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(expand_asm_operands): Properly handle output that can't be directly

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written into.

From-SVN: r9272
This commit is contained in:
Richard Kenner 1995-03-31 08:19:01 -05:00
parent d161fae48b
commit b50a024db7
1 changed files with 19 additions and 20 deletions
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39
gcc/stmt.c
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@ -1402,6 +1402,7 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++)
{
tree val = TREE_VALUE (tail);
tree type = TREE_TYPE (val);
tree val1;
int j;
int found_equal;
@ -1429,31 +1430,29 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
return;
}
/* If an output operand is not a variable or indirect ref,
or a part of one,
create a SAVE_EXPR which is a pseudo-reg
to act as an intermediate temporary.
Make the asm insn write into that, then copy it to
the real output operand. */
/* If an output operand is not a decl or indirect ref,
make a temporary to act as an intermediate. Make the asm insn
write into that, then our caller will copy it to the real output
operand. Likewise for promoted variables. */
while (TREE_CODE (val) == COMPONENT_REF
|| TREE_CODE (val) == ARRAY_REF)
val = TREE_OPERAND (val, 0);
if (TREE_CODE (val) != VAR_DECL
&& TREE_CODE (val) != PARM_DECL
&& TREE_CODE (val) != INDIRECT_REF)
if (TREE_CODE (val) == INDIRECT_REF
|| (TREE_CODE_CLASS (TREE_CODE (val)) == 'd'
&& ! (GET_CODE (DECL_RTL (val)) == REG
&& GET_MODE (DECL_RTL (val)) != TYPE_MODE (type))))
output_rtx[i] = expand_expr (TREE_VALUE (tail), NULL_RTX, VOIDmode, 0);
else
{
TREE_VALUE (tail) = save_expr (TREE_VALUE (tail));
/* If it's a constant, print error now so don't crash later. */
if (TREE_CODE (TREE_VALUE (tail)) != SAVE_EXPR)
if (TYPE_MODE (type) == BLKmode)
{
error ("invalid output in `asm'");
return;
output_rtx[i] = assign_stack_temp (BLKmode,
int_size_in_bytes (type), 0);
MEM_IN_STRUCT_P (output_rtx[i]) = AGGREGATE_TYPE_P (type);
}
}
else
output_rtx[i] = gen_reg_rtx (TYPE_MODE (type));
output_rtx[i] = expand_expr (TREE_VALUE (tail), NULL_RTX, VOIDmode, 0);
TREE_VALUE (tail) = make_tree (type, output_rtx[i]);
}
}
if (ninputs + noutputs > MAX_RECOG_OPERANDS)