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sh.md (movdf): When splitting load into pair of registers...

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* config/sh/sh.md (movdf): When splitting load into pair of
registers, don't clobber the register used in the address too
early.

From-SVN: r38722
This commit is contained in:
Alexandre Oliva 2001-01-05 20:30:40 +00:00 committed by Alexandre Oliva
parent fcbd8ef220
commit 18a7c2a7a1
2 changed files with 29 additions and 9 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2001-01-05 Alexandre Oliva <aoliva@redhat.com>
* config/sh/sh.md (movdf): When splitting load into pair of
registers, don't clobber the register used in the address too
early.
2001-01-05 Jeffrey Oldham <oldham@codesourcery.com>
* varasm.c (mark_constant_pool): Improve initial comments.

32
gcc/config/sh/sh.md
View File

@ -2745,15 +2745,29 @@
offset = 4;
mem = copy_rtx (mem);
PUT_MODE (mem, SImode);
word0 = gen_rtx(SUBREG, SImode, regop, 0);
emit_insn (store_p
? gen_movsi_ie (mem, word0) : gen_movsi_ie (word0, mem));
emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (offset)));
mem = copy_rtx (mem);
word1 = gen_rtx(SUBREG, SImode, regop, 1);
emit_insn (store_p
? gen_movsi_ie (mem, word1) : gen_movsi_ie (word1, mem));
emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (-offset)));
word0 = alter_subreg (gen_rtx (SUBREG, SImode, regop, 0));
word1 = alter_subreg (gen_rtx (SUBREG, SImode, regop, 1));
if (store_p || ! refers_to_regno_p (REGNO (word0),
REGNO (word0) + 1, addr, 0))
{
emit_insn (store_p
? gen_movsi_ie (mem, word0)
: gen_movsi_ie (word0, mem));
emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (offset)));
mem = copy_rtx (mem);
emit_insn (store_p
? gen_movsi_ie (mem, word1)
: gen_movsi_ie (word1, mem));
emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (-offset)));
}
else
{
emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (offset)));
emit_insn (gen_movsi_ie (word1, mem));
emit_insn (gen_addsi3 (reg0, reg0, GEN_INT (-offset)));
mem = copy_rtx (mem);
emit_insn (gen_movsi_ie (word0, mem));
}
DONE;
}
}