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(FINAL_PRESCAN_INSN): Define. 

From-SVN: r7012
This commit is contained in:
Richard Kenner 1994-04-09 17:48:01 -04:00
parent 74f171be20
commit 9894a29157
1 changed files with 10 additions and 2 deletions
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12
gcc/config/rs6000/rs6000.h
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@ -1282,9 +1282,17 @@ struct rs6000_args {int words, fregno, nargs_prototype; };
}
/* Define this if some processing needs to be done immediately before
emitting code for an insn. */
emitting code for an insn.
/* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */
For the RS/6000, we check if there is a dead PRE_INC value. If so,
replace it with a normal displacement. This is done in case the
output of the load insn duplicates the register being incremented.
That produces an insn that isn't valid for PowerPC. */
#define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) \
if (find_reg_note (INSN, REG_INC, NULL_RTX) \
&& find_reg_note (INSN, REG_DEAD, NULL_RTX)) \
rs6000_convert_preincs (PATTERN (INSN), INSN);
/* Specify the machine mode that this machine uses
for the index in the tablejump instruction. */