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backport: re PR target/54436 (Compiling some regular C++ code gives assembler '700415 shortened to 255' warning) 

Backported from mainline
	2012-09-01  Jakub Jelinek  <jakub@redhat.com>

	PR target/54436
	* config/i386/i386.md (*mov<mode>_insv_1_rex64, *movsi_insv_1): If
	operands[1] is CONST_INT_P, convert it to QImode before printing.

	* gcc.dg/torture/pr54436.c: New test.

From-SVN: r190900
This commit is contained in:
Jakub Jelinek 2012-09-03 18:05:44 +02:00 committed by Jakub Jelinek
parent d9d49771cb
commit aaa806324f
4 changed files with 59 additions and 2 deletions
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6
gcc/ChangeLog
View File

@ -1,6 +1,12 @@
2012-09-03 Jakub Jelinek <jakub@redhat.com>
Backported from mainline
2012-09-01 Jakub Jelinek <jakub@redhat.com>
PR target/54436
* config/i386/i386.md (*mov<mode>_insv_1_rex64, *movsi_insv_1): If
operands[1] is CONST_INT_P, convert it to QImode before printing.
2012-08-31 Jakub Jelinek <jakub@redhat.com>
PR c/54428

12
gcc/config/i386/i386.md
View File

@ -2600,7 +2600,11 @@
(const_int 8))
(match_operand:SWI48x 1 "nonmemory_operand" "Qn"))]
"TARGET_64BIT"
"mov{b}\t{%b1, %h0|%h0, %b1}"
{
if (CONST_INT_P (operands[1]))
operands[1] = simplify_gen_subreg (QImode, operands[1], <MODE>mode, 0);
return "mov{b}\t{%b1, %h0|%h0, %b1}";
}
[(set_attr "type" "imov")
(set_attr "mode" "QI")])
@ -2610,7 +2614,11 @@
(const_int 8))
(match_operand:SI 1 "general_operand" "Qmn"))]
"!TARGET_64BIT"
"mov{b}\t{%b1, %h0|%h0, %b1}"
{
if (CONST_INT_P (operands[1]))
operands[1] = simplify_gen_subreg (QImode, operands[1], SImode, 0);
return "mov{b}\t{%b1, %h0|%h0, %b1}";
}
[(set_attr "type" "imov")
(set_attr "mode" "QI")])

5
gcc/testsuite/ChangeLog
View File

@ -1,6 +1,11 @@
2012-09-03 Jakub Jelinek <jakub@redhat.com>
Backported from mainline
2012-09-01 Jakub Jelinek <jakub@redhat.com>
PR target/54436
* gcc.dg/torture/pr54436.c: New test.
2012-08-31 Jakub Jelinek <jakub@redhat.com>
PR c/54428

38
gcc/testsuite/gcc.dg/torture/pr54436.c Normal file
View File

@ -0,0 +1,38 @@
/* PR target/54436 */
/* { dg-do assemble } */
#if __SIZEOF_SHORT__ == 2 && __SIZEOF_LONG_LONG__ == 8
static inline unsigned short
baz (unsigned short *x)
{
union U { unsigned short a; unsigned char b[2]; } u = { *x };
u.b[0] = ((u.b[0] * 0x0802ULL & 0x22110ULL)
| (u.b[0] * 0x8020ULL & 0x88440ULL)) * 0x10101ULL >> 16;
u.b[1] = ((u.b[1] * 0x0802ULL & 0x22110ULL)
| (u.b[1] * 0x8020ULL & 0x88440ULL)) * 0x10101ULL >> 16;
unsigned char t = u.b[0];
u.b[0] = u.b[1];
u.b[1] = t;
return u.a;
}
static inline unsigned long long
bar (unsigned long long *x)
{
union U { unsigned long long a; unsigned short b[4]; } u = { *x };
u.b[0] = baz (&u.b[0]);
return u.a;
}
void
foo (void)
{
unsigned long long l = -1ULL;
__asm volatile ("" : : "r" (bar (&l)));
}
#else
void
foo (void)
{
}
#endif