OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

*** empty log message *** 

From-SVN: r947
This commit is contained in:
Richard Stallman 1992-05-09 18:45:46 +00:00
parent 81dd58a68e
commit 830a38eec6
1 changed files with 23 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
gcc/cse.c
View File

@ -742,7 +742,7 @@ make_regs_eqv (new, old)
if (! (firstr < FIRST_PSEUDO_REGISTER && FIXED_REGNO_P (firstr))
/* Certain fixed registers might be of the class NO_REGS. This means
that not only can they not be allocated by the compiler, but
they cannot be used in substitutions or cannonicallizations
they cannot be used in substitutions or canonicalizations
either. */
&& (new >= FIRST_PSEUDO_REGISTER || REGNO_REG_CLASS (new) != NO_REGS)
&& ((new < FIRST_PSEUDO_REGISTER && FIXED_REGNO_P (new))
@ -1129,7 +1129,7 @@ lookup_as_function (x, code)
goes in front, except that the first element in the list
remains first unless a cheaper element is added. The order of
pseudo-registers does not matter, as canon_reg will be called to
find the cheapest when a register is retreived from the table.
find the cheapest when a register is retrieved from the table.
The in_memory field in the hash table element is set to 0.
The caller must set it nonzero if appropriate.
@ -3785,6 +3785,22 @@ simplify_binary_operation (code, mode, op0, op1)
/* Do nothing here. */
return 0;
case SMIN:
val = arg0s <= arg1s ? arg0s : arg1s;
break;
case UMIN:
val = (unsigned int)arg0 <= (unsigned int)arg1 ? arg0 : arg1;
break;
case SMAX:
val = arg0s > arg1s ? arg0s : arg1s;
break;
case UMAX:
val = (unsigned int)arg0 > (unsigned int)arg1 ? arg0 : arg1;
break;
default:
abort ();
}
@ -5299,13 +5315,15 @@ cse_insn (insn, in_libcall_block)
and we should not substitute some other register
which is not supposed to be clobbered.
Therefore, this loop cannot be merged into the one below
because a CALL may preceed a CLOBBER and refer to the
because a CALL may precede a CLOBBER and refer to the
value clobbered. We must not let a canonicalization do
anything in that case. */
for (i = 0; i < lim; i++)
{
register rtx y = XVECEXP (x, 0, i);
if (GET_CODE (y) == CLOBBER && GET_CODE (XEXP (y, 0)) == REG)
if (GET_CODE (y) == CLOBBER
&& (GET_CODE (XEXP (y, 0)) == REG
|| GET_CODE (XEXP (y, 0)) == SUBREG))
invalidate (XEXP (y, 0));
}
@ -7383,7 +7401,7 @@ cse_basic_block (from, to, next_branch, around_loop)
/* Track when we are inside in LIBCALL block. Inside such a block,
we do not want to record destinations. The last insn of a
LIBCALL block is not considered to be part of the block, since
its desitination is the result of the block and hence should be
its destination is the result of the block and hence should be
recorded. */
if (find_reg_note (insn, REG_LIBCALL, 0))