diff options
| author | amker <amker@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-10-27 14:59:04 +0000 |
|---|---|---|
| committer | amker <amker@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-10-27 14:59:04 +0000 |
| commit | 641ae1b81aab5bb902a382fbfc1695a7be2624e3 (patch) | |
| tree | d967b316fe6af130249a30a38dff681ae741f5f9 | |
| parent | 52cbeb376bc7420f99245a6d6c7891d6e366aa24 (diff) | |
| download | gcc-641ae1b81aab5bb902a382fbfc1695a7be2624e3.tar.gz | |
* match.pd ((convert (op:s (convert@2 @0) (convert?@3 @1)))): Add
support for constant operand for OP.
gcc/testsuite
* gcc.dg/fold-narrowbopcst-1.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@241624 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/match.pd | 14 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/fold-narrowbopcst-1.c | 14 |
4 files changed, 32 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9eea9a3b7a3..73d3004b7cd 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-10-27 Bin Cheng <bin.cheng@arm.com> + + * match.pd ((convert (op:s (convert@2 @0) (convert?@3 @1)))): Add + support for constant operand for OP. + 2016-10-27 Jakub Jelinek <jakub@redhat.com> * dwarf2out.c (gen_member_die): Only reparent_child instead of diff --git a/gcc/match.pd b/gcc/match.pd index 73bee34dcc5..48f73514a3f 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -3277,7 +3277,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) operation and convert the result to the desired type. */ (for op (plus minus) (simplify - (convert (op:s (convert@2 @0) (convert@3 @1))) + (convert (op:s (convert@2 @0) (convert?@3 @1))) (if (INTEGRAL_TYPE_P (type) /* We check for type compatibility between @0 and @1 below, so there's no need to check that @1/@3 are integral types. */ @@ -3293,12 +3293,16 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) && TYPE_PRECISION (type) == GET_MODE_PRECISION (TYPE_MODE (type)) /* The inner conversion must be a widening conversion. */ && TYPE_PRECISION (TREE_TYPE (@2)) > TYPE_PRECISION (TREE_TYPE (@0)) - && types_match (@0, @1) - && types_match (@0, type)) + && types_match (@0, type) + && (types_match (@0, @1) + /* Or the second operand is const integer or converted const + integer from valueize. */ + || TREE_CODE (@1) == INTEGER_CST)) (if (TYPE_OVERFLOW_WRAPS (TREE_TYPE (@0))) - (convert (op @0 @1)) + (op @0 (convert @1)) (with { tree utype = unsigned_type_for (TREE_TYPE (@0)); } - (convert (op (convert:utype @0) (convert:utype @1)))))))) + (convert (op (convert:utype @0) + (convert:utype @1)))))))) /* This is another case of narrowing, specifically when there's an outer BIT_AND_EXPR which masks off bits outside the type of the innermost diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 22a9ce83ac3..72f669cfcf7 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2016-10-27 Bin Cheng <bin.cheng@arm.com> + + * gcc.dg/fold-narrowbopcst-1.c: New test. + 2016-10-27 Fritz Reese <fritzoreese@gmail.com> * gfortran.dg/dec_io_5.f90: Don't use "test.txt", and use diff --git a/gcc/testsuite/gcc.dg/fold-narrowbopcst-1.c b/gcc/testsuite/gcc.dg/fold-narrowbopcst-1.c new file mode 100644 index 00000000000..8a33677c274 --- /dev/null +++ b/gcc/testsuite/gcc.dg/fold-narrowbopcst-1.c @@ -0,0 +1,14 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-optimized" } */ + +int foo1 (unsigned char a[], unsigned int x) +{ + unsigned int i; + for (i = 0; i < 1000; i++) + { + x = a[i]; + a[i] = (unsigned char)(x >= 100 ? x - 100 : 0); + } + return x; +} +/* { dg-final { scan-tree-dump " = _.* \\+ 156" "optimized" } } */ |