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(cse_insn): Reset the INSN_CODE for conditional 

or computed jumps which have been converted into simplejumps.

From-SVN: r4287
This commit is contained in:
Richard Stallman 1993-04-30 16:04:40 +00:00
parent d096c37276
commit 31dcf83f63
1 changed files with 18 additions and 3 deletions
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21
gcc/cse.c
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@ -3598,7 +3598,8 @@ simplify_binary_operation (code, mode, op0, op1)
/* A | (~A) -> -1 */
if (((GET_CODE (op0) == NOT && rtx_equal_p (XEXP (op0, 0), op1))
|| (GET_CODE (op1) == NOT && rtx_equal_p (XEXP (op1, 0), op0)))
&& ! side_effects_p (op0))
&& ! side_effects_p (op0)
&& mode == CCmode)
return constm1_rtx;
break;
@ -3608,7 +3609,8 @@ simplify_binary_operation (code, mode, op0, op1)
if (GET_CODE (op1) == CONST_INT
&& (INTVAL (op1) & GET_MODE_MASK (mode)) == GET_MODE_MASK (mode))
return gen_rtx (NOT, mode, op0);
if (op0 == op1 && ! side_effects_p (op0))
if (op0 == op1 && ! side_effects_p (op0)
&& mode == CCmode)
return const0_rtx;
break;
@ -3618,7 +3620,8 @@ simplify_binary_operation (code, mode, op0, op1)
if (GET_CODE (op1) == CONST_INT
&& (INTVAL (op1) & GET_MODE_MASK (mode)) == GET_MODE_MASK (mode))
return op0;
if (op0 == op1 && ! side_effects_p (op0))
if (op0 == op1 && ! side_effects_p (op0)
&& mode == CCmode)
return op0;
/* A & (~A) -> 0 */
if (((GET_CODE (op0) == NOT && rtx_equal_p (XEXP (op0, 0), op1))
@ -4159,6 +4162,11 @@ simplify_relational_operation (code, mode, op0, op1)
if (GET_CODE (op0) == COMPARE && op1 == const0_rtx)
op1 = XEXP (op0, 1), op0 = XEXP (op0, 0);
/* What to do with CCmode isn't clear yet.
Let's make sure nothing erroneous is done. */
if (GET_MODE (op0) == CCmode)
return 0;
/* Unlike the arithmetic operations, we can do the comparison whether
or not WIDTH is larger than HOST_BITS_PER_WIDE_INT because the
CONST_INTs are to be understood as being infinite precision as
@ -6595,6 +6603,13 @@ cse_insn (insn, in_libcall_block)
delete_insn (insn);
insn = new;
}
else
/* Otherwise, force rerecognition, since it probably had
a different pattern before.
This shouldn't really be necessary, since whatever
changed the source value above should have done this.
Until the right place is found, might as well do this here. */
INSN_CODE (insn) = -1;
/* Now that we've converted this jump to an unconditional jump,
there is dead code after it. Delete the dead code until we