#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 */
typedef int /*<<< orphan*/ fd_set;
typedef int /*<<< orphan*/ buf;

/* Variables and functions */
int /*<<< orphan*/ FD_CLR(int, int /*<<< orphan*/ *);
scalar_t__ FD_ISSET(int, int /*<<< orphan*/ *);
int /*<<< orphan*/ FD_SET(int, int /*<<< orphan*/ *);
int /*<<< orphan*/ FD_ZERO(int /*<<< orphan*/ *);
int O_NONBLOCK;
int O_RDONLY;
int /*<<< orphan*/ close(int);
int open(char *, int);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ printf(char *, char *);
int read(int, char *, int);
scalar_t__ select(int, int /*<<< orphan*/ *, int /*<<< orphan*/ *,
                  int /*<<< orphan*/ *, int /*<<< orphan*/ *);
int main(void) {
  int fds[2];
  char buf[4096];
  int i, rc, maxfd;
  fd_set watchset;
  fd_set inset;
  if ((fds[0] = open("p1", O_RDONLY | O_NONBLOCK)) < 0) {
    perror("open p1");
    return 1;
  }
  if ((fds[1] = open("p2", O_RDONLY | O_NONBLOCK)) < 0) {
    perror("open p2");
    return 1;
  }
  FD_ZERO(&watchset);
  FD_SET(fds[0], &watchset);
  FD_SET(fds[1], &watchset);
  maxfd = fds[0] > fds[1] ? fds[0] : fds[1];
  while (FD_ISSET(fds[0], &watchset) || FD_ISSET(fds[1], &watchset)) {
    inset = watchset;
    if (select(maxfd + 1, &inset, NULL, NULL, NULL) < 0) {
      perror("select");
      return 1;
    }
    for (i = 0; i < 2; i++) {
      if (FD_ISSET(fds[i], &inset)) {
        rc = read(fds[i], buf, sizeof(buf) - 1);
        if (rc < 0) {
          perror("read");
          return 1;
        } else if (!rc) {
          close(fds[i]);
          FD_CLR(fds[i], &watchset);
        } else {
          buf[rc] = '\0';
          printf("read: %s", buf);
        }
      }
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x1030,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2e27(%rip),%rax
mov    (%rax),%esi
mov    0x2e26(%rip),%rax
or     (%rax),%esi
lea    0xe3a(%rip),%rdi
call   1090 <open@plt>
mov    %eax,-0xc(%rbp)
cmp    $0x0,%eax
jge    11f4 <main+0x54>
lea    0xe1d(%rip),%rdi
call   10a0 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    1439 <main+0x299>
mov    0x2de5(%rip),%rax
mov    (%rax),%esi
mov    0x2de4(%rip),%rax
or     (%rax),%esi
lea    0xe00(%rip),%rdi
call   1090 <open@plt>
mov    %eax,-0x8(%rbp)
cmp    $0x0,%eax
jge    1236 <main+0x96>
lea    0xde3(%rip),%rdi
call   10a0 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    1439 <main+0x299>
lea    -0x1020(%rbp),%rdi
call   1070 <FD_ZERO@plt>
mov    -0xc(%rbp),%edi
lea    -0x1020(%rbp),%rsi
call   10c0 <FD_SET@plt>
mov    -0x8(%rbp),%edi
lea    -0x1020(%rbp),%rsi
call   10c0 <FD_SET@plt>
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jle    127a <main+0xda>
mov    -0xc(%rbp),%eax
mov    %eax,-0x1028(%rbp)
jmp    1283 <main+0xe3>
mov    -0x8(%rbp),%eax
mov    %eax,-0x1028(%rbp)
mov    -0x1028(%rbp),%eax
mov    %eax,-0x101c(%rbp)
mov    -0xc(%rbp),%edi
lea    -0x1020(%rbp),%rsi
call   1030 <FD_ISSET@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0x1029(%rbp)
jne    12cf <main+0x12f>
mov    -0x8(%rbp),%edi
lea    -0x1020(%rbp),%rsi
call   1030 <FD_ISSET@plt>
cmp    $0x0,%rax
setne  %al
mov    %al,-0x1029(%rbp)
mov    -0x1029(%rbp),%al
test   $0x1,%al
