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* expmed.c (expand_mult): Write REG_EQUAL note with proper mode. 

From-SVN: r38306
This commit is contained in:
Richard Kenner 2000-12-16 15:43:55 +00:00 committed by Richard Kenner
parent 3244472df9
commit 23cb454af9
2 changed files with 16 additions and 2 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
Sat Dec 16 10:41:11 2000 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* expmed.c (expand_mult): Write REG_EQUAL note with proper mode.
2000-12-16 Neil Booth <neil@daikokuya.demon.co.uk>
* tradcpp.c: T_WARNING: New.

14
gcc/expmed.c
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@ -2401,6 +2401,7 @@ expand_mult (mode, op0, op1, target, unsignedp)
/* We found something cheaper than a multiply insn. */
int opno;
rtx accum, tem;
enum machine_mode nmode;
op0 = protect_from_queue (op0, 0);
@ -2505,12 +2506,21 @@ expand_mult (mode, op0, op1, target, unsignedp)
}
/* Write a REG_EQUAL note on the last insn so that we can cse
multiplication sequences. */
multiplication sequences. Note that if ACCUM is a SUBREG,
we've set the inner register and must properly indicate
that. */
tem = op0, nmode = mode;
if (GET_CODE (accum) == SUBREG)
{
nmode = GET_MODE (SUBREG_REG (accum));
tem = gen_lowpart (nmode, op0);
}
insn = get_last_insn ();
set_unique_reg_note (insn,
REG_EQUAL,
gen_rtx_MULT (mode, op0,
gen_rtx_MULT (nmode, tem,
GEN_INT (val_so_far)));
}