diff options
| author | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-20 14:19:12 +0000 |
|---|---|---|
| committer | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-20 14:19:12 +0000 |
| commit | 43780738cd22a2fbea5fd7d8260a76e0c3121f43 (patch) | |
| tree | 0567eba9d46edbae6337e20803e32610525d1bfe | |
| parent | fa816b0bfdbefc7ef44b3a6ae6f7d611700c078f (diff) | |
* loop-iv.c (iv_number_of_iterations): Record the upper bound
only if there are no further conditions on it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@192636 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/loop-iv.c | 18 |
2 files changed, 17 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ecba9c67c68..47263fd8232 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2012-10-20 Jan Hubicka <jh@suse.cz> + + * loop-iv.c (iv_number_of_iterations): Record the upper bound + only if there are no further conditions on it. + 2012-10-20 Manuel López-Ibáñez <manu@gcc.gnu.org> PR c/53063 diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c index 43d3c4e3ede..50b75362a97 100644 --- a/gcc/loop-iv.c +++ b/gcc/loop-iv.c @@ -2593,8 +2593,10 @@ iv_number_of_iterations (struct loop *loop, rtx insn, rtx condition, ? iv0.base : mode_mmin); max = (up - down) / inc + 1; - record_niter_bound (loop, double_int::from_uhwi (max), - false, true); + if (!desc->infinite + && !desc->assumptions) + record_niter_bound (loop, double_int::from_uhwi (max), + false, true); if (iv0.step == const0_rtx) { @@ -2806,15 +2808,19 @@ iv_number_of_iterations (struct loop *loop, rtx insn, rtx condition, desc->const_iter = true; desc->niter = val & GET_MODE_MASK (desc->mode); - record_niter_bound (loop, double_int::from_uhwi (desc->niter), - false, true); + if (!desc->infinite + && !desc->assumptions) + record_niter_bound (loop, double_int::from_uhwi (desc->niter), + false, true); } else { max = determine_max_iter (loop, desc, old_niter); gcc_assert (max); - record_niter_bound (loop, double_int::from_uhwi (max), - false, true); + if (!desc->infinite + && !desc->assumptions) + record_niter_bound (loop, double_int::from_uhwi (max), + false, true); /* simplify_using_initial_values does a copy propagation on the registers in the expression for the number of iterations. This prolongs life |