[llvm-dev] (no subject)

[Alberto Barbaro via llvm-dev]

Hi all,
I have the following C code:

#include<stdio.h>

int main(int argc, char *argv[]) {

    printf("%s\n", argv[0]);
    return argc;
}

that generates the following IR for the main function:

; Function Attrs: noinline nounwind optnone uwtable
define i32 @main(i32, i8**) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i8**, align 8
  store i32 0, i32* %3, align 4
  store i32 %0, i32* %4, align 4
  store i8** %1, i8*** %5, align 8
  %6 = load i8**, i8*** %5, align 8
  %7 = getelementptr inbounds i8*, i8** %6, i64 0
  %8 = load i8*, i8** %7, align 8
  %9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4
x i8]* @.str, i32 0, i32 0), i8* %8)
  %10 = load i32, i32* %4, align 4
  ret i32 %10
}

I think %8 will contain the address of argv[0], so %7 was storing a pointer
to pointer to argv? I'm not sure of that.

Considering that I can access the GenericValue set by
visitGetElementPtrInst. How can I obtain the value of argv[0] at runtime
using the Interpreter class?

Thanks
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