#define UINT unsigned int
#define UINT64 unsigned long long
....
UINT64 iValue;
UINT iOffset;

iOffset = rand()&63;
iValue = (UINT64)(1) << iOffset;

_BLF rand,??rand??rT
LSLS R2,R0,#+26
LSRS R2,R2,#+26
MOVS R0,#+1
MOVS R1,#+0
_BLF ??lllsl_t,??rT??lllsl_t

iOffset = rand()&63;
iValue = 1;
while(iOffset){
    iValue = iValue << 1;
    iOffset--;
}

    UINT vl = 0, vh = 0;

    iOffset = rand()&63;
    if(iOffset < 32) vl = 1UL << iOffset;
    else vh = 1UL << (iOffset - 32);
    iValue = ((UINT64)vh << 32) | vl;

UINT64 f1(void)
{
  UINT iOffset = rand()&63;
  if (iOffset>31) return (UINT64)(1UL<<(iOffset-32))<<32;
  return (UINT64)(1UL<<iOffset);
}

// 123 UINT64 f1(void)
// 124 {
f1:
PUSH {LR}
SUB SP,SP,#+4
// 125 UINT iOffset = rand()&63;
BL rand
AND R0,R0,#0x3F
// 126 if (iOffset>31) return (UINT64)(1UL<<(iOffset-32))<<32;
MOV R1,#+1
CMP R0,#+32
BCC ??f1_0
SUB R0,R0,#+32
LSL R0,R1,R0
MOV R1,R0
MOV R0,#+0
B ??f1_1
// 127 return (UINT64)(1UL<<iOffset);
??f1_0:
LSL R0,R1,R0
MOV R1,#+0
??f1_1:
ADD SP,SP,#+4 ;; stack cleaning
POP {LR}
BX LR ;; return
// 128 }

UINT64 f1(void)
{
  UINT vl, vh;
  UINT iOffset = rand()&63;
  vl = 1UL << iOffset;
  vh = 1UL << (iOffset - 32);
  return ((UINT64)vh << 32) | vl;
}

// 123 UINT64 f1(void)
// 124 {
f1:
PUSH {LR}
SUB SP,SP,#+4
// 125 UINT vl, vh;
// 126 UINT iOffset = rand()&63;
BL rand
AND R0,R0,#0x3F
// 127 vl = 1UL << iOffset;
// 128 vh = 1UL << (iOffset - 32);
// 129 return ((UINT64)vh << 32) | vl;
MOV R2,#+1
SUB R1,R0,#+32
LSL R1,R2,R1
LSL R0,R2,R0
ADD SP,SP,#+4 ;; stack cleaning
POP {LR}
BX LR ;; return
// 130 }