https://bugs.llvm.org/show_bug.cgi?id=42901
Bug ID: 42901
Summary: Optimization introduces branch where none existed in
the LLVM IR
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Interprocedural Optimizations
Assignee: unassignedb...@nondot.org
Reporter: npmccal...@redhat.com
CC: llvm-bugs@lists.llvm.org
First, I'm not sure if I've picked the correct component. Please move it
elsewhere if needed.
And example of the problem is here:
https://godbolt.org/z/mTzWxX
Notice that the optimized code introduces a conditional operation which isn't
great given the fact that the input was crafted to avoid conditional
operations.
I ran this through llc over a loop of architectures and this problem occurs on
all architectures.
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