#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
void test(char *str) {
  char ret;
  while (*str != '\0') {
    ret = *str;
    printf("Str: %s \n", str);
    printf("Ret: %c \n", ret);
    str++;
  }
}


x86 assembly (clang, -O0):
<test>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x0,%eax
je     116a <test+0x5a>
mov    -0x8(%rbp),%rax
mov    (%rax),%al
mov    %al,-0x9(%rbp)
mov    -0x8(%rbp),%rsi
lea    0xec0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movsbl -0x9(%rbp),%esi
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x8(%rbp)
jmp    111c <test+0xc>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<test>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    (%rdi),%al
test   %al,%al
je     1158 <test+0x48>
mov    %rdi,%rbx
lea    0xed9(%rip),%r14
lea    0xedc(%rip),%r15
xchg   %ax,%ax
movsbl %al,%ebp
mov    %r14,%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1030 <printf@plt>
movzbl 0x1(%rbx),%eax
add    $0x1,%rbx
test   %al,%al
jne    1130 <test+0x20>
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [10 x i8] c"Str: %s \0A\00"
@.str.1 = [10 x i8] c"Ret: %c \0A\00"
define void @test(i8* %0) {
%2 = alloca i8*
%3 = alloca i8
store i8* %0, i8** %2
br label %4
4: ; preds = %9, %1
%5 = load i8*, i8** %2
%6 = load i8, i8* %5
%7 = sext i8 %6 to i32
%8 = icmp ne i32 %7, 0
br i1 %8, label %9, label %19
9: ; preds = %4
%10 = load i8*, i8** %2
%11 = load i8, i8* %10
store i8 %11, i8* %3
%12 = load i8*, i8** %2
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8* %12)
%14 = load i8, i8* %3
%15 = sext i8 %14 to i32
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32 %15)
%17 = load i8*, i8** %2
%18 = getelementptr inbounds i8, i8* %17, i32 1
store i8* %18, i8** %2
br label %4
19: ; preds = %4
ret void
}

LLVM IR (-O2):
@.str = [10 x i8] c"Str: %s \0A\00"
@.str.1 = [10 x i8] c"Ret: %c \0A\00"
define void @test(i8* %0) {
%2 = load i8, i8* %0
%3 = icmp eq i8 %2, 0
br i1 %3, label %13, label %4
4: ; preds = %1, %4
%5 = phi i8 [ %11, %4 ], [ %2, %1 ]
%6 = phi i8* [ %10, %4 ], [ %0, %1 ]
%7 = sext i8 %5 to i32
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8* %6)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32 %7)
%10 = getelementptr inbounds i8, i8* %6, i64 1
%11 = load i8, i8* %10
%12 = icmp eq i8 %11, 0
br i1 %12, label %13, label %4
13: ; preds = %4, %1
ret void
}