Sorry for doing the same mistake twice. Is this OK, and do
I need to test it again after the first version of this
patch?
2018-09-15 MCC CS <deswurstes@users.noreply.github.com>
gcc/
PR tree-optimization/87261
* match.pd: Add boolean optimizations,
fix whitespace.
2018-09-15 MCC CS <deswurstes@users.noreply.github.com>
gcc/testsuite/
PR tree-optimization/87261
* gcc.dg/pr87261.c: New test.
Index: gcc/match.pd
===================================================================
--- gcc/match.pd (revision 264170)
+++ gcc/match.pd (working copy)
@@ -92,7 +92,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
IFN_FMA IFN_FMS IFN_FNMA IFN_FNMS)
(define_operator_list COND_TERNARY
IFN_COND_FMA IFN_COND_FMS IFN_COND_FNMA IFN_COND_FNMS)
-
+
/* As opposed to convert?, this still creates a single pattern, so
it is not a suitable replacement for convert? in all cases. */
(match (nop_convert @0)
@@ -106,7 +106,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
&& tree_nop_conversion_p (TREE_TYPE (type), TREE_TYPE (TREE_TYPE (@0))))))
/* This one has to be last, or it shadows the others. */
(match (nop_convert @0)
- @0)
+ @0)
/* Transform likes of (char) ABS_EXPR <(int) x> into (char) ABSU_EXPR <x>
ABSU_EXPR returns unsigned absolute value of the operand and the operand
@@ -285,7 +285,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
And not for _Fract types where we can't build 1. */
(if (!integer_zerop (@0) && !ALL_FRACT_MODE_P (TYPE_MODE (type)))
{ build_one_cst (type); }))
- /* X / abs (X) is X < 0 ? -1 : 1. */
+ /* X / abs (X) is X < 0 ? -1 : 1. */
(simplify
(div:C @0 (abs @0))
(if (INTEGRAL_TYPE_P (type)
@@ -921,6 +921,31 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(bitop:c @0 (bit_not (bitop:cs @0 @1)))
(bitop @0 (bit_not @1))))
+/* (~x & y) | ~(x | y) -> ~x */
+(simplify
+ (bit_ior:c (bit_and:c (bit_not@2 @0) @1) (bit_not (bit_ior:c @0 @1)))
+ @2)
+
+/* (x | y) ^ (x | ~y) -> ~x */
+(simplify
+ (bit_xor:c (bit_ior:c @0 @1) (bit_ior:c @0 (bit_not @1)))
+ (bit_not @0))
+
+/* (x & y) | ~(x | y) -> ~(x ^ y) */
+(simplify
+ (bit_ior:c (bit_and @0 @1) (bit_not:s (bit_ior:s @0 @1)))