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[PATCH] Fix undefined behaviour in rx port

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[PATCH] Fix undefined behaviour in rx port
        * config/rx/constraints.md (Int08): Fix undefined left shift
        behaviour.
        (Sint08, Sint16, Sint24): Likewise.
        * config/rx/rx.c (rx_get_stack_layout): Likewise.

From-SVN: r228254
This commit is contained in:
Jeff Law 2015-09-29 10:32:45 -06:00 • committed by Jeff Law
parent 5c4b7f1c1c
commit a53378d25f
3 changed files with 11 additions and 6 deletions
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5
gcc/ChangeLog
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@ -12,6 +12,11 @@
2015-09-29 Jeff Law <law@redhat.com>
* config/rx/constraints.md (Int08): Fix undefined left shift
behaviour.
(Sint08, Sint16, Sint24): Likewise.
* config/rx/rx.c (rx_get_stack_layout): Likewise.
* config/rl78/rl78-expand.md (movqi): Fix undefined left shift
behaviour.

8
gcc/config/rx/constraints.md
View file

@ -28,28 +28,28 @@
(define_constraint "Int08"
"@internal A signed or unsigned 8-bit immediate value"
(and (match_code "const_int")
(match_test "IN_RANGE (ival, (-1 << 8), (1 << 8) - 1)")
(match_test "IN_RANGE (ival, (HOST_WIDE_INT_M1U << 8), (1 << 8) - 1)")
)
)
(define_constraint "Sint08"
"@internal A signed 8-bit immediate value"
(and (match_code "const_int")
(match_test "IN_RANGE (ival, (-1 << 7), (1 << 7) - 1)")
(match_test "IN_RANGE (ival, (HOST_WIDE_INT_M1U << 7), (1 << 7) - 1)")
)
)
(define_constraint "Sint16"
"@internal A signed 16-bit immediate value"
(and (match_code "const_int")
(match_test "IN_RANGE (ival, (-1 << 15), (1 << 15) - 1)")
(match_test "IN_RANGE (ival, (HOST_WIDE_INT_M1U << 15), (1 << 15) - 1)")
)
)
(define_constraint "Sint24"
"@internal A signed 24-bit immediate value"
(and (match_code "const_int")
(match_test "IN_RANGE (ival, (-1 << 23), (1 << 23) - 1)")
(match_test "IN_RANGE (ival, (HOST_WIDE_INT_M1U << 23), (1 << 23) - 1)")
)
)

4
gcc/config/rx/rx.c
View file

@ -1561,7 +1561,7 @@ rx_get_stack_layout (unsigned int * lowest,
PUSHM.
FIXME: Is it worth improving this heuristic ? */
pushed_mask = (-1 << low) & ~(-1 << (high + 1));
pushed_mask = (HOST_WIDE_INT_M1U << low) & ~(HOST_WIDE_INT_M1U << (high + 1));
unneeded_pushes = (pushed_mask & (~ save_mask)) & pushed_mask;
if ((fixed_reg && fixed_reg <= high)
@ -1667,7 +1667,7 @@ ok_for_max_constant (HOST_WIDE_INT val)
/* rx_max_constant_size specifies the maximum number
of bytes that can be used to hold a signed value. */
return IN_RANGE (val, (-1 << (rx_max_constant_size * 8)),
return IN_RANGE (val, (HOST_WIDE_INT_M1U << (rx_max_constant_size * 8)),
( 1 << (rx_max_constant_size * 8)));
}