102 lines
3.8 KiB
Plaintext
102 lines
3.8 KiB
Plaintext
; ModuleID = 'fizzbuzz.c'
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; source_filename = "fizzbuzz.c"
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; target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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; target triple = "x86_64-pc-windows-msvc19.21.27702"
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; This is not strictly LLVM, as it uses the C library function "printf".
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; LLVM does not provide a way to print values, so the alternative would be
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; to just load the string into memory, and that would be boring.
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; Additional comments have been inserted, as well as changes made from the output produced by clang such as putting more meaningful labels for the jumps
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$"\01??_C@_09NODAFEIA@FizzBuzz?6?$AA@" = comdat any
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$"\01??_C@_05KEBFOHOF@Fizz?6?$AA@" = comdat any
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$"\01??_C@_05JKJENPHA@Buzz?6?$AA@" = comdat any
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$"\01??_C@_03PMGGPEJJ@?$CFd?6?$AA@" = comdat any
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;--- String constant defintions
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@"\01??_C@_09NODAFEIA@FizzBuzz?6?$AA@" = linkonce_odr unnamed_addr constant [10 x i8] c"FizzBuzz\0A\00", comdat, align 1
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@"\01??_C@_05KEBFOHOF@Fizz?6?$AA@" = linkonce_odr unnamed_addr constant [6 x i8] c"Fizz\0A\00", comdat, align 1
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@"\01??_C@_05JKJENPHA@Buzz?6?$AA@" = linkonce_odr unnamed_addr constant [6 x i8] c"Buzz\0A\00", comdat, align 1
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@"\01??_C@_03PMGGPEJJ@?$CFd?6?$AA@" = linkonce_odr unnamed_addr constant [4 x i8] c"%d\0A\00", comdat, align 1
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;--- The declaration for the external C printf function.
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declare i32 @printf(i8*, ...)
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; Function Attrs: noinline nounwind optnone uwtable
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define i32 @main() #0 {
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%1 = alloca i32, align 4
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store i32 1, i32* %1, align 4
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;--- It does not seem like this branch can be removed
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br label %loop
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;--- while (i <= 100)
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loop:
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%2 = load i32, i32* %1, align 4
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%3 = icmp sle i32 %2, 100
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br i1 %3, label %divisible_15, label %finished
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;--- if (i % 15 == 0)
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divisible_15:
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%4 = load i32, i32* %1, align 4
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%5 = srem i32 %4, 15
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%6 = icmp eq i32 %5, 0
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br i1 %6, label %print_fizzbuzz, label %divisible_3
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;--- Print 'FizzBuzz'
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print_fizzbuzz:
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%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @"\01??_C@_09NODAFEIA@FizzBuzz?6?$AA@", i32 0, i32 0))
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br label %next
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;--- if (i % 3 == 0)
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divisible_3:
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%8 = load i32, i32* %1, align 4
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%9 = srem i32 %8, 3
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%10 = icmp eq i32 %9, 0
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br i1 %10, label %print_fizz, label %divisible_5
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;--- Print 'Fizz'
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print_fizz:
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%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @"\01??_C@_05KEBFOHOF@Fizz?6?$AA@", i32 0, i32 0))
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br label %next
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;--- if (i % 5 == 0)
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divisible_5:
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%12 = load i32, i32* %1, align 4
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%13 = srem i32 %12, 5
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%14 = icmp eq i32 %13, 0
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br i1 %14, label %print_buzz, label %print_number
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;--- Print 'Buzz'
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print_buzz:
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%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @"\01??_C@_05JKJENPHA@Buzz?6?$AA@", i32 0, i32 0))
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br label %next
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;--- Print the number
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print_number:
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%16 = load i32, i32* %1, align 4
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%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @"\01??_C@_03PMGGPEJJ@?$CFd?6?$AA@", i32 0, i32 0), i32 %16)
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;--- It does not seem like this branch can be removed
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br label %next
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;--- i = i + 1
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next:
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%18 = load i32, i32* %1, align 4
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%19 = add nsw i32 %18, 1
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store i32 %19, i32* %1, align 4
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br label %loop
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;--- exit main
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finished:
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ret i32 0
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}
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attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"wchar_size", i32 2}
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!1 = !{i32 7, !"PIC Level", i32 2}
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!2 = !{!"clang version 6.0.1 (tags/RELEASE_601/final)"}
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