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(expand_call): Always allocate TARGET in mode of result expression; 

VALREG might have been promoted.
Ensure TARGET is a REG when checking for promotion and verify that we
get back the mode we expect.

From-SVN: r3907
This commit is contained in:
Richard Kenner 1993-03-28 20:26:03 -05:00
parent 994571561f
commit 5d2ac65e2b
1 changed files with 9 additions and 3 deletions
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12
gcc/calls.c
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@ -1834,10 +1834,12 @@ expand_call (exp, target, ignore)
target = copy_to_reg (valreg);
#ifdef PROMOTE_FUNCTION_RETURN
/* If we promoted this return value, make the proper SUBREG. */
if (GET_MODE (target) != TYPE_MODE (TREE_TYPE (exp)))
/* If we promoted this return value, make the proper SUBREG. TARGET
might be const0_rtx here, so be careful. */
if (GET_CODE (target) == REG
&& GET_MODE (target) != TYPE_MODE (TREE_TYPE (exp)))
{
enum machine_mode mode = GET_MODE (target);
enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp));
int unsignedp = TREE_UNSIGNED (TREE_TYPE (exp));
if (TREE_CODE (TREE_TYPE (exp)) == INTEGER_TYPE
@ -1851,6 +1853,10 @@ expand_call (exp, target, ignore)
PROMOTE_MODE (mode, unsignedp, TREE_TYPE (exp));
}
/* If we didn't promote as expected, something is wrong. */
if (mode != GET_MODE (target))
abort ();
target = gen_rtx (SUBREG, TYPE_MODE (TREE_TYPE (exp)), target, 0);
SUBREG_PROMOTED_VAR_P (target) = 1;
SUBREG_PROMOTED_UNSIGNED_P (target) = unsignedp;