Shane Lin via llvm-dev
2021-Dec-23 08:23 UTC
[llvm-dev] How to get the instruction counts of each function of llvm IR?
I’m trying to get the instruction counts of each function in a single llvm IR. I try the command below: opt -enable-new-pm=0 -instcount -stats source_IR.ll and I get the result like: ---------------------------------------------------------------------------------------------------------------- ===-------------------------------------------------------------------------== ... Statistics Collected ... ===-------------------------------------------------------------------------== 3 instcount - Number of Add insts 2 instcount - Number of And insts 10 instcount - Number of Br insts 1 instcount - Number of Call insts 10 instcount - Number of FAdd insts 11 instcount - Number of FDiv insts 7 instcount - Number of FMul insts 5 instcount - Number of ICmp insts 2 instcount - Number of Or insts 10 instcount - Number of PHI insts 2 instcount - Number of Ret insts 6 instcount - Number of UIToFP insts 12 instcount - Number of basic blocks 2 instcount - Number of non-external functions 69 instcount - Number of instructions (of all types) ——————————————————————————————————————————————————————————————— But this is the instruction count of whole program. I want to get the instruction counts of each function in this IR. I try the command below: opt -enable-new-pm=0 -instcount -stats source_IR.ll -analyze and I get the result: Printing analysis 'Counts the various types of Instructions' for function 'main': Printing analysis 'Counts the various types of Instructions' for function 'compute_pi_baseline': ===-------------------------------------------------------------------------== ... Statistics Collected ... ===-------------------------------------------------------------------------== 3 instcount - Number of Add insts 2 instcount - Number of And insts 10 instcount - Number of Br insts 1 instcount - Number of Call insts 10 instcount - Number of FAdd insts 11 instcount - Number of FDiv insts 7 instcount - Number of FMul insts 5 instcount - Number of ICmp insts 2 instcount - Number of Or insts 10 instcount - Number of PHI insts 2 instcount - Number of Ret insts 6 instcount - Number of UIToFP insts 12 instcount - Number of basic blocks 2 instcount - Number of non-external functions 69 instcount - Number of instructions (of all types) there is nothing after the Printing line. How could I get the instruction counts of each function by using llvm command? I prefer not to write the pass by myself first -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20211223/b61aea2c/attachment-0001.html>
Wang, Phoebe via llvm-dev
2021-Dec-23 14:02 UTC
[llvm-dev] How to get the instruction counts of each function of llvm IR?
Not sure if there’s a better solution, anyway we can achieve it by script like:
$ cat t.sh
#!/bin/bash
for f in $(grep -r define $1 | cut -d @ -f 2 | cut -d '(' -f 1)
do
echo "Function: $f"
llvm-extract -S $1 --func=$f | opt -S -enable-new-pm=0 -instcount -stats >
/dev/null
done
$ source t.sh llvm/test/CodeGen/X86/add.ll
Thanks
Phoebe
From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of Shane Lin
via llvm-dev
Sent: Thursday, December 23, 2021 4:24 PM
To: llvm-dev at lists.llvm.org
Subject: [llvm-dev] How to get the instruction counts of each function of llvm
IR?
I’m trying to get the instruction counts of each function in a single llvm IR.
I try the command below:
opt -enable-new-pm=0 -instcount -stats source_IR.ll
and I get the result like:
----------------------------------------------------------------------------------------------------------------
===-------------------------------------------------------------------------==
... Statistics Collected ...
===-------------------------------------------------------------------------==
3 instcount - Number of Add insts
2 instcount - Number of And insts
10 instcount - Number of Br insts
1 instcount - Number of Call insts
10 instcount - Number of FAdd insts
11 instcount - Number of FDiv insts
7 instcount - Number of FMul insts
5 instcount - Number of ICmp insts
2 instcount - Number of Or insts
10 instcount - Number of PHI insts
2 instcount - Number of Ret insts
6 instcount - Number of UIToFP insts
12 instcount - Number of basic blocks
2 instcount - Number of non-external functions
69 instcount - Number of instructions (of all types)
———————————————————————————————————————————————————————————————
But this is the instruction count of whole program. I want to get the
instruction counts of each function in this IR.
I try the command below:
opt -enable-new-pm=0 -instcount -stats source_IR.ll -analyze
and I get the result:
Printing analysis 'Counts the various types of Instructions' for
function 'main':
Printing analysis 'Counts the various types of Instructions' for
function 'compute_pi_baseline':
===-------------------------------------------------------------------------==
... Statistics Collected ...
===-------------------------------------------------------------------------==
3 instcount - Number of Add insts
2 instcount - Number of And insts
10 instcount - Number of Br insts
1 instcount - Number of Call insts
10 instcount - Number of FAdd insts
11 instcount - Number of FDiv insts
7 instcount - Number of FMul insts
5 instcount - Number of ICmp insts
2 instcount - Number of Or insts
10 instcount - Number of PHI insts
2 instcount - Number of Ret insts
6 instcount - Number of UIToFP insts
12 instcount - Number of basic blocks
2 instcount - Number of non-external functions
69 instcount - Number of instructions (of all types)
there is nothing after the Printing line.
How could I get the instruction counts of each function by using llvm command?
I prefer not to write the pass by myself first
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