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backport: re PR target/55981 (std::atomic store is split in two smaller stores) 

Backport from mainline
	2012-01-17  Uros Bizjak  <ubizjak@gmail.com>

	PR target/55981
	* config/i386/sync.md (atomic_store<mode>): Generate SWImode
	store through atomic_store<mode>_1.
	(atomic_store<mode>_1): Macroize insn using SWI mode iterator.

testsuite/ChangeLog:

	Backport from mainline
	2012-01-17  Uros Bizjak  <ubizjak@gmail.com>

	PR target/55981
	* gcc.target/pr55981.c: New test.

From-SVN: r195283
This commit is contained in:
Uros Bizjak 2013-01-17 23:51:00 +01:00 committed by Uros Bizjak
parent 238ee0875e
commit 851233aa68
4 changed files with 83 additions and 2 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2012-01-17 Uros Bizjak <ubizjak@gmail.com>
Backport from mainline
2012-01-17 Uros Bizjak <ubizjak@gmail.com>
PR target/55981
* config/i386/sync.md (atomic_store<mode>): Generate SWImode
store through atomic_store<mode>_1.
(atomic_store<mode>_1): Macroize insn using SWI mode iterator.
2013-01-16 Richard Biener <rguenther@suse.de>
PR middle-end/55882

13
gcc/config/i386/sync.md
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@ -223,8 +223,9 @@
DONE;
}
/* Otherwise use a normal store. */
emit_move_insn (operands[0], operands[1]);
/* Otherwise use a store. */
emit_insn (gen_atomic_store<mode>_1 (operands[0], operands[1],
operands[2]));
}
/* ... followed by an MFENCE, if required. */
if (model == MEMMODEL_SEQ_CST)
@ -232,6 +233,14 @@
DONE;
})
(define_insn "atomic_store<mode>_1"
[(set (match_operand:SWI 0 "memory_operand" "=m")
(unspec:SWI [(match_operand:SWI 1 "<nonmemory_operand>" "<r><i>")
(match_operand:SI 2 "const_int_operand")]
UNSPEC_MOVA))]
""
"mov{<imodesuffix>}\t{%1, %0|%0, %1}")
(define_insn_and_split "atomic_storedi_fpu"
[(set (match_operand:DI 0 "memory_operand" "=m,m,m")
(unspec:DI [(match_operand:DI 1 "register_operand" "x,m,?r")]

8
gcc/testsuite/ChangeLog
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@ -1,3 +1,11 @@
2012-01-17 Uros Bizjak <ubizjak@gmail.com>
Backport from mainline
2012-01-17 Uros Bizjak <ubizjak@gmail.com>
PR target/55981
* gcc.target/pr55981.c: New test.
2013-01-17 Janus Weil <janus@gcc.gnu.org>
PR fortran/55983

54
gcc/testsuite/gcc.target/pr55981.c Normal file
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@ -0,0 +1,54 @@
/* { dg-do compile { target { ! { ia32 } } } } */
/* { dg-options "-O2" } */
volatile int a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p;
volatile long long y;
void
test ()
{
int a_ = a;
int b_ = b;
int c_ = c;
int d_ = d;
int e_ = e;
int f_ = f;
int g_ = g;
int h_ = h;
int i_ = i;
int j_ = j;
int k_ = k;
int l_ = l;
int m_ = m;
int n_ = n;
int o_ = o;
int p_ = p;
int z;
for (z = 0; z < 1000; z++)
{
__atomic_store_n (&y, 0x100000002ll, __ATOMIC_SEQ_CST);
__atomic_store_n (&y, 0x300000004ll, __ATOMIC_SEQ_CST);
}
a = a_;
b = b_;
c = c_;
d = d_;
e = e_;
f = f_;
g = g_;
h = h_;
i = i_;
j = j_;
k = k_;
l = l_;
m = m_;
n = n_;
o = o_;
p = p_;
}
/* { dg-final { scan-assembler-times "movabs" 2 } } */