fix(Writer): don't compile virtual/downcast if there are no uses

yuri91 · yuri91 · commit c01ea7eff727 · 2024-10-17T16:36:37.000+02:00
diff --git a/llvm/lib/CheerpWriter/CheerpWriter.cpp b/llvm/lib/CheerpWriter/CheerpWriter.cpp
@@ -895,11 +895,15 @@ CheerpWriter::COMPILE_INSTRUCTION_FEEDBACK CheerpWriter::handleBuiltinCall(const
 	}
 	else if(intrinsicId==Intrinsic::cheerp_virtualcast)
 	{
+		if(callV.use_empty())
+			return COMPILE_EMPTY;
 		compileVirtualcast( callV );
 		return COMPILE_OK;
 	}
 	else if(intrinsicId==Intrinsic::cheerp_downcast)
 	{
+		if(callV.use_empty())
+			return COMPILE_EMPTY;
 		compileDowncast( callV );
 		return COMPILE_OK;
 	}

Original file line number	Diff line number	Diff line change
`@@ -895,11 +895,15 @@ CheerpWriter::COMPILE_INSTRUCTION_FEEDBACK CheerpWriter::handleBuiltinCall(const`
`895`	`895`	`}`
`896`	`896`	`else if(intrinsicId==Intrinsic::cheerp_virtualcast)`
`897`	`897`	`{`
	`898`	`+ if(callV.use_empty())`
	`899`	`+ return COMPILE_EMPTY;`
`898`	`900`	`compileVirtualcast( callV );`
`899`	`901`	`return COMPILE_OK;`
`900`	`902`	`}`
`901`	`903`	`else if(intrinsicId==Intrinsic::cheerp_downcast)`
`902`	`904`	`{`
	`905`	`+ if(callV.use_empty())`
	`906`	`+ return COMPILE_EMPTY;`
`903`	`907`	`compileDowncast( callV );`
`904`	`908`	`return COMPILE_OK;`
`905`	`909`	`}`