diff options
| author | Dan Gohman <gohman@apple.com> | 2008-12-18 22:01:52 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-12-18 22:01:52 +0000 |
| commit | 34d6ad73e13a443ab013ea48c9d7e46b61577a76 (patch) | |
| tree | 3162f4eb27a5efe75352ed28b2553cb5d8d0129b | |
| parent | 2ccc83966914593d98af5671ce10a3bf2dcf7513 (diff) | |
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
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index 4bdfd8c101..4f4a33db74 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -745,6 +745,11 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const { BuildMI(MBB, MBBI, TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr), FramePtr) .addReg(StackPtr); + // Mark the FramePtr as live-in in every block except the entry. + for (MachineFunction::iterator I = next(MF.begin()), E = MF.end(); + I != E; ++I) + I->addLiveIn(FramePtr); + // Realign stack if (needsStackRealignment(MF)) BuildMI(MBB, MBBI, |