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[WebAssembly] Add a TODO comment for a possible future optimization.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256306 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2015-12-23 00:22:04 +00:00
parent 982e9b7f0d
commit 97cdf9dc30
1 changed files with 2 additions and 1 deletions
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lib/Target/WebAssembly/WebAssemblyRegNumbering.cpp
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@ -82,7 +82,8 @@ bool WebAssemblyRegNumbering::runOnMachineFunction(MachineFunction &MF) {
}
// Then assign regular WebAssembly registers for all remaining used
// virtual registers.
// virtual registers. TODO: Consider sorting the registers by frequency of
// use, to maximize usage of small immediate fields.
unsigned NumArgRegs = MFI.getParams().size();
unsigned NumVRegs = MF.getRegInfo().getNumVirtRegs();
unsigned NumStackRegs = 0;