tree b84345f5b0f6dfeabbe42e7c6098750390176043
parent 60c24975c0cd2d2b40d6e53a9a6bfea86f7433fa
author Shiva Chen <shiva0217@gmail.com> 1571105069 +0000
committer Shiva Chen <shiva0217@gmail.com> 1571105069 +0000

[RISCV] Support fast calling convention

LLVM may annotate the function with fastcc if there has only one caller
and there're no other caller out of the module and the function is not
naked or contain variable arguments.

The fastcc functions could pass the arguments by the caller saved registers.

Differential Revision: https://reviews.llvm.org/D68559

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374857 91177308-0d34-0410-b5e6-96231b3b80d8