jne    12e2 <main+0x142>
jmp    1432 <main+0x292>
mov    -0x1020(%rbp),%eax
mov    %eax,-0x1024(%rbp)
mov    -0x101c(%rbp),%edi
add    $0x1,%edi
lea    -0x1024(%rbp),%rsi
xor    %eax,%eax
mov    %eax,%r8d
mov    %r8,%rdx
mov    %r8,%rcx
call   1080 <select@plt>
cmp    $0x0,%rax
jge    1330 <main+0x190>
lea    0xcf1(%rip),%rdi
call   10a0 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    1439 <main+0x299>
movl   $0x0,-0x1014(%rbp)
cmpl   $0x2,-0x1014(%rbp)
jge    142d <main+0x28d>
movslq -0x1014(%rbp),%rax
mov    -0xc(%rbp,%rax,4),%edi
lea    -0x1024(%rbp),%rsi
call   1030 <FD_ISSET@plt>
cmp    $0x0,%rax
je     1414 <main+0x274>
movslq -0x1014(%rbp),%rax
mov    -0xc(%rbp,%rax,4),%edi
lea    -0x1010(%rbp),%rsi
mov    $0xfff,%edx
call   1060 <read@plt>
mov    %eax,-0x1018(%rbp)
cmpl   $0x0,-0x1018(%rbp)
jge    13af <main+0x20f>
lea    0xc79(%rip),%rdi
call   10a0 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    1439 <main+0x299>
cmpl   $0x0,-0x1018(%rbp)
jne    13e8 <main+0x248>
movslq -0x1014(%rbp),%rax
mov    -0xc(%rbp,%rax,4),%edi
call   1050 <close@plt>
movslq -0x1014(%rbp),%rax
mov    -0xc(%rbp,%rax,4),%edi
lea    -0x1020(%rbp),%rsi
call   10b0 <FD_CLR@plt>
jmp    140a <main+0x26a>
movslq -0x1018(%rbp),%rax
movb   $0x0,-0x1010(%rbp,%rax,1)
lea    -0x1010(%rbp),%rsi
lea    0xc17(%rip),%rdi
call   1040 <printf@plt>
jmp    140f <main+0x26f>
jmp    1414 <main+0x274>
jmp    1419 <main+0x279>
mov    -0x1014(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1014(%rbp)
jmp    133a <main+0x19a>
jmp    128f <main+0xef>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x1030,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x1018,%rsp
mov    0x2e28(%rip),%r14
mov    0x2e29(%rip),%rbp
mov    0x0(%rbp),%esi
or     (%r14),%esi
lea    0xe39(%rip),%rdi
call   1090 <open@plt>
test   %eax,%eax
js     134e <main+0x1ae>
mov    %eax,%ebx
mov    0x0(%rbp),%esi
or     (%r14),%esi
lea    0xe25(%rip),%rdi
call   1090 <open@plt>
test   %eax,%eax
js     1357 <main+0x1b7>
mov    %eax,%ebp
lea    0xc(%rsp),%r14
mov    %r14,%rdi
call   1070 <FD_ZERO@plt>
mov    %ebx,%edi
mov    %r14,%rsi
call   10c0 <FD_SET@plt>
mov    %ebp,%edi
mov    %r14,%rsi
call   10c0 <FD_SET@plt>
cmp    %ebp,%ebx
mov    %ebp,%r15d
cmova  %ebx,%r15d
add    $0x1,%r15d
lea    0x8(%rsp),%r12
lea    0x10(%rsp),%r13
jmp    1251 <main+0xb1>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %ebp,%edi
call   1050 <close@plt>
mov    %ebp,%edi
mov    %r14,%rsi
call   10b0 <FD_CLR@plt>
mov    %ebx,%edi
mov    %r14,%rsi
call   1030 <FD_ISSET@plt>
test   %rax,%rax
jne    1273 <main+0xd3>
mov    %ebp,%edi
mov    %r14,%rsi
call   1030 <FD_ISSET@plt>
test   %rax,%rax
je     1338 <main+0x198>
mov    0xc(%rsp),%eax
mov    %eax,0x8(%rsp)
mov    %r15d,%edi
mov    %r12,%rsi
xor    %edx,%edx
xor    %ecx,%ecx
xor    %r8d,%r8d
call   1080 <select@plt>
test   %rax,%rax
js     1345 <main+0x1a5>
mov    %ebx,%edi
mov    %r12,%rsi
call   1030 <FD_ISSET@plt>
test   %rax,%rax
je     12f1 <main+0x151>
mov    %ebx,%edi
mov    %r13,%rsi
mov    $0xfff,%edx
call   1060 <read@plt>
test   %eax,%eax
js     133c <main+0x19c>
je     12e0 <main+0x140>
mov    %eax,%eax
