https://llvm.org/bugs/show_bug.cgi?id=25326
Bug ID: 25326
Summary: Broken module: CleanupPadInst not the first non-PHI
instruction in the block
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Global Analyses
Assignee: unassignedb...@nondot.org
Reporter: a...@crichton.co
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 15166
--> https://llvm.org/bugs/attachment.cgi?id=15166&action=edit
failing IR
When running `llc` over the LLVM IR attached, it will emit:
CleanupPadInst not the first non-PHI instruction in the block.
%cleanuppadi4.i.i.i = cleanuppad []
The unwind destination does not have an exception handling instruction!
invoke fastcc void
@"_ZN3vec13_$LT$impl$GT$7reserve7reserve20h8370453893456365494E"(%"3.collections::vec::Vec<middle::ty::ProjectionPredicate>"*
noalias nonnull dereferenceable(12) %vectori4.i.i, i32 %227)
to label %normal-return5.i.normal-return10.i_crit_edgei4.i.i unwind
label %unwind_custom_i4.i.i.i, !noalias !208
LLVM ERROR: Broken function found, compilation aborted!
When checking the IR, however, it looks like the `cleanuppad` instruction is
the first non-phi instruction in the block?
unwind_custom_i4.i.i.i:
%.lcssa178 = phi %"..."* [ %175, %normal-return5i4.i.i.i ]
%.pre.i.i.i.2672.i313i4.i.i.lcssa176 = phi %"..."* [
%.pre.i.i.i.2672.i313i4.i.i, %normal-return5i4.i.i.i ]
%cleanuppadi4.i.i.i = cleanuppad []
br label %loop_body.i.i.i.28i4.i.i.i
I wasn't really quite sure what was going wrong here, and it may be some
invalid IR elsewhere in the file (sorry, I couldn't get bugpoint to reduce it
further), but perhaps there's something odd going on?
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