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* stmt.c (expand_asm_operands): Reload in-out reg-only memory operands. 

From-SVN: r26628
This commit is contained in:
Richard Henderson 1999-04-25 16:06:36 -07:00 committed by Richard Henderson
parent 7e4e2d26dc
commit 947255ed5a
2 changed files with 18 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
Sun Apr 25 23:03:32 1999 Richard Henderson <rth@cygnus.com>
* stmt.c (expand_asm_operands): Reload in-out reg-only memory operands.
Sun Apr 25 13:06:13 1999 Richard Henderson <rth@cygnus.com>
* function.c (assign_parms/STACK_BYTES): Revert last change,

15
gcc/stmt.c
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@ -1183,6 +1183,7 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
/* Vector of RTX's of evaluated output operands. */
rtx *output_rtx = (rtx *) alloca (noutputs * sizeof (rtx));
int *inout_opnum = (int *) alloca (noutputs * sizeof (int));
rtx *real_output_rtx = (rtx *) alloca (noutputs * sizeof (rtx));
enum machine_mode *inout_mode
= (enum machine_mode *) alloca (noutputs * sizeof (enum machine_mode));
/* The insn we have emitted. */
@ -1360,6 +1361,7 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
Make the asm insn write into that, then our caller will copy it to
the real output operand. Likewise for promoted variables. */
real_output_rtx[i] = NULL_RTX;
if ((TREE_CODE (val) == INDIRECT_REF
&& allows_mem)
|| (TREE_CODE_CLASS (TREE_CODE (val)) == 'd'
@ -1379,7 +1381,12 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
if (! allows_reg && GET_CODE (output_rtx[i]) != MEM)
error ("output number %d not directly addressable", i);
if (! allows_mem && GET_CODE (output_rtx[i]) == MEM)
error ("output number %d not restored to memory", i);
{
real_output_rtx[i] = protect_from_queue (output_rtx[i], 1);
output_rtx[i] = gen_reg_rtx (GET_MODE (output_rtx[i]));
if (is_inout)
emit_move_insn (output_rtx[i], real_output_rtx[i]);
}
}
else
{
@ -1662,6 +1669,12 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
insn = emit_insn (body);
}
/* For any outputs that needed reloading into registers, spill them
back to where they belong. */
for (i = 0; i < noutputs; ++i)
if (real_output_rtx[i])
emit_move_insn (real_output_rtx[i], output_rtx[i]);
free_temp_slots ();
}