Hi,
I'm a newbie in LLVM environment.
I'm trying to generate the LLVM IR of a c file using clang. The command line argument I'm passing is as :
"clang -O0 -S -emit-llvm test.c -c -o test.ll"
It is generating the LLVM IR properly but I'm not getting the variable names. e.g,
for the c file :
#include <stdio.h>
int main()
{
int x;
int y;
x = 2;
y =4;
int z = x*y;
if(x==y)
{
z = x*y;
return z;
} else
{
z = x+y;
}
printf("z = %d", z);
return 0;
}
the corresponding llvm IR is :
; Function Attrs: nounwind uwtable
define i32 @main() #0 {
%1 = alloca i32, align 4
%2 = alloca i32, align 4
%3 = alloca i32, align 4
%4 = alloca i32, align 4
store i32 0, i32* %1, align 4
store i32 2, i32* %2, align 4
store i32 4, i32* %3, align 4
%5 = load i32, i32* %2, align 4
%6 = load i32, i32* %3, align 4
%7 = mul nsw i32 %5, %6
store i32 %7, i32* %4, align 4
%8 = load i32, i32* %2, align 4
%9 = load i32, i32* %3, align 4
%10 = icmp eq i32 %8, %9
br i1 %10, label %11, label %16
; <label>:11: ; preds = %0
%12 = load i32, i32* %2, align 4
%13 = load i32, i32* %3, align 4
%14 = mul nsw i32 %12, %13
store i32 %14, i32* %4, align 4
%15 = load i32, i32* %4, align 4
store i32 %15, i32* %1, align 4
br label %21
; <label>:16: ; preds = %0
%17 = load i32, i32* %2, align 4
%18 = load i32, i32* %3, align 4
%19 = add nsw i32 %17, %18
store i32 %19, i32* %4, align 4
br label %20
; <label>:20: ; preds = %16
store i32 0, i32* %1, align 4
br label %21
; <label>:21: ; preds = %20, %11
%22 = load i32, i32* %1, align 4
ret i32 %22
}
I wanted to get the variables in their original name i.e, x,y,z instead of %1,%2,%3, etc.
Is it possible to do so?
Thanks.