https://bugs.llvm.org/show_bug.cgi?id=42286
Bug ID: 42286
Summary: [llvm-mca] Even better handling for "unsupported"
instructions
Product: tools
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: llvm-mca
Assignee: unassignedb...@nondot.org
Reporter: lebedev...@gmail.com
CC: andrea.dibia...@gmail.com, llvm-bugs@lists.llvm.org,
matthew.da...@sony.com
Currently, llvm-mca complains only if the instruction is marked
as unsupported in the sched model. That isn't ideal, in order to
get it right, one needs to somehow keep track of every instruction,
and mark unsupported as such, via InstRW.
But that info is already there, the llvm knows what instruction
sets are supported by what cpu.
It would be great to simply make use of that info.
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