diff options
Diffstat (limited to 'gcc/tree-ssa-loop-ivcanon.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivcanon.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/gcc/tree-ssa-loop-ivcanon.c b/gcc/tree-ssa-loop-ivcanon.c index 25193b4..ae66ace 100644 --- a/gcc/tree-ssa-loop-ivcanon.c +++ b/gcc/tree-ssa-loop-ivcanon.c @@ -76,10 +76,13 @@ enum unroll_level }; /* Adds a canonical induction variable to LOOP iterating NITER times. EXIT - is the exit edge whose condition is replaced. */ + is the exit edge whose condition is replaced. The ssa versions of the new + IV before and after increment will be stored in VAR_BEFORE and VAR_AFTER + if they are not NULL. */ -static void -create_canonical_iv (struct loop *loop, edge exit, tree niter) +void +create_canonical_iv (struct loop *loop, edge exit, tree niter, + tree *var_before = NULL, tree *var_after = NULL) { edge in; tree type, var; @@ -112,7 +115,9 @@ create_canonical_iv (struct loop *loop, edge exit, tree niter) create_iv (niter, build_int_cst (type, -1), NULL_TREE, loop, - &incr_at, false, NULL, &var); + &incr_at, false, var_before, &var); + if (var_after) + *var_after = var; cmp = (exit->flags & EDGE_TRUE_VALUE) ? EQ_EXPR : NE_EXPR; gimple_cond_set_code (cond, cmp); |