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instructions_to_run_profiled_if-conversion [2016/09/05 19:10] (current)
xiefan1 created
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 +Same description can be found in **legup_5.0/​tiger/​tool_source/​partition_analysis/​ifconv_profile_tools/​README.txt**
 +**To run simple profiled if-conversion in a benchmark directory:​**
 +    - Put "​set_combine_basicblock 3" in config.tcl to enable if-conversion.
 +    - make profile_ifconv (single_iteration=0/​1)
 +Note: single_iteration is 0 by default, which means running if-conversion iteratively.
 +The flow of this simple profiled if-conversion:​
 +source code ->  run legup completely (i.e. Frontend, compiler passes including
 +if-conversion pass, Backend) -> profiler -> run if-conversion iteratively based
 +on the profiling result -> run post-ifconversion compiler passes -> legup
 +Backend -> verilog
 +**To run O3 opt profiled if-conversion in a benchmark directory:​**
 +  - Backup examples/​Makefile.common
 +  - Go to /​ifconv_profile_tools,​ copy ./​Makefile.common to /examples
 +  - Put "​set_combine_basicblock 3" in local config.tcl to enable if-conversion.
 +  - make IFCONV_O3=1
 +To experiment the effect of running if-conversion in different orders (relative
 +to legup passes), simply move a block of code enclosed by an if statement in
 +./​Makfile.common (Search for "​Fan"​ in Makefile.common).
 +The flow of this O3 optimized profiled if-conversion:​
 +source code ->  legup frontend, some compiler passes* -> O3 opt + if-conversion
 +(in the sametime if-conversion pass sets and marks load/store to volatile, if
 +it's not volatile in input IR) -> profiled iterative if-conversion -> O3 opt ->
 +continue on the next legup compiler passes* -> if-conversion (sets the marked
 +volatile load/store back to nonvolatile -> profiled iterative if-conversion ->
 +post-ifconversion compiler passes -> legup Backend -> Verilog
 +Final notes:
 +  - The profile_ifconv target is shared between these 2 profiled if-conversion.
 +  - Revelent scripts are in legup_5.0/​tiger/​tool_source/​partition_analysis.
instructions_to_run_profiled_if-conversion.txt ยท Last modified: 2016/09/05 19:10 by xiefan1