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Back out my previous patch; causes bootstrap problem for Ada (86 Linux) 

From-SVN: r53671
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Dale Johannesen 2002-05-20 18:20:45 +00:00 committed by Dale Johannesen
parent 6a4d67604e
commit 4c11675d61
2 changed files with 10 additions and 8 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2002-05-20 Dale Johannesen <dalej@apple.com>
* combine.c (cant_combine_insn_p): Back out my
previous patch.
2002-05-20 Kazu Hirata <kazu@cs.umass.edu>
* params.c: Fix formatting.

14
gcc/combine.c
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@ -1460,10 +1460,10 @@ cant_combine_insn_p (insn)
if (! INSN_P (insn))
return 1;
/* Never combine loads and stores involving hard regs that are likely
to be spilled. The register allocator can usually handle such
reg-reg moves by tying. If we allow the combiner to make
substitutions of likely-spilled regs, we may abort in reload.
/* Never combine loads and stores involving hard regs. The register
allocator can usually handle such reg-reg moves by tying. If we allow
the combiner to make substitutions of hard regs, we risk aborting in
reload on machines that have SMALL_REGISTER_CLASSES.
As an exception, we allow combinations involving fixed regs; these are
not available to the register allocator so there's no risk involved. */
@ -1478,11 +1478,9 @@ cant_combine_insn_p (insn)
dest = SUBREG_REG (dest);
if (REG_P (src) && REG_P (dest)
&& ((REGNO (src) < FIRST_PSEUDO_REGISTER
&& ! fixed_regs[REGNO (src)]
&& CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (REGNO (src))))
&& ! fixed_regs[REGNO (src)])
|| (REGNO (dest) < FIRST_PSEUDO_REGISTER
&& ! fixed_regs[REGNO (dest)]
&& CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (REGNO (dest))))))
&& ! fixed_regs[REGNO (dest)])))
return 1;
return 0;