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2015 Jan 07
2
[LLVMdev] Inclusion of iostream affects devirtualization in release_35
Hello, I've stumbled upon the following behavior in branches/release_35 (as of 218689) under ubuntu 14.04 LTS amd64: whenever I include the (system-wise) gnu iostream header, clang++ stops devirtualizing the following code: #if BREAKAGE_ENSUES #include <iostream> #endif struct Base { virtual int foo() const = 0; }; struct A : Base { int a; A(const int a) : a(a) { } int foo() const