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mips.c (vr4130_align_insns): Don't simulate ghost instructions.

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gcc/
	* config/mips/mips.c (vr4130_align_insns): Don't simulate
	ghost instructions.  Assert that the required instructions exist.

From-SVN: r190716
This commit is contained in:
Richard Sandiford 2012-08-27 16:25:12 +00:00 committed by Richard Sandiford
parent f3d25c6570
commit d8c5157261
2 changed files with 9 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-08-27 Richard Sandiford <rdsandiford@googlemail.com>
* config/mips/mips.c (vr4130_align_insns): Don't simulate
ghost instructions. Assert that the required instructions exist.
2012-08-26 Richard Sandiford <rdsandiford@googlemail.com>
* config/mips/mips.h (AVOID_CCMODE_COPIES): Update rationale for

5
gcc/config/mips/mips.c
View File

@ -15145,7 +15145,8 @@ vr4130_align_insns (void)
the fly to avoid a separate instruction walk. */
vr4130_avoid_branch_rt_conflict (insn);
if (USEFUL_INSN_P (insn))
length = get_attr_length (insn);
if (length > 0 && USEFUL_INSN_P (insn))
FOR_EACH_SUBINSN (subinsn, insn)
{
mips_sim_wait_insn (&state, subinsn);
@ -15180,6 +15181,7 @@ vr4130_align_insns (void)
issuing at the same time as the branch. We therefore
insert a nop before the branch in order to align its
delay slot. */
gcc_assert (last2);
emit_insn_after (gen_nop (), last2);
aligned_p = false;
}
@ -15188,6 +15190,7 @@ vr4130_align_insns (void)
/* SUBINSN is the delay slot of INSN, but INSN is
currently unaligned. Insert a nop between
LAST and INSN to align it. */
gcc_assert (last);
emit_insn_after (gen_nop (), last);
aligned_p = true;
}