 implies all earlier sm_* and ptx* features.
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#[cfg(not(all(
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target_feature = "sm_60",
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target_feature = "sm_70",
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target_feature = "ptx50",
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target_feature = "ptx60",
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)))]
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compile_error!("implied target features not enabled");
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// -Ctarget-cpu=sm_80 implies all earlier sm_* and ptx* features.
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#[cfg(target_feature = "ptx71")]
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compile_error!("sm_80 requires only ptx70, but ptx71 enabled");
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