rust/src/test/codegen/repeat-trusted-len.rs

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// compile-flags: -O
//
#![crate_type = "lib"]
use std::iter;
// CHECK-LABEL: @repeat_take_collect
#[no_mangle]
pub fn repeat_take_collect() -> Vec<u8> {
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// CHECK: call void @llvm.memset.p0i8.i{{[0-9]+}}(i8* {{(nonnull )?}}align 1{{.*}} %{{[0-9]+}}, i8 42, i{{[0-9]+}} 100000, i1 false)
iter::repeat(42).take(100000).collect()
}