Mercurial > hg > truffle
diff src/share/vm/opto/compile.cpp @ 14495:cd5d10655495
8027754: Enable loop optimizations for loops with MathExact inside
Reviewed-by: kvn, iveresov
author | rbackman |
---|---|
date | Thu, 23 Jan 2014 12:08:28 +0100 |
parents | 45467c53f178 |
children | fdad2932c73f |
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--- a/src/share/vm/opto/compile.cpp Mon Feb 24 15:12:26 2014 -0800 +++ b/src/share/vm/opto/compile.cpp Thu Jan 23 12:08:28 2014 +0100 @@ -3028,42 +3028,6 @@ n->set_req(MemBarNode::Precedent, top()); } break; - // Must set a control edge on all nodes that produce a FlagsProj - // so they can't escape the block that consumes the flags. - // Must also set the non throwing branch as the control - // for all nodes that depends on the result. Unless the node - // already have a control that isn't the control of the - // flag producer - case Op_FlagsProj: - { - MathExactNode* math = (MathExactNode*) n->in(0); - Node* ctrl = math->control_node(); - Node* non_throwing = math->non_throwing_branch(); - math->set_req(0, ctrl); - - Node* result = math->result_node(); - if (result != NULL) { - for (DUIterator_Fast jmax, j = result->fast_outs(jmax); j < jmax; j++) { - Node* out = result->fast_out(j); - // Phi nodes shouldn't be moved. They would only match below if they - // had the same control as the MathExactNode. The only time that - // would happen is if the Phi is also an input to the MathExact - // - // Cmp nodes shouldn't have control set at all. - if (out->is_Phi() || - out->is_Cmp()) { - continue; - } - - if (out->in(0) == NULL) { - out->set_req(0, non_throwing); - } else if (out->in(0) == ctrl) { - out->set_req(0, non_throwing); - } - } - } - } - break; default: assert( !n->is_Call(), "" ); assert( !n->is_Mem(), "" );