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* sched-deps.c (sched_analyze): Check HARD_REGNO_CALL_PART_CLOBBERED.

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From-SVN: r59300
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Richard Sandiford 2002-11-20 10:03:36 +00:00 committed by Richard Sandiford
parent 4392ebd361
commit 5720520fc7
4 changed files with 40 additions and 2 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2002-11-20 Richard Sandiford <rsandifo@redhat.com>
* sched-deps.c (sched_analyze): Check HARD_REGNO_CALL_PART_CLOBBERED.
2002-11-20 Richard Sandiford <rsandifo@redhat.com>
* config/sh/sh.md (udivsi3): Don't put udivsi3_i4_media instructions

8
gcc/sched-deps.c
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@ -1287,8 +1287,12 @@ sched_analyze (deps, head, tail)
SET_REGNO_REG_SET (reg_pending_sets, i);
SET_REGNO_REG_SET (reg_pending_uses, i);
}
/* Other call-clobbered hard regs may be clobbered. */
else if (TEST_HARD_REG_BIT (regs_invalidated_by_call, i))
/* Other call-clobbered hard regs may be clobbered.
Since we only have a choice between 'might be clobbered'
and 'definitely not clobbered', we must include all
partly call-clobbered registers here. */
else if (HARD_REGNO_CALL_PART_CLOBBERED (i, reg_raw_mode[i])
|| TEST_HARD_REG_BIT (regs_invalidated_by_call, i))
SET_REGNO_REG_SET (reg_pending_clobbers, i);
/* We don't know what set of fixed registers might be used
by the function, but it is certain that the stack pointer

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2002-11-20 Richard Sandiford <rsandifo@redhat.com>
* gcc.c-torture/execute/20021120-3.c: New test.
2002-11-20 Richard Sandiford <rsandifo@redhat.com>
* gcc.c-torture/execute/20021120-2.c: New test.

26
gcc/testsuite/gcc.c-torture/execute/20021120-3.c Normal file
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@ -0,0 +1,26 @@
/* Test whether a partly call-clobbered register will be moved over a call.
Although the original test case didn't use any GNUisms, it proved
difficult to reduce without the named register extension. */
#if __SH64__ == 32
#define LOC asm ("r10")
#else
#define LOC
#endif
unsigned int foo (char *c, unsigned int x, unsigned int y)
{
register unsigned int z LOC;
sprintf (c, "%d", x / y);
z = x + 1;
return z / (y + 1);
}
int main ()
{
char c[16];
if (foo (c, ~1U, 4) != (~0U / 5))
abort ();
exit (0);
}