mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-26 04:32:44 +01:00
2529cb73ff
This patch implements out of line atomics for LSE deployment mechanism. Details how it works can be found in llvm/docs/Atomics.rst Options -moutline-atomics and -mno-outline-atomics to enable and disable it were added to clang driver. This is clang and llvm part of out-of-line atomics interface, library part is already supported by libgcc. Compiler-rt support is provided in separate patch. Differential Revision: https://reviews.llvm.org/D91157
19 lines
958 B
LLVM
19 lines
958 B
LLVM
; RUN: llc -mtriple arm64-apple-ios -mattr=+lse %s -o - | FileCheck %s
|
|
; RUN: llc -mtriple arm64-apple-ios -mattr=+lse -mattr=+outline-atomics %s -o - | FileCheck %s
|
|
|
|
; Only "even,even+1" pairs are valid for CASP instructions. Make sure LLVM
|
|
; doesn't allocate odd ones and that it can copy them around properly. N.b. we
|
|
; don't actually check that they're sequential because FileCheck can't; odd/even
|
|
; will have to be good enough.
|
|
define void @test_atomic_cmpxchg_i128_register_shuffling(i128* %addr, i128 %desired, i128 %new) nounwind {
|
|
; CHECK-LABEL: test_atomic_cmpxchg_i128_register_shuffling:
|
|
; CHECK-DAG: mov [[DESIRED_LO:x[0-9]*[02468]]], x1
|
|
; CHECK-DAG: mov [[DESIRED_HI:x[0-9]*[13579]]], x2
|
|
; CHECK-DAG: mov [[NEW_LO:x[0-9]*[02468]]], x3
|
|
; CHECK-DAG: mov [[NEW_HI:x[0-9]*[13579]]], x4
|
|
; CHECK: caspal [[DESIRED_LO]], [[DESIRED_HI]], [[NEW_LO]], [[NEW_HI]], [x0]
|
|
|
|
%res = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
|
|
ret void
|
|
}
|