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Do not generate CLOBBERs for non-pseudo regs. 

From-SVN: r24364
This commit is contained in:
Nick Clifton 1998-12-17 14:02:32 +00:00 committed by Nick Clifton
parent 3cdbd1f8ac
commit b2e7e6fb8a
2 changed files with 27 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Thu Dec 17 13:57:23 1998 Nick Clifton <nickc@cygnus.com>
* expr.c (emit_move_insn_1): Only emit a clobber if the target
is a pseudo register.
Thu Dec 17 13:50:29 1998 Nick Clifton <nickc@cygnus.com>
* gcse.c: Include expr.h in order to get the prototype for

26
gcc/expr.c
View File

@ -2593,9 +2593,18 @@ emit_move_insn_1 (x, y)
}
else
{
/* Show the output dies here. */
/* Show the output dies here. This is only necessary for pseudos. */
if (x != y)
emit_insn (gen_rtx_CLOBBER (VOIDmode, x));
{
rtx reg = x;
while (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);
if (GET_CODE (reg) == REG
&& REGNO (reg) >= FIRST_PSEUDO_REGISTER)
emit_insn (gen_rtx_CLOBBER (VOIDmode, x));
}
emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code)
(gen_realpart (submode, x), gen_realpart (submode, y)));
@ -2624,9 +2633,18 @@ emit_move_insn_1 (x, y)
}
#endif
/* Show the output dies here. */
/* Show the output dies here. This is only necessary for pseudos. */
if (x != y)
emit_insn (gen_rtx_CLOBBER (VOIDmode, x));
{
rtx reg = x;
while (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);
if (GET_CODE (reg) == REG
&& REGNO (reg) >= FIRST_PSEUDO_REGISTER)
emit_insn (gen_rtx_CLOBBER (VOIDmode, x));
}
for (i = 0;
i < (GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;