Am 04/21/2015 um 03:24 PM schrieb Georg-Johann Lay:
Without fat LTO objects, the compiler just puts gimple IR into the objects,
there is no asm code. Built-in functions are represented by their decls as
provided by targetm.builtin_decl(). This means there is no expansion of tree
to rtl.
That expansion is as late as possible (in principle it could even be in some
Should read instead:
That check for compile-time constant is as late as possible, namely at tree-rtl
lowering in targetm.expand_builtin (in principle it could even be in some
rtl pass; the assumption is that if the respective value has not been resolved
to integer_cst then the same applies to later passes.
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