Like the pattern already there for `(x | y) & x`, this adds a simple pattern to optimize `(x | y) & (x & z)` to just `x & z`.
OK? Bootstrapped and tested on x86-64-linux-gnu with no regressions. gcc/ChangeLog: PR tree-optimization/103536 * match.pd (`(x | y) & (x & z)`, `(x & y) | (x | z)`): New patterns. gcc/testsuite/ChangeLog: PR tree-optimization/103536 * gcc.dg/tree-ssa/andor-6.c: New test. * gcc.dg/tree-ssa/andor-bool-1.c: New test. --- gcc/match.pd | 7 ++++++- gcc/testsuite/gcc.dg/tree-ssa/andor-6.c | 19 +++++++++++++++++++ gcc/testsuite/gcc.dg/tree-ssa/andor-bool-1.c | 13 +++++++++++++ 3 files changed, 38 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/andor-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/andor-bool-1.c diff --git a/gcc/match.pd b/gcc/match.pd index 3efc971f7f6..3495f9451d1 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -1990,7 +1990,12 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (with { bool wascmp; } (if (bitwise_inverted_equal_p (@0, @2, wascmp) && (!wascmp || element_precision (type) == 1)) - (bitop @0 @1))))) + (bitop @0 @1)))) + /* (x | y) & (x & z) -> (x & z) */ + /* (x & y) | (x | z) -> (x | z) */ + (simplify + (bitop:c (rbitop:c @0 @1) (bitop:c@3 @0 @2)) + @3)) /* ((x | y) & z) | x -> (z & y) | x ((x ^ y) & z) | x -> (z & y) | x */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/andor-6.c b/gcc/testsuite/gcc.dg/tree-ssa/andor-6.c new file mode 100644 index 00000000000..32e11730f98 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/andor-6.c @@ -0,0 +1,19 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-original" } */ +/* PR tree-optimization/103536 */ + +int +orand(int a, int b, int c) +{ + return (a | b) & (a & c); // a & c +} + +/* { dg-final { scan-tree-dump "return a \& c;" "original" } } */ + +int +andor(int d, int e, int f) +{ + return (d & e) | (d | f); // d | f +} + +/* { dg-final { scan-tree-dump "return d \\| f;" "original" } } */ diff --git a/gcc/testsuite/gcc.dg/tree-ssa/andor-bool-1.c b/gcc/testsuite/gcc.dg/tree-ssa/andor-bool-1.c new file mode 100644 index 00000000000..a1b974f3859 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/andor-bool-1.c @@ -0,0 +1,13 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ +/* PR tree-optimization/103536 */ + +_Bool +src_1 (_Bool a, _Bool b) +{ + return (a || b) && (a && b); +} + +/* { dg-final { scan-tree-dump "a_\[0-9\]+.D. \& b_\[0-9\]+.D." "optimized" } } */ +/* { dg-final { scan-tree-dump-not "a_\[0-9\]+.D. \\\| b_\[0-9\]+.D." "optimized" } } */ +/* { dg-final { scan-tree-dump-not "if " "optimized" } } */ -- 2.31.1