48 lines
1.1 KiB
LLVM
48 lines
1.1 KiB
LLVM
%arr = type [5 x i64]
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@glb_arr = global %arr [i64 1, i64 1, i64 4, i64 3, i64 3]
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define i64 @singleNumber(%arr* %myarr, i64 %size)
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{
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%result = alloca i64
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store i64 0, i64* %result
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%index = alloca i64
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store i64 0, i64* %index
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br label %loop
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loop:
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%l_idx = load i64, i64* %index
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%idx_check = icmp slt i64 %l_idx, %size
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br i1 %idx_check, label %compute, label %ret_ext
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compute:
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%compute_index = load i64, i64* %index
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%elem = getelementptr %arr, %arr* %myarr, i32 0, i32 %compute_index
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%new_elem = load i64, i64* %elem
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%temp_res = load i64, i64* %result
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%new_res = xor i64 %new_elem, %temp_res
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store i64 %new_res, i64* %result
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br label %loop_inc
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loop_inc:
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%inc_idx = load i64, i64* %index
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%new_idx = add i64 %inc_idx, 1
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store i64 %new_idx, i64* %index
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br label %loop
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ret_ext:
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%return_val = load i64, i64* %result
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ret i64 %return_val
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}
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define i64 @main(i64 %argc, i8** %argv){
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; Expected Return Value 4
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; This function XORs the elements of the array to find single unique element
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; Second argument is size of the array
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%ans = call i64 @singleNumber(%arr* @glb_arr, i64 5)
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ret i64 %ans
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}
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