search for: pvfn1

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2010 Oct 11
4
[LLVMdev] Missed devirtualization opportunities
...ethod call is devirtualized by -std-compile-opts %puts = call i32 @puts(i8* getelementptr inbounds ([2 x i8]* @str, i32 0, i32 0)) ; Call the virtual function. ; load the instance's vtbl pointer. %pVtbl1 = load %classvtbltype.TestVirtual** %ppVtbl ; load the function pointer from the vtbl %ppVfn1 = getelementptr %classvtbltype.TestVirtual* %pVtbl1, i64 0, i32 0 %pVfn1 = load void (%class.TestVirtual*)** %ppVfn1 ; call the virtual method. call void %pVfn1(class.TestVirtual* %pinstance) ; ... } (clang put in a bunch of bitcasts and stuck the vtbl itself into an array; ripping all that out...