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This test framework feature is inspired by a similar feature in LLVM. The programmer writes a bit of Cmm #include "Cmm.h" // Large memcpy's should lower to calls. callMemcpy { W_ dst, src; prim %memcpy(dst "ptr", src "ptr", 1024, 4) []; } and asserts what the generated assembly should look like, modulo register naming. callMemcpy: movq ; Move arguments into place movq movl movl call memcpy Patch edited and updated by Simon Marlow, and I also added a test for unrolling memcpy and a simple constant-propagation test.
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