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33 lines
780 B
Rust
33 lines
780 B
Rust
// compile-flags: -O
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// only-64bit (because the LLVM type of i64 for usize shows up)
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// ignore-debug: the debug assertions get in the way
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#![crate_type = "lib"]
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#![feature(slice_as_chunks)]
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// CHECK-LABEL: @chunks4
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#[no_mangle]
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pub fn chunks4(x: &[u8]) -> &[[u8; 4]] {
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// CHECK-NEXT: start:
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// CHECK-NEXT: lshr i64 %x.1, 2
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// CHECK-NOT: shl
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// CHECK-NOT: mul
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// CHECK-NOT: udiv
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// CHECK-NOT: urem
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// CHECK: ret
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x.as_chunks().0
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}
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// CHECK-LABEL: @chunks4_with_remainder
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#[no_mangle]
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pub fn chunks4_with_remainder(x: &[u8]) -> (&[[u8; 4]], &[u8]) {
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// CHECK-DAG: and i64 %x.1, -4
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// CHECK-DAG: and i64 %x.1, 3
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// CHECK-DAG: lshr
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// CHECK-NOT: mul
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// CHECK-NOT: udiv
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// CHECK-NOT: urem
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// CHECK: ret
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x.as_chunks()
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}
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