[gcc r11-7066] do not generate fusion.md, update contrib/gcc_update

[gcc r11-7066] do not generate fusion.md, update contrib/gcc_update

[Aaron Sawdey]

https://gcc.gnu.org/g:05c93a63a6be522b814cc03629751a7bc9b78b99

commit r11-7066-g05c93a63a6be522b814cc03629751a7bc9b78b99
Author: Aaron Sawdey <acsawdey@linux.ibm.com>
Date:   Mon Feb 1 13:01:33 2021 -0600

    do not generate fusion.md, update contrib/gcc_update
    
    In a previous fusion-combine patch for rs6000, Segher had asked me to
    comment out the automatic regeneration of fusion.md. And more recently
    Edelsohn pointed out that gcc_update needed to fix the timestamp of
    fusion.md so it didn't get unnecessarily regenerated.
    
    contrib/ChangeLog:
    
            * gcc_update (files_and_dependencies): Add dependency for
            gcc/config/rs6000/fusion.md on gcc/config/rs6000/genfusion.md.
    
    gcc/ChangeLog:
    
            * config/rs6000/t-rs6000: Comment out auto generation of
            fusion.md for now.

Diff:
---
 contrib/gcc_update         | 1 +
 gcc/config/rs6000/t-rs6000 | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/contrib/gcc_update b/contrib/gcc_update
index 43d284d8125..45a27b76cc3 100755
--- a/contrib/gcc_update
+++ b/contrib/gcc_update
@@ -89,6 +89,7 @@ gcc/config/c6x/c6x-mult.md: gcc/config/c6x/c6x-mult.md.in gcc/config/c6x/genmult
 gcc/config/m68k/m68k-tables.opt: gcc/config/m68k/m68k-devices.def gcc/config/m68k/m68k-isas.def gcc/config/m68k/m68k-microarchs.def gcc/config/m68k/genopt.sh
 gcc/config/mips/mips-tables.opt: gcc/config/mips/mips-cpus.def gcc/config/mips/genopt.sh
 gcc/config/rs6000/rs6000-tables.opt: gcc/config/rs6000/rs6000-cpus.def gcc/config/rs6000/genopt.sh
+gcc/config/rs6000/fusion.md: gcc/config/rs6000/genfusion.pl
 gcc/config/tilegx/mul-tables.c: gcc/config/tilepro/gen-mul-tables.cc
 gcc/config/tilepro/mul-tables.c: gcc/config/tilepro/gen-mul-tables.cc
 # And then, language-specific files
diff --git a/gcc/config/rs6000/t-rs6000 b/gcc/config/rs6000/t-rs6000
index e3a58bf31bf..1541a653738 100644
--- a/gcc/config/rs6000/t-rs6000
+++ b/gcc/config/rs6000/t-rs6000
@@ -47,8 +47,8 @@ rs6000-call.o: $(srcdir)/config/rs6000/rs6000-call.c
 	$(COMPILE) $<
 	$(POSTCOMPILE)
 
-$(srcdir)/config/rs6000/fusion.md: $(srcdir)/config/rs6000/genfusion.pl
-	$(srcdir)/config/rs6000/genfusion.pl > $(srcdir)/config/rs6000/fusion.md
+#$(srcdir)/config/rs6000/fusion.md: $(srcdir)/config/rs6000/genfusion.pl
+#	$(srcdir)/config/rs6000/genfusion.pl > $(srcdir)/config/rs6000/fusion.md
 
 $(srcdir)/config/rs6000/rs6000-tables.opt: $(srcdir)/config/rs6000/genopt.sh \
   $(srcdir)/config/rs6000/rs6000-cpus.def