egcs-2.90.02 970825, hppa1.1-hp-hpux9.01 bootstraps okay

egcs-2.90.02 970825, hppa1.1-hp-hpux9.01 bootstraps okay

[Kaveh R. Ghazi]

	I bootstrapped egcs-2.90.02 970825 on hppa1.1-hp-hpux9.01 using
BOOTCFLAGS='-O3 -funroll-all-loops' and cc for stage1 with native as/ld. 
I got a clean "make compare" and identical c-torture results with those
of gcc2-970721.  (Later gcc2 snapshots don't bootstrap for me.)

		--Kaveh
--
Kaveh R. Ghazi				Project Manager
ghazi@caip.rutgers.edu			ICon CMT Corp.

Re: egcs release

[Jim Wilson]

	Wed Jul 30 14:43:34 1997  H.J. Lu  (hjl@gnu.ai.mit.edu)

		* sched.c (sched_analyze_2): Handle access stack memory
		beyond the stack pointer via the frame pointer.
		(STACK_POINTER_REG_NREGS): New. Default as 1.

We already have a patch installed that fixes this, and which works for
both the old (sched.c) and new (haifa-sched.c) schedulers.  Patches that
only fix sched.c aren't very userful anymore.

	Sun Jul 13 13:39:15 1997  H.J. Lu  (hjl@gnu.ai.mit.edu)

		* sched.c (sched_analyze_2): Handle USE_PIC_OFFSET_TABLE_REG if
		defined.
		(PIC_OFFSET_TABLE_REG_NREGS): New. Default as 1.

		* config/i386/i386.h (USE_PIC_OFFSET_TABLE_REG): New. True if
		the PIC base register is used.

I suggest we use this patch.  This fixes the testcase that you wrote your
patch for, and works for both schedulers.

Wed Aug 27 14:52:54 1997  Jim Wilson  <wilson@cygnus.com>

	* i386.c (ix86_expand_epilogue): Emit blockage instruction when pic.

Index: i386.c
===================================================================
RCS file: /cvs/cvsfiles/egcs/gcc/config/i386/i386.c,v
retrieving revision 1.1.1.1
diff -p -r1.1.1.1 i386.c
*** i386.c	1997/08/11 15:57:16	1.1.1.1
--- i386.c	1997/08/27 21:52:31
*************** ix86_expand_epilogue ()
*** 2128,2133 ****
--- 2128,2143 ----
  
    xops[2] = stack_pointer_rtx;
  
+   /* When -fpic, we must emit a scheduling barrier, so that the instruction
+      that restores %ebx (which is PIC_OFFSET_TABLE_REGNUM), does not get
+      moved before any instruction which implicitly uses the got.  This
+      includes any instruction which uses a SYMBOL_REF or a LABEL_REF.
+ 
+      Alternatively, this could be fixed by making the dependence on the
+      PIC_OFFSET_TABLE_REGNUM explicit in the RTL.  */
+   if (flag_pic)
+     emit_insn (gen_blockage ());
+ 
    if (nregs > 1 || ! frame_pointer_needed)
      {
        if (frame_pointer_needed)

Re: egcs-2.90.02 970825, hppa1.1-hp-hpux9.01 bootstraps okay

[Jeffrey A Law]

  In message <199708272133.RAA18344@caip.rutgers.edu>you write:
  > 	I bootstrapped egcs-2.90.02 970825 on hppa1.1-hp-hpux9.01 using
  > BOOTCFLAGS='-O3 -funroll-all-loops' and cc for stage1 with native as/ld. 
  > I got a clean "make compare" and identical c-torture results with those
  > of gcc2-970721.  (Later gcc2 snapshots don't bootstrap for me.)
Good/bad.

Good that we generate idential c-torture results, bad because
later gcc2 snapshots don't bootstrap.

Odds are this is a reload issue that I tried to explain to
Kenner without much success.  I'm going to have to take another
stab at it within the next couple days.

[ egcs has code to avoid the reload problem... ]

jeff