X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Finternal%2Fcodegen%2Fssa%2Fstatements%2FLetStatement.java;fp=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Finternal%2Fcodegen%2Fssa%2Fstatements%2FLetStatement.java;h=d2dcf431a2a7253037d0384ecd2651e3ba1ec879;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/codegen/ssa/statements/LetStatement.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/codegen/ssa/statements/LetStatement.java
new file mode 100644
index 000000000..d2dcf431a
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/codegen/ssa/statements/LetStatement.java
@@ -0,0 +1,38 @@
+package org.simantics.scl.compiler.internal.codegen.ssa.statements;
+
+import org.simantics.scl.compiler.internal.codegen.references.BoundVar;
+import org.simantics.scl.compiler.internal.codegen.ssa.SSAStatement;
+import org.simantics.scl.compiler.internal.codegen.ssa.binders.BoundVarBinder;
+import org.simantics.scl.compiler.internal.codegen.utils.SSASimplificationContext;
+import org.simantics.scl.compiler.internal.codegen.utils.SSAValidationContext;
+
+public abstract class LetStatement extends SSAStatement implements BoundVarBinder {
+    BoundVar target;
+
+    public LetStatement(BoundVar target) {
+        setTarget(target);
+    }
+    
+    @Override
+    public void simplify(SSASimplificationContext context) {
+        if(target.hasNoOccurences()) {
+            remove();
+            context.markModified("dead-let-statement");
+        }                   
+    }
+    
+    public BoundVar getTarget() {
+        return target;
+    }
+    
+    public void setTarget(BoundVar target) {
+        this.target = target;
+        target.parent = this;
+    }
+    
+    @Override
+    public void addBoundVariablesTo(SSAValidationContext context) {
+        context.validBoundVariables.add(target);        
+    }
+
+}