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source_filename = "assign_test.sy"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-linux-gnu"
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; 配置信息
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define dso_local i32 @main() { ; 定义主函数
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%1 = alloca float, align 4 ; 分配一个float, 相当于b
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%2 = alloca [2 x i32], align 4 ; 分配两个i32，相当于a[2]
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store float 0x3FFCCCCCC0000000, float* %1, align 4 ; 相当于b=1.8，用二进制表示1.8
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%3 = getelementptr [2 x i32], [2 x i32]* %2, i64 0, i64 0 ; 获得%2的第0个元素的指针，下同
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store i32 2, i32* %3 ; 将这个值赋给2，即a[0]=2，相当于a[2]={2}。
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%4 = getelementptr [2 x i32], [2 x i32]* %2, i64 0, i64 0
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%5 = load i32, i32* %4, align 4
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%6 = sitofp i32 %5 to float ; 把%5（也就是a[0]）转成float
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%7 = load float, float* %1, align 4
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%8 = fmul float %6, %7
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%9 = fptosi float %8 to i32 ; 把%8（也就是a[0]*b）转成i32
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%10 = getelementptr [2 x i32], [2 x i32]* %2, i64 0, i64 1 ; 获得%2的第1个元素的指针，下同
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store i32 %9, i32* %10, align 4 ; 把%9的结果存储在%10（即a[1]中）
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%11 = getelementptr [2 x i32], [2 x i32]* %2, i64 0, i64 1
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%12 = load i32, i32* %11, align 4 ; 读出%10（即a[1]）的值
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ret i32 %12 ; main 返回
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}
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