diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-15 09:31:28 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-15 09:31:28 +0000 |
| commit | 2d788f29f88b72f050f51d25f816db95ad9ace33 (patch) | |
| tree | fd8e90b5557638e064987b6da3dd91ca61186bc0 /gcc | |
| parent | 14144bb9f07bb9f1c5834d3eb70e4f0c2bb5b4b7 (diff) | |
| download | gcc-2d788f29f88b72f050f51d25f816db95ad9ace33.tar.gz | |
PR tree-optimization/55955
* tree-vect-loop.c (vectorizable_reduction): Give up early on
*SHIFT_EXPR and *ROTATE_EXPR codes.
* gcc.c-torture/compile/pr55955.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@195190 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr55955.c | 12 | ||||
| -rw-r--r-- | gcc/tree-vect-loop.c | 11 |
4 files changed, 32 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6b4f1d45fcf..ea0e4fa01a0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2013-01-15 Jakub Jelinek <jakub@redhat.com> + PR tree-optimization/55955 + * tree-vect-loop.c (vectorizable_reduction): Give up early on + *SHIFT_EXPR and *ROTATE_EXPR codes. + PR tree-optimization/48766 * opts.c (common_handle_option): For -fwrapv disable -ftrapv, for -ftrapv disable -fwrapv. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 26a479b3f52..a80f16bd856 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2013-01-15 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/55955 + * gcc.c-torture/compile/pr55955.c: New test. + 2013-01-15 Dodji Seketeli <dodji@redhat.com> PR c++/55663 diff --git a/gcc/testsuite/gcc.c-torture/compile/pr55955.c b/gcc/testsuite/gcc.c-torture/compile/pr55955.c new file mode 100644 index 00000000000..2656ffb94fb --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr55955.c @@ -0,0 +1,12 @@ +/* PR tree-optimization/55955 */ + +int b; + +void +foo (int x) +{ + int a; + for (a = x; a < 2; a++) + for (b = 0; b < 2; b++) + *(unsigned short *) 0x100000UL %= 46; +} diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 3a470e3c99c..d4f6bc72451 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -4776,6 +4776,17 @@ vectorizable_reduction (gimple stmt, gimple_stmt_iterator *gsi, { /* 4. Supportable by target? */ + if (code == LSHIFT_EXPR || code == RSHIFT_EXPR + || code == LROTATE_EXPR || code == RROTATE_EXPR) + { + /* Shifts and rotates are only supported by vectorizable_shifts, + not vectorizable_reduction. */ + if (dump_enabled_p ()) + dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, + "unsupported shift or rotation."); + return false; + } + /* 4.1. check support for the operation in the loop */ optab = optab_for_tree_code (code, vectype_in, optab_default); if (!optab) |