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| author | amker <amker@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-07 08:34:02 +0000 |
|---|---|---|
| committer | amker <amker@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-07 08:34:02 +0000 |
| commit | be3e66f7a5542d200e63fc8b00f9cd3bcf5db999 (patch) | |
| tree | d117536054d5fdf9039e45d6c0a4d1915332bb5d /gcc/tree-ssa-loop-ivopts.c | |
| parent | 388424f0d3a9b723b8f87976aa650dde8c905f7e (diff) | |
| download | gcc-be3e66f7a5542d200e63fc8b00f9cd3bcf5db999.tar.gz | |
* tree-ssa-loop-ivopts.c (get_shiftadd_cost): Check equality
using operand_equal_p.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204498 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-loop-ivopts.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 220aae6878b..f7da1267416 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -3500,17 +3500,21 @@ get_shiftadd_cost (tree expr, enum machine_mode mode, comp_cost cost0, int m = exact_log2 (int_cst_value (cst)); int maxm = MIN (BITS_PER_WORD, GET_MODE_BITSIZE (mode)); int sa_cost; + bool equal_p = false; if (!(m >= 0 && m < maxm)) return false; + if (operand_equal_p (op1, mult, 0)) + equal_p = true; + sa_cost = (TREE_CODE (expr) != MINUS_EXPR ? shiftadd_cost (speed, mode, m) - : (mult == op1 + : (equal_p ? shiftsub1_cost (speed, mode, m) : shiftsub0_cost (speed, mode, m))); res = new_cost (sa_cost, 0); - res = add_costs (res, mult == op1 ? cost0 : cost1); + res = add_costs (res, equal_p ? cost0 : cost1); STRIP_NOPS (multop); if (!is_gimple_val (multop)) |