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* sh.md (mulsi3): Don't add a no-op move at the end.

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From-SVN: r27554
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J"orn Rennecke 1999-06-16 17:46:20 +00:00 committed by Joern Rennecke
parent 96559bc552
commit 78d114ef2d
2 changed files with 5 additions and 9 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
Thu Jun 17 01:45:24 1999 J"orn Rennecke <amylaar@cygnus.co.uk>
* sh.md (mulsi3): Don't add a no-op move at the end.
Wed Jun 16 20:29:00 1999 J"orn Rennecke <amylaar@cygnus.co.uk>
* cse.c (cse_insn): Don't put hard register source into tables for

10
gcc/config/sh/sh.md
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@ -1112,20 +1112,12 @@
else
{
rtx macl = gen_rtx_REG (SImode, MACL_REG);
rtx giv_insn;
first = emit_insn (gen_mul_l (operands[1], operands[2]));
/* consec_sets_giv can only recognize the first insn that sets a
giv as the giv insn. So we must tag this also with a REG_EQUAL
note. */
giv_insn = emit_insn (gen_movsi_i ((operands[0]), macl));
REG_NOTES (giv_insn)
= gen_rtx_EXPR_LIST (REG_EQUAL,
gen_rtx_MULT (SImode, operands[1], operands[2]),
REG_NOTES (giv_insn));
/* The sequence must end in a no-op move, lest cse puts macl in its
tables and does invalid substitutions. */
last = emit_insn (gen_movsi_i ((operands[0]), operands[0]));
last = emit_insn (gen_movsi_i ((operands[0]), macl));
}
/* Wrap the sequence in REG_LIBCALL / REG_RETVAL notes so that loop
invariant code motion can move it. */