diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 6 |
2 files changed, 9 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5e9b207..bbe5479 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2013-09-11 Richard Sandiford <rdsandiford@googlemail.com> + + * simplify-rtx.c (simplify_unary_operation_1): Use simplify_gen_binary + for (not (neg ...)) and (neg (not ...)) cases. + 2013-09-11 Richard Biener <rguenther@suse.de> PR middle-end/58377 diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 9ec41a5..432842e 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -825,7 +825,8 @@ simplify_unary_operation_1 (enum rtx_code code, enum machine_mode mode, rtx op) /* Similarly, (not (neg X)) is (plus X -1). */ if (GET_CODE (op) == NEG) - return plus_constant (mode, XEXP (op, 0), -1); + return simplify_gen_binary (PLUS, mode, XEXP (op, 0), + CONSTM1_RTX (mode)); /* (not (xor X C)) for C constant is (xor X D) with D = ~C. */ if (GET_CODE (op) == XOR @@ -932,7 +933,8 @@ simplify_unary_operation_1 (enum rtx_code code, enum machine_mode mode, rtx op) /* Similarly, (neg (not X)) is (plus X 1). */ if (GET_CODE (op) == NOT) - return plus_constant (mode, XEXP (op, 0), 1); + return simplify_gen_binary (PLUS, mode, XEXP (op, 0), + CONST1_RTX (mode)); /* (neg (minus X Y)) can become (minus Y X). This transformation isn't safe for modes with signed zeros, since if X and Y are |