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| author | Kamlesh Kumar <kamleshbhalui@gmail.com> | 2019-09-03 20:13:22 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2019-09-03 14:13:22 -0600 |
| commit | 52792faa0c8510b7bfc2c184c9f67d4a87f83215 (patch) | |
| tree | 3c5f5a01416ec909271f3aa44d5c8d2a1c7a462e /gcc | |
| parent | 42bf58bb137992b876be37f8b2e683c49bc2abed (diff) | |
| download | gcc-52792faa0c8510b7bfc2c184c9f67d4a87f83215.zip gcc-52792faa0c8510b7bfc2c184c9f67d4a87f83215.tar.gz gcc-52792faa0c8510b7bfc2c184c9f67d4a87f83215.tar.bz2 | |
re PR tree-optimization/91504 (Inlining misses some logical operation folding)
PR tree-optimization/91504
* match.pd: Add ((~a & b) ^a) --> (a | b).
PR tree-optimization/91504
gcc.dg/tree-ssa/pr91504.c: New test.
From-SVN: r275354
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/match.pd | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr91504.c | 18 |
4 files changed, 33 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6ac810f..abbbf16 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2019-09-03 Kamlesh Kumar <kamleshbhalui@gmail.com> + + PR tree-optimization/91504 + * match.pd: Add ((~a & b) ^a) --> (a | b). + 2019-09-03 Jakub Jelinek <jakub@redhat.com> PR target/91604 diff --git a/gcc/match.pd b/gcc/match.pd index cd75dac..1d13543 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -831,6 +831,11 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (bit_xor:c (bit_and:cs @0 (bit_not @1)) (bit_not @0)) (bit_not (bit_and @0 @1))) +/* (~a & b) ^ a --> (a | b) */ +(simplify + (bit_xor:c (bit_and:cs (bit_not @0) @1) @0) + (bit_ior @0 @1)) + /* (a | b) & ~(a ^ b) --> a & b */ (simplify (bit_and:c (bit_ior @0 @1) (bit_not (bit_xor:c @0 @1))) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 44c43d2..4cf3e9b 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2019-09-03 Kamlesh Kumar <kamleshbhalui@gmail.com> + + PR tree-optimization/91504 + gcc.dg/tree-ssa/pr91504.c: New test. + 2019-09-03 Jakub Jelinek <jakub@redhat.com> PR target/91604 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr91504.c b/gcc/testsuite/gcc.dg/tree-ssa/pr91504.c new file mode 100644 index 0000000..a52dea4 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr91504.c @@ -0,0 +1,18 @@ +/* { dg-do compile } */ +/* { dg-options "-O -fdump-tree-optimized-raw" } */ + +static inline unsigned deposit32(unsigned value, int start, int length, + unsigned fieldval) +{ + unsigned mask = (~0U >> (32 - length)) << start; + return (value & ~mask) | ((fieldval << start) & mask); +} + +unsigned foo(unsigned value) +{ + return deposit32(value, 10, 1, 1); +} + +/* { dg-final { scan-tree-dump-not "bit_and_expr" "optimized" } } */ +/* { dg-final { scan-tree-dump-not "bit_xor_expr" "optimized" } } */ +/* { dg-final { scan-tree-dump-not "bit_not_expr" "optimized" } } */ |