diff options
| author | Chris Lattner <sabre@nondot.org> | 2009-04-12 07:46:30 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-04-12 07:46:30 +0000 |
| commit | 36e3946ac2f30a0bda66538ef2b974b1c8fbdc97 (patch) | |
| tree | cdfddb34600ca2c2ee2fef89360da592e93ed847 /lib/CodeGen/SelectionDAG | |
| parent | c5040ab6065d5c569a1af0848b6e672b22b174b7 (diff) | |
| download | external_llvm-36e3946ac2f30a0bda66538ef2b974b1c8fbdc97.zip external_llvm-36e3946ac2f30a0bda66538ef2b974b1c8fbdc97.tar.gz external_llvm-36e3946ac2f30a0bda66538ef2b974b1c8fbdc97.tar.bz2 | |
make UpdateValueMap handle the possiblity that we could be
copying into the right register, avoiding a copy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68889 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 7e30053..251e96a 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -158,7 +158,7 @@ unsigned FastISel::UpdateValueMap(Value* I, unsigned Reg) { unsigned &AssignedReg = ValueMap[I]; if (AssignedReg == 0) AssignedReg = Reg; - else { + else if (Reg != AssignedReg) { const TargetRegisterClass *RegClass = MRI.getRegClass(Reg); TII.copyRegToReg(*MBB, MBB->end(), AssignedReg, Reg, RegClass, RegClass); |