[Sparc] Prevent instructions that defines or uses %o7 to be in call's delay slot.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182063 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/DelaySlotFiller.cpp b/lib/Target/Sparc/DelaySlotFiller.cpp
index 6123773..db3f159 100644
--- a/lib/Target/Sparc/DelaySlotFiller.cpp
+++ b/lib/Target/Sparc/DelaySlotFiller.cpp
@@ -61,8 +61,9 @@
bool isDelayFiller(MachineBasicBlock &MBB,
MachineBasicBlock::iterator candidate);
- void insertCallUses(MachineBasicBlock::iterator MI,
- SmallSet<unsigned, 32>& RegUses);
+ void insertCallDefsUses(MachineBasicBlock::iterator MI,
+ SmallSet<unsigned, 32>& RegDefs,
+ SmallSet<unsigned, 32>& RegUses);
void insertDefsUses(MachineBasicBlock::iterator MI,
SmallSet<unsigned, 32>& RegDefs,
@@ -150,7 +151,7 @@
//Call's delay filler can def some of call's uses.
if (slot->isCall())
- insertCallUses(slot, RegUses);
+ insertCallDefsUses(slot, RegDefs, RegUses);
else
insertDefsUses(slot, RegDefs, RegUses);
@@ -230,9 +231,12 @@
}
-void Filler::insertCallUses(MachineBasicBlock::iterator MI,
- SmallSet<unsigned, 32>& RegUses)
+void Filler::insertCallDefsUses(MachineBasicBlock::iterator MI,
+ SmallSet<unsigned, 32>& RegDefs,
+ SmallSet<unsigned, 32>& RegUses)
{
+ //Call defines o7, which is visible to the instruction in delay slot.
+ RegDefs.insert(SP::O7);
switch(MI->getOpcode()) {
default: llvm_unreachable("Unknown opcode.");