...as suggested by Richard. This means that out-of-range shift values
produce the same results on all targets at the tree level. The rtl level
isn't affected since it explicitly truncates the count.
Tested on mips64-linux-gnu. OK to install?
Thanks,
Richard
gcc/
* double-int.c (lshift_double, rshift_double): Remove
SHIFT_COUNT_TRUNCATED handling.
Index: gcc/double-int.c
===================================================================
--- gcc/double-int.c 2013-09-28 09:41:49.490113799 +0100
+++ gcc/double-int.c 2013-11-04 15:49:56.963164424 +0000
@@ -20,7 +20,7 @@ Free Software Foundation; either version
#include "config.h"
#include "system.h"
#include "coretypes.h"
-#include "tm.h" /* For SHIFT_COUNT_TRUNCATED. */
+#include "tm.h" /* For BITS_PER_UNIT and *_BIG_ENDIAN.
*/
#include "tree.h"
static int add_double_with_sign (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
@@ -237,9 +237,6 @@ rshift_double (unsigned HOST_WIDE_INT l1
? -((unsigned HOST_WIDE_INT) h1 >> (HOST_BITS_PER_WIDE_INT - 1))
: 0);
- if (SHIFT_COUNT_TRUNCATED)
- count %= prec;
-
if (count >= HOST_BITS_PER_DOUBLE_INT)
{
/* Shifting by the host word size is undefined according to the
@@ -295,9 +292,6 @@ lshift_double (unsigned HOST_WIDE_INT l1
{
unsigned HOST_WIDE_INT signmask;
- if (SHIFT_COUNT_TRUNCATED)
- count %= prec;
-
if (count >= HOST_BITS_PER_DOUBLE_INT)
{
/* Shifting by the host word size is undefined according to the
