diff options
Diffstat (limited to 'src/jit/lsraarm.cpp')
| -rw-r--r-- | src/jit/lsraarm.cpp | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/jit/lsraarm.cpp b/src/jit/lsraarm.cpp index e8f70475c4..83b150b7eb 100644 --- a/src/jit/lsraarm.cpp +++ b/src/jit/lsraarm.cpp @@ -214,7 +214,18 @@ void LinearScan::TreeNodeInfoInit(GenTree* tree) } // Set the default dstCount. This may be modified below. - info->dstCount = tree->IsValue() ? 1 : 0; + if (tree->IsValue()) + { + info->dstCount = 1; + if (tree->IsUnusedValue()) + { + info->isLocalDefUse = true; + } + } + else + { + info->dstCount = 0; + } switch (tree->OperGet()) { @@ -442,6 +453,10 @@ void LinearScan::TreeNodeInfoInit(GenTree* tree) case GT_LONG: assert(tree->IsUnusedValue()); // Contained nodes are already processed, only unused GT_LONG can reach here. + // An unused GT_LONG doesn't produce any registers. + tree->gtType = TYP_VOID; + tree->ClearUnusedValue(); + info->isLocalDefUse = false; // An unused GT_LONG node needs to consume its sources. info->srcCount = 2; @@ -796,6 +811,8 @@ void LinearScan::TreeNodeInfoInit(GenTree* tree) } // We need to be sure that we've set info->srcCount and info->dstCount appropriately assert((info->dstCount < 2) || tree->IsMultiRegNode()); + assert(info->isLocalDefUse == (tree->IsValue() && tree->IsUnusedValue())); + assert(!tree->IsUnusedValue() || (info->dstCount != 0)); } #endif // _TARGET_ARM_ |