movb   $0x0,0x10(%rsp,%rax,1)
lea    0xd50(%rip),%rdi
mov    %r13,%rsi
call   1040 <printf@plt>
jmp    12f1 <main+0x151>
cs nopw 0x0(%rax,%rax,1)
mov    %ebx,%edi
call   1050 <close@plt>
mov    %ebx,%edi
mov    %r14,%rsi
call   10b0 <FD_CLR@plt>
mov    %ebp,%edi
mov    %r12,%rsi
call   1030 <FD_ISSET@plt>
test   %rax,%rax
je     1251 <main+0xb1>
mov    %ebp,%edi
mov    %r13,%rsi
mov    $0xfff,%edx
call   1060 <read@plt>
test   %eax,%eax
js     133c <main+0x19c>
je     1240 <main+0xa0>
mov    %eax,%eax
movb   $0x0,0x10(%rsp,%rax,1)
lea    0xcf1(%rip),%rdi
mov    %r13,%rsi
call   1040 <printf@plt>
jmp    1251 <main+0xb1>
xor    %eax,%eax
jmp    1368 <main+0x1c8>
lea    0xcd4(%rip),%rdi
jmp    135e <main+0x1be>
lea    0xcc4(%rip),%rdi
jmp    135e <main+0x1be>
lea    0xcab(%rip),%rdi
jmp    135e <main+0x1be>
lea    0xcaa(%rip),%rdi
call   10a0 <perror@plt>
mov    $0x1,%eax
add    $0x1018,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"p1\00"
@O_RDONLY = global i32 0
@O_NONBLOCK = global i32 0
@.str.1 = [8 x i8] c"open p1\00"
@.str.2 = [3 x i8] c"p2\00"
@.str.3 = [8 x i8] c"open p2\00"
@.str.4 = [7 x i8] c"select\00"
@.str.5 = [5 x i8] c"read\00"
@.str.6 = [9 x i8] c"read: %s\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [2 x i32]
%3 = alloca [4096 x i8]
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
store i32 0, i32* %1
%9 = load i32, i32* @O_RDONLY
%10 = load i32, i32* @O_NONBLOCK
%11 = or i32 %9, %10
%12 = call i32 @open(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %11)
%13 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 0
store i32 %12, i32* %13
%14 = icmp slt i32 %12, 0
br i1 %14, label %15, label %17
15: ; preds = %0
%16 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0))
store i32 1, i32* %1
br label %117
17: ; preds = %0
%18 = load i32, i32* @O_RDONLY
%19 = load i32, i32* @O_NONBLOCK
%20 = or i32 %18, %19
%21 = call i32 @open(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %20)
%22 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 1
store i32 %21, i32* %22
%23 = icmp slt i32 %21, 0
br i1 %23, label %24, label %26
24: ; preds = %17
%25 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0))
store i32 1, i32* %1
br label %117
26: ; preds = %17
%27 = call i32 @FD_ZERO(i32* %7)
%28 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 0
%29 = load i32, i32* %28
%30 = call i32 @FD_SET(i32 %29, i32* %7)
%31 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 1
%32 = load i32, i32* %31
%33 = call i32 @FD_SET(i32 %32, i32* %7)
%34 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 0
%35 = load i32, i32* %34
%36 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 1
%37 = load i32, i32* %36
%38 = icmp sgt i32 %35, %37
br i1 %38, label %39, label %42
39: ; preds = %26
%40 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 0
%41 = load i32, i32* %40
br label %45
42: ; preds = %26
%43 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 1
%44 = load i32, i32* %43
br label %45
45: ; preds = %42, %39
%46 = phi i32 [ %41, %39 ], [ %44, %42 ]
store i32 %46, i32* %6
br label %47
47: ; preds = %115, %45
%48 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 0
%49 = load i32, i32* %48
