[Bug target/32481] ICE in df_refs_verify, at df-scan.c:4058

[spark at gcc dot gnu dot org]

------- Comment #6 from spark at gcc dot gnu dot org  2007-06-25 23:13 -------
This patch:

diff -r 36792eca786a gcc/combine.c
--- a/gcc/combine.c     Sat Jun 23 16:21:43 2007 +0000
+++ b/gcc/combine.c     Mon Jun 25 23:10:32 2007 +0000
@@ -2849,6 +2849,7 @@ try_combine (rtx i3, rtx i2, rtx i1, int

              PATTERN (i3) = newpat;
              adjust_for_new_dest (i3);
+             df_insn_rescan (i3);
            }
        }
     }

at least fixes the immediate problem,
though it's not yet completely clear whether this is the right approach
as I don't know whether the PATTERN (i3) change above 
is supposed to be permanent or not.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32481