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| author | Manman Ren <mren@apple.com> | 2012-07-02 18:55:36 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-07-02 18:55:36 +0000 |
| commit | 5f917cd3fada4507c0f4b718dd6af24b5e7086f1 (patch) | |
| tree | 1c7130312ce7a92744826c2208d8247345edf990 /lib/CodeGen/MachineRegisterInfo.cpp | |
| parent | 49589f0d0e35f643e697ab7ae8a51a530d38b0d8 (diff) | |
| download | llvm-5f917cd3fada4507c0f4b718dd6af24b5e7086f1.tar.gz llvm-5f917cd3fada4507c0f4b718dd6af24b5e7086f1.tar.bz2 llvm-5f917cd3fada4507c0f4b718dd6af24b5e7086f1.tar.xz | |
Added assertion in getVRegDef of MachineRegisterInfo to make sure the virtual
register does not have multiple definitions. Modified TwoAddressInstructionPass
to use getUniqueVRegDef instead of getVRegDef.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159545 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineRegisterInfo.cpp')
| -rw-r--r-- | lib/CodeGen/MachineRegisterInfo.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp index 863da72774..82e123528a 100644 --- a/lib/CodeGen/MachineRegisterInfo.cpp +++ b/lib/CodeGen/MachineRegisterInfo.cpp @@ -162,6 +162,8 @@ void MachineRegisterInfo::replaceRegWith(unsigned FromReg, unsigned ToReg) { MachineInstr *MachineRegisterInfo::getVRegDef(unsigned Reg) const { // Since we are in SSA form, we can use the first definition. def_iterator I = def_begin(Reg); + assert((I.atEnd() || llvm::next(I) == def_end()) && + "getVRegDef assumes a single definition or no definition"); return !I.atEnd() ? &*I : 0; } |