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simplify-rtx.c (simplify_binary_operation_1): Optimize shuffle of a concatenation.

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2012-08-17  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* simplify-rtx.c (simplify_binary_operation_1): Optimize shuffle of
	a concatenation.

gcc/testsuite/
	* gcc.target/i386/perm-concat.c: New test.

From-SVN: r190490
This commit is contained in:
Marc Glisse 2012-08-17 19:53:57 +02:00 committed by Marc Glisse
parent d9886a9e04
commit fd9da2c807
4 changed files with 40 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-08-17 Marc Glisse <marc.glisse@inria.fr>
* simplify-rtx.c (simplify_binary_operation_1): Optimize shuffle of
a concatenation.
2012-08-17 H.J. Lu <hongjiu.lu@intel.com>
* stor-layout.c (compute_record_mode): Replace

17
gcc/simplify-rtx.c
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@ -3253,6 +3253,23 @@ simplify_binary_operation_1 (enum rtx_code code, enum machine_mode mode,
subop0 = XEXP (XEXP (trueop0, i0 / 2), i0 % 2);
subop1 = XEXP (XEXP (trueop0, i1 / 2), i1 % 2);
return simplify_gen_binary (VEC_CONCAT, mode, subop0, subop1);
}
if (XVECLEN (trueop1, 0) == 2
&& CONST_INT_P (XVECEXP (trueop1, 0, 0))
&& CONST_INT_P (XVECEXP (trueop1, 0, 1))
&& GET_CODE (trueop0) == VEC_CONCAT
&& GET_MODE (trueop0) == mode)
{
unsigned int i0 = INTVAL (XVECEXP (trueop1, 0, 0));
unsigned int i1 = INTVAL (XVECEXP (trueop1, 0, 1));
rtx subop0, subop1;
gcc_assert (i0 < 2 && i1 < 2);
subop0 = XEXP (trueop0, i0);
subop1 = XEXP (trueop0, i1);
return simplify_gen_binary (VEC_CONCAT, mode, subop0, subop1);
}
}

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2012-08-17 Marc Glisse <marc.glisse@inria.fr>
* gcc.target/i386/perm-concat.c: New test.
2012-08-17 Julian Brown <julian@codesourcery.com>
* gcc.target/arm/div64-unwinding.c: New test.

13
gcc/testsuite/gcc.target/i386/perm-concat.c Normal file
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@ -0,0 +1,13 @@
/* { dg-do compile } */
/* { dg-options "-O -mavx -mfpmath=sse" } */
typedef double v2df __attribute__ ((__vector_size__ (16)));
v2df
f (double d)
{
v2df x = {-d, d};
return __builtin_ia32_vpermilpd (x, 1);
}
/* { dg-final { scan-assembler-not "\tvpermilpd\[ \t\]" } } */