OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

(simplify_binary_operation): Can fold multi-word operations when first is CONST_INT. 

(simplify_binary_operation): Can fold multi-word operations when first is
CONST_INT.
(simplify_binary_operation, case PLUS, MINUS): Don't call plus_constant when
OP0 is VOIDmode.

From-SVN: r6298
This commit is contained in:
Richard Kenner 1993-12-24 06:53:52 -05:00
parent 27f006ebb1
commit fe87324067
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
gcc/cse.c
View File

@ -3321,12 +3321,15 @@ simplify_binary_operation (code, mode, op0, op1)
/* We can fold some multi-word operations. */
if (GET_MODE_CLASS (mode) == MODE_INT
&& GET_CODE (op0) == CONST_DOUBLE
&& (GET_CODE (op0) == CONST_DOUBLE || GET_CODE (op0) == CONST_INT)
&& (GET_CODE (op1) == CONST_DOUBLE || GET_CODE (op1) == CONST_INT))
{
HOST_WIDE_INT l1, l2, h1, h2, lv, hv;
l1 = CONST_DOUBLE_LOW (op0), h1 = CONST_DOUBLE_HIGH (op0);
if (GET_CODE (op0) == CONST_DOUBLE)
l1 = CONST_DOUBLE_LOW (op0), h1 = CONST_DOUBLE_HIGH (op0);
else
l1 = INTVAL (op0), h1 = l1 < 0 ? -1 : 0;
if (GET_CODE (op1) == CONST_DOUBLE)
l2 = CONST_DOUBLE_LOW (op1), h2 = CONST_DOUBLE_HIGH (op1);
@ -3463,11 +3466,15 @@ simplify_binary_operation (code, mode, op0, op1)
/* Handle both-operands-constant cases. We can only add
CONST_INTs to constants since the sum of relocatable symbols
can't be handled by most assemblers. */
can't be handled by most assemblers. Don't add CONST_INT
to CONST_INT since overflow won't be computed properly if wider
than HOST_BITS_PER_WIDE_INT. */
if (CONSTANT_P (op0) && GET_CODE (op1) == CONST_INT)
if (CONSTANT_P (op0) && GET_MODE (op0) != VOIDmode
&& GET_CODE (op1) == CONST_INT)
return plus_constant (op0, INTVAL (op1));
else if (CONSTANT_P (op1) && GET_CODE (op0) == CONST_INT)
else if (CONSTANT_P (op1) && GET_MODE (op1) != VOIDmode
&& GET_CODE (op0) == CONST_INT)
return plus_constant (op1, INTVAL (op0));
/* If one of the operands is a PLUS or a MINUS, see if we can
@ -3542,7 +3549,7 @@ simplify_binary_operation (code, mode, op0, op1)
return tem;
/* Don't let a relocatable value get a negative coeff. */
if (GET_CODE (op1) == CONST_INT)
if (GET_CODE (op1) == CONST_INT && GET_MODE (op1) != VOIDmode)
return plus_constant (op0, - INTVAL (op1));
break;