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re PR tree-optimization/56064 (Optimize VIEW_CONVERT_EXPR with FIXED_CST) 

gcc/
	PR tree-optimization/56064
	* fixed-value.c (fixed_from_double_int): Sign/zero extend payload
	bits according to mode.
	* fixed-value.h (fixed_from_double_int)
	(const_fixed_from_double_int): Adjust comments.

gcc/testsuite/
	PR tree-optimization/56064
	* gcc.dg/fixed-point/view-convert-2.c: New test.

From-SVN: r195885
This commit is contained in:
Georg-Johann Lay 2013-02-08 13:23:34 +00:00 committed by Georg-Johann Lay
parent e45cde9826
commit ff54464986
5 changed files with 162 additions and 4 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2013-02-08 Georg-Johann Lay <avr@gjlay.de>
PR tree-optimization/56064
* fixed-value.c (fixed_from_double_int): Sign/zero extend payload
bits according to mode.
* fixed-value.h (fixed_from_double_int)
(const_fixed_from_double_int): Adjust comments.
2013-02-08 Richard Biener <rguenther@suse.de>
PR lto/56231

10
gcc/fixed-value.c
View File

@ -83,7 +83,7 @@ check_real_for_fixed_mode (REAL_VALUE_TYPE *real_value, enum machine_mode mode)
/* Construct a CONST_FIXED from a bit payload and machine mode MODE.
The bits in PAYLOAD are used verbatim. */
The bits in PAYLOAD are sign-extended/zero-extended according to MODE. */
FIXED_VALUE_TYPE
fixed_from_double_int (double_int payload, enum machine_mode mode)
@ -92,7 +92,13 @@ fixed_from_double_int (double_int payload, enum machine_mode mode)
gcc_assert (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_DOUBLE_INT);
value.data = payload;
if (SIGNED_SCALAR_FIXED_POINT_MODE_P (mode))
value.data = payload.sext (1 + GET_MODE_IBIT (mode) + GET_MODE_FBIT (mode));
else if (UNSIGNED_SCALAR_FIXED_POINT_MODE_P (mode))
value.data = payload.zext (GET_MODE_IBIT (mode) + GET_MODE_FBIT (mode));
else
gcc_unreachable();
value.mode = mode;
return value;

4
gcc/fixed-value.h
View File

@ -50,12 +50,12 @@ extern FIXED_VALUE_TYPE fconst1[MAX_FCONST1];
extern rtx const_fixed_from_fixed_value (FIXED_VALUE_TYPE, enum machine_mode);
/* Construct a FIXED_VALUE from a bit payload and machine mode MODE.
The bits in PAYLOAD are used verbatim. */
The bits in PAYLOAD are sign-extended/zero-extended according to MODE. */
extern FIXED_VALUE_TYPE fixed_from_double_int (double_int,
enum machine_mode);
/* Return a CONST_FIXED from a bit payload and machine mode MODE.
The bits in PAYLOAD are used verbatim. */
The bits in PAYLOAD are sign-extended/zero-extended according to MODE. */
static inline rtx
const_fixed_from_double_int (double_int payload,
enum machine_mode mode)

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2013-02-08 Georg-Johann Lay <avr@gjlay.de>
PR tree-optimization/56064
* gcc.dg/fixed-point/view-convert-2.c: New test.
2013-02-08 Michael Matz <matz@suse.de>
PR tree-optimization/52448

139
gcc/testsuite/gcc.dg/fixed-point/view-convert-2.c Normal file
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@ -0,0 +1,139 @@
/* PR tree-optimization/56064 */
/* { dg-do run } */
/* { dg-options "-std=gnu99 -O2" } */
extern void abort (void);
extern void exit (int);
void test_k (void)
{
_Accum a;
__INT32_TYPE__ i = -__INT32_MAX__;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&a, &i, sizeof (a));
if (a >= 0k)
abort();
}
void test_0k (void)
{
_Accum a;
__INT32_TYPE__ i = 0;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&a, &i, sizeof (a));
if (a != 0k)
abort();
}
void test_hr (void)
{
short _Fract a;
__INT8_TYPE__ i = -__INT8_MAX__;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&a, &i, sizeof (a));
if (a >= 0hr)
abort();
}
void test_0hr (void)
{
short _Fract a;
__INT8_TYPE__ i = 0;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&a, &i, sizeof (a));
if (a != 0hr)
abort();
}
void test_si (void)
{
_Accum a = __ACCUM_MIN__;
__INT32_TYPE__ i;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&i, &a, sizeof (i));
if (i >= 0)
abort();
}
void test_0si (void)
{
_Accum a = 0;
__INT32_TYPE__ i;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&i, &a, sizeof (i));
if (i != 0)
abort();
}
void test_qi (void)
{
short _Fract a = __SFRACT_MIN__;
__INT8_TYPE__ i;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&i, &a, sizeof (i));
if (i >= 0)
abort();
}
void test_0qi (void)
{
short _Fract a = 0hr;
__INT8_TYPE__ i;
if (sizeof (a) != sizeof (i))
return;
__builtin_memcpy (&i, &a, sizeof (i));
if (i != 0)
abort();
}
int main (void)
{
test_hr();
test_k();
test_qi();
test_si();
test_0hr();
test_0k();
test_0qi();
test_0si();
exit (0);
return 0;
}