================
@@ -448,6 +455,9 @@ BasicBlock::const_iterator
BasicBlock::getFirstNonPHIOrDbgOrAlloca() const {
++InsertPt;
}
}
+
+ // Signal that this comes after any debug records.
+ InsertPt.setHeadBit(false);
----------------
jmorse wrote:
The other two call-sites always generate iterators with a false head bit
anyway, but there's a path from `getFirstNonPHIIt` to this line without
InsertPt being assigned a different iterator. `getFirstNonPHIIt` will set the
head bit, therefore we have to explicitly clear it here to ensure the position
is "after" any debug records.
https://github.com/llvm/llvm-project/pull/124287
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