http://bugs.llvm.org/show_bug.cgi?id=32767
Bug ID: 32767
Summary: JIT time is incredibly slow for the following bytecode
on Windows 10 with AMD Ryzen R7 1700X
Product: new-bugs
Version: 4.0
Hardware: PC
OS: other
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Created attachment 18338
--> http://bugs.llvm.org/attachment.cgi?id=18338&action=edit
Problematic LLVM IR
Hi,
I'm a Bitwig Studio developer (www.bitwig.com), and we use LLVM to JIT some
digital signal processing algorithms. Our software is used by thousand of
customers on Windows, Mac and Linux.
We just updated from LLVM 3.9.1 to LLVM 4.0 and found that it takes a lot of
time to JIT the attached LLVM IR (48701ms) on AMD Ryzen R7 1700X, while it is
not noticeable on other architectures.
The command "opt -mcpu=znver1 /home/abique/downloads/claes-cache-entry.ll -o
tutu.bc -O3" is instant, so it is slow in the target lowering or in the JIT
phase.
By the way, do you have a workaround for this issue until the fix is released?
Many thanks.
Regards,
Alexandre
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