Hi all,

I’m trying to obtain a .ll with parameters name for every function. My simple c C is the following:

int sum(int a, int b) {

return a+b;

}

int main() {

sum(1,2);

}

I obtain the .ll with the following commands:

clang -emit-llvm sum.c -c

llvm-dis-7 sum.bc

The obtained .ll is:

cat sum.ll

; ModuleID = ‘sum.bc’

source_filename = “sum.c”

target datalayout = “e-m:e-i64:64-f80:128-n8:16:32:64-S128”

target triple = “x86_64-pc-linux-gnu”

; Function Attrs: noinline nounwind optnone uwtable

define i32 @sum(i32, i32) #0 {

%3 = alloca i32, align 4

%4 = alloca i32, align 4

store i32 %0, i32* %3, align 4

store i32 %1, i32* %4, align 4

%5 = load i32, i32* %3, align 4

%6 = load i32, i32* %4, align 4

%7 = add nsw i32 %5, %6

ret i32 %7

}

; Function Attrs: noinline nounwind optnone uwtable

define i32 @main() #0 {

%1 = call i32 @sum(i32 1, i32 2)

ret i32 0

}

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”=“true” “no-frame-pointer-elim-non-leaf” “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” }

!llvm.module.flags = !{!0}

!llvm.ident = !{!1}

!0 = !{i32 1, !“wchar_size”, i32 4}

!1 = !{!“clang version 6.0.1-svn334776-1~exp1~20190309042703.125 (branches/release_60)”}

Could you tell me why I don’t see a and b parameters for the sum function?

Thanks

Alberto