MatCat.OpenSource/8sa1-gcc
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

expr.c (store_expr): If the lhs is a memory location pointed to be a postincremented (or...

Browse Source 
�
        * expr.c (store_expr): If the lhs is a memory location pointed
        to be a postincremented (or postdecremented) pointer, always
        force the rhs to be evaluated into a pseudo.

From-SVN: r24507
This commit is contained in:
Charles M. Hannum 1999-01-05 18:28:56 -07:00 committed by Jeff Law
parent b3fa7e9f2a
commit 12f06d174c
1 changed files with 15 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
gcc/expr.c
View File

@ -3528,21 +3528,6 @@ store_expr (exp, target, want_value)
return want_value ? target : NULL_RTX; return want_value ? target : NULL_RTX;
} }
else if (want_value && GET_CODE (target) == MEM && ! MEM_VOLATILE_P (target)
&& GET_MODE (target) != BLKmode)
/* If target is in memory and caller wants value in a register instead,
arrange that. Pass TARGET as target for expand_expr so that,
if EXP is another assignment, WANT_VALUE will be nonzero for it.
We know expand_expr will not use the target in that case.
Don't do this if TARGET is volatile because we are supposed
to write it and then read it. */
{
temp = expand_expr (exp, cse_not_expected ? NULL_RTX : target,
GET_MODE (target), 0);
if (GET_MODE (temp) != BLKmode && GET_MODE (temp) != VOIDmode)
temp = copy_to_reg (temp);
dont_return_target = 1;
}
else if (queued_subexp_p (target)) else if (queued_subexp_p (target))
/* If target contains a postincrement, let's not risk /* If target contains a postincrement, let's not risk
using it as the place to generate the rhs. */ using it as the place to generate the rhs. */
@ -3562,6 +3547,21 @@ store_expr (exp, target, want_value)
if (! MEM_VOLATILE_P (target) && want_value) if (! MEM_VOLATILE_P (target) && want_value)
dont_return_target = 1; dont_return_target = 1;
} }
else if (want_value && GET_CODE (target) == MEM && ! MEM_VOLATILE_P (target)
&& GET_MODE (target) != BLKmode)
/* If target is in memory and caller wants value in a register instead,
arrange that. Pass TARGET as target for expand_expr so that,
if EXP is another assignment, WANT_VALUE will be nonzero for it.
We know expand_expr will not use the target in that case.
Don't do this if TARGET is volatile because we are supposed
to write it and then read it. */
{
temp = expand_expr (exp, cse_not_expected ? NULL_RTX : target,
GET_MODE (target), 0);
if (GET_MODE (temp) != BLKmode && GET_MODE (temp) != VOIDmode)
temp = copy_to_reg (temp);
dont_return_target = 1;
}
else if (GET_CODE (target) == SUBREG && SUBREG_PROMOTED_VAR_P (target)) else if (GET_CODE (target) == SUBREG && SUBREG_PROMOTED_VAR_P (target))
/* If this is an scalar in a register that is stored in a wider mode /* If this is an scalar in a register that is stored in a wider mode
than the declared mode, compute the result into its declared mode than the declared mode, compute the result into its declared mode