#57 Utility to replace 1 instruction with many

dibyendumajumdar · dibyendumajumdar · commit ce644ee08265 · 2025-08-10T23:23:23.000+01:00
diff --git a/optvm/src/main/java/com/compilerprogramming/ezlang/compiler/BasicBlock.java b/optvm/src/main/java/com/compilerprogramming/ezlang/compiler/BasicBlock.java
@@ -172,7 +172,17 @@ public int whichSucc(BasicBlock succ) {
         }
         throw new IllegalStateException();
     }
-
+    public void replaceInstruction(Instruction instruction, List<Instruction> replacements) {
+        int i;
+        for (i = 0; i < instructions.size(); i++)
+            if (instructions.get(i) == instruction)
+                break;
+        assert i < instructions.size();
+        for (int j = replacements.size()-1; j >= 0; j--) {
+            instructions.add(i+1, replacements.get(j));
+        }
+        instructions.remove(i);
+    }
     public static StringBuilder toStr(StringBuilder sb, BasicBlock bb, BitSet visited, boolean dumpLiveness)
     {
         if (visited.get(bb.bid))

Original file line number	Diff line number	Diff line change
`@@ -172,7 +172,17 @@ public int whichSucc(BasicBlock succ) {`
`172`	`172`	`}`
`173`	`173`	`throw new IllegalStateException();`
`174`	`174`	`}`
`175`		`-`
	`175`	`+ public void replaceInstruction(Instruction instruction, List<Instruction> replacements) {`
	`176`	`+ int i;`
	`177`	`+ for (i = 0; i < instructions.size(); i++)`
	`178`	`+ if (instructions.get(i) == instruction)`
	`179`	`+ break;`
	`180`	`+ assert i < instructions.size();`
	`181`	`+ for (int j = replacements.size()-1; j >= 0; j--) {`
	`182`	`+ instructions.add(i+1, replacements.get(j));`
	`183`	`+ }`
	`184`	`+ instructions.remove(i);`
	`185`	`+ }`
`176`	`186`	`public static StringBuilder toStr(StringBuilder sb, BasicBlock bb, BitSet visited, boolean dumpLiveness)`
`177`	`187`	`{`
`178`	`188`	`if (visited.get(bb.bid))`