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changeset 16367:f0ac7457252a

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LSRA spill optimization: use the correct from location for the spill move.
author Josef Eisl <josef.eisl@jku.at>
date Wed, 11 Jun 2014 14:49:59 +0200
parents 0abb7a42ef75
children ef641ba1fb69
files graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/alloc/LinearScan.java
diffstat 1 files changed, 3 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/alloc/LinearScan.java	Tue Jun 10 16:43:26 2014 +0200
+++ b/graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/alloc/LinearScan.java	Wed Jun 11 14:49:59 2014 +0200
@@ -606,7 +606,9 @@
                                     insertionBuffer.init(instructions);
                                 }
 
-                                AllocatableValue fromLocation = interval.location();
+                                // if we spill in a dominator we need to find the right location
+                                AllocatableValue fromLocation = interval.spillState() == SpillState.SpillInDominator ? interval.getSplitChildAtOpId(opId, OperandMode.DEF, this).location()
+                                                : interval.location();
                                 AllocatableValue toLocation = canonicalSpillOpr(interval);
 
                                 assert isRegister(fromLocation) : "from operand must be a register but is: " + fromLocation + " toLocation=" + toLocation + " spillState=" + interval.spillState();