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| author | zqchen <zqchen@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-08-07 04:54:06 +0000 |
|---|---|---|
| committer | zqchen <zqchen@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-08-07 04:54:06 +0000 |
| commit | dd41e03cbf28aea329757e8d1a72970e22be3c75 (patch) | |
| tree | 68e96db1207de96e14f3c0c839ed05fc9d7d85ee /gcc/tree-ssa-loop-ivopts.c | |
| parent | 39e3cef3b4444b6de1d917ef489f021b6dd883b6 (diff) | |
| download | gcc-dd41e03cbf28aea329757e8d1a72970e22be3c75.tar.gz | |
ChangeLog
2014-08-07 Zhenqiang Chen <zhenqiang.chen@arm.com>
* tree-ssa-loop-ivopts.c (get_address_cost): Try aligned offset.
testsuite/ChangeLog
2014-08-07 Zhenqiang Chen <zhenqiang.chen@arm.com>
* gcc.target/arm/get_address_cost_aligned_max_offset.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@213691 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-loop-ivopts.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 134a51b3abf..98b60abdcb5 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -3309,6 +3309,18 @@ get_address_cost (bool symbol_present, bool var_present, XEXP (addr, 1) = gen_int_mode (off, address_mode); if (memory_address_addr_space_p (mem_mode, addr, as)) break; + /* For some TARGET, like ARM THUMB1, the offset should be nature + aligned. Try an aligned offset if address_mode is not QImode. */ + off = (address_mode == QImode) + ? 0 + : ((unsigned HOST_WIDE_INT) 1 << i) + - GET_MODE_SIZE (address_mode); + if (off > 0) + { + XEXP (addr, 1) = gen_int_mode (off, address_mode); + if (memory_address_addr_space_p (mem_mode, addr, as)) + break; + } } if (i == -1) off = 0; |