https://llvm.org/bugs/show_bug.cgi?id=27299
Bug ID: 27299
Summary: IRPGO crashes calling getBBInfo on BB not in BBInfos
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Miscellaneous Instrumentation passes
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 16193
--> https://llvm.org/bugs/attachment.cgi?id=16193&action=edit
Minimal reproducer. Requires attached profdata.
When applying prof data to a function with 2 Basic Blocks where the 2nd is
unreachable, the IRPGO pass crashes. I believe this is due to the unreachable
block not being entered into BBInfos in CFGMST and then later having getBBInfo
called on it. I will attach a patch which applies one of a couple solutions.
The attached profdata has a few counts for the entry block.
Minimal repro shown below and attached:
declare void @foo(%footype*) unnamed_addr #1 align 2
define void @mainfunc(%footype* %this) unnamed_addr #1 align 2 {
entry:
unreachable
foo.exit: ; No predecessors!
ret void
}
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