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| author | Cliff Click <cliffc@acm.org> | 2023-10-28 14:23:48 -0700 |
|---|---|---|
| committer | Dibyendu Majumdar <dibyendumajumdar@users.noreply.github.com> | 2023-11-01 18:56:50 +0000 |
| commit | d8405f46790d85f5d18f8b04dbd4fd8116af08ea (patch) | |
| tree | cf194bb164e6b15ae73063eb74ac996c35ef447a /chapter05/src/main/java/com | |
| parent | 3a5441ce9eac49c3479375c95f2568a4c18e0bf1 (diff) | |
| download | Simple-d8405f46790d85f5d18f8b04dbd4fd8116af08ea.tar.gz Simple-d8405f46790d85f5d18f8b04dbd4fd8116af08ea.zip | |
Dont make redundant phis
Diffstat (limited to 'chapter05/src/main/java/com')
| -rw-r--r-- | chapter05/src/main/java/com/seaofnodes/simple/node/ScopeNode.java | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/chapter05/src/main/java/com/seaofnodes/simple/node/ScopeNode.java b/chapter05/src/main/java/com/seaofnodes/simple/node/ScopeNode.java index 60d2bd43..ba4758e4 100644 --- a/chapter05/src/main/java/com/seaofnodes/simple/node/ScopeNode.java +++ b/chapter05/src/main/java/com/seaofnodes/simple/node/ScopeNode.java @@ -116,7 +116,8 @@ public class ScopeNode extends Node { public RegionNode mergeScopes(ScopeNode that) { RegionNode r = (RegionNode)ctrl(new RegionNode(ctrl(), that.ctrl()).peephole()); for( int i=1; i<nIns(); i++ ) - set_def(i,new PhiNode(r, in(i), that.in(i)).peephole()); + if( in(1) != that.in(i) ) // No need for redundant Phis + set_def(i,new PhiNode(r, in(i), that.in(i)).peephole()); that.kill(); // Kill merged scope return r; } |