diff options
Diffstat (limited to 'lib/Target/X86')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Target/X86/X86InstrInfo.h b/lib/Target/X86/X86InstrInfo.h index 9ed5210..b6f69af 100644 --- a/lib/Target/X86/X86InstrInfo.h +++ b/lib/Target/X86/X86InstrInfo.h @@ -389,7 +389,11 @@ public: /// optimizeLoadInstr - Try to remove the load by folding it to a register /// operand at the use. We fold the load instructions if and only if the - /// def and use are in the same BB. + /// def and use are in the same BB. We only look at one load and see + /// whether it can be folded into MI. FoldAsLoadDefReg is the virtual register + /// defined by the load we are trying to fold. DefMI returns the machine + /// instruction that defines FoldAsLoadDefReg, and the function returns + /// the machine instruction generated due to folding. virtual MachineInstr* optimizeLoadInstr(MachineInstr *MI, const MachineRegisterInfo *MRI, unsigned &FoldAsLoadDefReg, |