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			17 lines
		
	
	
		
			301 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
			
		
		
	
	
			17 lines
		
	
	
		
			301 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
| // Guards against regression for optimization discussed in issue #80836
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| 
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| //@ compile-flags: -O
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| 
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| #![crate_type = "lib"]
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| 
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| use std::collections::VecDeque;
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| 
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| // CHECK-LABEL: @front
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| // CHECK: ret void
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| #[no_mangle]
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| pub fn front(v: VecDeque<usize>) {
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|     if !v.is_empty() {
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|         v.get(0).unwrap();
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|     }
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| }
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