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...ike a straightforward engineering > improvement to LLVM, and it feels worth doing to me. Does anyone feel > otherwise or have any suggestions? > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20161227/bd485de2/attachment.html>

Clang is currently missing some low-hanging performance and code size opportunities when receiving function parameters. For most scalar parameters, Clang typically emits an alloca and stores the LLVM SSA argument value into the alloca to initialize it. With optimizations, this initialization is often removed, but it stays behind in debug builds and when the user takes the address of a parameter (