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re PR target/57264 (cld not emitted when string instructions used, and '-mcld' on command line) 

PR target/57264
	Backport from mainline
	2013-01-22  Jakub Jelinek  <jakub@redhat.com>

	PR target/55686
	* config/i386/i386.md (UNSPEC_STOS): New.
	(strset_singleop, *strsetdi_rex_1, *strsetsi_1, *strsethi_1,
	*strsetqi_1): Add UNSPEC_STOS.

testsuite/ChangeLog:

	PR target/57264
	* gcc.target/i386/pr57264.c: New test.

From-SVN: r198837
This commit is contained in:
Uros Bizjak 2013-05-13 19:14:26 +02:00 committed by Uros Bizjak
parent d7f48e4d08
commit ad02b21dea
4 changed files with 45 additions and 5 deletions
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11
gcc/ChangeLog
View File

@ -1,3 +1,14 @@
2013-05-13 Uros Bizjak <ubizjak@gmail.com>
PR target/57264
Backport from mainline
2013-01-22 Jakub Jelinek <jakub@redhat.com>
PR target/55686
* config/i386/i386.md (UNSPEC_STOS): New.
(strset_singleop, *strsetdi_rex_1, *strsetsi_1, *strsethi_1,
*strsetqi_1): Add UNSPEC_STOS.
2013-05-10 Joey Ye <joey.ye@arm.com>
Backport from mainline

16
gcc/config/i386/i386.md
View File

@ -109,6 +109,7 @@
UNSPEC_CALL_NEEDS_VZEROUPPER
UNSPEC_PAUSE
UNSPEC_LEA_ADDR
UNSPEC_STOS
;; For SSE/MMX support:
UNSPEC_FIX_NOTRUNC
@ -15912,7 +15913,8 @@
[(parallel [(set (match_operand 1 "memory_operand" "")
(match_operand 2 "register_operand" ""))
(set (match_operand 0 "register_operand" "")
(match_operand 3 "" ""))])]
(match_operand 3 "" ""))
(unspec [(const_int 0)] UNSPEC_STOS)])]
""
"ix86_current_function_needs_cld = 1;")
@ -15921,7 +15923,8 @@
(match_operand:DI 2 "register_operand" "a"))
(set (match_operand:DI 0 "register_operand" "=D")
(plus:DI (match_dup 1)
(const_int 8)))]
(const_int 8)))
(unspec [(const_int 0)] UNSPEC_STOS)]
"TARGET_64BIT
&& !(fixed_regs[AX_REG] || fixed_regs[DI_REG])"
"stosq"
@ -15934,7 +15937,8 @@
(match_operand:SI 2 "register_operand" "a"))
(set (match_operand:P 0 "register_operand" "=D")
(plus:P (match_dup 1)
(const_int 4)))]
(const_int 4)))
(unspec [(const_int 0)] UNSPEC_STOS)]
"!(fixed_regs[AX_REG] || fixed_regs[DI_REG])"
"stos{l|d}"
[(set_attr "type" "str")
@ -15946,7 +15950,8 @@
(match_operand:HI 2 "register_operand" "a"))
(set (match_operand:P 0 "register_operand" "=D")
(plus:P (match_dup 1)
(const_int 2)))]
(const_int 2)))
(unspec [(const_int 0)] UNSPEC_STOS)]
"!(fixed_regs[AX_REG] || fixed_regs[DI_REG])"
"stosw"
[(set_attr "type" "str")
@ -15958,7 +15963,8 @@
(match_operand:QI 2 "register_operand" "a"))
(set (match_operand:P 0 "register_operand" "=D")
(plus:P (match_dup 1)
(const_int 1)))]
(const_int 1)))
(unspec [(const_int 0)] UNSPEC_STOS)]
"!(fixed_regs[AX_REG] || fixed_regs[DI_REG])"
"stosb"
[(set_attr "type" "str")

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2013-05-13 Uros Bizjak <ubizjak@gmail.com>
PR target/57264
* gcc.target/i386/pr57264.c: New test.
2013-05-07 Michael Meissner <meissner@linux.vnet.ibm.com>
Backport from trunk

18
gcc/testsuite/gcc.target/i386/pr57264.c Normal file
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@ -0,0 +1,18 @@
/* { dg-do compile } */
/* { dg-options "-O1 -mcld" } */
void test (int x, int **pp)
{
while (x)
{
int *ip = *pp;
int *op = *pp;
while (*ip)
{
int v = *ip++;
*op++ = v + 1;
}
}
}
/* { dg-final { scan-assembler-not "stosl" } } */