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6930116: loop predication code does not handle If nodes with only one projection

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Add check for iff->outcnt() < 2.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2010-02-25 22:58:43 -08:00
parent 8554996b9b
commit 667e7ff0c0
1 changed files with 2 additions and 0 deletions
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hotspot/src/share/vm/opto/loopTransform.cpp
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@ -1785,6 +1785,8 @@ bool PhaseIdealLoop::is_uncommon_trap_proj(ProjNode* proj, bool must_reason_pred
bool PhaseIdealLoop::is_uncommon_trap_if_pattern(ProjNode *proj, bool must_reason_predicate) {
Node *in0 = proj->in(0);
if (!in0->is_If()) return false;
// Variation of a dead If node.
if (in0->outcnt() < 2) return false;
IfNode* iff = in0->as_If();
// we need "If(Conv2B(Opaque1(...)))" pattern for must_reason_predicate