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| author | Bill Wendling <isanbard@gmail.com> | 2008-02-29 18:52:01 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-02-29 18:52:01 +0000 |
| commit | 97e3c01eb4ee6afff602ad11a2f2788ed7c83580 (patch) | |
| tree | 56f692cb9af104c4c742b3592628c87ce7615bc9 /lib/CodeGen/RegAllocLocal.cpp | |
| parent | 4f658e9e4b2c7c25779c304a90f460615d35e555 (diff) | |
If we reload a virtual register that's already been assigned, we want to mark
that instruction as its "last use". This fixes PR1925.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47758 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegAllocLocal.cpp')
| -rw-r--r-- | lib/CodeGen/RegAllocLocal.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp index 99fc6c9028..9e274543cf 100644 --- a/lib/CodeGen/RegAllocLocal.cpp +++ b/lib/CodeGen/RegAllocLocal.cpp @@ -480,8 +480,9 @@ MachineInstr *RALocal::reloadVirtReg(MachineBasicBlock &MBB, MachineInstr *MI, // If the virtual register is already available, just update the instruction // and return. if (unsigned PR = getVirt2PhysRegMapSlot(VirtReg)) { - MarkPhysRegRecentlyUsed(PR); // Already have this value available! + MarkPhysRegRecentlyUsed(PR); // Already have this value available! MI->getOperand(OpNum).setReg(PR); // Assign the input register + getVirtRegLastUse(VirtReg) = std::make_pair(MI, OpNum); return MI; } |