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Track reserved registers separately from RegsAvailable.
The bulk masking operations from register mask operands don't account for reserved registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151222 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -134,8 +134,9 @@ private:
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/// isUsed / isUnused - Test if a register is currently being used.
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/// isUsed / isUnused - Test if a register is currently being used.
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///
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///
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bool isUsed(unsigned Reg) const { return !RegsAvailable.test(Reg); }
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bool isUsed(unsigned Reg) const {
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bool isUnused(unsigned Reg) const { return RegsAvailable.test(Reg); }
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return !RegsAvailable.test(Reg) || ReservedRegs.test(Reg);
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}
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/// isAliasUsed - Is Reg or an alias currently in use?
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/// isAliasUsed - Is Reg or an alias currently in use?
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bool isAliasUsed(unsigned Reg) const;
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bool isAliasUsed(unsigned Reg) const;
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@@ -59,9 +59,6 @@ void RegScavenger::initRegState() {
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// All registers started out unused.
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// All registers started out unused.
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RegsAvailable.set();
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RegsAvailable.set();
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// Reserved registers are always used.
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RegsAvailable ^= ReservedRegs;
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if (!MBB)
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if (!MBB)
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return;
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return;
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@@ -225,9 +222,11 @@ void RegScavenger::forward() {
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void RegScavenger::getRegsUsed(BitVector &used, bool includeReserved) {
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void RegScavenger::getRegsUsed(BitVector &used, bool includeReserved) {
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used = RegsAvailable;
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used = RegsAvailable;
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if (!includeReserved)
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used |= ReservedRegs;
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used.flip();
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used.flip();
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if (includeReserved)
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used |= ReservedRegs;
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else
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used.reset(ReservedRegs);
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}
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}
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unsigned RegScavenger::FindUnusedReg(const TargetRegisterClass *RC) const {
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unsigned RegScavenger::FindUnusedReg(const TargetRegisterClass *RC) const {
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