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From-SVN: r584
This commit is contained in:
Richard Stallman 1992-03-24 22:20:30 +00:00
parent 9ae57db830
commit 538b78e7ec
1 changed files with 11 additions and 4 deletions
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15
gcc/cse.c
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@ -605,6 +605,12 @@ rtx_cost (x)
/* Used in loop.c and combine.c as a marker. */
total = 0;
break;
case ASM_OPERANDS:
/* We don't want these to be used in substitutions because
we have no way of validating the resulting insn. So assign
anything containing an ASM_OPERANDS a very high cost. */
total = 1000;
break;
default:
total = 2;
}
@ -1528,7 +1534,7 @@ rehash_using_reg (x)
{
next = p->next_same_hash;
if (GET_CODE (p->exp) != REG && reg_mentioned_p (x, p->exp)
&& exp_equiv_p (p->exp, p->exp, 1)
&& exp_equiv_p (p->exp, p->exp, 1, 0)
&& i != (hash = safe_hash (p->exp, p->mode) % NBUCKETS))
{
if (p->next_same_hash)
@ -3650,11 +3656,11 @@ simplify_binary_operation (code, mode, op0, op1)
switch (code)
{
case PLUS:
val = arg0 + arg1;
val = arg0s + arg1s;
break;
case MINUS:
val = arg0 - arg1;
val = arg0s - arg1s;
break;
case MULT:
@ -5956,7 +5962,8 @@ cse_insn (insn, in_libcall_block)
/* We might have two BARRIERs separated by notes. Delete the second
one if so. */
if (p != insn && GET_CODE (NEXT_INSN (p)) == BARRIER)
if (p != insn && NEXT_INSN (p) != 0
&& GET_CODE (NEXT_INSN (p)) == BARRIER)
delete_insn (NEXT_INSN (p));
cse_jumps_altered = 1;