https://llvm.org/bugs/show_bug.cgi?id=27938
Bug ID: 27938
Summary: The scalarizer pass remove debugloc from call
instruction
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 16437
--> https://llvm.org/bugs/attachment.cgi?id=16437&action=edit
Reproducer: opt -S -scalarizer -o - foo.ll
The scalarizer pass (-scalarizer) remove the debugloc from a call instruction.
The verifier pass later give the error message:
inlinable function call in a function with debug info must have a !dbg location
%_tmp7 = tail call i16 @f1()
LLVM ERROR: Broken function found, compilation aborted!
The problem seems to be in the method Scalarizer::transferMetadata() that
always transfer the debugloc regardless of if the debugloc that is being
transfered is set or not. I'm also a bit unsure if it is a good idea to
overwrite the debugloc of an instruction that already got a perfectly fine
debugloc, why is it guaranteed that the new one is better?
Reproducer:
opt -S -scalarizer -o - foo.ll
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