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When setting up the frame pointer, add it as a live-in register to all
non-entry blocks, so that it doesn't appear use-before-def anywhere. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61214 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -745,6 +745,11 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
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BuildMI(MBB, MBBI, TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr), FramePtr)
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.addReg(StackPtr);
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// Mark the FramePtr as live-in in every block except the entry.
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for (MachineFunction::iterator I = next(MF.begin()), E = MF.end();
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I != E; ++I)
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I->addLiveIn(FramePtr);
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// Realign stack
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if (needsStackRealignment(MF))
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BuildMI(MBB, MBBI,
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