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2016 Sep 12
6
[RFC] Register Rematerialization (remat) Extension
Hello Developers,
I am working with my other batchmates to improve register remat in LLVM.
We want to remat live ranges made of multiple instruction.
Just to support our proposal here is a simple example that currently remat
does
not cover
$ cat ~/tmp/tl.c
void foo(long);
void bar() {
for (int i = 0; i < 1600; ++i)
foo(3494348345984503943);
}
$ clang -O3 -S -o - ~/tmp/tl.c -target