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(find_cross_jump): Don't allow old-style and volatile asms

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to match.

From-SVN: r13603
This commit is contained in:
Jim Wilson 1997-02-03 17:00:11 -08:00
parent b91b26c962
commit 44c389e479
1 changed files with 13 additions and 1 deletions
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14
gcc/jump.c
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@ -2605,7 +2605,19 @@ find_cross_jump (e1, e2, minimum, f1, f2)
}
#endif
if (lose || GET_CODE (p1) != GET_CODE (p2)
/* Don't allow old-style asm or volatile extended asms to be accepted
for cross jumping purposes. It is conceptually correct to allow
them, since cross-jumping preserves the dynamic instruction order
even though it is changing the static instruction order. However,
if an asm is being used to emit an assembler pseudo-op, such as
the MIPS `.set reorder' pseudo-op, then the static instruction order
matters and it must be preserved. */
if (GET_CODE (p1) == ASM_INPUT || GET_CODE (p2) == ASM_INPUT
|| (GET_CODE (p1) == ASM_OPERANDS && MEM_VOLATILE_P (p1))
|| (GET_CODE (p2) == ASM_OPERANDS && MEM_VOLATILE_P (p2)))
lose = 1;
if (lose || GET_CODE (p1) != GET_CODE (p2)
|| ! rtx_renumbered_equal_p (p1, p2))
{
/* The following code helps take care of G++ cleanups. */