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-rw-r--r--llvm/lib/CodeGen/LiveIntervalAnalysis.cpp6
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
index eadd47b009b..aae27bb882d 100644
--- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -336,12 +336,14 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
// time we see a vreg.
if (interval.empty()) {
// Remember if the definition can be rematerialized. All load's from fixed
- // stack slots are re-materializable.
+ // stack slots are re-materializable. The target may permit other loads to
+ // be re-materialized as well.
int FrameIdx = 0;
if (vi.DefInst &&
(tii_->isReMaterializable(vi.DefInst->getOpcode()) ||
(tii_->isLoadFromStackSlot(vi.DefInst, FrameIdx) &&
- mf_->getFrameInfo()->isFixedObjectIndex(FrameIdx))))
+ mf_->getFrameInfo()->isFixedObjectIndex(FrameIdx)) ||
+ tii_->isOtherReMaterializableLoad(vi.DefInst)))
interval.remat = vi.DefInst;
// Get the Idx of the defining instructions.
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