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Avoid making shared rtl.

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From-SVN: r30910
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Bernd Schmidt 1999-12-14 10:23:02 +00:00 committed by Bernd Schmidt
parent 956568cd6b
commit 3749f4ca8e
2 changed files with 18 additions and 7 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
1999-12-14 Bernd Schmidt <bernds@cygnus.co.uk>
* combine.c (combine_simplify_rtx): Don't make shared rtl.
(simplify_logical): Likewise.
1999-12-14 Mumit Khan <khan@xraylith.wisc.edu>
* cccp.c (INO_T_EQ): Disable inode-based optimization for Cygwin.

20
gcc/combine.c
View File

@ -4190,7 +4190,8 @@ combine_simplify_rtx (x, op0_mode, last, in_dest)
gen_binary (MULT, mode,
XEXP (XEXP (x, 0), 0), XEXP (x, 1)),
gen_binary (MULT, mode,
XEXP (XEXP (x, 0), 1), XEXP (x, 1))));
XEXP (XEXP (x, 0), 1),
copy_rtx (XEXP (x, 1)))));
if (GET_CODE (x) != MULT)
return x;
@ -5199,7 +5200,8 @@ simplify_logical (x, last)
x = apply_distributive_law
(gen_binary (GET_CODE (op0), mode,
gen_binary (AND, mode, XEXP (op0, 0), op1),
gen_binary (AND, mode, XEXP (op0, 1), op1)));
gen_binary (AND, mode, XEXP (op0, 1),
copy_rtx (op1))));
if (GET_CODE (x) != AND)
return x;
}
@ -5208,7 +5210,8 @@ simplify_logical (x, last)
return apply_distributive_law
(gen_binary (GET_CODE (op1), mode,
gen_binary (AND, mode, XEXP (op1, 0), op0),
gen_binary (AND, mode, XEXP (op1, 1), op0)));
gen_binary (AND, mode, XEXP (op1, 1),
copy_rtx (op0))));
/* Similarly, taking advantage of the fact that
(and (not A) (xor B C)) == (xor (ior A B) (ior A C)) */
@ -5217,13 +5220,14 @@ simplify_logical (x, last)
return apply_distributive_law
(gen_binary (XOR, mode,
gen_binary (IOR, mode, XEXP (op0, 0), XEXP (op1, 0)),
gen_binary (IOR, mode, XEXP (op0, 0), XEXP (op1, 1))));
gen_binary (IOR, mode, copy_rtx (XEXP (op0, 0)),
XEXP (op1, 1))));
else if (GET_CODE (op1) == NOT && GET_CODE (op0) == XOR)
return apply_distributive_law
(gen_binary (XOR, mode,
gen_binary (IOR, mode, XEXP (op1, 0), XEXP (op0, 0)),
gen_binary (IOR, mode, XEXP (op1, 0), XEXP (op0, 1))));
gen_binary (IOR, mode, copy_rtx (XEXP (op1, 0)), XEXP (op0, 1))));
break;
case IOR:
@ -5249,7 +5253,8 @@ simplify_logical (x, last)
x = apply_distributive_law
(gen_binary (AND, mode,
gen_binary (IOR, mode, XEXP (op0, 0), op1),
gen_binary (IOR, mode, XEXP (op0, 1), op1)));
gen_binary (IOR, mode, XEXP (op0, 1),
copy_rtx (op1))));
if (GET_CODE (x) != IOR)
return x;
@ -5260,7 +5265,8 @@ simplify_logical (x, last)
x = apply_distributive_law
(gen_binary (AND, mode,
gen_binary (IOR, mode, XEXP (op1, 0), op0),
gen_binary (IOR, mode, XEXP (op1, 1), op0)));
gen_binary (IOR, mode, XEXP (op1, 1),
copy_rtx (op0))));
if (GET_CODE (x) != IOR)
return x;