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changeset 2531:eca17668badf

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Remove dead code elimination 1
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 18:17:18 +0200
parents 7e7f817bdb28
children 3fca504f28ba
files graal/GraalCompiler/src/com/sun/c1x/graph/IR.java graal/GraalCompiler/src/com/sun/c1x/opt/LivenessMarker.java
diffstat 2 files changed, 0 insertions(+), 32 deletions(-) [+]
line wrap: on
line diff
--- a/graal/GraalCompiler/src/com/sun/c1x/graph/IR.java	Wed Apr 27 17:05:26 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/graph/IR.java	Wed Apr 27 18:17:18 2011 +0200
@@ -28,7 +28,6 @@
 import com.sun.c1x.debug.*;
 import com.sun.c1x.ir.*;
 import com.sun.c1x.observer.*;
-import com.sun.c1x.opt.*;
 import com.sun.c1x.value.*;
 
 /**
@@ -88,7 +87,6 @@
             C1XTimers.HIR_OPTIMIZE.start();
         }
 
-        optimize1();
         computeLinearScanOrder();
 
         if (C1XOptions.PrintTimers) {
@@ -109,13 +107,6 @@
         }
     }
 
-    private void optimize1() {
-        if (C1XOptions.OptDeadCodeElimination1) {
-            new LivenessMarker(this).removeDeadCode();
-            verifyAndPrint("After dead code elimination 1");
-        }
-    }
-
     private void computeLinearScanOrder() {
         if (C1XOptions.GenLIR) {
             makeLinearScanOrder();
--- a/graal/GraalCompiler/src/com/sun/c1x/opt/LivenessMarker.java	Wed Apr 27 17:05:26 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/opt/LivenessMarker.java	Wed Apr 27 18:17:18 2011 +0200
@@ -24,7 +24,6 @@
 
 import static com.sun.c1x.ir.Value.Flag.*;
 
-import com.sun.c1x.*;
 import com.sun.c1x.graph.*;
 import com.sun.c1x.ir.*;
 import com.sun.c1x.value.*;
@@ -79,28 +78,6 @@
         return count;
     }
 
-    public void removeDeadCode() {
-        // second pass: remove dead instructions from blocks
-        ir.startBlock.iteratePreOrder(new BlockClosure() {
-            public void apply(BlockBegin block) {
-                Instruction prev = block;
-                Instruction i = block.next();
-                while (i != null) {
-                    if (i.isLive()) {
-                        prev.resetNext(i); // skip any previous dead instructions
-                        prev = i;
-                    } else {
-                        C1XMetrics.DeadCodeEliminated++;
-                    }
-                    i = i.next();
-                }
-            }
-        });
-        // clear all marks on all instructions
-        valueMarker.clearAll();
-        deoptMarker.clearAll();
-    }
-
     private static class Link {
         final Value value;
         Link next;