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-rw-r--r--gcc/jump.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/jump.c b/gcc/jump.c
index 0378cf7c55e..85c1f6b2d75 100644
--- a/gcc/jump.c
+++ b/gcc/jump.c
@@ -248,6 +248,10 @@ squeeze_notes (rtx* startp, rtx* endp)
|| NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG
|| NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END))
{
+ /* BLOCK_BEG or BLOCK_END notes only exist in the `final' pass. */
+ gcc_assert (NOTE_LINE_NUMBER (insn) != NOTE_INSN_BLOCK_BEG
+ && NOTE_LINE_NUMBER (insn) != NOTE_INSN_BLOCK_END);
+
if (insn == start)
start = next;
else