54 lines
2.3 KiB
Plaintext
54 lines
2.3 KiB
Plaintext
; 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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;--- The declarations for the external C functions
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declare i32 @printf(i8*, ...)
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$"EVEN_STR" = comdat any
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$"ODD_STR" = comdat any
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@"EVEN_STR" = linkonce_odr unnamed_addr constant [12 x i8] c"%d is even\0A\00", comdat, align 1
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@"ODD_STR" = linkonce_odr unnamed_addr constant [11 x i8] c"%d is odd\0A\00", comdat, align 1
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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 ;-- allocate i
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store i32 0, i32* %1, align 4 ;-- store 0 in i
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br label %loop
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loop:
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%2 = load i32, i32* %1, align 4 ;-- load i
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%3 = icmp ult i32 %2, 4 ;-- i < 4
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br i1 %3, label %loop_body, label %exit
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loop_body:
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%4 = load i32, i32* %1, align 4 ;-- load i
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%5 = and i32 %4, 1 ;-- i & 1
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%6 = icmp eq i32 %5, 0 ;-- (i & 1) == 0
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br i1 %6, label %even_branch, label %odd_branch
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even_branch:
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%7 = load i32, i32* %1, align 4 ;-- load i
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%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @"EVEN_STR", i32 0, i32 0), i32 %7)
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br label %loop_increment
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odd_branch:
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%9 = load i32, i32* %1, align 4 ;-- load i
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%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @"ODD_STR", i32 0, i32 0), i32 %9)
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br label %loop_increment
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loop_increment:
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%11 = load i32, i32* %1, align 4 ;-- load i
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%12 = add i32 %11, 1 ;-- increment i
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store i32 %12, i32* %1, align 4 ;-- store i
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br label %loop
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exit:
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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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