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rs6000.c (v2df_reduction_p): New function. 

[gcc]

2016-01-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (v2df_reduction_p): New function.
	(rtx_is_swappable_p): Reductions are swappable.
	(insn_is_swappable_p): V2DF reductions are swappable.

[gcc/testsuite]

2016-01-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* gcc.target/powerpc/swaps-p8-23.c: New test.
	* gcc.target/powerpc/swaps-p8-24.c: Likewise.

From-SVN: r232257
This commit is contained in:
Bill Schmidt 2016-01-12 04:49:55 +00:00 committed by William Schmidt
parent feb20787df
commit 3574cf47fa
5 changed files with 115 additions and 0 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2016-01-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (v2df_reduction_p): New function.
(rtx_is_swappable_p): Reductions are swappable.
(insn_is_swappable_p): V2DF reductions are swappable.
2016-01-11 John David Anglin <danglin@gcc.gnu.org>
* config/pa/pa.c (pa_emit_move_sequence): Handle floating point

52
gcc/config/rs6000/rs6000.c
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@ -36648,6 +36648,44 @@ const_load_sequence_p (swap_web_entry *insn_entry, rtx insn)
return true;
}
/* Return TRUE iff OP matches a V2DF reduction pattern. See the
definition of vsx_reduc_<VEC_reduc_name>_v2df in vsx.md. */
static bool
v2df_reduction_p (rtx op)
{
if (GET_MODE (op) != V2DFmode)
return false;
enum rtx_code code = GET_CODE (op);
if (code != PLUS && code != SMIN && code != SMAX)
return false;
rtx concat = XEXP (op, 0);
if (GET_CODE (concat) != VEC_CONCAT)
return false;
rtx select0 = XEXP (concat, 0);
rtx select1 = XEXP (concat, 1);
if (GET_CODE (select0) != VEC_SELECT || GET_CODE (select1) != VEC_SELECT)
return false;
rtx reg0 = XEXP (select0, 0);
rtx reg1 = XEXP (select1, 0);
if (!rtx_equal_p (reg0, reg1) || !REG_P (reg0))
return false;
rtx parallel0 = XEXP (select0, 1);
rtx parallel1 = XEXP (select1, 1);
if (GET_CODE (parallel0) != PARALLEL || GET_CODE (parallel1) != PARALLEL)
return false;
if (!rtx_equal_p (XVECEXP (parallel0, 0, 0), const1_rtx)
|| !rtx_equal_p (XVECEXP (parallel1, 0, 0), const0_rtx))
return false;
return true;
}
/* Return 1 iff OP is an operand that will not be affected by having
vector doublewords swapped in memory. */
static unsigned int
@ -36719,6 +36757,8 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
*special = SH_XXPERMDI;
return 1;
}
else if (v2df_reduction_p (op))
return 1;
else
return 0;
@ -36783,6 +36823,9 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
case UNSPEC_VSPLT_DIRECT:
*special = SH_SPLAT;
return 1;
case UNSPEC_REDUC_PLUS:
case UNSPEC_REDUC:
return 1;
}
}
@ -36907,6 +36950,15 @@ insn_is_swappable_p (swap_web_entry *insn_entry, rtx insn,
return 1;
}
/* V2DF reductions are always swappable. */
if (GET_CODE (body) == PARALLEL)
{
rtx expr = XVECEXP (body, 0, 0);
if (GET_CODE (expr) == SET
&& v2df_reduction_p (SET_SRC (expr)))
return 1;
}
/* An UNSPEC_VPERM is ok if the mask operand is loaded from the
constant pool. */
if (GET_CODE (body) == SET

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-01-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* gcc.target/powerpc/swaps-p8-23.c: New test.
* gcc.target/powerpc/swaps-p8-24.c: Likewise.
2016-01-11 John David Anglin <danglin@gcc.gnu.org>
PR tree-optimization/68356

26
gcc/testsuite/gcc.target/powerpc/swaps-p8-23.c Normal file
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@ -0,0 +1,26 @@
/* { dg-do compile { target { powerpc64le-*-* } } } */
/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
/* { dg-options "-mcpu=power8 -O3 -ffast-math" } */
/* { dg-final { scan-assembler "lxvd2x" } } */
/* { dg-final { scan-assembler-not "xxpermdi" } } */
/* Verify that swap optimization works correctly in the presence of
a V2DFmode reduction. */
extern double optvalue;
extern void obfuscate (double, unsigned int);
void
foo (double *x, double *y, unsigned int n, unsigned int m)
{
unsigned int i, j;
double sacc;
for (j = 0; j < m; ++j)
{
sacc = 0.0;
for (i = 0; i < n; ++i)
sacc += x[i] * y[i];
obfuscate (sacc, n);
}
optvalue = n * 2.0 * m;
}

26
gcc/testsuite/gcc.target/powerpc/swaps-p8-24.c Normal file
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@ -0,0 +1,26 @@
/* { dg-do compile { target { powerpc64le-*-* } } } */
/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
/* { dg-options "-mcpu=power8 -O3 -ffast-math" } */
/* { dg-final { scan-assembler "lxvd2x" } } */
/* { dg-final { scan-assembler-not "xxpermdi" } } */
/* Verify that swap optimization works correctly in the presence of
a V4SFmode reduction. */
extern double optvalue;
extern void obfuscate (float, unsigned int);
void
foo (float *x, float *y, unsigned int n, unsigned int m)
{
unsigned int i, j;
float sacc;
for (j = 0; j < m; ++j)
{
sacc = 0.0f;
for (i = 0; i < n; ++i)
sacc += x[i] * y[i];
obfuscate (sacc, n);
}
optvalue = n * 2.0f * m;
}