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[simplify-rtx] PR 65235: Calculate element size correctly when simplifying (vec_select (vec_concat (const_int) (...)) [...]) 

PR rtl-optimization 65235
	* simplify-rtx.c (simplify_binary_operation_1, VEC_SELECT case):
	When first element of vec_concat is const_int, calculate its size
	using second element.

	PR rtl-optimization 65235
	* gcc.target/aarch64/pr65235_1.c: New test.

From-SVN: r221387
This commit is contained in:
Kyrylo Tkachov 2015-03-12 13:40:50 +00:00 committed by Kyrylo Tkachov
parent 6899585abf
commit 644f6fd80a
4 changed files with 57 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2015-03-12 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR rtl-optimization 65235
* simplify-rtx.c (simplify_binary_operation_1, VEC_SELECT case):
When first element of vec_concat is const_int, calculate its size
using second element.
2015-03-12 Richard Biener <rguenther@suse.de>
PR middle-end/65270

16
gcc/simplify-rtx.c
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@ -3555,7 +3555,21 @@ simplify_binary_operation_1 (enum rtx_code code, machine_mode mode,
while (GET_MODE (vec) != mode
&& GET_CODE (vec) == VEC_CONCAT)
{
HOST_WIDE_INT vec_size = GET_MODE_SIZE (GET_MODE (XEXP (vec, 0)));
HOST_WIDE_INT vec_size;
if (CONST_INT_P (XEXP (vec, 0)))
{
/* vec_concat of two const_ints doesn't make sense with
respect to modes. */
if (CONST_INT_P (XEXP (vec, 1)))
return 0;
vec_size = GET_MODE_SIZE (GET_MODE (trueop0))
- GET_MODE_SIZE (GET_MODE (XEXP (vec, 1)));
}
else
vec_size = GET_MODE_SIZE (GET_MODE (XEXP (vec, 0)));
if (offset < vec_size)
vec = XEXP (vec, 0);
else

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2015-03-12 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR rtl-optimization 65235
* gcc.target/aarch64/pr65235_1.c: New test.
2015-03-12 Dominik Vogt <vogt@linux.vnet.ibm.com>
* gcc.target/s390/hotpatch-21.c: New test for hotpatch alignment.

30
gcc/testsuite/gcc.target/aarch64/pr65235_1.c Normal file
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@ -0,0 +1,30 @@
/* { dg-do run } */
/* { dg-options "-O2" } */
#include "arm_neon.h"
int
main (int argc, char** argv)
{
int64x1_t val1;
int64x1_t val2;
int64x1_t val3;
uint64x1_t val13;
uint64x2_t val14;
uint64_t got;
uint64_t exp;
val1 = vcreate_s64(UINT64_C(0xffffffff80008000));
val2 = vcreate_s64(UINT64_C(0x0000f38d00000000));
val3 = vcreate_s64(UINT64_C(0xffff7fff0000809b));
/* Expect: "val13" = 8000000000001553. */
val13 = vcreate_u64 (UINT64_C(0x8000000000001553));
/* Expect: "val14" = 0010 0000 0000 0002 0000 0000 0000 0000. */
val14 = vcombine_u64(vcgt_s64(vqrshl_s64(val1, val2),
vshr_n_s64(val3, 18)),
vshr_n_u64(val13, 11));
/* Should be 0000000000000000. */
got = vgetq_lane_u64(val14, 0);
exp = 0;
if(exp != got)
__builtin_abort ();
}