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52 lines
1.6 KiB
52 lines
1.6 KiB
1 year ago
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; 中间代码头部尾部参考clang -S -emit-llvm 生成结果
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; ModuleID = 'func_test.c'
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source_filename = "func_test.c"
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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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define dso_local i32 @add(i32 %0, i32 %1) #0 {
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%3 = alloca i32, align 4
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store i32 %0, i32* %3, align 4 ; alloca a
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%4 = alloca i32, align 4
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store i32 %1, i32* %4, align 4 ; alloca b
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%5 = load i32, i32* %3, align 4
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%6 = load i32, i32* %4, align 4
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%7 = add nsw i32 %5, %6 ; a+b
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%8 = sub nsw i32 %7, 1 ; a+b-1
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ret i32 %8 ; return a+b-1
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}
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define dso_local i32 @main() #0 {
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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store i32 3, i32* %1, align 4 ; a=3
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store i32 2, i32* %2, align 4 ; b=2
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store i32 5, i32* %3, align 4 ; c=5
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%4 = load i32, i32* %1, align 4
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%5 = load i32, i32* %2, align 4
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%6 = load i32, i32* %3, align 4
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%7 = call i32 @add(i32 %4, i32 %5) ; add(a, b)
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%8 = add nsw i32 %6, %7 ; c+add(a,b)
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ret i32 %8
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}
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attributes #0 = { noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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!llvm.module.flags = !{!0, !1, !2, !3, !4}
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!llvm.ident = !{!5}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 7, !"PIC Level", i32 2}
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!2 = !{i32 7, !"PIE Level", i32 2}
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!3 = !{i32 7, !"uwtable", i32 1}
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!4 = !{i32 7, !"frame-pointer", i32 2}
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!5 = !{!"Ubuntu clang version 14.0.0-1ubuntu1.1"}
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