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source_filename = "if_test.sy"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"
@a = dso_local global i32 0, align 4
define dso_local i32 @main() {
store i32 10, i32* @a, align 4 ; 相当于a=10
%1 = load i32, i32* @a, align 4
%2 = icmp sgt i32 %1, 0 ; %2（a）和a比较
br i1 %2, label %3, label %5 ; %4代表真，%6代表假
3:
%4 = load i32, i32* @a, align 4
ret i32 %4 ; 预测为真，返回a
5:
ret i32 0 ; 返回0
}
