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changeset 4821:52474ec73861

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7132936: guarantee(t != NULL) failed: must be con Summary: Use !higher_equal() check to skip top and values which fit. Reviewed-by: never
author kvn
date Tue, 24 Jan 2012 17:04:51 -0800
parents dddf0be88eb1
children 94f0ce74d48e
files src/share/vm/opto/memnode.cpp
diffstat 1 files changed, 8 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/vm/opto/memnode.cpp	Tue Jan 24 17:00:51 2012 -0800
+++ b/src/share/vm/opto/memnode.cpp	Tue Jan 24 17:04:51 2012 -0800
@@ -1764,7 +1764,8 @@
 const Type* LoadBNode::Value(PhaseTransform *phase) const {
   Node* mem = in(MemNode::Memory);
   Node* value = can_see_stored_value(mem,phase);
-  if (value != NULL && value->is_Con()) {
+  if (value != NULL && value->is_Con() &&
+      !value->bottom_type()->higher_equal(_type)) {
     // If the input to the store does not fit with the load's result type,
     // it must be truncated. We can't delay until Ideal call since
     // a singleton Value is needed for split_thru_phi optimization.
@@ -1793,7 +1794,8 @@
 const Type* LoadUBNode::Value(PhaseTransform *phase) const {
   Node* mem = in(MemNode::Memory);
   Node* value = can_see_stored_value(mem,phase);
-  if (value != NULL && value->is_Con()) {
+  if (value != NULL && value->is_Con() &&
+      !value->bottom_type()->higher_equal(_type)) {
     // If the input to the store does not fit with the load's result type,
     // it must be truncated. We can't delay until Ideal call since
     // a singleton Value is needed for split_thru_phi optimization.
@@ -1822,7 +1824,8 @@
 const Type* LoadUSNode::Value(PhaseTransform *phase) const {
   Node* mem = in(MemNode::Memory);
   Node* value = can_see_stored_value(mem,phase);
-  if (value != NULL && value->is_Con()) {
+  if (value != NULL && value->is_Con() &&
+      !value->bottom_type()->higher_equal(_type)) {
     // If the input to the store does not fit with the load's result type,
     // it must be truncated. We can't delay until Ideal call since
     // a singleton Value is needed for split_thru_phi optimization.
@@ -1853,7 +1856,8 @@
 const Type* LoadSNode::Value(PhaseTransform *phase) const {
   Node* mem = in(MemNode::Memory);
   Node* value = can_see_stored_value(mem,phase);
-  if (value != NULL && value->is_Con()) {
+  if (value != NULL && value->is_Con() &&
+      !value->bottom_type()->higher_equal(_type)) {
     // If the input to the store does not fit with the load's result type,
     // it must be truncated. We can't delay until Ideal call since
     // a singleton Value is needed for split_thru_phi optimization.