%50 = call i64 @FD_ISSET(i32 %49, i32* %7)
%51 = icmp ne i64 %50, 0
br i1 %51, label %57, label %52
52: ; preds = %47
%53 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 1
%54 = load i32, i32* %53
%55 = call i64 @FD_ISSET(i32 %54, i32* %7)
%56 = icmp ne i64 %55, 0
br label %57
57: ; preds = %52, %47
%58 = phi i1 [ true, %47 ], [ %56, %52 ]
br i1 %58, label %59, label %116
59: ; preds = %57
%60 = load i32, i32* %7
store i32 %60, i32* %8
%61 = load i32, i32* %6
%62 = add nsw i32 %61, 1
%63 = call i64 @select(i32 %62, i32* %8, i32* null, i32* null, i32* null)
%64 = icmp slt i64 %63, 0
br i1 %64, label %65, label %67
65: ; preds = %59
%66 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0))
store i32 1, i32* %1
br label %117
67: ; preds = %59
store i32 0, i32* %4
br label %68
68: ; preds = %112, %67
%69 = load i32, i32* %4
%70 = icmp slt i32 %69, 2
br i1 %70, label %71, label %115
71: ; preds = %68
%72 = load i32, i32* %4
%73 = sext i32 %72 to i64
%74 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 %73
%75 = load i32, i32* %74
%76 = call i64 @FD_ISSET(i32 %75, i32* %8)
%77 = icmp ne i64 %76, 0
br i1 %77, label %78, label %111
78: ; preds = %71
%79 = load i32, i32* %4
%80 = sext i32 %79 to i64
%81 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 %80
%82 = load i32, i32* %81
%83 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 0
%84 = call i32 @read(i32 %82, i8* %83, i32 4095)
store i32 %84, i32* %5
%85 = load i32, i32* %5
%86 = icmp slt i32 %85, 0
br i1 %86, label %87, label %89
87: ; preds = %78
%88 = call i32 @perror(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i64 0, i64 0))
store i32 1, i32* %1
br label %117
89: ; preds = %78
%90 = load i32, i32* %5
%91 = icmp ne i32 %90, 0
br i1 %91, label %103, label %92
92: ; preds = %89
%93 = load i32, i32* %4
%94 = sext i32 %93 to i64
%95 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 %94
%96 = load i32, i32* %95
%97 = call i32 @close(i32 %96)
%98 = load i32, i32* %4
%99 = sext i32 %98 to i64
%100 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 %99
%101 = load i32, i32* %100
%102 = call i32 @FD_CLR(i32 %101, i32* %7)
br label %109
103: ; preds = %89
%104 = load i32, i32* %5
%105 = sext i32 %104 to i64
%106 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 %105
store i8 0, i8* %106
%107 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 0
%108 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i8* %107)
br label %109
109: ; preds = %103, %92
br label %110
110: ; preds = %109
br label %111
111: ; preds = %110, %71
br label %112
112: ; preds = %111
%113 = load i32, i32* %4
%114 = add nsw i32 %113, 1
store i32 %114, i32* %4
br label %68
115: ; preds = %68
br label %47
116: ; preds = %57
store i32 0, i32* %1
br label %117
117: ; preds = %116, %87, %65, %24, %15
%118 = load i32, i32* %1
ret i32 %118
}

LLVM IR (-O2):
@.str = [3 x i8] c"p1\00"
@O_RDONLY = global i32 0
@O_NONBLOCK = global i32 0
@.str.1 = [8 x i8] c"open p1\00"
@.str.2 = [3 x i8] c"p2\00"
@.str.3 = [8 x i8] c"open p2\00"
@.str.4 = [7 x i8] c"select\00"
@.str.5 = [5 x i8] c"read\00"
@.str.6 = [9 x i8] c"read: %s\00"
define i32 @main() {
%1 = alloca [4096 x i8]
