diff options
Diffstat (limited to 'src/jit/lsraarmarch.cpp')
| -rw-r--r-- | src/jit/lsraarmarch.cpp | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/src/jit/lsraarmarch.cpp b/src/jit/lsraarmarch.cpp index 7d999d880f..f661babc5b 100644 --- a/src/jit/lsraarmarch.cpp +++ b/src/jit/lsraarmarch.cpp @@ -784,15 +784,24 @@ void Lowering::TreeNodeInfoInitBlockStore(GenTreeBlk* blkNode) if (blkNode->OperGet() == GT_STORE_OBJ) { // CopyObj - NYI_ARM("GT_STORE_OBJ is needed of write barriers implementation"); - -#ifdef _TARGET_ARM64_ - // We don't need to materialize the struct size but we still need // a temporary register to perform the sequence of loads and stores. blkNode->gtLsraInfo.internalIntCount = 1; + if (size >= 2 * REGSIZE_BYTES) + { + // We will use ldp/stp to reduce code size and improve performance + // so we need to reserve an extra internal register + blkNode->gtLsraInfo.internalIntCount++; + } + + // We can't use the special Write Barrier registers, so exclude them from the mask + regMaskTP internalIntCandidates = RBM_ALLINT & ~(RBM_WRITE_BARRIER_DST_BYREF | RBM_WRITE_BARRIER_SRC_BYREF); + blkNode->gtLsraInfo.setInternalCandidates(l, internalIntCandidates); + + // If we have a dest address we want it in RBM_WRITE_BARRIER_DST_BYREF. dstAddr->gtLsraInfo.setSrcCandidates(l, RBM_WRITE_BARRIER_DST_BYREF); + // If we have a source address we want it in REG_WRITE_BARRIER_SRC_BYREF. // Otherwise, if it is a local, codegen will put its address in REG_WRITE_BARRIER_SRC_BYREF, // which is killed by a StoreObj (and thus needn't be reserved). @@ -800,8 +809,6 @@ void Lowering::TreeNodeInfoInitBlockStore(GenTreeBlk* blkNode) { srcAddrOrFill->gtLsraInfo.setSrcCandidates(l, RBM_WRITE_BARRIER_SRC_BYREF); } - -#endif // _TARGET_ARM64_ } else { @@ -824,7 +831,8 @@ void Lowering::TreeNodeInfoInitBlockStore(GenTreeBlk* blkNode) if (size >= 2 * REGSIZE_BYTES) { - // Use ldp/stp to reduce code size and improve performance + // We will use ldp/stp to reduce code size and improve performance + // so we need to reserve an extra internal register internalIntCount++; } |