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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-02-19 00:38:43 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-02-19 00:38:43 +0000 |
| commit | fd38917d4d040759d75e9d1f4e2c885fb40ba2d7 (patch) | |
| tree | dafdd21967740a0c8627d474cb59fb330536e027 /lib/CodeGen/VirtRegMap.h | |
| parent | a2ebf60ef2c434428af7f810b13327ab50245a67 (diff) | |
| download | llvm-fd38917d4d040759d75e9d1f4e2c885fb40ba2d7.tar.gz llvm-fd38917d4d040759d75e9d1f4e2c885fb40ba2d7.tar.bz2 llvm-fd38917d4d040759d75e9d1f4e2c885fb40ba2d7.tar.xz | |
This method belonged in VirtRegMap.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126002 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/VirtRegMap.h')
| -rw-r--r-- | lib/CodeGen/VirtRegMap.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h index 23101ce74f..ba50f4e423 100644 --- a/lib/CodeGen/VirtRegMap.h +++ b/lib/CodeGen/VirtRegMap.h @@ -218,6 +218,15 @@ namespace llvm { return Virt2SplitMap[virtReg]; } + /// getOriginal - Return the original virtual register that VirtReg descends + /// from through splitting. + /// A register that was not created by splitting is its own original. + /// This operation is idempotent. + unsigned getOriginal(unsigned VirtReg) const { + unsigned Orig = getPreSplitReg(VirtReg); + return Orig ? Orig : VirtReg; + } + /// @brief returns true if the specified virtual register is not /// mapped to a stack slot or rematerialized. bool isAssignedReg(unsigned virtReg) const { |