diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-niter.c | 7 |
2 files changed, 11 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index acaea11..10137d6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2018-07-06 Kugan Vivekanandarajah <kuganv@linaro.org> + * tree-ssa-loop-niter.c (number_of_iterations_popcount): If popcount + argument is checked for zero before entering loop, avoid checking again. + +2018-07-06 Kugan Vivekanandarajah <kuganv@linaro.org> + * gimplify.h (generic_expr_could_trap_p): Set as global function. * gimplify.h (generic_expr_could_trap_p): Likwise. * tree-scalar-evolution.c (expression_expensive_p): Handle COND_EXPR. diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c index 03588a0..f6fa2f7 100644 --- a/gcc/tree-ssa-loop-niter.c +++ b/gcc/tree-ssa-loop-niter.c @@ -2596,10 +2596,15 @@ number_of_iterations_popcount (loop_p loop, edge exit, niter->niter = iter; niter->assumptions = boolean_true_node; + if (adjust) - niter->may_be_zero = fold_build2 (EQ_EXPR, boolean_type_node, src, + { + tree may_be_zero = fold_build2 (EQ_EXPR, boolean_type_node, src, build_zero_cst (TREE_TYPE (src))); + niter->may_be_zero = + simplify_using_initial_conditions (loop, may_be_zero); + } else niter->may_be_zero = boolean_false_node; |