From a5135f60dd95275dcbc1123f866889151ced933d Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Tue, 1 Jun 2010 22:39:25 +0000 Subject: Properly compose subregister indices when coalescing. The comment about ordering of subreg indices is no longer true. This exposed a bug in the new substVirtReg method that is also fixed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105294 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineInstr.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'lib/CodeGen/MachineInstr.cpp') diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index ce0c5e6a87..402178dc6d 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -117,7 +117,8 @@ void MachineOperand::substVirtReg(unsigned Reg, unsigned SubIdx, if (SubIdx && getSubReg()) SubIdx = TRI.composeSubRegIndices(SubIdx, getSubReg()); setReg(Reg); - setSubReg(SubIdx); + if (SubIdx) + setSubReg(SubIdx); } void MachineOperand::substPhysReg(unsigned Reg, const TargetRegisterInfo &TRI) { -- cgit v1.2.3-70-g09d2