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[AArch64] Strengthen the code for the prologue insertion.

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The spilled registers are pristine and thus, correctly handled by
the register scavenger and so on, but the liveness information is
strictly speaking wrong at this point.
Fix that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234664 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Quentin Colombet 2015-04-10 23:14:34 +00:00
parent c127686d0e
commit b26cf11a7b
1 changed files with 2 additions and 0 deletions
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lib/Target/AArch64/AArch64FrameLowering.cpp
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@ -787,6 +787,8 @@ bool AArch64FrameLowering::spillCalleeSavedRegisters(
if (StrOpc == AArch64::STPDpre || StrOpc == AArch64::STPXpre)
MIB.addReg(AArch64::SP, RegState::Define);
MBB.addLiveIn(Reg1);
MBB.addLiveIn(Reg2);
MIB.addReg(Reg2, getPrologueDeath(MF, Reg2))
.addReg(Reg1, getPrologueDeath(MF, Reg1))
.addReg(AArch64::SP)