[Bug bootstrap/78390] [7 Regression] Bootstrap failure: match.pd: cannot determine type of operand

[vogt at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78390

--- Comment #25 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
A quick regression test with both patches; s390x with just -m64 and
-languages=c has only two failures left:

+FAIL: gcc.target/s390/risbg-ll-1.c scan-assembler
f43:\\n\\trisbg\\t%r2,%r2,32,128\\\\+61,64-12
+FAIL: gcc.target/s390/risbg-ll-2.c scan-assembler
f9:\\n\\trisbg\\t%r3,%r2,48,63,64-48

This is probably not a bug in the patch, its just that the patterns for the
RISBG instruction are very sensitive to any change in rtl.  Maybe you'd like to
have a quick look aat those two tests to verify they are not cause by an
obivous bug.  If that's not the case I can take over fixing them - I'm working
on related patterns anyway, and they're awful to understand.