[PATCH] D48580: [AArch64] Support reserving x1-7 registers.

[Manoj Gupta via Phabricator via llvm-commits]

manojgupta added a comment.

@efriedma  Maybe not relevant to the patch here but our kernel devs were looking into preserve_all but it does not seem to work for AArch64.

$ cat test.c 
void __attribute__((preserve_all)) foo(void *ptr) { }

$ clang -c test.c -> compiles for x86_64
$ clang -c -target aarch64-unknown-linux-gnu

fatal error: error in backend: Unsupported calling convention.


Repository:
  rL LLVM

https://reviews.llvm.org/D48580