https://bugs.llvm.org/show_bug.cgi?id=46873
Bug ID: 46873
Summary: LiveIntervals verifier errors not caught when using
-run-pass
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: matthew.arsena...@amd.com
CC: llvm-bugs@lists.llvm.org
When using -run-pass with a single pass, LiveIntervals is not available in the
final verifier run, and thus does not catch broken live intervals introduced by
the pass. This seems to only work correctly only if another non-verifier pass
is forced to run after the pass you are trying to observe.
A workaround is to either force a run of another pass that needs LiveIntervals
after the interesting pass, or to use -start-before/-start-after around the
pass
e.g.
llc -run-pass=breaks-liveints -verify-machineinstrs foo.mir // No verifier
error
llc -run-pass=breaks-liveints,somethingelse -verify-machineinstrs // Verifier
error
llc -start-before=breaks-liveints -stop-after=somethingelse
-verify-machineinstrs // Verifier error
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