%2 = alloca i32
%3 = alloca i32
%4 = getelementptr inbounds [4096 x i8], [4096 x i8]* %1, i64 0, i64 0
%5 = bitcast i32* %2 to i8*
%6 = bitcast i32* %3 to i8*
%7 = load i32, i32* @O_RDONLY
%8 = load i32, i32* @O_NONBLOCK
%9 = or i32 %8, %7
%10 = tail call i32 @open(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %9)
%11 = icmp slt i32 %10, 0
br i1 %11, label %12, label %14
12: ; preds = %0
%13 = tail call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0))
br label %74
14: ; preds = %0
%15 = load i32, i32* @O_RDONLY
%16 = load i32, i32* @O_NONBLOCK
%17 = or i32 %16, %15
%18 = tail call i32 @open(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %17)
%19 = icmp slt i32 %18, 0
br i1 %19, label %20, label %22
20: ; preds = %14
%21 = tail call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0))
br label %74
22: ; preds = %14
%23 = call i32 @FD_ZERO(i32* %2)
%24 = call i32 @FD_SET(i32 %10, i32* %2)
%25 = call i32 @FD_SET(i32 %18, i32* %2)
%26 = icmp ugt i32 %10, %18
%27 = select i1 %26, i32 %10, i32 %18
%28 = add nuw nsw i32 %27, 1
br label %29
29: ; preds = %73, %22
%30 = call i64 @FD_ISSET(i32 %10, i32* %2)
%31 = icmp eq i64 %30, 0
br i1 %31, label %32, label %35
32: ; preds = %29
%33 = call i64 @FD_ISSET(i32 %18, i32* %2)
%34 = icmp eq i64 %33, 0
br i1 %34, label %74, label %35
35: ; preds = %29, %32
%36 = load i32, i32* %2
store i32 %36, i32* %3
%37 = call i64 @select(i32 %28, i32* %3, i32* null, i32* null, i32* null)
%38 = icmp slt i64 %37, 0
br i1 %38, label %42, label %39
39: ; preds = %35
%40 = call i64 @FD_ISSET(i32 %10, i32* %3)
%41 = icmp eq i64 %40, 0
br i1 %41, label %58, label %44
42: ; preds = %35
%43 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0))
br label %74
44: ; preds = %39
%45 = call i32 @read(i32 %10, i8* %4, i32 4095)
%46 = icmp slt i32 %45, 0
br i1 %46, label %47, label %49
47: ; preds = %61, %44
%48 = call i32 @perror(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i64 0, i64 0))
br label %74
49: ; preds = %44
%50 = icmp eq i32 %45, 0
br i1 %50, label %51, label %54
51: ; preds = %49
%52 = call i32 @close(i32 %10)
%53 = call i32 @FD_CLR(i32 %10, i32* %2)
br label %58
54: ; preds = %49
%55 = zext i32 %45 to i64
%56 = getelementptr inbounds [4096 x i8], [4096 x i8]* %1, i64 0, i64 %55
store i8 0, i8* %56
%57 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i8* %4)
br label %58
58: ; preds = %39, %51, %54
%59 = call i64 @FD_ISSET(i32 %18, i32* %3)
%60 = icmp eq i64 %59, 0
br i1 %60, label %73, label %61
61: ; preds = %58
%62 = call i32 @read(i32 %18, i8* %4, i32 4095)
%63 = icmp slt i32 %62, 0
br i1 %63, label %47, label %64
64: ; preds = %61
%65 = icmp eq i32 %62, 0
br i1 %65, label %70, label %66
66: ; preds = %64
%67 = zext i32 %62 to i64
%68 = getelementptr inbounds [4096 x i8], [4096 x i8]* %1, i64 0, i64 %67
store i8 0, i8* %68
%69 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i8* %4)
br label %73
70: ; preds = %64
%71 = call i32 @close(i32 %18)
%72 = call i32 @FD_CLR(i32 %18, i32* %2)
br label %73
73: ; preds = %70, %66, %58
br label %29
74: ; preds = %32, %47, %42, %20, %12
%75 = phi i32 [ 1, %12 ], [ 1, %20 ], [ 1, %42 ], [ 1, %47 ], [ 0, %32 ]
ret i32 %75
}