[LLVMdev] how to get MachineBasicBlock of a BasicBlock

[Jeff Kunkel]

So a simple revision

typedef struct findBlock {
 const BasicBlock * block;
 std::vector<MachineBasicBlock*> * blocks
 findBlock( BasicBlock * block, std::vector<MachineBasicBlock*> * blocks )
  : block(block), blocks(blocks) {}
 void operator( MachineBasicBlock * mbb ) {
    if( mbb->getBasicBlock() == block)
      blocks.push_back(mbb);
 }
} findBlock;

std::vector<MachineBasicBlock*> blocks
std::for_each( machineFunction.begin(), machineFunction.end(),
 findBlock( basicBlock, blocks ) );

Jeff Kunkel

On Fri, Oct 15, 2010 at 8:51 AM, David Meyer <pdox at google.com> wrote:
> Also note: there may be multiple MachineBasicBlock's for a single
> BasicBlock.
> - David M
>
> On Fri, Oct 15, 2010 at 4:59 AM, Jeff Kunkel <jdkunk3 at gmail.com> wrote:
>>
>> I don't think you can.
>>
>> The BasicBlock is a member of MachineBasicBlock. It is not inherited,
>> so it cannot be cast. The number of the MachineBasicBlock is not the
>> same as any BasicBlock values. So
>> MachineFunction::getMachineBasicBlock( BasicBlock::{get the number} )
>> cannot work. I do not see much in the basic block which can identify
>> it.
>>
>> So you can search for it.
>>
>> typedef struct findBlock {
>>  BasicBlock * block;
>>  findBlock( BasicBlock * block ) : block(block) {}
>>  bool operator( MachineBasicBlock * mbb ) { return
>> mbb->getBasicBlock() == block; }
>> } findBlock;
>> MachineBasicBlock = *std::find( machineFunction.begin(),
>> machineFunction.end(),
>>  findBlock( basicBlock ) );
>>
>> -Thanks
>> -Jeff Kunkel
>>
>> 2010/10/15 徐敏 <xm1988 at mail.ustc.edu.cn>:
>> > Hello, we can get BasicBlock from MachineBasicBlock through
>> > MachineBasicBlock::getBasicBlock() function, but how can I get
>> > MachineBasicBlock of a BasicBlock?
>> > Thank you!
>> >
>> >
>> >
>> >
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