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17 lines
528 B
Rust
17 lines
528 B
Rust
//@ only-x86_64
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//@ compile-flags: -C opt-level=3 -C target-cpu=x86-64
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#![crate_type = "lib"]
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/// Check that the fast-path of `is_ascii` uses a `pmovmskb` instruction.
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/// Platforms lacking an equivalent instruction use other techniques for
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/// optimizing `is_ascii`.
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// CHECK-LABEL: @is_ascii_autovectorized
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#[no_mangle]
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pub fn is_ascii_autovectorized(s: &[u8]) -> bool {
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// CHECK: load <32 x i8>
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// CHECK-NEXT: icmp slt <32 x i8>
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// CHECK-NEXT: bitcast <32 x i1>
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// CHECK-NEXT: icmp eq i32
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s.is_ascii()
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}
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