Thnaks to your explanation I found a way to do it:
1) Duplicate the blocks
2) Fix cfg, phis, and dominators
3) manually call update_ssa
4) Edit rhs uses
By doing 4) after 3) subsequent calls to update_ssa, do not alter the operands
anymore.
On 17 Mar 2015, at 20:10, Jeff Law wrote:
> On 03/17
On 03/17/2015 12:54 PM, Benedikt Huber wrote:
Thank you for the answer.
I made sure that each variable is only assigned exactly once.
duplicate_block already generates new names for all lhs.
After that I edited all rhs to the uses I wanted for the unrolling,
so SSA-form should still be intact.
Wh
Thank you for the answer.
I made sure that each variable is only assigned exactly once.
duplicate_block already generates new names for all lhs.
After that I edited all rhs to the uses I wanted for the unrolling,
so SSA-form should still be intact.
What I do not understand is: Why does gcc change t
On 03/17/2015 06:32 AM, Benedikt Huber wrote:
Hi,
I have a problem with a transformation pass I wrote.
The pass is meant to pipeline and unroll lookups in linked lists.
After my pass is run, gcc renames a variable, which leads to wrong results.
Part of my pass's dump, which is as I want it.
..
