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| 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 | 975f78ae79d56e8cb8285f00fdf829f3a094ee09 (patch) | |
| tree | 87bacd0e1d9534f865a92f83df1c366efbb6c8fb /llvm/lib/Target/X86/X86RegisterInfo.cpp | |
| parent | 0ab1144c790e2693cf1afe0105eb0e3f18dd8265 (diff) | |
| download | bcm5719-llvm-975f78ae79d56e8cb8285f00fdf829f3a094ee09.tar.gz bcm5719-llvm-975f78ae79d56e8cb8285f00fdf829f3a094ee09.zip | |
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.
llvm-svn: 61214
Diffstat (limited to 'llvm/lib/Target/X86/X86RegisterInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86RegisterInfo.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp index 4bdfd8c101d..4f4a33db74b 100644 --- a/llvm/lib/Target/X86/X86RegisterInfo.cpp +++ b/llvm/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, |
