Summary: The GR740 provides an up cycle counter in the registers ASR22
and ASR23. As these registers can not be read together atomically we only
use the value of ASR23 for llvm.readcyclecounter(). The ASR23 register
holds the 32 LSBs of the up-counter.
Reviewers: jyknight, venkatra
Reviewed By: jyknight
Subscribers: jfb, fedor.sergeev, jrtc27, llvm-commits
Differential Revision: https://reviews.llvm.org/D48638
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340733 91177308-0d34-0410-b5e6-96231b3b80d8
It breaks when using EXPENSIVE_CHECKS with the error message
"Bad machine code: Using an undefined physical register".
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339570 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: The GR740 provides an up cycle counter in the
registers ASR22 and ASR23. As these registers can not be
read together atomically we only use the value of ASR23
for llvm.readcyclecounter(). The ASR23 register holds the
32 LSBs of the up-counter.
Reviewers: jyknight, venkatra
Reviewed By: jyknight
Subscribers: fedor.sergeev, jrtc27, llvm-commits
Differential Revision: https://reviews.llvm.org/D48638
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339551 91177308-0d34-0410-b5e6-96231b3b80d8
Daniel Cederman