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Based on the testcase for pr3120, running on my MacPro with Xeon processors,

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it is definitely profitable to tail duplicate indirect branches for x86.
This is likely to be true to various degrees for all modern x86 processors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89865 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2009-11-25 17:27:53 +00:00
parent d71cebf575
commit 4a66e5bfc2
1 changed files with 2 additions and 0 deletions
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2
lib/Target/X86/X86InstrInfo.h
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@ -632,6 +632,8 @@ public:
///
unsigned getGlobalBaseReg(MachineFunction *MF) const;
virtual bool isProfitableToDuplicateIndirectBranch() const { return true; }
private:
MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
MachineInstr* MI,