[Bug debug/81278] [8 Regression] -fcompare-debug failure (length)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81278

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Anyway, I've reproduced it on x86_64-linux with the unreduced testcase, trying
to find which pass starts the differences on
_ZNK4llvm12DenseMapBaseINS_8DenseMapIPNS_26DIGlobalVariableExpressionENS_6detail13DenseSetEmptyENS_10MDNodeInfoIS2_EENS4_12DenseSetPairIS3_EEEES3_S5_S7_S9_E15LookupBucketForIS3_EEbRKT_RPKS9_