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

simplify-rtx.c (simplify_binary_operation_1): Detect the identity. 

2012-10-01  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* simplify-rtx.c (simplify_binary_operation_1) <VEC_SELECT>:
	Detect the identity.
	<VEC_CONCAT>: Handle VEC_SELECTs from the same vector.

gcc/testsuite/
	* gcc.target/i386/vect-rebuild.c: New testcase.

From-SVN: r191909
This commit is contained in:
Marc Glisse 2012-10-01 11:53:26 +02:00 committed by Marc Glisse
parent 3c321286b4
commit 5f6e1c559b
4 changed files with 78 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2012-10-01 Marc Glisse <marc.glisse@inria.fr>
* simplify-rtx.c (simplify_binary_operation_1) <VEC_SELECT>:
Detect the identity.
<VEC_CONCAT>: Handle VEC_SELECTs from the same vector.
2012-10-01 Oleg Endo <olegendo@gcc.gnu.org>
PR target/50457

35
gcc/simplify-rtx.c
View File

@ -3246,6 +3246,23 @@ simplify_binary_operation_1 (enum rtx_code code, enum machine_mode mode,
return gen_rtx_CONST_VECTOR (mode, v);
}
/* Recognize the identity. */
if (GET_MODE (trueop0) == mode)
{
bool maybe_ident = true;
for (int i = 0; i < XVECLEN (trueop1, 0); i++)
{
rtx j = XVECEXP (trueop1, 0, i);
if (!CONST_INT_P (j) || INTVAL (j) != i)
{
maybe_ident = false;
break;
}
}
if (maybe_ident)
return trueop0;
}
/* If we build {a,b} then permute it, build the result directly. */
if (XVECLEN (trueop1, 0) == 2
&& CONST_INT_P (XVECEXP (trueop1, 0, 0))
@ -3371,6 +3388,24 @@ simplify_binary_operation_1 (enum rtx_code code, enum machine_mode mode,
return gen_rtx_CONST_VECTOR (mode, v);
}
/* Try to merge VEC_SELECTs from the same vector into a single one. */
if (GET_CODE (trueop0) == VEC_SELECT
&& GET_CODE (trueop1) == VEC_SELECT
&& rtx_equal_p (XEXP (trueop0, 0), XEXP (trueop1, 0)))
{
rtx par0 = XEXP (trueop0, 1);
rtx par1 = XEXP (trueop1, 1);
int len0 = XVECLEN (par0, 0);
int len1 = XVECLEN (par1, 0);
rtvec vec = rtvec_alloc (len0 + len1);
for (int i = 0; i < len0; i++)
RTVEC_ELT (vec, i) = XVECEXP (par0, 0, i);
for (int i = 0; i < len1; i++)
RTVEC_ELT (vec, len0 + i) = XVECEXP (par1, 0, i);
return simplify_gen_binary (VEC_SELECT, mode, XEXP (trueop0, 0),
gen_rtx_PARALLEL (VOIDmode, vec));
}
}
return 0;

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2012-10-01 Marc Glisse <marc.glisse@inria.fr>
* gcc.target/i386/vect-rebuild.c: New testcase.
2012-09-30 Uros Bizjak <ubizjak@gmail.com>
* gcc.target/i386/pad-10.c (foo2): Return x - z.

33
gcc/testsuite/gcc.target/i386/vect-rebuild.c Normal file
View File

@ -0,0 +1,33 @@
/* { dg-do compile } */
/* { dg-options "-O -mavx -fno-tree-forwprop" } */
typedef double v2df __attribute__ ((__vector_size__ (16)));
typedef double v4df __attribute__ ((__vector_size__ (32)));
v2df f1 (v2df x)
{
v2df xx = { x[0], x[1] };
return xx;
}
v4df f2 (v4df x)
{
v4df xx = { x[0], x[1], x[2], x[3] };
return xx;
}
v2df g (v2df x)
{
v2df xx = { x[1], x[0] };
return xx;
}
v2df h (v4df x)
{
v2df xx = { x[2], x[3] };
return xx;
}
/* { dg-final { scan-assembler-not "unpck" } } */
/* { dg-final { scan-assembler-times "\tv?permilpd\[ \t\]" 1 } } */
/* { dg-final { scan-assembler-times "\tv?extractf128\[ \t\]" 1 } } */