procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

simplify-rtx.c (simplify_unary_operation_1): Use simplify_gen_binary for (not (neg ...)) and (neg (not ...)) cases.

Browse source 
gcc/
	* simplify-rtx.c (simplify_unary_operation_1): Use simplify_gen_binary
	for (not (neg ...)) and (neg (not ...)) cases.

From-SVN: r202506
This commit is contained in:
Richard Sandiford 2013-09-11 17:40:56 +00:00 • committed by Richard Sandiford
parent 5c2961cf38
commit 088845a5f0
2 changed files with 9 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
gcc/ChangeLog
View file

@ -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

6
gcc/simplify-rtx.c
View file

@ -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