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| author | Evan Cheng <evan.cheng@apple.com> | 2009-08-05 01:57:22 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-08-05 01:57:22 +0000 |
| commit | 95374eb8c992d869780fcf1b424ee7d795d27e3c (patch) | |
| tree | 431dcfdf735121f679c3c5634eef5b46f21e0589 /lib/CodeGen/LowerSubregs.cpp | |
| parent | 9178de1d2b1e0787539b83ed54ad505ff13169e8 (diff) | |
| download | external_llvm-95374eb8c992d869780fcf1b424ee7d795d27e3c.zip external_llvm-95374eb8c992d869780fcf1b424ee7d795d27e3c.tar.gz external_llvm-95374eb8c992d869780fcf1b424ee7d795d27e3c.tar.bz2 | |
One more place where subreg lowering forgot to transfer undefness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78144 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LowerSubregs.cpp')
| -rw-r--r-- | lib/CodeGen/LowerSubregs.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/CodeGen/LowerSubregs.cpp b/lib/CodeGen/LowerSubregs.cpp index e9e60a0..358aa16 100644 --- a/lib/CodeGen/LowerSubregs.cpp +++ b/lib/CodeGen/LowerSubregs.cpp @@ -242,9 +242,12 @@ bool LowerSubregsInstructionPass::LowerInsert(MachineInstr *MI) { // No need to insert an identity copy instruction. If the SrcReg was // <undef>, we need to make sure it is alive by inserting an IMPLICIT_DEF if (MI->getOperand(1).isUndef() && !MI->getOperand(0).isDead()) { - BuildMI(*MBB, MI, MI->getDebugLoc(), - TII.get(TargetInstrInfo::IMPLICIT_DEF), DstReg) - .addReg(InsReg, RegState::ImplicitKill); + MachineInstrBuilder MIB = BuildMI(*MBB, MI, MI->getDebugLoc(), + TII.get(TargetInstrInfo::IMPLICIT_DEF), DstReg); + if (MI->getOperand(2).isUndef()) + MIB.addReg(InsReg, RegState::Implicit | RegState::Undef); + else + MIB.addReg(InsReg, RegState::ImplicitKill); } else { DOUT << "subreg: eliminated!\n"; MBB->erase(MI); |