https://bugs.llvm.org/show_bug.cgi?id=49959
Bug ID: 49959
Summary: [Debugify] "Missing line" false alarm on PHI node
Product: libraries
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Transformation Utilities
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
debugify always report "missing line" false alarms on PHI node when PHI node is
untouched by the target pass.
Probably relates to https://reviews.llvm.org/D75242
applyDebugifyMetadata adds debug locations on PHI nodes, but
checkDebugifyMetadata unconditionally skips PHI nodes during
missing-line-check.
ll reproducer:
; debugify-ignore-phi.ll
define void @test_phi(i1 %cond) {
0:
br i1 %cond, label %1, label %2
1:
br label %2
2:
%v = phi i32 [ 0, %0 ], [ 1, %1 ]
ret void
}
opt -disable-output -debugify-each -passes=helloworld debugify-ignore-phi.ll
>> test_phi
>> WARNING: Missing line 3
>> CheckFunctionDebugify [HelloWorldPass]: PASS
I think we should skip PHI nodes for applying debug locations as well.
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