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(output_move_double): Handle reg[n,n+1] = mem[reg[n] + reg[n+1]]. 

From-SVN: r4742
This commit is contained in:
Richard Stallman 1993-06-26 07:44:01 +00:00
parent ae49c611b6
commit bdec790ce6
1 changed files with 13 additions and 2 deletions
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15
gcc/config/sparc/sparc.c
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@ -1156,8 +1156,19 @@ output_move_double (operands)
else if (optype0 == REGOP && optype1 != REGOP
&& reg_overlap_mentioned_p (op0, op1))
{
/* ??? This fails if the address is a double register address, each
of which is clobbered by operand 0. */
if (reg_mentioned_p (op0, XEXP (op1, 0))
&& reg_mentioned_p (latehalf[0], XEXP (op1, 0)))
{
/* If both halves of dest are used in the src memory address,
add the two regs and put them in the low reg (op0).
Then it works to load latehalf first. */
rtx xops[2];
xops[0] = latehalf[0];
xops[1] = op0;
output_asm_insn ("add %1,%0,%1", xops);
operands[1] = gen_rtx (MEM, DImode, latehalf[0]);
latehalf[1] = adj_offsettable_operand (operands[1], 4);
}
/* Do the late half first. */
output_asm_insn (singlemove_string (latehalf), latehalf);
/* Then clobber. */